Baking -free castable and method for making tapping hole by using same

A castable, no-bake technology, used in the field of refractory materials, can solve the problems of difficult hardening time control, poor fire resistance, bulging, etc., and achieve the effects of excellent molten iron resistance, dense structure, and low cost per ton of iron.

Inactive Publication Date: 2010-06-09
巩义市教育化工助剂厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ordinary resin-bonded no-bake castables currently on the market have problems such as difficult control of hardening time, poor fire resistance, and bulges caused by reactions between hardening accelerators and impurities such as iron in raw materials.

Method used

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  • Baking -free castable and method for making tapping hole by using same
  • Baking -free castable and method for making tapping hole by using same
  • Baking -free castable and method for making tapping hole by using same

Examples

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Embodiment 1

[0028] This case example provides a refractory material for small and medium-sized blast furnaces that does not need to be baked for tapping iron, which is made of aggregates, powders and binders. among them,

[0029] The granularity of the aggregate is 0-10 mm. The aggregate is composed of one or any combination of white corundum, sub-white corundum, brown corundum, super alumina, silicon carbide, and high-temperature spherical pitch.

[0030] The particle size of the powder is 0-180 mesh. The powder material is composed of one or any combination of silicon carbide, calcined a-alumina micro powder, micro silicon powder, metal silicon, high aluminum powder, and silicon carbide.

[0031] The weight ratio of various raw materials can be selected: aggregate: 74%, powder: 20%, binder: 6%.

[0032] When using the above castable to make the taphole, the preparation process is as follows:

[0033] Step 101: Cool down and clean the tap channel of the blast furnace.

[0034] This embodiment co...

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Abstract

The invention relates to the field of refractory materials and discloses a baking -free castable and a method for making a tapping hole by using the same. The baking -free castable is prepared from a skeletal material, powder and a binding agent, wherein the skeletal material is prepared from one or a mixture of several of white corundum, sub-white corundum, brown aluminium oxide, super alumina, silicon carbide and high-temperature ball asphalt; the powder is prepared from one or a mixture of several of silicon carbide, calcined alpha-alumina micro powder, micro silicon powder, silicon metal and high-alumina fly ash; the granularity of the skeletal material is no more than 10 millimeters and no less than 0 millimeter; and the granularity of the powder is no less than 0 mesh and no more than 180 meshes. The prepared tapping hole has excellent molten iron resistance, slag corrosion resistance and impermeability.

Description

Technical field [0001] The invention relates to the field of refractory materials, in particular to a baking-free castable and a method for making a tap hole using the same. Background technique [0002] At present, small and medium blast furnaces generally have only one tap hole, and the tapping interval is short. At present, resin or water-bound ramming materials are commonly used, but the ramming materials have the characteristics of loose structure, low oxidation resistance and low strength, resulting in iron troughs. The iron flow rate and maintenance labor intensity are high. [0003] However, cement-bonded castables with high compactness, long ironing time, and low iron cost per ton generally take more than 8 hours to tap iron after pouring and can only be used in blast furnaces with multiple tapholes. However, the common resin-bonded non-baking castables currently developed on the market have problems in hardening time control, poor fire resistance, and bulging caused by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李长安
Owner 巩义市教育化工助剂厂
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