#refractoryproducts

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What Refractory Castables Are Used in Various Parts of The Cement Kiln?

. . . These are materials manufactured as cement-based products that have a high tolerance for heat, wearing, and resistance to corrosive chemicals. Refractory castables are used within different parts of a cement kiln to ensure that the structure is intact and can operate over a long period of time.

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Japan to close over 7 million tons of blast furnace capacity within two years

In recent years, due to slowing steel demand, Japan has been shutting down blast furnaces or pushing to decommission older blast furnaces, and has committed to operational optimization, focusing on more competitive assets and products.

In September 2020, Nippon Steel Corporation, Japan's largest steel manufacturer, decommissioned its 1.5 million t/y (2,150m3) blast furnace No. 2 at its Kyushu plant (Yawata). Previously, blast furnace No. 2 was mothballed as part of a temporary production reduction plan due to a sharp drop in steel demand due to the new crown pneumonia epidemic. Meanwhile, Nippon Steel suspended operations at a smelting plant at its Kyushu plant, including bloom production facilities. In September 2021, Nippon Steel will completely shut down the upstream and midstream facilities of the Setouchi Plant (Ku), including the 2 million tons/year No. 1 blast furnace (2650m3) and the 1.6 million tons/year No. 2 blast furnace (2080m3). At the same time, the company also shut down a blast furnace (3700m3) with a capacity of 2.1 million tons/year at its Kansai plant (Wakayama).

Japanese steelmakers will continue to shut down blast furnaces. JFE Steel plans to close its refractory raw materials, steelmaking and rolling divisions at its East Japan plant (Keihin) in September 2023. Among other JFE Steel facilities, the 4.2 million tonne/year No. 2 blast furnace, a converter steelmaking workshop for slab production and an electric furnace steelmaking workshop for billet and bloom production will also cease operations. Nippon Steel plans to decommission a 4.2 million ton/year blast furnace (5270m3) at the East Japan Plant (Kashima) in early 2025, which will be the company's fifth blast furnace to be deactivated based on a capacity optimization plan.

In 2020, the No. 5 blast furnace of JFE Steel's West Japan Plant (Fukuyama) with a capacity of 3.6 million tons/year will be put into operation, and the expansion and upgrade of the 3.8 million tons/year No. 4 blast furnace of the West Japan Plant (Kurashiki) will be completed in 2021. However, the new capacity cannot fully compensate for the withdrawal of production capacity. It is estimated that Japan has withdrawn more than 7.3 million tons/year of ironmaking capacity since 2020, while the newly added capacity is about 4 million tons/year. An additional 8.4 million tonnes/year of ironmaking capacity will be shut down by 2026, following the successful implementation of planned projects.

Under the general trend of decarbonization, Japan may continue to reduce steel production capacity. However, it is difficult for Japan to completely abandon the mainstream blast furnace-converter production route, because there are certain difficulties in introducing a more sustainable DRI-electric arc furnace route, including the high cost of imported energy. Currently, the Japanese government and steelmakers are formulating a decarbonization roadmap and developing decarbonization technologies with the aim of significantly reducing their carbon footprint while preserving traditional production methods.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality refractory products are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:Japan to close over 7 million tons of blast furnace capacity within two years Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-product-solution Email:info@cxrefractories.com Website:https://www.cxrefractories.com

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𝐅𝐢𝐫𝐞 𝐁𝐫𝐢𝐜𝐤𝐬 𝐒𝐮𝐩𝐩𝐥𝐢𝐞𝐫𝐬 𝐈𝐧 𝐈𝐧𝐝𝐢𝐚 They are used in an electric kiln, gas kiln, etc. The firebricks can be with a lot or less pores, with a different variety of density, depending on which application is going to be used. 𝐕𝐢𝐬𝐢𝐭:http://globalrefractories.in/fire-bricks/

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Get a Quote for Best Quality Castable Cement At Refmon Industries

Are you looking for best quality Castable Cement supplier and manufacturer in india? Don't look further, Refmon industries offering Castable Cement for your industry at reasonable price. Refmon industries leading manufacturer and supplier of Castable Cement at best price.

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Leading Refractory Products Manufacturer for Industrial Use

Refmon Industries is the leading supplier of high-grade refractory products and solutions that are indispensable for industrial high-temperature processes. Ideal for heavy duty applications and we have a wide range of options. Check out our inventory and buy refractory products from our website.

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Refmon Industries - Refractory, Insulation, & Industrial Flooring Products Manufacturer Alwar, India

Hello friends, in this video you will see that Refmon Industries is a leading manufacturer of Refractory products, Insulation products, Industrial Flooring products etc. We manufacture these products in high quality and premium grade raw material. We have these products available at this competitive price at a reasonable rate. For more information visit our website now

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Refractory Solutions: Refractory Products for Your Industrial Needs! - Refmon Industries

Hey guys, Refmon Industries sharing this Informative video for essential products for industrial needs, like high alumina bricks, insulation bricks, refractory bedding material, gating refractory and castable cement. We deal in all kinds of Refractory, Insulation and Industrial flooring products. For more information visit at our website.

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Changxing Refractory focus on manufacturing refractory product. Main product: Fire brick, refractory castable, nozzle, cement, mortar and kinds of unshaped material for steel melting.

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Get the latest Refractory News and Industry News from Changxing Refractory. We offer refractory product, refractory castable, fire brick, cement, refractory mortar .

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The application of corundum materials

(1) Intensive measurement of density and grain size of fabricated corundum along with industrial automation of powder density.

(2) With the crystallization of the cast corundum aggregate, the water demand resistance of the corundum-spinel castable; The density and the thermal shock resistance at room temperature become worse. Other corundum with a particle size density of 345 g·cm shows that the castables are of different sizes.

(3) Considering that the bulk density of sintered corundum is 3.51.55.55·cm3, so it cannot be a one-sided material to synthesize the bulk compact soil of corundum ~ 3.55.55.cm-3 is the volume compact gravel surface of corundum; High volume induces fire resistance. Thermal shock deteriorates and increases the unit weight of refractory properties.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality refractory products are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:The application of corundum materials Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-product-solution Email:info@cxrefractories.com Website:https://www.cxrefractories.com

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The cement kilns are made of green and energy-saving refractory materials

"With green energy-saving refractory cement kiln" main technical indicators:?

1) Magnesium iron and aluminum spinel brick: volume is about 2.9 g/cm3 density, coefficient of thermal conductivity (25 ℃ to 350 ℃ +) 3.50 w/m.k;

2) Low thermal conductivity of magnesium aluminum spinel brick: volume density (work) 2.90 ~ 3.05 g/cm3, thermal insulation layer is not higher than 2.65 g/cm3, coefficient of thermal conductivity (700 ℃), 3.713 w/m.k, of which 2.508 w/m.k insulating layer;

3) Low thermal spalling brick: 30 volume density is not higher than 2.2 g/cm3, coefficient of thermal conductivity (700 ℃), 1.433 w/m.k;

4) Low thermal spalling brick: 50 volume density is not higher than 2.4 g/cm3, coefficient of thermal conductivity (700 ℃), 1.58 w/m.k;

5) Heat loss of kiln body: 82.31 ~ 84.38 kJ/ KGCL.This product for the low thermal conductivity series new materials, refractory materials used for cement kiln of all matching, low thermal conductivity, energy conservation and greatly reduce the cement kiln cylinder surface temperature and heat loss, the service life of the refractory materials used for cement kiln and repair cycle coordination and synchronization, improve the production efficiency.At present, the product has been used in many cement production lines.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality tundish dry vibration mix are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:Ladle magnesia refractory castable mixing notes Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-product-solution Email:info@cxrefractories.com Website:https://www.cxrefractories.com

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Influence of silica micropowder on the hydration of calcium aluminate cement

In most cases, silica powder is used together with cement and other binders. Silica powder has a higher surface area, which can provide more nucleation sites for the hydration products of calcium aluminate cement, which is beneficial to the crystallization of the hydration products, and improves the cementation between the castable particles, thereby increasing the castable Strength of Silica powder can change the hydration product composition of calcium aluminate cement.

Studies have shown that adding silica powder to the clay clinker castable combined with calcium aluminate cement and curing at 40°C can affect the production and conversion of calcium aluminate cement hydration products. Pure calcium aluminate cement is hydrated for 24 hours, and the production of β-C2AH8 and α-C2AH8 of its hydration products increases with the extension of curing time, but the production of α-C2AH8 gradually decreases after 24h. After adding silica powder to calcium aluminate cement, the production of α-C2AH8 and β-C2AH8 can reach the maximum after curing for 24 hours. After 24h, α-C2AH8 and β-C2AH8 were converted into calcein hydrate C2ASH8. Silica micropowder is collected by vapor precipitation in industrial production, and it contains a variety of alkali metal impurity elements inside, which makes it exhibit different chemical properties in aqueous solution, such as zeta potential and pH value. Some studies have shown that silica micropowders with different pH values in aqueous solutions have a greater impact on the hydration process of calcium aluminate cement (CAC).

With the increase of pH value (2.77, 6.91 and 7.66), silica powder can increase the hydration rate of calcium aluminate cement and promote the generation of hydration products. This may be because the higher the pH value of silica micropowder, the more OH- is ionized in the aqueous solution, which accelerates the "hydroxylation" process in cement hydration, thereby accelerating the hydration reaction of calcium aluminate cement and promoting the hydration products of cement are formed; When the pH value of the silica powder is low enough, the aqueous solution will dissociate more H+, and part of it will neutralize the OH- and hinder the "hydroxylation" process of calcium aluminate cement, thus Delayed the hydration rate of cement.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality changxing refractory products are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:Influence of silica micropowder on the hydration of calcium aluminate cement Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-product-solution Email:info@cxrefractories.com Website:https://www.cxrefractories.com

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The influence of cordierite on mullite-bauxite

(1) After heat treatment at 1000°C and 1300°C, the linear shrinkage of mullite-bauxite castables decreases with the increase of cordierite content;  (2) The bulk density of mullite-bauxite castables decreases with the increase of cordierite content;  (3) After heat treatment at 1000°C and 1300°C, the flexural strength of mullite-bauxite castables decreases with the increase of cordierite content; (4) When w (cordierite) = 5%, the compressive strength of mullite-bauxite castables after different heat treatment temperatures is the maximum；

(5) As the content of cordierite increases, the mullite-bauxite castable helps to improve the thermal shock resistance of the material, the strength retention rate of the material gradually increases, and the lower bulk density is conducive to material acquisition higher strength retention rate after thermal shock.

Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, blast furnace, AOD furnace, IF furnace, etc.

Article Source:The influence of cordierite on mullite-bauxite

More Refractory Products:https://www.wanhaorefractory.com/en/product.html

Website:https://www.wanhaorefractory.com/

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4 indicators that determine the high temperature performance of refractories

Refractory materials are subject to physical, chemical, and mechanical effects at high temperatures (usually 1000~1800°C) during use, which are easy to melt and soften, or are corroded, corroded, or cracked and damaged, causing the operation to be interrupted, and Contaminated materials. Therefore, it is required that refractory materials must have properties that can adapt to various operating conditions.

(1) Refractoriness

Refractoriness refers to the temperature at which a material reaches a certain degree of softening under the action of high temperature, which characterizes the performance of the material against high temperature. Refractoriness is the basis for judging whether a material can be used as a refractory material. The International Organization for Standardization stipulates that inorganic non-metallic materials with a refractoriness above 1500°C are refractory materials. It is different from the melting point of the material, and it is a comprehensive performance of a mixture of multiphase solids composed of various minerals.

(2) High temperature load deformation temperature

Also known as the refractory softening point under load or the refractory deformation temperature under load, it means the resistance of the refractory to the combined action of high temperature and load under a constant load or the temperature range in which the refractory exhibits significant plastic deformation. The maximum use temperature can be inferred from the refractory material’s load softening temperature.

(3) High temperature volume stability of refractories

Refractory materials produce volume expansion under the action of high temperature for a long time, which is called residual expansion. The size of the residual expansion (deformation) of refractories reflects the quality of high-temperature volume stability. The smaller the residual deformation, the better the volume stability; on the contrary, the worse the volume stability, the easier it is to cause deformation or damage to the masonry.

(4) Thermal shock stability

The ability of refractory materials to resist sudden changes in temperature without being damaged is called thermal shock stability. This performance is also called thermal shock resistance or temperature sudden change resistance.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality refractory products are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:4 indicators that determine the high temperature performance of refractories Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-product-solution Email:info@cxrefractories.com Website:https://www.cxrefractories.com

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The role and performance of the slag ball

1. How to determine the time and location of the slag ball? 　

When tapping reaches 3/4, use a special device to drop the slag ball from the top of the tapping hole 500 mm away from the slag surface, and the slag retaining effect is the best.

2. How to evaluate the use effect of slag ball?

The use effect of the slag ball can be evaluated by observing the shape of the tapping molten steel. When the slag retaining effect is good, the tapping molten steel should flow down in an annular shape. In addition, it can be judged by the color of the slag.

3. What is the function of the groove on the slag ball? How to calculate?

The function of the groove on the slag stop ball is to facilitate the flow of molten steel during the slag stop process.

The formula for calculating the groove volume is: V1=slot area*slot length=πr2/2*L

4. How to evaluate the performance of the slag ball after use?

The effect of the slag ball after use can be evaluated by the thickness of the slag layer in the ladle and the alloy yield. The thickness of the slag layer is small, the alloy yield is high, and the slag blocking effect is good.

5. What data need to be recorded in the field test?

The data that needs to be recorded in the field test include: tapping temperature, use time of slag ball, thickness of slag layer, alloy yield, etc.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality refractory products are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc.?

Article Source:The role and performance of the slag ball Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-product-solution Email:info@cxrefractories.com Website:https://www.cxrefractories.com

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Tasks and operations during the melting period of the electric furnace

Electric furnace steelmaking uses electric energy as the main heat source and uses three-phase alternating current or direct current. An electric arc is generated directly between the charge and the electrode, and the charge is melted at a high temperature by the electric arc, and then an oxidizer, slag-forming agent, ferroalloy, etc. are added to remove inclusions. The chemical composition and temperature of the molten steel are adjusted to the specified values and then injected into the ladle. Since the 1980s, electric furnaces have developed in the direction of large-scale, ultra-high power, direct current, continuity and automation, and the world's electric furnace steelmaking production technology has developed more rapidly.

Electric furnace melting period The melting period of the traditional smelting process accounts for 50% to 70% of the entire smelting time, and electricity consumption accounts for 70% to 80%. Therefore, the length of the melting period affects productivity and power consumption, and the operation of the melting period affects the smoothness of the oxidation period and the reduction period. (1) The main tasks of the melting period The massive solid charge is quickly melted and heated to the oxidation temperature; Slagging in advance, dephosphorization at an early stage, reducing the gas inhalation and volatilization of molten steel. (2) Operation during the melting period

Reasonable power supply, timely oxygen blowing, and slagging ahead of time.

Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, blast furnace, AOD furnace, IF furnace, etc.

Article Source:Tasks and operations during the melting period of the electric furnace

More Refractory Products: http://www.wanhaorefractory.com/en/product.html

Website: http://www.wanhaorefractory.com/