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A press-fit sealing material for blast furnace and preparation method thereof

A technology for sealing materials and blast furnaces, applied in the field of refractory materials, can solve the problems of poor densification effect of sealing materials, and achieve the effects of short hardening time, appropriate strength and high content

Active Publication Date: 2017-02-01
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a press-in sealing material for a blast furnace and a preparation method thereof, aiming at solving the problem of poor compacting effect of the existing sealing material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A press-fit sealing material for a blast furnace, comprising 15 parts of 1-3mm high alumina bauxite, 10 parts of 0-1mm coal gangue, 20 parts of 0-1mm pyrophyllite, and 15 parts of 0-1mm coke according to the mass parts Gemstones, 5 parts of 30-80 mesh kyanite, 15 parts of clay, 6 parts of high alumina bauxite powder not larger than 200 mesh, 6 parts of silicon carbide powder not larger than 200 mesh, 5 parts of quartz powder not larger than 200 mesh, 3 parts Graphite powder not larger than 200 mesh, 35 parts of modified silica-alumina sol.

[0016] Al in the high alumina bauxite 2 o 3 The mass percentage content is ≥75%. The mass percentage of SiC in the silicon carbide is more than or equal to 90%. Al in the modified silica-alumina sol 2 o 3 The mass percentage content ≥ 15%, SiO in the modified silica-alumina sol 2 The mass percentage content of the modified silica-alumina sol is ≥10%, and the pH value of the modified silica-alumina sol is 8-10.

Embodiment 2

[0018] The difference from other embodiments is that the 1-3mm high bauxite in a press-fit sealant for a blast furnace accounts for 10 parts, the 0-1mm coal gangue accounts for 20 parts, the 0-1mm pyrophyllite accounts for 10 parts, and the 0-1mm pyrophyllite accounts for 10 parts. 10 parts of coke gemstone of ~1mm, 3 parts of kyanite of 30-80 mesh, 10 parts of clay, 10 parts of high alumina bauxite powder not larger than 200 mesh, 7 parts of silicon carbide powder not larger than 200 mesh, and 7 parts of silicon carbide powder not larger than 200 mesh 200 mesh quartz powder accounts for 10 parts, graphite powder not larger than 200 mesh accounts for 5 parts, and modified silica-alumina sol accounts for 45 parts.

Embodiment 3

[0020] The difference from other embodiments is that the 1-3mm high bauxite in a press-fit sealant for blast furnace accounts for 12 parts, the 0-1mm coal gangue accounts for 15 parts, the 0-1mm pyrophyllite accounts for 15 parts, and the 0-1mm pyrophyllite accounts for 15 parts. 12 parts of coke gemstones of ~1mm, 4 parts of kyanite of 30-80 mesh, 10 parts of clay, 10 parts of high alumina bauxite powder not larger than 200 mesh, 10 parts of silicon carbide powder not larger than 200 mesh, and 10 parts of silicon carbide powder not larger than 200 mesh 200 mesh quartz powder accounts for 8 parts, graphite powder not larger than 200 mesh accounts for 4 parts, and modified silica-alumina sol accounts for 40 parts.

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PUM

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Abstract

The invention provides a pressed-in sealant for a blast furnace and a preparation method thereof and aims to solve the problem that existing sealants have a poor densification effect. The pressed-in sealant successively comprises, by weight, high aluminium bauxite, gangue, pyrophillite, flint clay, kyanite, clay, high alumina bauxite powder, silicon carbide powder, quartz powder, graphite and modified sliicon-alumininm sol. The prepared sealant matrix has high content and good fluidity, can slowly wriggle in a small slit and has good permeability. The modified sliicon-alumininm sol has short bonding and hardening time, the strength is suitable, and a hardened product has elasticity and will not become hard and fragile or crack. The product has good endophilicity and excellent seal performance, and is firmly glued with a steel casing and a furnace lining to form an integral body so as to greatly prevent gas from fleeing along the slit.

Description

technical field [0001] The invention belongs to the field of refractory materials, in particular to a press-in sealing material for a blast furnace and a preparation method thereof. Background technique [0002] At present, when the press-in method is used to repair the blast furnace, there are mainly two types of refractory materials used, namely, water-based bonding materials and materials using phenolic resin as a bonding agent. The water-based binding material is mainly composed of water glass, cement and phosphate, and its main chemical composition is A1 2 o 3 , Fe 2 o 3 、K 2 O+Na 2 O, SiC, and water-based bonding materials have high bonding strength, but the furnace lining temperature is high during repairing. The hot repairing material prepared in the patent CN103382395A evaporates quickly, and the repairing layer is brittle and easy to foam and fall off, resulting in non-dense repairing , easy to peel off. The press-in sealing compound prepared by phosphate bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 常正钦王立旺李新明张会球
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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