Refractory Blog Archives - Rongsheng Refractory Castable Manufacturer

Wear Resistant Castable Matters Attention During Construction

June 16, 2021June 10, 2020 by rsrefractorycastable

Nowadays, many industries have been widely used in a variety of refractory castable, construction industry for castable application is the most, a lot of people are more familiar with the castable, but the novice is not very understand. So, wear resistant castable for sale in the construction of matters to note? We will give you a detailed explanation of the following!

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Precautions For Wear Resistant Castable

1. All metal to castable contact surface should be coated with asphalt or wrapped with ceramic fiber paper.

2. The gap of the retractor slot of the retractor brick should be filled with mortar.

3. Mortar joints between all wear resistant firebricks shall be <2.

4. The mortar between each wear-resistant firebrick should be filled, do not leave gaps, otherwise the flue gas will get in when the boiler is running, aggravating the erosion or peeling of the wear-resistant lining.

5. When laying wear resistant bricks, do not cut in principle. If cutting is really needed, each brick cannot be less than 1/2. If it cannot be satisfied, two pieces can be cut at the same time.

6. All the bricks from bottom to top close to push pull each have pull hook, on all support support plate, next brick all should be long shape brick and cooperate to give expand joint, in order to form a whole stable furnace wall body.

7. All mortar joints between bricks shall be coated with refractory resistant mortar, and all bricks shall be laid along the joints. If the corner or end face of bricks is broken, the bricks shall be replaced in case of cracks.

8. When laying bricks, tap them with glue or wooden hammers to make them stick together. Do not use hammers.

9. During the construction of RS high strength wear resisting castable, the amount of water added should be strictly controlled. Generally, the amount of water added should be 6-8. The stirring should be uniform.

10. Wear resistant castable for sale appliances used during construction must be clean and free from contamination, especially chemical contamination.

11. High strength wear resistant castable is formed with applied vibration motor during construction, and vibrates evenly, and the vibrator rod is pulled out slowly during vibration, so as to avoid cavitation of HF high strength wear resistant castable.

12. The wear resistant castable for sale should be checked after demodulation of this series of wear castable. Hammer can be tapped gently. If a clear echo is sent out, it indicates that the castable is relatively dense. At the same time can not appear honeycomb, pockmark. If the honeycomb, pockmarked area is larger, it should be partly chipped out for new construction.

13. After demoulding, the RS high-strength wear-resistant castable lining, which has been inspected and qualified, can be kept warm for 5-7 days before entering the next process.

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For wear resistant castable in the construction of the matters needing attention, this problem must have been known. If you have any questions about this, please contact us directly. We will serve you wholeheartedly.

Rongsheng High Alumina Refractory Castable

June 16, 2021June 9, 2020 by rsrefractorycastable

High aluminum castable is primarily introduced into the material of heat-resistant stainless steel fiber, so that it has a higher strength and thermal shock function, thus increasing its wear resistance and service life. High alumina refractory castable is mainly used in kiln mouth, cutting mouth, power plant boiler lining and other high temperature wear resistant parts.

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This series of refractory castable is mainly composed of high alumina aggregate, powder, adhesives and admixtures in a certain proportion. High alumina refractory castable has good high temperature performance, excellent refractoriness, abrasion resistance, high refractoriness and other characteristics. It is mainly used in metallurgy, smelting, chemical industry, non-ferrous metal and other industries, especially in the iron and steel industry, important applications in rotary kiln front mouth, disintegrating furnace, kiln hood and other parts.

This series of refractory high aluminium castable is a refractory castable made of high aluminium raw material with binder and aggregate in traditional ratio. On the basis of the preparation of high strength and high aluminum castable, we adjusted the granule gradation, added different admixtures, reduced the amount of cement, improved the performance, increased the moderate temperature strength and softening temperature under load, reduced the thermal conductivity coefficient, and achieved good thermal stability. The furnace body structure integrity is strong, the air tightness is better than the brick furnace, extends the furnace life, saves the furnace repair cost, the economic benefit is remarkable as the high aluminum refractory castable characteristic.

We produce each type of refractory castable is strictly prepared according to the boiler’s use position and the required performance, the proportion of each type of castable is different, even if it is the same model of castable price is also different. If you want to know the detailed price, you need to consult the online customer service, our customer service will tell you the most accurate pouring price according to your needs.

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The production process of this series of refractory products shall be based on the formula to select the raw materials for making high alumina refractory castable. Then according to the raw material formula to calculate the aggregate, powder gradation and binder, additive dosage, it is required to strictly control the aggregate powder particles. Put the weighing aggregate and powder into the blender and stir evenly, then pour the powder into the aggregate and stir evenly for 8-10 minutes. The stirred high aluminum castable is put into the ton bale, equipped with additives and binder, and then sealed. The packed high aluminum castable shall be stored in the warehouse, with date marks and moisture-proof and waterproof treatment.

Corundum Mullite Castable Price

June 16, 2021June 8, 2020 by rsrefractorycastable

Corundum mullite refractory castable is a kind of granular and powdery material made of refractory material and composed of a certain amount of binder and water. It has high fluidity, suitable for casting, and can harden without heating. Corundum mullite castable supply consists of refractory aggregate, powder, binder, admixture, water or other liquid materials. Generally in the use of the site by casting, vibration or tamping method casting molding, can also be made into prefabricated used.

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This series of refractory castables has the characteristics of high strength at high temperature, good thermal impact resistance and structural spalling resistance, good thermal shock resistance, high softening temperature under load, low creep rate at high temperature and good chemical corrosion resistance. Corundum mullite castable supply widely used in large and medium-sized cement kilns, coal injection pipe, kiln hood, cooling low wall, etc.

Corundum mullite castables is a kind of is given priority to with corundum and mullite refractory castable, which used as the main raw material, high-quality mullite clinker corundum powder as substrate, add pure calcium aluminate cement additives, explosion-proof fiber, agent, made from kyanite powder admixture, etc can be pouring construction not stereotypes refractories.

We are a high quality refractory castable manufacturer, long-term supply of all kinds of unshaped refractory, complete variety, variety, can be customized according to the kiln working conditions, affordable. Corundum mullite castable supply, stable and reliable quality, and many customers have reached friendly relations of cooperation, welcome to consult procurement, we will serve you wholeheartedly.

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We are a company specialized in providing integrated services of engineering design and joint development of product supply for industrial kilns. Integrating r&d, engineering services and production, we provide extensive services for metallurgy, chemical industry, building materials, electric power, casting and other industries. We have been committed to the development and production of high quality refractory materials for many years. The main production of high and low grade refractory castable, refractory cement and a variety of refractory materials, (including low cement series, light insulation series) and a variety of shaped refractory products. The annual production of various refractory more than 20,000 tons, over the years the company with high quality refractory, excellent product quality, to ensure the longevity of the operation of the industrial furnace, cast one after another high-quality projects.

Acid Proof Castables Manufacturing

June 16, 2021June 5, 2020 by rsrefractorycastable

Acid proof castable is a refractory castable made of acid-resistant refractory raw material as aggregate and powder and water glass as binder. It has a good ability to resist the corrosive action of all inorganic acids and organic acids except hydrofluoric acid and hot phosphoric acid. Acid proof castables is mainly used as an anticorrosive liner with the maximum operating temperature of about 1200℃.

As the main variety of amorphous material acid castable in addition to the common characteristics can be used directly without firing, in many types of amorphous material production process is relatively simple, do not need special equipment, high degree of mechanization, construction is the most simple, high material utilization rate. In addition, it has a higher room temperature strength, can be made into prefabricated parts in the kiln rotary site installation, such as chimney lining casting. Acid proof castables is mainly used in metallurgical industry kilns, but also widely used in petroleum, chemical, building materials, electric power and machinery industry kilns and thermal equipment.

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The main techniques of acid-resistant castable construction include:

1. During construction, the mixing ratio of refractory castable shall not be changed arbitrarily, and water or other materials shall not be added into the stirred refractory castable arbitrarily;

2. The formwork used for pouring shall have sufficient strength and stiffness, accurate supporting die size, and prevent deformation in the construction process;

3. The joint of the formwork shall be tight without leakage of pulp, and anti-stick measures shall be taken for the formwork.

4. Waterproof measures shall be taken on the insulating masonry surface in contact with the castable;

5. This series of refractory castables shall be continuously poured. Before the coagulation of the front layer castables, the pouring of the second layer castables shall be completed. Construction joints should be left on the center line of the same row of anchoring bricks.

6. Acid proof castables shall be maintained in accordance with the prescribed design method after construction, and shall not be subjected to external force or vibration during the maintenance.

Acid resistant refractory castable can resist 800~1200℃ acidic medium (nitric acid, hydrochloric acid, sulfuric acid, acetic acid, etc.). It is mainly used for lining of anticorrosive flue and chimney, acid tank, acid wash tank, nitric acid concentration tower, acid recovery furnace and other containers corroed by acid high temperature gas. In metallurgy, chemical industry, petroleum, light industry and other departments of thermal equipment is widely used.

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Our company is a processing, marketing all kinds of refractory castable (corundum castable, high aluminum castable, steel fiber castable). Our company has a standardized laboratory and a number of perfect analysis and testing instruments for regular finished product inspection, the main elements of the product, part of the trace elements for effective control, to ensure that the quality of products meet customer needs. We are committed to the production of high quality refractory materials, to provide customers with reliable products and wholeheartedly services.

RS Refractory Mullite Castable Manufacturing

June 16, 2021June 4, 2020 by rsrefractorycastable

The high temperature of mullite refractory castable can be used in direct contact with flame as working lining to achieve high temperature and energy saving. Low thermal conductivity, porous mullite aggregate batching, good thermal insulation performance. Can quickly oven, shorten oven period, remarkable economic benefits. Refractory mullite castable is commonly used in tube heating furnace, light diesel oil, ethane cracking furnace liner, atmospheric pressure reducing furnace, sulfur recovery unit, steam boiler, tortoise-shell network heat insulation layer, two shell and pipeline heat insulation monolayer, other industrial furnace door, fire hole, observation hole door lining and so on.

Because of its high melting point, high strength, small coefficient of thermal expansion and strong resistance to chemical corrosion. The refractory bricks made of pure Mullite are used in the transition zone of rotary kiln, showing a series of good performance such as high softening temperature under load, high strength at high temperature, small coefficient of expansion, good thermal shock stability and strong resistance to chemical corrosion.

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Refractory Mullite Castable Characteristics

1. It is suitable for working lining or heat preservation and heat insulation lining of a variety of industrial kilns, such as flame furnace, to realize high temperature energy saving;

2. High strength, small unit unit weight, used for industrial kiln roof, wall, door and other parts, structural weight than ordinary low cement castable reduced by more than 30%, eliminate structural brick breakage, collapse and other hidden dangers;

3. High quality porous mullite as aggregate, with a variety of micro powder, dispersant, low thermal conductivity, good insulation effect, compared with ordinary castable, can reduce furnace heat loss of 25%~35%, save fuel about 10%;

4. The construction is simple, which can be poured on site as a whole and formed into any shape of prefabricated parts assembly installation.

Mullite refractory castable is made of high quality mullite and composite ultrafine powder. Natural mullite crystals are elongated needles and radiating clusters and are often used to produce high temperature refractory materials. It is widely used as thermal barrier coating in C/C composite materials. This series of refractory castable is transformed into corundum mullite castable after adding corundum. The castable is made of dense corundum and Mullite as aggregate and white corundum powder, -Al2O3 micro powder and mullite powder as fine powder. It has the common advantages of corundum castable and mullite castable.

When the refractory mullite castable is added with corundum, it has more performance advantages than the mullite castable. The properties of corundum castable have good thermal shock stability, resistance to spalling, wear resistance and corrosion resistance to acidic medium. Therefore, corundum mullite castable has high compressive strength, high temperature volume stability and thermal shock resistance, excellent wear resistance and erosion resistance, and can be used for anti-wear lining of large power station boilers and lining of other high temperature kilns.

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We are a professional refractory manufacturer, committed to produce more high-quality refractory products, products exported to many countries and regions in the world, worthy of customer trust, welcome to consult and purchase.

Corundum Mullite Castable For Sale

June 16, 2021June 3, 2020 by rsrefractorycastable

Corundum mullite castable is a castable made with dense corundum and mullite as aggregate and white corundum powder, Al2O3 powder and mullite powder as fine powder. Corundum mullite castable manufacturing has the common advantages of corundum castable and mullite castable, high high temperature strength, thermal shock resistance and structural spalling resistance, thermal shock resistance, high softening temperature under load, low creep rate at high temperature, good chemical corrosion resistance.

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The mullite contained in corundum mullite refractory castable is rare in nature, and the mullite used in industry is artificially synthesized, with high purity, high density, good structure, low creep rate, small thermal expansion, good thermal shock resistance and chemical erosion resistance. Widely used in the refractory industry, and the development is relatively rapid, but if you compare corundum and mullite, the hardness and true density of corundum is much better than mullite.

Rigid jade products are made of refractory products with Al2O3 content of more than 90% and with corundum as the main crystal phase and with appropriate dispersant, coagulant and stainless steel fiber according to a strict formula. Corundum mullite castable manufacturing is mainly used for anti-wear lining of large power plant boilers and lining of other high- temperature kilns.

Properties of corundum mullite castable: it has the common advantages of corundum castable and mullite castable. High strength at high temperature, good thermal shock resistance and structural spalling resistance; Good thermal shock resistance, high softening temperature under load, low creep rate at high temperature, good chemical corrosion resistance. It has the advantages of high purity, high density, good structure, low creep rate, small thermal expansion, good thermal shock resistance and strong chemical erosion resistance. It is widely used in refractory materials and other industries. Corundum mullite castable manufacturing uses high quality refractory materials, and the refractory castable made has good thermal shock resistance.

This series of refractory castable concrete tube furnace can be used in the petrochemical industry, light diesel oil, ethane cracking furnace lining, atmospheric and vacuum furnace and sulfur recovery device and steam boiler, tortoiseshell net heat insulation layer, two barrel and pipe insulation monolayer, and other industrial furnace door, see the fire hole, observation hole door lining, large power station boiler wear lining, lining of gasifier, circulating fluidized bed boiler and cement rotary kiln coal injection pipe and other high temperature furnace lining.

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We are a professional refractory castable cement supplier with high quality, reasonable price, reliable before and after sales, which are sold in many countries and regions all over the world.

Clay Castable Characteristics

June 16, 2021June 1, 2020 by rsrefractorycastable

Clay binder is one of the main materials of clay refractory castable and an important component of matrix. Therefore, the variety and dosage of clay binder have important influence on its properties. There are many kinds of clay, and the clay in each place has different properties due to different mineral sites. In short, if the choice of clay binder is proper, the refractory castable with good performance can be prepared.

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The dosage of clay binder is 9%~12%. Because the combined clay contains more low-melting point substances, the fire resistance performance is poor, in order to meet the technical requirements for the preparation of clay castable, it should be reduced as much as possible. The effect of the type and amount of coagulant on the properties of clay refractory castable. For the compressive strength at normal temperature and 1400℃, the effect of ca-70 cement is better than that of ca-50 cement, but the cost increases greatly. With the increase of the dosage of coagulant, the compressive strength of normal temperature increases continuously, while the compressive strength of 1400℃ decreases continuously.

In the clay refractory castable, refractory aggregate plays the role of skeleton and is an important part of it, accounting for 60%~70% of the total material. Refractory aggregate varieties according to the content of Al2O3 as the data, with the increase of Al2O3 content, high temperature compressive strength, softening temperature under load starting point is also increased, softening temperature under load are more than 1520℃, grade iii alumina clinker aggregate slightly higher. Therefore, grade 3 bauxite clinker is widely used as refractory aggregate for common clay refractory castable, and good results have been obtained.

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The grading of refractory aggregate used for clay castables, the variety and fineness of refractory powder, water consumption and construction conditions, etc., also have certain influence on its performance ring, and the basic similar to the cement refractory castable, no need to repeat; There are many kinds of dispersants, through screening, sodium tripolyphosphate is widely used, and good results have been obtained dispersion effect.

Alkali Resistant Castable Applications

June 16, 2021May 29, 2020 by rsrefractorycastable

Alkali resistant castable belongs to aluminum silicate system of acid refractory castable. Its characteristic is that the crust can form a protective layer of corrosion resistance at the temperature of 1250℃. The alkali resistant castable supply can effectively prevent the erosion and penetration of the castable by alkaline airflow and materials in the cement kiln at high temperature. Alkali resistant refractory castable is a kind of alkali resistant castable made of aluminum silicate as refractory aggregate and powder and made of aluminate cement and admixture. Due to its high strength and low body density, it is widely used in cement rotary kiln.

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This series of refractory products are alkali-resistant castable made of aggregate and powder with high aluminum and silicon materials and binder. It is mainly used for lining of cement kilns, chemical kilns, waste incinerators and other thermal equipment. The refractory castable has high fire resistance, good thermal shock stability, and a certain degree of alkali erosion resistance, strong alkali resistance, good alkaline performance, high strength, no cracks after sintering peeling phenomenon.

The alkali resistant castable supply is divided into two kinds: heavy and light, which have good high temperature performance and alkali-resistant erosion performance. Alkali resistant castables has been applied in the coal jet nozzle and kiln mouth, preheater and pipeline systems of large and medium-sized dry cement kilns, and its effect is good.

High strength alkali resistant castable supply adopts low cement bonding technology, adding ultrafine powder and high efficiency dispersant, high strength, good thermal stability, impact resistance, erosion resistance, wear resistance, long service life. Excellent material selection, castable refractory up to 1790℃, excellent high temperature performance. Machine mixing, pouring construction, spraying type can be machine semi-dry spraying construction convenient, greatly shorten the time limit, significant economic benefits.

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Rongsheng Refractory is a comprehensive group enterprise integrating r&d, production, sales, overall solution of product technology, general contracting and operation of Refractory construction. With a fully automated batch-making line, complete r&d laboratory and product performance testing equipment, the quality is stable and reliable, welcome to consult and purchase.

Corundum Mullite Castable Composition

June 16, 2021May 28, 2020 by rsrefractorycastable

First, we need to know that corundum mullite castable mainly uses dense corundum and mullite as aggregate. Then white corundum powder, Al2O3 powder and mullite powder are used as the fine powder to make the high quality refractory castable. The corundum mullite castable supply is based on price and quality. Welcome to consult purchasing.

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Corundum mullite castable has remarkable properties and many characteristics. It has the common advantage of corundum castable and mullite castable. Corundum mullite castable supply provides high temperature strength, thermal shock resistance and structural spalling resistance, good thermal shock resistance, high softening temperature under load, low creep rate at high temperature and good chemical erosion resistance. Can be widely used in large power plant boiler anti-wear lining and other high temperature furnace lining.

We recommend corundum mullite castable to be used in front and back of large cement kilns, coal injection pipes and other industrial furnace linings. The mullite contained in this series of refractory castable is rare in nature, and the mullite used in industry is artificially synthesized, which has the characteristics of high purity, high density, good structure, low creep rate, small thermal expansion, good thermal shock resistance and strong chemical erosion resistance. Widely used in refractory materials and other industries, corundum mullite castable uses high quality refractory materials and has good thermal shock resistance.

Corundum mullite castable supply tube furnace can also be used in petrochemical industry, light diesel oil, ethane cracking furnace lining, atmospheric and vacuum furnace and sulfur recovery unit, steam boiler, making insulating layer, two barrel and pipe insulation monolayer, and other industrial furnace door, see the fire hole, observation hole door lining, large power station boiler wear lining, lining of gasifier, circulating fluidized bed boiler and cement rotary kiln coal injection pipe and other high temperature furnace lining.

This series of refractory material will be manufactured with appropriate powder. The addition of micro powder can fill the intergranular space, improve the internal structure, and produce a cohesive effect to densify; At the same time, it can significantly improve the fluidity and greatly reduce the construction water consumption. At 110℃, the addition amount at 24h is more than 8%, the shrinkage of castable increases, and there are many cracks. It is advisable to take 4%~5%, and the physical properties of castable with different content of micro-powder are different.

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If you are interested in corundum mullite castable, please contact Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. Our company has been producing and selling refractory materials for many years. The quality of our products is widely favored by customers. Our products are sold all over the country, and are exported to Russia, Japan, Syria, India, Turkey, Vietnam, Colombia and other countries. Welcome customers to visit our company on the spot.

High Alumina Low Cement Castables Sales

June 16, 2021May 27, 2020 by rsrefractorycastable

High alumina low cement castable is a kind of large amount of castable in the amorphous materials, that is, the calcium aluminate cement is about half of the ordinary cement castable or one-third of the castable. Compared with the general high aluminum castable, the high alumina low cement castables strength and erosion are greatly improved by using ultra-fine powder to reduce the cement content. It not only increases the volume density, but also reduces the porosity, and at the same time, increases the service life.

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High alumina low cement castable is developed on the basis of clay combined with refractory castable. Its main varieties are low cement, ultra-low cement, no cement or ultrafine powder and sol and other refractory castable. It is a combination of most of the advantages of refractory castable in one, with high density, low porosity, high strength, low wear, thermal shock and corrosion resistance properties of high quality refractory castable. Use effect is superior, social economy benefit is remarkable. The outstanding characteristic of high alumina low cement castables is density and high strength, which brings a lot of benefits for the use, but brings trouble to the baking. If the baking is not done properly, the phenomenon of spalling or blasting may occur easily. Therefore, for the high aluminum low cement castable baking to formulate a reasonable oven curve, but also the use of excellent explosion-proof admixture, so that the water in the body of refractory castable molding smoothly discharged, do not cause any side effects.

This series of refractory materials are used in metallurgy, petroleum, petrochemical, electric power, building materials and other industrial kilns, and a large part of them have replaced firebrick. However, as a manufacturer of refractory castables, we will still produce some high aluminum and low cement castables with different grades and different body densities according to the users’ different furnace types, temperatures and operating environments. Of course, different grades, different body densities and low cement castables also have different prices. The characteristics of high alumina low cement castables, also according to different levels of refractory powder, and different grades of the main material and different grades of the combination of medium, to determine the quality of the product. So that smaller particles, larger than the table two product, better sintering capacity, so that the castable can be more suitable for the user’s application.

In practical application, especially in construction, it is also very important to control the amount of water added. Generally, when leaving the factory, the manufacturer will attach the construction instructions of castable, in the construction, must be in strict accordance with the construction instructions, the refractory castable pouring good, good maintenance, play a better effect. All in all, regardless of production or application, different grades of castable must be determined according to the actual use (temperature, erosion, erosion), so as to meet the different needs of the market.

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High alumina low cement refractory castable has the characteristics of high strength, anti – erosion, anti – wear, excellent performance and so on. Reducing the amount of cement can enhance the thixotropy of castable, that is, the mixing material has a certain form, a little external force can be added to flow, remove the external force to maintain the obtained shape, so this series of refractory castable is also known as thixotropy refractory castable, self-flow castable. Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. are specialized in the production of refractory castable manufacturers, we have professional technical personnel and professional equipment and rich production experience, for your industrial facilities escort. Welcome to visit our company.