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Novel siliceous stemming for blast furnace taphole and preparation method thereof

A blast furnace tapping and siliceous technology is applied in the field of refractory materials to achieve the effects of improving the erosion resistance of slag iron, increasing the plasticity of the mud and good erosion resistance.

Inactive Publication Date: 2018-11-02
武汉钢实炼铁修造安装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the anhydrous taphole mud is pressed into the taphole channel after tapping, thereby blocking it. When the next tap is tapped, the sintered taphole mud is drilled through with an open machine drill bit to form a tap passage, and the molten iron And the slag is discharged from the channel to the outside of the furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The novel blast furnace tap hole of the present embodiment is used for 1080m 3 Blast furnace, according to weight percentage, raw materials include 40% pyrophyllite, 6% corundum powder, 15% silicon carbide, 6% ferrosilicon nitride, 8% clay, 5% pitch, 3% carbonaceous raw material, 2% metal silicon powder and 15% % coke, while adding a binder of 20% of the total weight of raw materials; the weight percentage of pyrophyllite with 1mm<particle size≤3mm in the described pyrophyllite is 40%, and the pyrophyllite with 325 mesh<particle size≤1mm is in the whole pyrophyllite The weight percentage in the pyrophyllite is 30%, and the weight percentage of pyrophyllite in the whole pyrophyllite with a particle size of ≤325 mesh is 30%; the carbonaceous raw material is carbon black, with a particle size of ≤325 mesh; the particle size of the metal silicon powder≤ 200 mesh.

[0023] Wherein, the particle size of the corundum is ≤200 mesh.

[0024] The particle size of the silicon ca...

Embodiment 2

[0032] The novel blast furnace tap hole of the present embodiment is used for 1080m 3 Blast furnace, according to weight percentage, raw materials include 37% pyrophyllite, 6% corundum powder, 17% silicon carbide, 7% ferrosilicon nitride, 9% clay, 6% pitch, 4% carbonaceous raw material, 3% metal silicon powder and 11 % coke, while adding a binder of 18% of the total weight of raw materials; the weight percentage of pyrophyllite with 1mm < particle size ≤ 3mm in the described pyrophyllite is 50%, and the pyrophyllite with 325 mesh < particle size ≤ 1mm is in the whole pyrophyllite The percentage by weight in the pyrophyllite is 20%, and the percentage by weight of pyrophyllite in the whole pyrophyllite with a particle size of ≤325 mesh is 30%; the carbonaceous raw material is flake graphite, with a particle size of ≤325 mesh; the particle size of the metal silicon powder≤ 200 mesh.

[0033] Wherein, the particle size of the corundum is ≤200 mesh.

[0034] The particle size of...

Embodiment 3

[0042] The novel blast furnace tap hole of this embodiment is used for 2200m 3 Blast furnace, according to weight percentage, raw materials include 34% pyrophyllite, 7% corundum powder, 16% silicon carbide, 8% ferrosilicon nitride, 9% clay, 7% pitch, 4% carbonaceous raw material, 4% metal silicon powder and 11 % coke, while adding a binder of 16% of the total weight of raw materials; the weight percentage of pyrophyllite with 1mm < particle size ≤ 3mm in the described pyrophyllite is 45%, and the pyrophyllite with 325 mesh < particle size ≤ 1mm is in the whole pyrophyllite The weight percentage in the pyrophyllite is 30%, and the weight percentage of pyrophyllite in the whole pyrophyllite with a particle size of ≤325 mesh is 25%; the carbonaceous raw material is earthy graphite with a particle size of ≤325 mesh; the particle size of the metal silicon powder ≤200 mesh.

[0043] Wherein, the particle size of the corundum is ≤200 mesh.

[0044] The particle size of the silicon ...

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Abstract

The invention belongs to the technical field of refractory materials and particularly relates to novel siliceous stemming for a blast furnace taphole and a preparation method thereof. The novel siliceous stemming is made with high-silicon material, acting as aggregate, to which micropowder materials, such as superfine carbon material and metallic silicon powder, are added; during use of the novelsiliceous stemming, the siliceous component may react with the surrounding matters, such as carbon and oxygen, to generate ceramic ore phases, such as SiC and SiO2; air holes and particulate gaps arefilled so that compactness of the stemming is improved; generated SiC has good scour resistance so that resistance to slag and iron erosion is improved for the stemming.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a novel siliceous gun clay for a blast furnace taphole and a preparation method thereof. Background technique [0002] Crack clay is a kind of unshaped refractory material used to block the iron hole of ironmaking blast furnace. At present, it can be divided into two types: water clay and anhydrous clay. Among them, water gun mud uses clay powder, broken clay refractory brick particles, and coke powder as the main raw materials, and appropriately adds asphalt, high-alumina bauxite, silicon carbide, etc., and uses water as a binder. Small blast furnace; raw materials for anhydrous taphole mud are generally corundum, high alumina bauxite, silicon carbide, clay, metal silicon, metal aluminum, sericite powder, ferrosilicon nitride and coke powder, etc., and anthracene oil, tar, resin, etc. are used as Binder is mainly used in large and medium-sized blast fur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/349C04B2235/3826C04B2235/3852C04B2235/425C04B2235/428
Inventor 何见林陈进军程红权邹尚彬裴汉钢
Owner 武汉钢实炼铁修造安装有限公司