#refractorycastable

"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:[email protected] Website:https://www.cxrefractories.com

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:[email protected] Website:https://www.cxrefractories.com

(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

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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:[email protected] Website:https://www.cxrefractories.com

Tundish dry vibrating materials can be constructed on-site by two methods, direct vibration and indirect vibration, to obtain a uniform and dense overall structure. The direct vibration method uses a vibrator to directly vibrate the refractory material. After a layer of refractory material is fully vibrated by the vibrator, the surface of the refractory material is raked, filled with a new layer of material, and then fully vibrated by the vibrator. This is done layer by layer until the construction is completed. During construction, delamination between layers should be avoided. Indirect vibration is the vibration force generated by the vibrator fixed on the inner or outer mold is transmitted to the dry vibrating mix through the template, so as to make it dense.

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:Typical dry vibrating material performance

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

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