Environment-friendly stemming and preparation method thereof

A kind of blast mud and environmental protection technology, applied in the field of refractory materials, can solve the problems of health hazards for operators, easy generation of toxic gas, and unfavorable rapid plugging, etc., to improve quality stability, avoid toxic gas generation, and improve opening performance and the effect of slag iron erosion resistance

Inactive Publication Date: 2016-08-31
ZHENGZHOU SAIWO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the binders of anhydrous clay commonly used in blast furnace clay mainly include coal tar, anthracene oil, asphalt, etc. The production cost of the above-mentioned binders is low and the process is simpl

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] Take a steel plant 2500m 3 Take a blast furnace as an example, the raw material ratio is as follows:

[0019] Bauxite 33% with alumina content ≥88%, coke 8%, graphite 3%, silicon carbide 18%, ferrosilicon nitride 7%, brown corundum 10%, clay 12%, sericite 4%, high temperature asphalt 2 %, kyanite 3%, plus binding agent accounts for 20% of the total mass of the above ingredients.

[0020] According to the above environmentally friendly gun mud, the particle size of the bauxite is >0.088mm and ≤3mm. The silicon carbide particle size is ≥0.088mm and <1mm. The grain size of the brown corundum is ≤0.088mm. The softening point of the high-temperature asphalt is 105-130°C. The bonding agent is a novolak resin.

[0021] The preparation method of environmentally friendly gun mud: Weigh various raw materials according to the mass percentage content ratio of environmentally friendly gun mud, dry-mix the weighed raw materials from the silo to the mixer for 2 minutes,...

Example Embodiment

[0022] Example 2

[0023] Take a steel plant 3200m 3 Take a blast furnace as an example, the raw material ratio is as follows:

[0024] Brown corundum 34%, coke 10%, graphite 5%, silicon carbide 15%, silicon iron nitride 5%, alumina content ≥80% bauxite 13%, clay 8%, sericite 2%, high temperature asphalt 4 %, 4% of quartz powder, and 18% of the total mass of the above ingredients.

[0025] According to the above-mentioned environmental protection gun clay, the granularity of the brown corundum is >0.088mm and ≤3mm. The silicon carbide particle size is ≥0.088mm and <1mm. The particle size of the bauxite with the alumina content ≥80% is ≤0.088mm. The softening point of the high-temperature asphalt is 105-130°C. The bonding agent is a novolak resin.

[0026] The preparation method of environmental protection clay: Weigh various raw materials in accordance with the mass percentage content ratio of environmental protection clay. Dry the weighed raw materials from the silo to the mixer ...

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Abstract

The invention provides an environment-friendly stemming and a preparation method thereof. The environment-friendly stemming is prepared from, by mass, 15-40% of aluminum containing aggregates, 2-15% of coke, 1-5% of graphite, 10-25% of silicon carbide, 5-20% of ferro-silicon nitride, 5-20% of aluminum containing fine powder, 5-15% of clay, 2-8 parts of sericite, 2-6% of high-temperature pitch, 2-15% of an expanding agent and a binding agent accounting for the total mass of the other materials by 15-30%, wherein thermoplastic phenolic resin serves as the binding agent. The environment-friendly stemming and the preparation method thereof have advantages that toxic gases are avoided, a furnace front operation environment is improved, environmental friendliness, low raw material consumption, high hardening speed and short sintering time are realized, opening performance and slag iron erosion resistance of the anhydrous stemming are improved, resistance of the anhydrous stemming to flushing and abrasion of high-temperature molten iron is enhanced, and quality stability of the anhydrous stemming is improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to an environmentally friendly gun clay and a preparation method thereof. Background technique [0002] Blast furnace ironmaking is currently the most important ironmaking method in the world, and blast furnace clay is a refractory material used to seal the taphole. The composition of blast clay can be divided into two parts: refractory aggregate and binder. Refractory aggregates refer to materials such as corundum, mullite, coke and mica, and the binders are water, tar and anthracene oil. According to the different binders used, taphole mud can be divided into two categories: water taphole mud and anhydrous taphole mud. Compared with blister mud, anhydrous taphole mud has the advantages of high temperature strength, erosion resistance, and strong resistance to molten iron erosion. [0003] At present, the binders of anhydrous clay commonly used in blast furnace clay...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/103C04B35/622C04B35/634
CPCC04B35/103C04B35/622C04B35/63476C04B35/63496C04B2235/3418C04B2235/3463C04B2235/3472C04B2235/349C04B2235/3826C04B2235/3852C04B2235/422C04B2235/425C04B2235/96C04B2235/9676
Inventor 张灿吕雪艳付武斌陈要学
Owner ZHENGZHOU SAIWO TECH CO LTD
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