Refractory Blog Archives - Rongsheng Refractory Castable Manufacturer

High Alumina Refractory Castable Price

June 16, 2021January 13, 2020 by rsrefractorycastable

High alumina refractory castables is made of bauxite, cokestone as aggregate, silicon powder, calcium aluminate cement, water reducer, etc. It can produce high alumina castable with a volume density of 2.3-2.6g /cm3 and clay castable with a volume density of 2.2g/cm3 for customers to choose according to different use environment (design requirements) and choose the corresponding grade of aggregate.

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High aluminum refractory castable has high cold and hot strength, good wear resistance, heat shock resistance, anti-spalling, good volume stability at high temperature, long service life, etc. It is widely used in two-stage reformer, gas pipeline of gasifier, hydrogen reformer, sulfur recovery device, flue, cement kiln tail, kiln head cooling machine, blanking machine, etc.

High alumina refractory castables has been widely used and achieved good results, making significant contributions to the steel industry and other high temperature industries. The refractory castable with high aluminum and low cement is widely used in the lining of heating furnace, lining of ladle and middle coating, working layer of molten iron and lining of cement rotary kiln. There are many factors influencing the properties of high alumina refractory castables, such as powder, binder and dispersant. In addition, material quality and water content are also important factors.

It is worth noting that the water content not only reduces the total porosity of the high alumina refractory castables, but also speeds up the early hydration of aluminate cement, resulting in less bound water in the hydrate and an increased capacity per unit cementing, thus contributing to its strength at room, drying, and medium temperatures.At low temperature, the total porosity of high aluminum castable is close to that of ordinary castable, while at high temperature, the change of high aluminum refractory castable is not significant, and the increase of ordinary castable is nearly 4%.

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Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is professional refractory material manufacturer, with fully automatic production equipment, stable and reliable quality, welcome to purchase.

Low Cement Refractory Castable Preparation

June 16, 2021January 11, 2020 by rsrefractorycastable

Low cement refractory castables preparation process requirements are very strict, so there are many factors affecting the performance, mainly ultrafine powder, aluminate cement, refractory aggregate and admixture. Refractory aggregate and water consumption are also important factors.

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First of all, we know that the role of ultrafine powder on low cement refractory castable determines the performance of low cement series refractory castable pillar, it is no exaggeration to say, no ultrafine powder, there is no low cement series refractory castable. In low cement refractory castable, ultrafine powder plays the role of dispersing accelerator and structure compacting agent. The former makes the cement particles highly dispersed without flocculation, while the latter makes the microstructure micropores fully filled to enhance the strength. Ultrafine powder types include SiO2, a-al2o3, Cr2O3, ZrO2 and MgO. The specific surface area of SiO2 ultrafine powder is about 20m2/g, and its ergodic length is about 1/100 of that of cement particles, so it has good dispersion and filling property. With the increase of SiO2 ultrafine powder dosage, the strength increases and the fireproof decreases, and the appropriate dosage is ≥3%.

Aluminate cement variety, variety is different, the preparation of low cement refractory castables performance is also different. For example, when the mixture ratio and process conditions are basically the same, the dosage of ca-50 cement and ca-70 cement are 5%, and the compressive strength after drying, firing at 800℃ and 1100℃, respectively, the former is 45Mpa, 51Mpa and 59mpa, while the latter is 65, 70 and 74mpa respectively. This indicates that the performance of the low-cement refractory castable prepared by ca-70 cement is better than that of the low-cement castable prepared by ca-50 cement, but the cost is slightly higher.

The basic fit of castable remains unchanged, and the amount of refractory powder and cement is constant. The minimum amount of cement shall ensure sufficient strength at room temperature to meet the technical requirements of mold removal or hoisting of low cement refractory castables. The normal temperature compressive strength of this series of refractory castable is 15Mpa and 22Mpa respectively. Before 1100℃, the amount of cement is large, and the compressive strength after burning is high. At 1400℃ and 1500℃, the two are basically similar, and the amount of cement is slightly higher.

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Finally, we are a professional refractory castable manufacturers, the production of a variety of unshaped refractories, full range of products, can be customized, welcome to consult.

High Strength Wear Resistant Castable Supplier

June 16, 2021January 10, 2020 by rsrefractorycastable

The high strength wear resistant castable manufacturer is made of corundum or high quality bauxite clinker, silicon carbide, etc., as aggregate, and the introduction of a variety of micro powder, ultrafine powder, corundum powder and admixture as admixture.

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High strength wear resistant castable is often used as the distribution of CFB boiler, slag discharge tube, furnace dense phase area and furnace outlet, cyclone separator and inlet and outlet flue, feedback, slag cooler and other parts of complex structure, can be cast vertical mold and less vibration.

The wear resistant castable is made of optimized gradation design, with small wear resistance loss in use, high temperature strength and strong integrity, and with the addition of polymer, making the series of castable and base concrete bond firm.

Generally speaking, the important indexes of macrostructure of high strength wear resistant castable manufacturer are stomatal rate, water absorption rate, permeability, stomatal aperture distribution, volume density, true density, etc they are important indexes to evaluate the quality of refractory materials. In addition to the direct expression of their own meaning, these indicators are also closely related to other properties of high strength wear resistant castables, such as thermal shock resistance, slag resistance, mechanical properties, thermal conductivity, etc.

This series of refractory castable has the characteristics of high strength, scour resistance, good thermal shock stability and so on, the working temperature can be maintained above 900℃, welcome to consult and purchase.

High strength wear resistant castable sales

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High strength wear resistant castable manufacturer, it with good flame retardant, low water absorption, good durability, long service life and other characteristics.It also has the advantages of simple construction, quick operation, easy to grasp, good integrity, easy to repair, and not easy to fall off. RS group sincerely welcomes people from all walks of life to our factory for investigation, consultation and procurement, and to establish a long-term cooperative relationship with us to achieve a win-win situation.

Refractory Concrete For Sale

June 16, 2021January 9, 2020 by rsrefractorycastable

Refractory concrete manufacturing is made of aggregate, cementing agent, admixture three parts in accordance with a certain proportion of the mixture made of direct pouring of special concrete. According to different cementing agent, refractory concrete can be divided into aluminate refractory concrete, glass refractory concrete, phosphate refractory concrete and aluminum sulfate refractory concrete.

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Fireproof craft is simple, need not complex concrete although fireproof and load soften the beginning temperature is slightly lower than fireproof brick, firing craft, plasticity is good, convenient to make the integral product of complex shape, low cost, life and fireproof brick is similar, so use more and more widely. It is widely used in furnace lining, furnace door, furnace wall and electric furnace.

Refractory concrete manufacturing can maintain the required mechanical properties under long-term action at high temperature above 900℃. Its properties depend on the refractory materials and their proportions of all aggregate, admixtures and cementitious materials.

It is well known that the granular and powdered materials in refractory concrete are called aggregate and admixture respectively. Concrete mixture can be formed by pouring, vibration or ramming method, and according to the hardening characteristics of cementitious materials (such as gas hardness, hydraulic hardness, thermal hardness, etc.), adopt the corresponding measures to promote its hardening.

Refractory concrete is better than low temperature cementing agent, and has higher compressive strength at room temperature. At the same time, due to the good integrity of the masonry, the gas tightness of the furnace is good, and it is not easy to deform. The steel plate of the furnace shell outside can be cancelled, and the resistance of the furnace to mechanical vibration and impact is better than that of the brick masonry.

For example, in the side wall of the soaking furnace, mechanical wear and impact are more severe, life is several times higher than brick. Thermal stability is good, most or all of the aggregate is clinker, expansion and cement material contraction offset, so the thermal expansion of masonry is relatively smaller than brick, temperature stress is also small, and there are a variety of network, needle, chain crystalline phase in the structure, resistance to low temperature stress ability.

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The refractory concrete manufacturing production process is simple, eliminating the complicated process of making bricks. It can be made into a variety of precast blocks and can be mechanized construction, greatly speeding up the furnace construction speed, more than 10 times more efficient than bricklaying. Welcome to consult and purchase.

Steel Ladle Castable Manufacturer

June 16, 2021January 8, 2020 by rsrefractorycastable

Steel ladle castables manufacturing are mainly made of high aluminum and silicon, with high melting point, low thermal stress, good stability, good slag resistance, high thermal stability, strong resistance to alkaline slag erosion and other characteristics. And it has remarkable effect on the resistance of melt erosion. Steel ladle castables are suitable for high temperature parts of industrial kilns, permanent lining of ladles, and other non-ferrous metal smelting systems.

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Steel ladle castable are mainly used on large, medium and small ladles. The refractory castable product has long service life, safety and stability, and is an ideal refractory for ladle. This series of refractory castable has high refractoriness, guaranteed quality safety and good use effect. Customers can customize the drawing, digital processing, high automation degree of production equipment, high precision, welcome to consult.

The steel ladle castables manufacturing are used in steel mills and foundries for pouring molten steel in front of open-hearth, electric or converter furnaces. It has good explosion-proof performance, high temperature strength, slag corrosion resistance and erosion resistance.

According to the technical scheme of steel ladle castables manufacturing provided by the customer, we can design the thickness of ladle lining, install pouring mould according to the thickness of ladle lining, and conduct pouring construction according to the construction scheme of refractory castable. After pouring, the mould will be removed after curing and baking, and then put into use. Welcome the majority of users to consult.

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Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. Production and processing of a variety of unshaped refractory, product performance is good, can be customized, mechanical construction, liner integrity good, high service life advantages. Welcome to our factory to visit and negotiate with the majority of users, our refractory products of high quality, safe and reliable use, qualification certification is complete, welcome to contact us.

High Temperature Refractory Cement Price

June 16, 2021January 7, 2020 by rsrefractorycastable

High temperature refractory cement manufacturing is an unshaped refractory, according to the development of refractory materials, using the diversity of refractory raw materials, we found that all refractory raw materials can be made into powder used to prepare refractory cement.

Ordinary refractory cement is made of refractory clinker powder with plastic clay as binder and plasticizer. Its strength is low at room temperature, but ceramic bonding at high temperature has high strength.

The chemical bonded refractory cement with hydraulic, gas or thermal binding material as the binding agent produces certain chemical reaction and hardening before the temperature of ceramic binding.

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High temperature refractory cement manufacturing according to the composition of different materials can be divided into: clay refractory clay, high aluminum refractory clay, silica refractory clay, magnesium refractory clay. Refractory clay can be divided into the following three types according to the different mixture:

1. It is a mixture of refractory fine aggregate and ceramic binder (plastic clay). The delivery state is dry and needs to be used after adding water. It is hardened by ceramic bonding at high temperature.

2. It is a mixture of a refractory aggregate and a hydraulic binder (cement) that ACTS as the main bonding agent. The delivery state is only dry, use after adding water, no need to heat when hardening.

3. Chemically bonded refractory clay is a mixture of refractory fine aggregate and chemical binder (inorganic, organic, organic). The delivery state can be either slurry or dry, hardened below the ceramic bonding temperature. According to the hardening temperature, the refractory clay can be divided into two types: gas hardness and thermal hardness. Gas-rigid fire-resistant mud is usually prepared with gas-rigid binder such as water glass. Thermosetting refractories are prepared by phosphoric acid or phosphate. After hardening, this kind of hot and hard refractory has not only higher strength at various temperatures, but also shrinkage, tight joints, strong corrosion resistance and other characteristics.

High temperature refractory cement sales

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High temperature refractory cement manufacturing can be divided into finished products and semi-finished products. The so-called finished refractory cement is in the production of raw materials, clinker in proportion to the good, when the site use only according to the standard water mixing can; Semi-finished or non-finished refractory cement is raw material and clinker is not mixed together, the site use, according to the composition of the different mud mix, and according to the provisions of water to stir evenly.

Low Cement Castable Factory

June 16, 2021January 6, 2020 by rsrefractorycastable

We are a low cement castable supplier, specializing in the production of a variety of high fire resistance, high strength, reliable quality of unshaped refractory. Low cement refractory castable is mainly used in metallurgical, petroleum, chemical, machinery and other industrial kilns.

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Low cement castable has a wide range of applications, mainly applicable to melting aluminum furnace, static furnace furnace wall, top, bottom, etc., can also be used for aluminum water bag, flow groove, smelting equipment and high temperature furnace lining and other parts.

This series of refractory castable has high fire resistance, excellent high temperature performance, high strength, high medium and high temperature strength, and has high quality characteristics such as anti-spalling and anti-scour.

The low cement refractory castable produced by RS group are composed of high strength aggregate, high temperature resistant powder materials and admixtures, which are composed of a variety of polymers, reducing the amount of cement and optimized grading design. This series of low cement castable supplier has the characteristics of minimum wear resistance loss, high temperature strength, arbitrary molding, strong integrity, simple construction process control, excellent construction performance and so on. And because of the addition of high polymer, the bond with the base concrete is firm, the economic benefit is remarkable.

Low cement castable advantage：

1. High strength, high wear resistance, shock resistance, erosion resistance and oil permeability resistance;
2. Good flame retardant, low water absorption, high and low temperature resistance;
3. Good durability and long service life;
4. Simple construction, quick operation and easy to grasp;
5. Good integrity, easy to repair, not easy to fall off;
6. Non-toxic, tasteless, green and environmentally friendly, no physical damage to the operator.

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We are a high quality refractories manufacturers, is low cement castable supplier, the production of a variety of refractory products exported to all over the world, has been customers praise and trust. We sincerely welcome customers who have refractory material requirements to contact us, we will give you a timely reply.

High Aluminum Cement For Sale

June 16, 2021January 4, 2020 by rsrefractorycastable

The high aluminum cement manufacturing is a refractory castable made from high aluminum raw materials, such as aggregate and powder, with the addition of binder. Mainly used for urgent projects, such as pressure prevention, road and special repair projects, can also be used for winter construction projects. It is widely used in power station, boiler, melting and casting furnace, heating furnace, soaking furnace, heat treatment furnace and induction furnace etc.

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As we all know, high aluminum cement manufacturing is a kind of quick hard, high strength, heat and corrosion resistant cementitious material, the main characteristics of early high strength, high temperature and corrosion resistance. High aluminum cement is mainly used for urgent projects. Welcome to contact us.

Generally speaking, where the calcium aluminate based, alumina content of about 50% of the clinker, grinding hydraulic cementitious materials, known as high aluminum cement. Also known as refractory cement, professional name: aluminate cement.

High aluminum cement manufacturing, low cement content, reduce the production of low melt, improve the fire resistance, high temperature strength and slag resistance. Thus, the compactness of this series of refractory cement is improved, and the porosity is thus reduced. High aluminum cement can be used as a cementing material for heat resistant concrete, which is configured into heat resistant concrete. Welcome to consult and purchase.

This series of refractory cement has strong resistance to sulfate attack. Because it does not separate out free calcium hydroxide during hydration, it produces aluminum hydroxide gel, forming a protective film on the particle surface. Therefore, the corrosion resistance is decreased during the later crystal transformation. Suitable for low temperature curing concrete engineering.

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Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is excellent refractory material manufacturer, all kinds of production refractory cement, refractory castable. Products export more than 60 countries and regions, welcome to consult, we will serve you wholeheartedly.

Rotary Kilns Use Wear Resistant Castable

June 16, 2021January 2, 2020 by rsrefractorycastable

The wear resistance coefficient of the wear resistant castable manufacturing is the ability of the material to resist friction damage, which can predict the suitability of the refractory in the wear and scour environment. Wear resistance is mainly divided into friction, erosion and impact.

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Moreover, after purchasing the wear resistant castable, it has not been used reasonably according to its wear resistance and kiln parts. Finally, the wear resistance of wear – resistant castable decreases, erosion resistance decreases, cracking and falling off in a short time. Therefore, after we purchase refractory castable, must be in accordance with the operating instructions for use, only in this way can be effective, comprehensive play out the advantages of refractory products, improve economic benefits.

As is known to all, the inlet of rotary kiln will be repeatedly impacted and rubbed by materials during operation. In addition, due to the limitation of shape, this part is not easy to be built with refractory bricks, castables are often used for casting molding. As a result, this part is prone to breakage and spalling of castables. Wear resistant castable manufacturing, welcome to consult, we will serve for you wholeheartedly.

We can provide customized services for customers’ rotary kiln usage and cost control. Wear resistant castable manufacturing has the advantages of large volume density, high strength, excellent corrosion resistance, good wear-resistant performance, etc., can also be added to the original formula of silicon carbide and blue crystal powder, increase the wear resistance, alkali corrosion resistance and high temperature thermal shock stability of the refractory castable. Welcome to consult and purchase.

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Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is professional refractory castable manufacturer, production of various refractory products for more than 20 years, rich production experience, strong technical force, we sincerely hope that you have refractory material demand customers come to contact us.

Steel Ladle Refractory Castable Price

June 16, 2021December 30, 2019 by rsrefractorycastable

Steel ladle castable manufacturing is a kind of unshaped refractory which is made of high quality bauxite, corundum and high quality magnesia as main material, using composite powder and adding some additives. The main characteristics of ladle castable are good explosion-proof performance, high temperature strength, slag corrosion resistance, erosion resistance.

steel ladle castable

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Steel ladle castable manufacturing has the characteristics of strong corrosion resistance, good thermal shock resistance and high volume stability. It is widely used in the casting of small and medium- sized ladle lining, which can extend the service life of ladle effectively.

Compared with the brick lining, the lining of ladle casting has a larger water content and a better overall performance. At the beginning of the baking, if the temperature rises too fast, too high, then the steam inside the liner may not be able to get rid of; If the vapor pressure inside the liner exceeds the ultimate strength of the material, lamination and surface spalling parallel to the working surface can result. This internal lamination will lead to a large area of peeling and sticking steel during the use, thus reducing the lining’s service life.

Steel ladle castable manufacturing, agitator shall be used for agitator. Packaging bags, rope heads and other sundry materials shall not be mixed during agitator, which may affect the casting effect and service performance.

The water consumption and stirring time should be strictly controlled to ensure the consistency required for construction. Over – dilute refractory castable will seriously affect the quality of material performance. Every stirring amount, stirring time, adding water evenly uniform, not suddenly thick and thin. If you find that the consistency of mixing material is not up to the requirements, you should return to the mixer and add water or dry material for mixing. It is strictly prohibited to add water temporarily during pouring.

steel ladle castable for sale

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Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is professional refractory castable manufacturer. Rich production experience, refractory products complete, welcome to consult and purchase.