Refractory Blog Archives - Rongsheng Refractory Castable Manufacturer

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.

Corundum Refractory Castables For Sale

June 16, 2021May 26, 2020 by rsrefractorycastable

Corundum castable is a refractory castable composed of corundum aggregate and powder and binder. Corundum refractory castables has higher mechanical strength and abrasion resistance than high alumina refractory castable and mullite refractory castable. It is mainly used as lining material of various kilns, such as boiler, blast furnace hot blast furnace, heating furnace, ceramic kiln and so on.

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The content of Al2O3 of rigid jade refractory products is more than 90%. The refractory products with corundum as the main crystal phase are made of dispersant, coagulant and stainless steel fiber, which are then compounded in strict accordance with the formula. It has high temperature strength, wear resistance and erosion resistance, high thermal conductivity, thermal shock resistance, corrosion resistance, good sealing performance, quick setting early strong and other characteristics. Corundum castable is generally made of industrial alumina or bauxite after sintering or electric melting, so industrial use belongs to artificial corundum, but the density and hardness of artificial corundum are relatively large, the use effect is also relatively significant.

Corundum refractory castables is widely used in circulating fluidized bed boiler, metallurgy, petrochemical, thermal power industry and other fields. This series of refractory castable can also be customized according to customer requirements. Corundum castable is mainly made of fused corundum and then compounded with a variety of fine powders and high-efficiency additives. The main features are high strength, good volume stability, excellent corrosion resistance, not affected by H2,CO and other reducing gases.

The corundum refractory castables are selected according to the use position and temperature. The specific types can be divided into chromium corundum castables, zirconium corundum castables, brown corundum castables, composite corundum castables, etc. Generally speaking, the chrome castable is mainly used for the lining of carbon black reaction furnace and coal-water slurry gasifier, and the operating temperature is generally above 1700℃. Zirconium corundum castable is mainly used in glass kiln and has the advantage of strong resistance to glass erosion. Brown corundum castable has good wear resistance and can be used for coal injection pipe in power plant, boiler lining, rolling furnace sliding rail, etc. The compound corundum castable is a compound corundum castable which is made by adding specific materials according to the different temperature and environment. Generally used in cement rotary kiln, non – ferrous metal melting furnace and steel industry.

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This series of refractory castable shall be stirred by a forced mixer, with each bag as a whole unit, and then mixed with multiple bags according to the actual amount. When the temperature is low or high, heating or cooling measures must be adopted to meet the requirements of the construction temperature. After the corundum castable is mixed with water, the construction must be completed within 30 minutes. It is strictly prohibited to mix the castable back with water or mix it with water twice.

High Alumina Refractory Castable Introduction

June 16, 2021May 22, 2020 by rsrefractorycastable

High alumina refractory products take up a large proportion in the construction of kilns. With the development of refractory materials, high alumina castable is widely used in kilns due to its convenience in construction. Rongsheng high alumina castable is a refractory castable made of high aluminum raw material as aggregate and powder, adding binder.

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It has high mechanical strength and good thermal shock resistance, anti – wear corrosion and other high – quality properties. It is mainly used as the lining of boiler, blast furnace hot blast furnace, heating furnace, ceramic kiln and so on.

The low content of cement in Rongsheng high alumina castable effectively reduces the production of low soluble material, thus improving the product’s fire resistance, high temperature strength and slag resistance. When mixing, the mixing water consumption is only about half of that of ordinary castable, so the density of castable is improved and the porosity is reduced. In addition, after molding and curing, the generated cement hydrate is less, and when heating and baking, there is no large amount of water leakage, reducing the strength of the medium temperature.

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Rongsheng high alumina castable at room temperature, with the addition of cement content, its wear will gradually reduce. We produce and sell various types of refractory castable cement, have a number of advanced refractory production lines, we are committed to the production of high efficiency and high quality refractory products. If you want to purchase refractory products, please feel free to contact us. We will provide you with high quality refractory materials and considerate service.

Clay Refractory Castable in Ireland

June 16, 2021May 21, 2020 by rsrefractorycastable

Clay refractory castables are sold all over the world, and we have recently entered into a friendly relationship with a customer in Ireland. Clay castable is widely used in various industrial furnaces. Generally speaking, the outlet temperature of clay refractory castable export is about 1000~1200℃.

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You can’t just look at the price when you buy clay castables. After all, the price determines the quality. When some customers purchase refractory castable, they hear that other manufacturers are cheaper, so they directly place orders in the cheaper one without paying attention to the quality of the product. In the end, there will be a lot of problems in the use of the product.

There is the quality of silicon powder added when making refractory castable, some of the addition of low-grade silicon powder, the strength of castable later will have a certain problem, silicon powder quality is not good castable, after drying, with the hand touch will peel, not to mention the strength and use time. There is no way to guarantee user usage. For the clay refractory castable export, the quality must be stable and reliable so that customers can use it at ease. Procurement of refractory castable, firmly believe RS material, quality assurance, considerate after-sales service.

The bulk density of clay refractory castable export is different from that of clay dense castable. The bulk density of general clay castable is 2.1g/cm3, while the bulk density of dense clay castable is 2.3g/cm3. Because other matrix materials are added in the process of dense clay castable, it is more slag and erosion resistant.

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We are a professional refractory products manufacturer, committed to the production of a variety of high quality refractory materials, the quality is stable and reliable, worthy of customer trust, welcome to consult and purchase.

Corundum Castables in California

June 16, 2021May 20, 2020 by rsrefractorycastable

Corundum castable is actually more commonly known as the aluminum content of more than 85% of the castable. Corundum refractory castables in the refractory castable, is a high-grade castable, because corundum castable high temperature resistance strength, and wear resistance to erosion, gas sealing performance is good, there is a rapid coagulation early strength characteristics.

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At present, it is mainly used in areas with high temperature and severe erosion. However, although corundum castable has high strength, its flexibility is not very good, just like corundum castable used at the mouth of the cement rotary kiln. Many corundum castable manufacturers add mullite to meet the special requirements of the mouth of the kiln.

Corundum refractory castables also has different grades and different additive materials, users can choose different corundum castable according to the location and temperature of use, there are chromium corundum castable, zirconium corundum castable, composite corundum castable.

To be specific, corundum castable is made of high quality refractory aggregate, with appropriate coagulant, dispersant and stainless steel fiber. Main characteristics of corundum refractory castables: high strength, good high temperature performance, volume stability, small thermal conductivity, slag penetration resistance, erosion resistance, construction convenience, furnace structure integrity, etc.

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Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is professional refractory supplier. We are committed to the production of a variety of high quality refractory castable cement, customers throughout the world, the quality of the product has been customer praise, you are welcome to come to consult and purchase.