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A method for energy-saving smelting of high-chromium wear-resistant cast iron

A technology of anti-wear cast iron and high chromium, applied in the field of metallurgy, can solve the problems of difficulty in obtaining high-purity molten iron, inability to produce smelting oxide slag and reduction slag, and achieve the effects of shortening melting time, simple structure of smelting equipment, and reducing power

Active Publication Date: 2016-08-24
安徽中建材开源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an energy-saving smelting method for high-chromium wear-resistant cast iron in view of the above defects, which overcomes the difficulty in implementing the metallurgical process of the oxidation period and the reduction period in the melting process of the prior art, and cannot produce the oxidation required for smelting. slag and reducing slag, and it is difficult to obtain relatively pure molten iron

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for energy-saving smelting of high-chromium wear-resistant cast iron, the steps are:

[0043] (1) Furnace cleaning: before starting the melting operation, clean up the molten metal in the furnace;

[0044] (2) Smelting: adding steel scrap, 75wt% ferrosilicon, 65wt% ferromanganese, 60wt% ferrochrome, 60wt% ferromolybdenum, and electrolytic copper into an intermediate frequency induction furnace for smelting;

[0045] (3) heating up: step (2) is heated up to 1340 ℃, and the content of iron oxide is controlled at 0.5wt%;

[0046] (4) heat preservation: after the molten iron in the step (3) is heated up to 1520°C, the induction furnace is adjusted to the heat preservation state, and the molten iron is left to stand for 10 minutes to form the former molten iron, and the 30ppm of the total oxygen and hydrogen content is controlled with a gas analyzer;

[0047] (5) Casting: pour the molten iron in step (4) into the casting cavity, set the casting temperature to 1380°...

Embodiment 2

[0052] A method for energy-saving smelting of high-chromium wear-resistant cast iron, the steps are:

[0053] (1) Furnace cleaning: before starting the melting operation, clean up the molten metal in the furnace;

[0054] (2) Smelting: adding steel scrap, 75wt% ferrosilicon, 65wt% ferromanganese, 60wt% ferrochrome, 60wt% ferromolybdenum, and electrolytic copper into an intermediate frequency induction furnace for smelting;

[0055] (3) heating up: step (2) is heated up to 1350 ℃, and the content of iron oxide is controlled at 0.4wt%;

[0056] (4) heat preservation: after the molten iron in the step (3) is heated up to 1530°C, the induction furnace is adjusted to the heat preservation state, and the molten iron is left to stand for 12 minutes to form the former molten iron, and the 20ppm of the total oxygen and hydrogen content is controlled with a gas analyzer;

[0057] (5) Casting: pour the molten iron in step (4) into the casting cavity, set the casting temperature as 1380°...

Embodiment 3

[0062] A method for energy-saving smelting of high-chromium wear-resistant cast iron, the steps are:

[0063] (1) Furnace cleaning: before starting the melting operation, clean up the molten metal in the furnace;

[0064] (2) Smelting: adding steel scrap, 75wt% ferrosilicon, 65wt% ferromanganese, 60wt% ferrochrome, 60wt% ferromolybdenum, and electrolytic copper into an intermediate frequency induction furnace for smelting;

[0065] (3) heating up: step (2) is heated up to 1360 ℃, and the content of iron oxide is controlled at 0.3wt%;

[0066] (4) heat preservation: after the molten iron in the step (3) is heated up to 1520°C, the induction furnace is adjusted to the heat preservation state, and the molten iron is left to stand for 12 minutes to form the former molten iron, and the 25ppm of the total oxygen and hydrogen content is controlled with a gas analyzer;

[0067] (5) Casting: pour the molten iron in step (4) into the casting cavity, set the casting temperature as 1380°C,...

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Abstract

The invention belongs to the field of metallurgy, and in particular relates to a method for energy-saving smelting of high-chromium wear-resistant cast iron. The specific steps of smelting are: furnace cleaning, smelting, heating, heat preservation and casting. It overcomes the defects of the prior art that it is difficult to implement the metallurgical process of the oxidation period and the reduction period in the melting process, and the oxide slag and reduction slag required for smelting cannot be produced, and at the same time, it is difficult to obtain relatively pure molten iron. The invention has the advantages of high molten iron quality, fast melting speed, low melting cost, long service life of the melting furnace lining, simple operation, environmental friendliness and the like.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for energy-saving smelting of high-chromium wear-resistant cast iron. Background technique [0002] Smelting is the primary link in the production of wear-resistant iron castings, and it is also one of the key production processes that determine the metallurgical quality of wear-resistant iron castings. Its basic task is to provide high-quality molten iron that meets the quality requirements of wear-resistant iron castings such as composition, temperature and metallurgical quality indicators. [0003] The medium frequency induction furnace adopts the batch material melting method, that is, the molten metal is poured out for each furnace, and then the furnace is filled with material again, and the melting operation starts without the remaining molten metal. Using a reasonable ratio of power supply and electric furnace device can make full use of the output power of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/08C22C37/10C22C37/06
Inventor 汪德发
Owner 安徽中建材开源新材料科技有限公司