Industry News

Industry News

  • Causes and prevention measures of cracks and collapses in refractory bricks during drying

    Causes and prevention measures of cracks and collapses in refractory bricks during drying

    After the refractory bricks are formed, they need to be dried in a tunnel drying kiln. During the drying process, due to improper operation or other reasons, it is easy to cause quality reasons such as brick cracks. The following are the drying quality reasons and preventive measures that are pr...
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  • Anti-alkali corrosion test of corundum and mullite refractories in waste incinerator

    Anti-alkali corrosion test of corundum and mullite refractories in waste incinerator

    Abstract: In order to explore the mechanism of corrosion of refractory materials for waste incinerators by alkali metal compounds, three castables of mullite, corundum and chromium corundum were subjected to corrosion tests at 800, 1000, 1200 and 1350 ℃ for 30 hours by the alkali vapor method. C...
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  • The feasibility of replacing magnesia aluminum carbon bricks with corundum spinel castables in electric furnace steelmaking(二)

    The feasibility of replacing magnesia aluminum carbon bricks with corundum spinel castables in electric furnace steelmaking(二)

    2.2 Composition and structure of corundum-spinel castable after use The thickness of the original working layer is 230~250mm, and the apparent morphology of the impact area at the bottom of the 8# ladle after 91 times of use. The residual thickness of the corundum-spinel castable is about 120mm...
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  • The feasibility of replacing magnesia-aluminum-carbon bricks with corundum spinel castables in electric furnace steelmaking(一)

    The feasibility of replacing magnesia-aluminum-carbon bricks with corundum spinel castables in electric furnace steelmaking(一)

         Electric furnace ladle has harsh operating conditions: high tapping temperature (1640~1690℃), as many as 1,000 steel grades, wide range of slag alkalinity (n(CaO)/n(SiO₂)=0.5~5), refining Long time (120~150min), high heating power, etc. The bottom working layer of the package has long bee...
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  • Refractory castable construction method

    Refractory castable construction method

    1. Before the construction of refractory castables, the following inspections should be strictly carried out: (1) Check the appearance and cleanliness of the equipment to be poured; (2) Check the condition of construction machinery and tools, and spare parts such as vibrating tools must be intac...
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  • Advantages of sintered brick tunnel kiln lightweight mullite brick ceiling

    Advantages of sintered brick tunnel kiln lightweight mullite brick ceiling

    Product characteristics: low thermal conductivity, low heat capacity; high purity, low impurity content; high temperature resistance, direct flame contact; high strength, and excellent thermal shock resistance; can be cut at will. The mullite ceiling of the brick tunnel kiln includes multiple m...
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  • The introduction of magnesia brick

    The introduction of magnesia brick

                                                                                                       The main crystal phase of magnesia brick is periclase, which has the typical characteristics of general alkaline refractory products, but its thermal shock resistance is poor. It can be fired and no...
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  • 【Special Cement】Refractory Cement

    【Special Cement】Refractory Cement

    Any raw material with high-quality bauxite and high-quality lime as raw materials, mixed in a certain proportion to form an appropriate amount of raw material, after sintering, the clinker with aluminate as the main component is ground into fine powder, and made into a fire-resistant clinker Hyd...
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  • Some knowledge about corundum refractory castable

    Some knowledge about corundum refractory castable

    Among silicon-aluminum refractory castables, refractory castables with Al₂O₃ content greater than 90% belong to corundum refractory castables. Design principles of corundum castable Its raw material combinations come in many forms, such as (1) Use white corundum as aggregate and powder (2) Use p...
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  • How are refractory bricks fired(二)

    How are refractory bricks fired(二)

    2. Firing system In order to reasonably carry out the firing of various refractory products, the firing system of each product should be determined in advance, which includes: the higher temperature of firing; the heating rate at each stage; the holding time at the higher temperature; The cooli...
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  • How are refractory bricks fired(一)

    How are refractory bricks fired(一)

    The so-called kiln installation refers to the operation process of rationally arranging and stacking bricks that meet the technical conditions of semi-finished products in the kiln according to the structural characteristics of the kiln and the requirements of the thermal system when the product...
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  • Four key points that affect the performance of low cement castables must be known!

    Four key points that affect the performance of low cement castables must be known!

    Low-cement refractory castables are unshaped refractory materials that have been widely used in recent years, mainly including aluminum silicate, magnesia, and silicon. Its strength has been greatly improved, which is caused by many factors, among which the ingenious use of superfine powder and ...
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