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Mullite steel fiber castable

A mullite steel and castable technology, applied in the field of unshaped refractory materials, can solve the problems of poor thermal shock performance and erosion resistance, affecting service life, and prone to cracks, etc., to achieve good thermal shock resistance, high resistance Compressive strength and flexural strength, low production cost

Active Publication Date: 2010-08-18
巩义市科恒耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor thermal shock performance and erosion resistance of ordinary high-alumina castables during use, which seriously affects the service life; and cracks and collapses are prone to occur locally during use, and the volume shrinks after being affected by high temperature The change is particularly large, which has caused great disadvantages to the safety of the on-site operator

Method used

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  • Mullite steel fiber castable

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Raw material ratio of the mullite steel fiber castable of the present invention: represented by weight percent, consisting of 35% of brown corundum, 15% of Shanxi high-quality high-alumina bauxite clinker (grain size is 5-8mm), and 30% of sintered mullite , 10% fused mullite (200 mesh fineness), 5% silica powder, 3% coagulant (Lafarge cement) and 2% stainless steel fiber.

[0025] Medium Al in brown corundum used as raw material 2 o 3 The content of ≥95%; Al in high-quality high-alumina bauxite clinker in Shanxi 2 o 3 The content of ≥85%; Al in the sintered mullite 2 o 3 The content of ≥72%; Al in the fused mullite 2 o 3 content ≥ 72%;

[0026] 35% of the raw material brown corundum used in the mullite steel fiber castable of the present invention is composed of 10% of 3-5mm brown corundum, 15% of 1-3mm brown corundum and 10% of brown corundum with a fineness of 200 mesh;

[0027] 30% of the raw material sintered mullite used in the mullite steel fiber castable ...

Embodiment 2

[0030] Embodiment 2: basically the same as Embodiment 1, the difference is:

[0031] Raw material ratio of the mullite steel fiber castable of the present invention: represented by weight percent, consisting of 29% of brown corundum, 15% of Shanxi high-quality high-alumina bauxite clinker (grain size is 5-8mm), and 32% of sintered mullite , 12% fused mullite (200 mesh fineness), 6% silica powder, 3.5% coagulant (Lafarge cement) and 2.5% stainless steel fiber.

[0032] The mullite steel fiber casting material of the present invention uses 29% of brown corundum as a raw material, which is composed of 8% of 3-5mm brown corundum, 13% of 1-3mm brown corundum and 8% of brown corundum with a fineness of 200 mesh.

[0033] The 32% sintered mullite used in the mullite steel fiber casting material of the present invention is composed of 20% sintered mullite of 1-3mm and 12% of sintered mullite of 0-1mm.

Embodiment 3

[0034] Embodiment 3: basically the same as Embodiment 1, the difference is:

[0035] Raw material ratio of the mullite steel fiber castable of the present invention: represented by weight percent, consisting of 40% of brown corundum, 10% of Shanxi high-quality high-alumina bauxite clinker (grain size is 5-8mm), and 30% of sintered mullite , 8% fused mullite (fineness: 200 mesh), 7% silica powder, 2% coagulant (Lafarge cement) and 3% stainless steel fiber.

[0036] The mullite steel fiber casting material of the present invention uses 40% of the raw material brown corundum, which is composed of 12% of the 3-5mm brown corundum, 16% of the 1-3mm brown corundum and 12% of the fineness of the 200 mesh brown corundum.

[0037] The 30% sintered mullite used in the mullite steel fiber casting material of the present invention is composed of 18% 1-3mm sintered mullite and 12% 0-1mm sintered mullite.

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Abstract

The invention discloses a mullite steel fiber castable, which comprises the following raw materials in percentage by weight: 29 to 40 percent of brown alumina, 10 to 15 percent of high alumina bauxite clinker, 18 to 32 percent of sintered mullite, 8 to 12 percent of electric-cast mullite, 3 to 7 percent of silicon micro powder, 2 to 5 percent of coagulant and 1 to 3 percent of stainless steel fiber. The mullite steel fiber castable is prepared by stirring the mixture of raw materials which are prepared according to proportion for 5 to 10 minutes. Compared with the conventional common high alumina castable, the mullite steel fiber castable prepared by the technical scheme of the invention has high compressive strength, high rupture strength and high volume density. The mullite steel fiber castable product of the invention has high thermal shock resistance, high anti-scour performance and high volume stability.

Description

1. Technical field: [0001] The invention relates to an unshaped refractory material, in particular to a mullite steel fiber casting material. 2. Background technology: [0002] In the application of refractory materials, unshaped refractory materials have the advantages of less investment, low energy consumption, good thermal shock stability of the overall lining, good air tightness, and the ability to repair furnace linings, etc. Materials are more widely used. Castable is currently the most widely produced and used unshaped refractory material. It is mainly used to build integral structures such as the lining of heating furnaces. Its high-quality varieties can also be used in smelting furnaces. The refractory castables commonly used in industry mainly include alumina Salt castables, water glass castables and phosphate castables, etc. [0003] At present, a kind of amorphous refractory material used in the iron hook trench cover, the lower part of the tap nozzle and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 白周武王金元苏建平牛鸽白周文
Owner 巩义市科恒耐火材料有限公司
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