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Method for reducing preparing of copper and chromium containing abrasion resisting cast iron through copper slag fusion and dilution

A technology of wear-resistant cast iron and depleted copper, applied in the field of metallurgy, can solve the problems of long process and achieve the effect of short construction period, broad application prospect and low cost

Active Publication Date: 2019-07-12
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The patent with the application number 201410345197.2 proposes a method for reducing copper slag to smelt copper-containing antibacterial stainless steel. The copper slag is moderately depleted and then deeply reduced to obtain a copper-iron alloy. Oxygen bottom blowing copper slag and other copper slag with good copper content; the desulfurizer on it is involved in molten iron for mixed desulfurization, but it does not involve the field of copper slag depletion; the patent application number 201710885434.8 proposes a wear-resistant cast iron material The preparation method involves mixing various raw materials and placing them in a melting furnace, which does not involve the secondary utilization of waste slag

Method used

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  • Method for reducing preparing of copper and chromium containing abrasion resisting cast iron through copper slag fusion and dilution
  • Method for reducing preparing of copper and chromium containing abrasion resisting cast iron through copper slag fusion and dilution
  • Method for reducing preparing of copper and chromium containing abrasion resisting cast iron through copper slag fusion and dilution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Process such asfigure 1 shown;

[0050] The molten copper slag after the depletion treatment is introduced into the reduction furnace through the chute as a raw material melt. The temperature of the molten copper slag after the depletion treatment is 1200 °C; the iron grade TFe of the molten copper slag after the depletion treatment is 45.68%, containing FeO 45.14%, Cu 0.31%, Zn 1.68%, S 0.13%, Al by mass percentage 2 o 3 4.32%, CaO 1.68%, MgO 1.45%, SiO 2 21.56%;

[0051] Raise the temperature of the raw material melt to 1400°C through the reduction furnace, insert the stirring paddle into the center of the raw material melt through the lifting device, and the height difference between the stirring paddle and the liquid surface of the raw material melt is 1 / 2 of the total height of the raw material melt; then start Stirring paddle, the raw material melt is stirred by the stirring paddle, and a molten pool with centrifugal vortex is formed in the reduction furnace;...

Embodiment 2

[0055] Method is with embodiment 1, and difference is:

[0056] (1) The temperature of the molten copper slag after depletion treatment is 1250°C; the iron grade TFe of the molten copper slag after depletion treatment is 44.96%, containing FeO 46.78%, Cu 0.32%, Zn 1.02% by mass percentage, S 0.11%, Al 2 o 3 4.33%, CaO 1.75%, MgO 1.68%, SiO 2 22.57%;

[0057] (2) The temperature of the raw material melt is raised to 1430°C, and the height difference between the stirring paddle and the liquid surface of the raw material melt is 1 / 3 of the total height of the raw material melt; the rotating speed of the stirring paddle is 150r / min;

[0058] (3) The consumption of calcium oxide and coking coal is respectively 40% of the total mass of raw material melt; 45min of vortex reduction smelting;

[0059] (4) Copper-chromium-containing wear-resistant cast iron contains Cu 0.72%, Cr 13.15%, and S 0.05% by mass percentage.

Embodiment 3

[0061] Method is with embodiment 1, and difference is:

[0062] (1) The temperature of the molten copper slag after depletion treatment is 1250°C; the iron grade of the molten copper slag after depletion treatment is TFe 44.68, containing FeO 45.32%, Cu 0.33%, Zn 1.12%, S 0.15%, Al 2 o 3 4.28%, CaO 1.69%, MgO 1.71%, SiO 2 23.57%;

[0063] (2) The temperature of the raw material melt is raised to 1450°C, the height difference between the stirring paddle and the liquid surface of the raw material melt is 1 / 3 of the total height of the raw material melt; the rotating speed of the stirring paddle is 100r / min;

[0064] (3) The consumption of calcium oxide and coking coal is respectively 35% of the total mass of the raw material melt; vortex reduction smelting for 30min;

[0065] (4) Copper-chromium-containing wear-resistant cast iron contains Cu 0.72%, Cr 13.15%, and S 0.05% by mass percentage.

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Abstract

A method for reducing preparing of copper and chromium containing abrasion resisting cast iron through copper slag fusion and dilution is conducted according to the following steps that firstly, fusion copper slag with the temperature being 1,200-1,250 DEG C is subjected to dilution treatment, the fusion slag left after sulfonium removal serves as raw material melt, or the fusion copper slag obtained after dilution treatment serves as raw material melt; secondly, the temperature is increased to 1,400-1,450 DEG C, a stirring paddle is used for stirring, and a molten bath with a centrifugal vortex is formed in a reducing furnace; thirdly, a reducing agent is sprayed for vortex reducing and smelting, and slag is discharged; and fourthly, a chromium-iron alloy is added for tempering and smelting, and casting is conducted. The method is rapid and thorough in reaction, and the construction period process is short; and the technology is simple, the equipment investment is low, energy saving and environment friendliness are achieved, cost is low, and high economic value is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for preparing wear-resistant cast iron containing copper and chromium by reducing molten depleted copper slag. Background technique [0002] With the rapid development of the copper smelting process, the strong oxidation melting process is widely used due to its advantages of fast smelting stage, high strength, high-grade copper matte and high iron removal rate; the copper matte will be mechanically included and chemically dissolved. Exist in copper slag, while high-grade copper-sulfur is produced, the grade of copper matte mixed in the slag is also high, resulting in a high copper content in the slag. After depletion treatment, the copper content in the waste slag is still as high as 0.4~ 0.8%; the high iron removal rate makes the copper matte grade high and at the same time almost all the iron is concentrated in the slag, up to 40-50%, and the copper and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/08C22C37/06C22B7/04
CPCC22B7/04C22C33/08C22C37/06Y02P10/20
Inventor 张廷安豆志河牛丽萍张子木刘燕张保敬赵秋月吕国志傅大学张伟光赫冀成
Owner NORTHEASTERN UNIV LIAONING
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