Refractory Blog Archives - Rongsheng Refractory Castable Manufacturer

Low Cement Castable Advantages

June 16, 2021March 7, 2020 by rsrefractorycastable

The low cement castable feature are remarkable. Due to the low CaO content in low cement castable, the formation of low eutectic phase can be reduced, and then the refractoriness, high temperature strength and slag resistance are improved.

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The water consumption of low cement castable during construction is only 1/3~1/2 of that of general castable, so the porosity is low and the volume density is high. After the series of refractory castable is poured into shape, the cement compounds generated in the maintenance are less, and there is not a lot of hydration bond damage during heating and baking, which leads to the decrease of the medium temperature strength. According to the summary actually follows the progress of heat treatment temperature, the strength of low cement castable also advances gradually. Its strength composition can be properly adjusted to prepare the self – flow castable and pump pouring castable.

As we know, this series of refractory castable is made by using refractory aggregate and powder as refractory materials, adding binder and additives, and after mixing. The binder commonly used in castable is aluminate cement. The amount of cement added can affect the overall performance, high temperature strength and anti-erosion ability of castable. Low cement castable feature prominent, you are welcome to consult the purchase.

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Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is professional refractory castable cement manufacturer, production automation degree is high, the product type is complete, welcome the general user to come to the consultation, we will serve you wholeheartedly.

Clay Refractory Castable For Sale

June 16, 2021March 6, 2020 by rsrefractorycastable

Clay refractory castable is a high quality refractory castable made of various refractory materials. Clay refractory castable price reasonable, high quality, welcome to consult and purchase.

Clay refractory castable can be divided into clay, high aluminum, corundum mullite and high aluminum lightweight. According to its properties, it can be divided into ordinary type and high strength type clay castable.

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Compared with cement refractory castables, this series of refractory castables have the characteristics of high strength at medium temperature, high strength in hot state, good stability in finished volume, strong spalling resistance and so on. Welcome to contact with us, I plant production of clay refractory castable price concessions, stable and reliable quality, wide range of applications, is high quality refractory.

According to the temperature of the furnace and other thermal equipment, we have choose different types of clay bonded refractory castable reasonably. It can be used as lining for heating equipment such as heating furnace, soaking furnace and sintering furnace. The key parts, such as burner brick, water-cooled tube dressing, soaking pit opening and protruding belt, mixed iron truck desulfurization gun and certain parts of rotary kiln, are made of high strength clay refractory castable. Clay refractory castable price cheap, welcome to contact us.

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Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is professional refractory material manufacturer and supplier, the range of sales of refractory products is wide and has been well received by customers. The quality of products is stable and reliable, qualification certification is complete, welcome to consult.

Mullite Refractory Castable Price

June 16, 2021January 18, 2020 by rsrefractorycastable

Mullite is a kind of excellent refractory raw material, this kind of mineral is scarce, the production of mullite castable stable function, construction is convenient, applicable to a variety of industrial furnaces, we are a professional mullite refractory castable supplier, has been producing refractory has more than 20 years of time, for refractory materials, we can understand very much, will come here and we introduce the characteristics of the mullite refractory castable.

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Mullite refractory castable is mainly composed of high quality mullite and superfine composite powder. Natural mullite crystals are long and spindly and radially clustered, and are often used to produce high temperature refractories. It is widely used as thermal barrier coating in C/C composites. But natural mullite is very few, usually sintering or capacitance method such as synthetic. Mullite refractory castable suppliers specializing in the production of various refractory products, high quality, welcome to buy.

Mullite castable advantages：

1. Suitable for a variety of flame furnace and other industrial kiln lining or thermal insulation lining, to achieve high temperature energy saving;

2. High strength, small unit bulk density, used for industrial kiln roof, wall, door and other parts, the structural weight is more than 30% less than ordinary low cement castable, eliminate structural brick, 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 the heat loss of the furnace 25%~35%, save about 10% of fuel;

4. The construction is simple and convenient, which can be poured on site and assembled into any shape.

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Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is professional refractory manufacturer, rich production experience, we are mullite refractory castable supplier, refractory product export more than 60 countries and regions of the world, welcome to consult and purchase, we will serve you wholeheartedly.

Calcium Aluminate Cement For Sale

June 16, 2021January 17, 2020 by rsrefractorycastable

Calcium aluminate cement can also be called high aluminum cement. It and portland cement belongs to hydraulic cement. Due to the different mineral composition, calcium aluminate cement manufacturing characteristics are different.

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The construction performance of refractory castable is closely related to the process of calcium aluminate cement manufacturing. At the same time, the balance of construction performance and strength is also related to the control of calcium aluminate cement hydration process.

Calcium aluminate cement manufacturing is natural bauxite or industrial alumina and calcium carbonate (limestone) according to a certain proportion of the cooperation, calcined or electrofused and made, also useful iron bauxite and limestone through melting and made. Product quality is stable and reliable, welcome to consult and buy.

Generally speaking, the setting and hardening rate of calcium aluminate cement are also related to the curing temperature. With the increase of curing temperature, the setting and hardening rate of CA2 minerals is accelerated, while CA minerals are somewhat abnormal, which are relatively fast at about 20℃, slow at 30℃, and fast at higher than 30℃. According to the phase transition of calcium aluminate hydrate during heating, it is very important to choose suitable curing conditions. Because the hydration of calcium aluminate cement results in different hydrates with different curing conditions.

This series of refractory cement is widely used in metallurgy, chemical industry, petroleum, electric power, machinery, building materials and other industrial kilns and high temperature equipment. It has a good resistance to sulfate corrosion, good waterproof performance, high early strength, setting and hardening fast and other advantages, all products our company before the delivery of strict quality control, welcome to consult and purchase.

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Our products are used in metallurgy, chemical industry, building materials, electric power, military industry, non-ferrous metals, carbon industry and other high temperature, ultra-high temperature kiln and equipment refractory materials use requirements, refractory products throughout the domestic market, and exported to South Korea, India, Brazil, Jordan, South Africa and other international markets, has been praised by users.

Clay Refractory Castable Characteristics

June 16, 2021January 15, 2020 by rsrefractorycastable

Clay refractory castable for sale using bauxite, coke gemstone as aggregate, silicon powder, calcium aluminate cement, water reducer and other preparation, according to different use environment (design requirements), choose the corresponding grade of aggregate, can produce high aluminum castable 2.3 ~ 2.6g/cm3 volume density, volume density of 2.2g/cm3 clay castable for customers to choose.

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This series of refractory castable has the characteristics of high cold and hot strength, good wear resistance, heat shock, anti-spalling, good volume stability and long service life under high temperature. It is widely used in second stage reformer, gas pipeline of gasifier, hydrogen reformer, sulfur recovery device, flue, cement kiln tail, kiln head cooling machine, blanking machine, etc. Wide range of use, stable and reliable quality, welcome to consult and purchase.

Refractory clay castable is made of clay clinker and fine powder as raw materials, mixed with micro powder additive, and made of cement as binder. The bulk material is used to fill the gap between steel brick and shell of furnace throat and the secondary casting layer of bottom water cooling tube. Clay refractory castable for sale is used for leveling layer of bottom water cooling pipe or internal clearance of steel brick of furnace throat and clearance of steel brick and furnace shell, and also for hot air furnace system.

Clay castable has compact structure, excellent high temperature performance, good thermal shock stability and wear resistance, convenient construction, widely used in all kinds of neutral industrial kiln lining. Welcome to consult and purchase.

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We are an excellent refractory products manufacturers, numerous advantages, product variety, clay refractory castable for sale, stable and reliable quality, welcome the majority of users to consult.

Steel Fiber Castable Advantage

June 16, 2021January 14, 2020 by rsrefractorycastable

As we know, steel fiber castables can inhibit the shrinkage of castable during curing, grilling and high temperature use. After adding steel fiber, not only the toughness of refractory castable can be improved, but also the mechanical impact and mechanical strength can be improved.

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In general, after adding steel fiber, the thermal shock performance of castable is also improved. Steel fiber castables prevents fracture or spalling under the action of preventing microcrack and mechanical stress.

For steel fiber, generally use to join the crescent – shaped straight steel fiber. This kind of fiber can increase the contact area between steel fiber and castable, increase the friction force, and not affect the mixing and stirring performance.

It is worth noting that the use effect of steel fiber refractory castable is closely related to the production process, we should accurately according to the conditions of use, add the appropriate proportion of steel fiber, can not add excessive.

During the construction of this series of refractory castables, first of all, dry castables should be mixed and then mixed evenly, and then steel fiber should be added to stir. In this way, the steel fiber will not bend because of repeated stirring. If it is vibration molding, it is necessary to use attached vibrator, can not use insert vibrator construction, otherwise, will destroy the uniform distribution of steel fiber.

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Steel fiber refractory castable is mainly used to construct lining body of industrial kiln which is in contact with high-temperature gas or solid material. Steel fiber castables can also improve its thermal shock, mechanical shock. This series of refractory material stable and reliable quality, reasonable price concessions, worthy of customer trust, welcome to consult and purchase.

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.