Material for maintaining molten iron pretreatment tools online, preparation method and applications thereof

A technology for hot metal pretreatment and repair material, which is applied in the field of refractory materials for hot metal pretreatment before converter steelmaking, can solve the problems of difficult maintenance and repair construction, more abundant repair, shortened hardening time, etc., and achieves excellent repair and maintenance effect and renewable resources. The effect of a wide range of sources and simple repair and construction

Inactive Publication Date: 2016-12-07
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent not only failed to solve the problem of fast hardening speed of the binder itself under high temperature conditions, but further added magnesia, which further shortened the hardening time and could not guarantee the normal repair construction time
According to relevant reports at home and abroad, the repair material for online maintenance of hot metal pretreatment equipment is supplied in the form of mixed and rolled mud for on-site use. Due to the high ambient temperature of the hot metal pretreatment production site, the storage time of the repair material is greatly shortened. , at the same time, the amount of single repair fluctuates greatly, often the first generation o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Hot metal pretreatment equipment on-line maintenance and repair material 1 weighs 80 parts by weight and contains Al 2 o 3 Used refractory recycled materials, 15 parts of refractory clay, 1 part of silicon carbide, 1 part of CDQ coke oven dust removal coke powder, 3 parts of kyanite, 3 parts of solid aluminum dihydrogen phosphate powder, 3 parts of water-soluble Thermoplastic phenolic resin powder, 1.0 parts of metal silicon, 0.08 parts of polypropylene or polyethylene fiber and 0.5 parts of sodium humate;

[0023] The preparation method of on-line maintenance repairing material 1 for molten iron pretreatment equipment comprises the following steps:

[0024] 1) Weigh the Al containing 2 o 3 Used refractory recycled materials, refractory clay, silicon carbide, dry quenching coke oven dust removal coke powder, kyanite; binders and admixtures,

[0025] 2) The above-mentioned weighed raw materials are directly packaged into finished products after the dry materials are ...

Embodiment 2

[0030] The raw materials, preparation method and method of use of this embodiment are basically the same as in Example 1, except that:

[0031] Hot metal pretreatment equipment on-line maintenance and repair material 1 weighs 80 parts by weight and contains Al 2 o 3 Used refractory recycled materials, 150 parts of refractory clay, 1 part of silicon carbide, 1 part of CDQ coke oven dust removal coke powder, 3 parts of kyanite, 1 part of solid water glass powder, 2 parts of water-soluble thermoplastic Phenolic resin powder, 1.0 parts of metal silicon, 0.08 parts of polypropylene or polyethylene fiber and 0.5 parts of sodium humate.

Embodiment 3

[0033] The raw materials, preparation method and method of use of this embodiment are basically the same as in Example 1, except that:

[0034] Hot metal pretreatment equipment on-line maintenance repairing material 1 weighs 85 parts by weight and contains Al 2 o 3 Used refractory recycled materials, 10 parts of refractory clay, 5 parts of kyanite, 2 parts of solid aluminum dihydrogen phosphate powder, 5 parts of water-soluble thermoplastic phenolic resin powder, 0.5 parts of metal silicon, 1.5 parts of oxalic acid , 0.1 parts of polypropylene or polyethylene fibers and 0.6 parts of sodium humate.

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Abstract

The invention discloses a repairing material for maintaining molten iron pretreatment tools online, a preparation method and applications thereof. The repairing material comprises the following raw materials in parts by weight: 75 to 85 parts of Al2O3 containing used fireproof reclaimed material, 10 to 20 parts of fireproof clay, 0 to 5 parts of silicon carbide, 0 to 5 parts of dry quenching furnace dust-free coke powder, 3 to 6 parts of kyanite, 1 to 10 parts of binder, and 0.85 to 3.7 parts of additive. The weighed raw materials mentioned above are dry-mixed and evenly stirring in a stirring machine, and the mixture is directly packaged to obtain a finished product, namely the repairing <{EN0}>mMmaterial for maintaining molten iron pretreatment tools online. The cost of raw materials is low, the source of regenerated resources is wide, the repairing material is user-friendly, the repairing is convenient to carry out, the interface bonding strength of the repaired layers is strong, the anti-peeling performance is strong, and the repairing and maintaining effect is excellent.

Description

technical field [0001] The invention relates to the field of refractory materials for molten iron pretreatment before converter steelmaking, in particular to an on-line maintenance and repair material for molten iron pretreatment equipment and its preparation method and application. Background technique [0002] In order to meet the market's requirements for the quality of iron and steel products, continuously reduce the production cost of iron and steel products, and improve the market competitiveness of iron and steel enterprises, many iron and steel enterprises at home and abroad have carried out desulfurization or "three desulfurization" pretreatments on molten iron for steelmaking to optimize smelting. process, reduce production costs, and improve the quality of steel products. Even for the production of ordinary carbon steel, the sulfur content of molten iron in the furnace is required to be <0.020% to improve the final quality of steel products. It has been develop...

Claims

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Application Information

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IPC IPC(8): C04B35/66C21C7/064
CPCC04B35/66C21C7/064
Inventor 欧阳德刚但斌斌胡清明李明晖罗安智容芷君曾彤
Owner 武汉钢铁有限公司
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