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A method for making foamed slag for electric arc furnace steelmaking by using waste plastics and waste rubber

A waste rubber and waste plastic technology, applied in the field of steelmaking, can solve problems such as harmful to human body, unfavorable environmental protection, low-density characteristics, etc., and achieve the effects of reducing pollution, reducing the amount of iron oxide, and improving performance

Active Publication Date: 2018-11-23
HENAN TAIHANG QUANLI HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low-density characteristics of a large number of waste plastic products and the aromatic hydrocarbons that pollute the environment when incinerated, they are very harmful to the human body, so it is not conducive to environmental protection
Other polymeric materials such as waste tires also pose a huge environmental challenge

Method used

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  • A method for making foamed slag for electric arc furnace steelmaking by using waste plastics and waste rubber
  • A method for making foamed slag for electric arc furnace steelmaking by using waste plastics and waste rubber
  • A method for making foamed slag for electric arc furnace steelmaking by using waste plastics and waste rubber

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Embodiment 1

[0020] The method of utilizing waste plastics and waste rubber in this embodiment to make foamed slag for electric arc furnace steelmaking, the steps are as follows:

[0021] (1) Crushing of waste plastics and waste rubber:

[0022] The first step is to use tire wire drawing to perform steel wire drawing operation. The tire wire drawing machine: the model is XY--P800 or XY--P1200. Its function is to pull out the whole steel wire in the steel wire, and the side of the tire will tear the rubber due to the effect of the pull mouth, so the steel wire and the tire rubber are separated smoothly, and the remaining tire rubber is then used XY--C800 Type tire cutting machine cut into 5 × 5mm small fragments, then can be blown into the furnace;

[0023] The second step is to use a tire cutting machine to cut the tire into pieces. The model of the tire cutting machine is: XY--C800 or XY--C1200; its function is to cut off various tire rubber blocks and strips arbitrarily. It is suitable...

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Abstract

The invention discloses a method for making foaming slag for electric arc furnace steelmaking using waste plastic and waste rubber, wherein the steps are as follows: The waste plastic and the waste rubber are to be crushed. When the temperature of the slag reaches 1600-1650oC and the limestone is completely dissolved, the pulverized waste plastic and waste rubber and metallurgical grade coke are injected into the slag. At this time, there is a large amount of FeO in the slag layer, and then FeO is reduced by waste plastics and waste rubber and C in metallurgical grade coke to produce Fe and CO gas, and CO gas is trapped by slag to form foam slag. In order to produce a large amount of foaming slag, oxygen-enriched operation is carried out for feeding oxygen. When the O2 content in the slag exceeds the CO equilibrium curve, excessive CO gas is generated. After the CO gas is captured by the slag, a large amount of foam slag is formed. By mixing the waste plastics, waste rubber and metallurgical grade coke, the foaming slag is characterized by improvement of the electric arc furnace steelmaking efficiency, cost reduction of electric arc furnace steel and less environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a method for making foam slag for electric arc furnace steelmaking by utilizing waste plastics and waste rubber. Background technique [0002] At present, my country's plastic products are nearly 10 million tons, and it is still growing at an annual growth rate of 13%. Therefore, the amount of waste plastics is also increasing sharply. At present, a large amount of waste plastics are piled up everywhere in the society, forming the so-called "white pollution", and the effective treatment of waste organic polymer materials (waste plastics) is the most troublesome and important issue facing countries all over the world today. Such polymeric materials are usually made from petrochemical materials that cannot be renewed. In 2006, only 15.9% of the total plastic products were recycled in Australia. In addition, about 1.5 million tons of plastic products were discarded....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52
CPCC21C5/52C21C2200/00Y02P10/20
Inventor 黄全利王官振花皑
Owner HENAN TAIHANG QUANLI HEAVY IND
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