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Environment-friendly stemming for blast furnace and preparation method thereof

An environmentally friendly and blast clay technology, which is applied in the field of refractory materials, can solve the problems of affecting the high temperature strength of blast clay, limited furnace protection, and inconvenient operation in front of the furnace, and achieves excellent thermal conductivity, improved thermal shock resistance, and improved furnace life.

Active Publication Date: 2015-06-24
BEIJING JINGYEYUAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN102234199A discloses a high-titanium furnace clay. This invention uses raw materials such as titanium concentrate and rutile. big inconvenience
Chinese patent CN1025157789A discloses a blast furnace clay for the repair and protection of the iron hole. This invention uses vanadium-titanium iron powder with low cost, and the operation before the furnace has also been optimized. However, in the vanadium-titanium iron powder, vanadium-titanium The content is low, the furnace protection effect is limited, and the iron content in it is too high, it will seriously affect the high temperature strength of the gun clay

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The invention provides an environmentally friendly blast furnace clay, which includes aggregate, silicon carbide, titanium dioxide, white mud, coke powder and fine powder. Among them, the mass percentage of the above-mentioned raw materials is: aggregate 46%, silicon carbide 18%, titanium dioxide 8%, white clay 14%, coke powder 8%, micropowder 6%.

[0034] A binder is also included, and the content of the binder is 14% of the total mass of the blasthole clay.

[0035] Among them, the aggregate is high-alumina bauxite and used waste skateboard bricks; silicon carbide is one or more of 90SiC and used waste iron trench materials; It is T60 carbon-containing resin and phenolic resin powder.

[0036] The mass ratio of high-alumina bauxite to used waste skateboard bricks is 1:1; silicon carbide is a mixture of 90SiC and used waste iron trench materials, and the ratio of the two is 1:1; T60 carbon-containing resin and phenolic resin powder The mass ratio is 2:1.

[0037] Al i...

Embodiment 2

[0046] The invention provides an environmentally friendly blast furnace clay, which is prepared from aggregate, silicon carbide, titanium dioxide, white clay, coke powder, micropowder and a binder. Wherein, the mass percentage of the above-mentioned raw materials is: aggregate 50%, silicon carbide 14%, titanium dioxide 8%, white clay 14%, coke powder 9%, micropowder 5%.

[0047] A binder is also included, and the content of the binder is 17% of the total mass of the blasting material.

[0048] Among them, the aggregate is high-alumina bauxite and used waste skateboard bricks; silicon carbide is one or more of 90SiC and used waste iron trench materials; It is T60 carbon-containing resin and phenolic resin powder.

[0049] The mass ratio of high-alumina bauxite to used waste skateboard bricks is 2:1; silicon carbide is a mixture of 90SiC and used waste iron trench materials, and the ratio of the two is 1:3; T60 carbon-containing resin and phenolic resin powder The mass ratio i...

Embodiment 3

[0059] The invention provides an environmentally friendly blast furnace clay, which is prepared from aggregate, silicon carbide, titanium dioxide, white clay, coke powder, micropowder and a binder. Among them, the mass percentage of the above-mentioned raw materials is: aggregate 40%, silicon carbide 20%, titanium dioxide 10%, white clay 14%, coke powder 10%, and fine powder 6%.

[0060] A binder is also included, and the content of the binder is 19% of the total mass of the blasthole clay.

[0061] Among them, the aggregate is high-alumina bauxite and used waste skateboard bricks; silicon carbide is 90SiC; the micropowder is used waste iron trench material after impurity removal treatment; the binder is T60 carbon-containing resin and phenolic resin powder.

[0062] The mass ratio of high alumina bauxite to used waste skateboard bricks is 1:1; the mass ratio of T60 carbon-containing resin to phenolic resin powder is 3:1.

[0063] Al in high alumina bauxite 2 o 3 The mass p...

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Abstract

The invention provides environment-friendly stemming for a blast furnace. The stemming is prepared from aggregate, silicon carbide, titanium dioxide, white mud, coke dust, micropowder and a binding agent. The method for preparing the stemming comprises the following steps: proportioning aggregate, silicon carbide, titanium dioxide, white mud, coke dust and micropowder according to the mass percentage; performing dry mixing and grinding, adding the binding agent, and performing wet mixing and grinding to obtain the environment-friendly stemming for a blast furnace. The stemming has the advantages of small shrinkage rate, excellent thermal shock resistance, excellent washing resistance and excellent erosion resistance, and once tapping time reaches 100-180 minutes; in-situ generated TiC has an effect of protecting the furnace, and the service life of the furnace can be prolonged; T60 carbon-containing resin and phenolic resin are used as the binding agent to reduce generation of cancerogenic smoke and improve the operation environment.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to blast furnace clay, especially an environmentally friendly blast furnace clay, and a preparation method thereof. Background technique [0002] With the continuous development of my country's iron and steel industry, the large-scale blast furnace has become a trend. The typical characteristics of large and medium-sized blast furnaces are large iron output and long iron tapping time. Therefore, higher requirements are put forward for the clay material used for sealing the taphole. Currently, the widely used Al 2 o 3 The main raw materials of -SiC-C gun clay are various high-quality corundum, high-alumina bauxite and SiC and other high-quality raw materials. Although the performance has been improved, a large amount of primary resources are used, which is a serious burden on resources and the environment. [0003] Traditional Al 2 o 3 -SiC-C blast furnace clay has a good eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 范凌江左亮珠朱继昌田世锦田世秀
Owner BEIJING JINGYEYUAN NEW MATERIALS
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