Preparation method of silicon carbide abrasion-resistant fire-resistant furnace body lining brick

A refractory furnace and silicon carbide technology, applied in the field of furnace lining bricks, can solve the problems of short service life of clay-bonded furnace lining bricks, avoid sticking to the furnace wall, inhibit oxidation and decomposition, enhance compactness and wear resistance Effect

Inactive Publication Date: 2014-05-07
TANGSHAN TENGXIANG WEARABLE REFRACTORY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of short service life of the existing clay-bonded furnace lining bricks, and provides a furnace lining brick that can improve the mechanical properties, oxidation res

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: A kind of preparation method of silicon carbide wear-resistant refractory furnace body lining brick, carry out according to the following steps:

[0022] a. Ingredients:

[0023] In parts by weight, the main ingredient proportioning is as follows:

[0024] 30 parts of waste high-voltage electric ceramics with a particle size of 1mm-3mm; 20 parts of fused brown corundum with a particle size of less than 1mm; 5 parts of high-alumina bauxite clinker with a particle size of ≥300 mesh; 8 parts of SiC with a particle size of 12 parts of 300 mesh SiC; 10 parts of SiC with a particle size of 5 μm; 15 parts of high-quality clay fine powder with a particle size ≥ 300 mesh; a total of 100 parts.

[0025] Combined sintering aid: phosphate solution, the total amount added accounts for 5% of the total weight of the above main ingredients;

[0026] Retarder: citric acid, accounting for 0.02% of the total weight of the above main ingredients;

[0027] Antioxidant: met...

Embodiment 2

[0032] Embodiment 2: A kind of preparation method of silicon carbide wear-resistant refractory furnace body lining brick, carry out according to the following steps:

[0033] a. Ingredients:

[0034] In parts by weight, the main ingredient proportioning is as follows:

[0035] 40 parts of waste high voltage electric porcelain with a particle size of 1mm-3mm; 10 parts of fused brown corundum with a particle size of less than 1mm; 7 parts of high-alumina bauxite clinker with a particle size of ≥300 mesh; 3 parts of SiC with a particle size of less than 1mm; 15 parts of 300 mesh SiC; 5 parts of SiC with a particle size of 5 μm; 20 parts of high-quality clay fine powder with a particle size of ≥300 mesh; a total of 100 parts.

[0036] Combined sintering aid: phosphate solution, the total amount added accounts for 7% of the total weight of the above main ingredients;

[0037] Retarder: citric acid, accounting for 0.06% of the above-mentioned main ingredient gross weight;

[003...

Embodiment 3

[0044] Embodiment 3: A kind of preparation method of silicon carbide wear-resistant refractory furnace body lining brick, carry out according to the following steps:

[0045] a. Ingredients:

[0046] In parts by weight, the main ingredient proportioning is as follows:

[0047] 35 parts of high-alumina bauxite clinker with a particle size of 1mm-3mm; 15 parts of fused brown corundum with a particle size of less than 1mm; 10 parts of high-alumina bauxite clinker with a particle size of ≥300 mesh; 5 parts of SiC with a particle size of less than 1mm; 12 parts of SiC with a particle size ≥ 300 mesh; 8 parts of SiC with a particle size ≥ 300 mesh; 15 parts of high-quality clay fine powder with a particle size ≥ 300 mesh; a total of 100 parts.

[0048] Combined sintering aid: 42.5% phosphoric acid solution, the total amount added accounts for 8% of the total weight of the above main ingredients;

[0049] Retarder: oxalic acid, accounting for 0.04% of the total weight of the above...

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PUM

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Abstract

The invention relates to a furnace body lining brick for the vertical furnace of a sintering pelletizing machine, and particularly relates to a preparation method of a silicon carbide abrasion-resistant fire-resistant furnace body lining brick. The preparation method comprises the following steps of blending; mixing; carrying out machine pressure forming; firing at high temperature; and adding antioxidant metallic silicon powder by taking phosphate as a bonding agent, taking sodium tripolyphosphate or sodium hexametaphosphate as a deflocculant and taking oxalic acid or citric acid as a inhibiting agent, wherein a main material comprises waste high-voltage electric porcelain or bauxite chamotte, electric melting brown fused alumina or bauxite chamotte, electric melting brown fused alumina or bauxite chamotte, SiC granules, fine SiC powder and fine high-quality clay powder, the grain size of the waste high-voltage electric porcelain or the bauxite chamotte is 1-3 mm, the grain size of the electric melting brown fused alumina or the bauxite chamotte is less than 1 mm, the grain size of the electric melting brown fused alumina or the bauxite chamotte is more than or equal to 300 meshes, and the grain size of the fine high-quality clay powder is more than or equal to 300 meshes. According to the furnace body lining brick, the usage temperature interval is 1100-1400 DEG C, the compressive strength is more than 60 Mpa, the apparent porosity is lower than 15%, the abrasion-resistant value is less than 5 cm<3>, and the thermal shock stability is tested through a water cooling method more than 20 times.

Description

technical field [0001] The invention relates to a furnace body lining brick for a sintered pellet machine shaft furnace, in particular to a preparation method of a silicon carbide wear-resistant and refractory furnace body lining brick. Background technique [0002] At present, the raw material pellets used in smelting blast furnaces are all produced by mechanical shaft furnaces. In existing mechanical shaft furnaces, the lining bricks of the furnace body are clay-bonded bricks. The lining bricks of the furnace body, especially the lining bricks at the lower part of the furnace body, are funnel-shaped. Resistance, wear and tear is quite severe. Again because of this position is the bottom of the furnace body, it plays a supporting role to the overall lining brick of the furnace body, and it must be replaced by removing all the lining bricks on its top. The service life of the furnace lining brick depends on the wear resistance of the refractory material, and what's more, i...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 刘宗合刘印彪陆云龙
Owner TANGSHAN TENGXIANG WEARABLE REFRACTORY MATERIAL CO LTD
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