Magnesium gunning refractory for copper smelting-furnace

A technology of copper smelting furnace and gunning material, which is applied in the field of metallurgy, can solve the problems of increasing energy consumption and labor workload, affecting the service life of the inner lining, and discontinuous production, so as to reduce the labor intensity of the workers, improve the life of the furnace lining, Guaranteed continuity of effect

Active Publication Date: 2008-01-30
河南荣耀产业管理有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this part is damaged, the current measure is to stop the furnace, and after cooling down, remove the damaged refractory lining and replace it with a new refractory lining, which causes discontinuity in production and affects the The service life of the lining in other parts increases, while increasing energy consumption and labor workload

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The magnesia gunning material for copper smelting furnace of this embodiment is prepared by the following steps:

[0021] a. First, under normal temperature conditions, it is taken by weight: 10% of fused magnesia with particles of 3-5mm, 10% of sintered magnesia; 10% of sintered magnesia with particles of 1-3mm, and 15% of forsterite 15% of sintered magnesia with particles of 0.1-1mm, 5% of forsterite; 15% of fused magnesia with particle size <0.088mm; 8% of binder; 12% of additive; (wherein the raw material composition of binder and its weight Ratio is: sodium hexametaphosphate 20%, tripolyphosphate 4%, silicon micropowder 30%, secar-71 cement (pure calcium aluminate cement) 46%; The raw material composition and weight ratio of described additive are: powder particle size <0.088mm light burnt magnesia 50%, cordierite particle size <0.088mm 25%, silicon carbide particle size <0.088mm 25%).

[0022] b. Pre-mix fine powder raw materials, binders, and additives through a...

Embodiment 2

[0026] The magnesia gunning material for copper smelting furnace of this embodiment is prepared by the following steps:

[0027] a. First of all, take it by weight ratio under normal temperature conditions: 15% of sintered magnesia with particles of 3-5mm, 15% of sintered magnesia with particles of 1-3mm, and 15% of forsterite; sintered magnesia with particles of 0.1-1mm Magnesia 15%, forsterite 5%; particle size <0.088mm fused magnesia 15%; binder 5%; additive 15%. (wherein the raw material composition of binding agent and its weight ratio are: sodium hexametaphosphate 25%, tripolyphosphate 2%, silicon micropowder 25%, secar-71 cement (pure calcium aluminate cement) 48%; The raw material composition and weight ratio of the additive are as follows: 50% of calcined magnesia with a particle size of <0.088mm, 20% of talc with a particle size of <0.088mm, and 30% of silicon carbide with a particle size of <0.088mm.

[0028] b. Pre-mix fine powder raw materials, binders, and addit...

Embodiment 3

[0032] The magnesia gunning material for copper smelting furnace of this embodiment is prepared by the following steps:

[0033] a. Firstly, take by weight ratio under normal temperature conditions: 10% of sintered magnesia with particles of 3-5mm, 10% of forsterite; 10% of sintered magnesia with particles of 1-3mm, 15% of forsterite; 10% fused magnesia of 0.1-1mm, 5% sintered magnesia, 15% forsterite; 6% fused magnesia with particle size <0.088mm, 4% forsterite; 5% binder; 10% additive . (wherein the raw material composition of binding agent and its by weight ratio are: sodium hexametaphosphate 15%, tripolyphosphate 1%, silicon micropowder 30%, secar-71 cement (pure calcium aluminate cement) 54%; said additive The raw material composition and its weight ratio are: 50% of calcined magnesia with a particle size of <0.088mm, 35% of cordierite with a particle size of <0.088mm, and 15% of silicon carbide with a particle size of <0.088mm).

[0034] b. Pre-mix fine powder raw mate...

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Abstract

A magnesium gunning refractory used in copper smelting furnace can be used to gun and repair large area or partial erosive part of the furnace lining of nonferrous metals smelting furnace, the material thereof comprises aggregate, powder, binding agent and additive; the material of aggregate and powder comprises fused magnesite chrome sinter, fused magnesia, sintered magnesia and forsterite; the critical particle size of the aggregate is 0.1-5mm, and the particle size of the powder less than 0.088mm; the weight ratio is that fused magnesite chrome sinter 0-20%, sintered magnesia 10-30%, forsterite 0-20% for particle size of 3-5mm; sintered magnesia10-40%, forterite 10-40% for particle size of 1-3mm; fused magnesia 0-20%, sintered magnesia 5-20%, forsterite 5-20% for particle size of 0.1-1mm; fused magnesia 6-20%, forsterite 0-15% for particle size less than 0.088mm; binding agent 5%-15%; additive 6%-20%. The invention has the advantages of delaying the date of retirement, increasing the service life of the whole furnace lining, decreasing the repairing expenses and working intensity, and ensuring the continuity of production.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a magnesia gunning material for copper smelting furnaces suitable for hot repair of copper smelting furnaces such as converters and reverberatory furnaces. Background technique [0002] At present, the lining of copper smelting converters generally adopts directly bonded magnesia-chrome bricks and semi-rebonded magnesia-chrome bricks, and the lining of launching furnaces generally uses high-quality magnesia-chrome bricks. The damage area of ​​the former is concentrated on the upper and lower material openings and the material impact area, while the damage area of ​​the latter is concentrated on both sides of the furnace door and the straight wall. When this part is damaged, the current measure is to stop the furnace, and after cooling down, remove the damaged refractory lining and replace it with a new refractory lining, which causes discontinuity in production and affects the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/043
Inventor 翟耀杰陈卫敏朱维忠史兴华高峰张吉利郑建立张邦琪章菊申张建坤邓昆山张宇峰赵有林佟树韧王水运翟晓东
Owner 河南荣耀产业管理有限公司
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