Method for removing paint, rust and oil from waste iron and steel before briquetting

A steel and waste technology, which is applied in the field of paint, rust and oil removal before waste steel briquetting, can solve the problems of not very obvious effect, increase the risk of steel briquetting operation, cumbersome operation, etc., and achieve a significant effect of improving the wall hanging rate , Improve the effect of uniformity

Inactive Publication Date: 2017-06-09
当涂县宏宇金属炉料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method of rust, oil and paint removal is not very effective, and the operation is cumbersome, which increases the operational risk of steel briquetting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for removing paint, rust and oil before briquetting waste steel includes the following operation steps:

[0016] (1) Put the scrap steel into the shredder and stop cutting when the length of the largest fragment is less than 15mm;

[0017] (2) Put the fragments into the container, and pour the paint remover into it, so that all the pieces are immersed in the paint remover, wait until the fragments are soaked for 20 minutes, then empty the paint remover, where the paint remover has the following weight The components are made of: 25 parts of glycidyl methacrylate, 14 parts of dimethyl phosphite, 0.1 part of phosphorous acid, 5 parts of neopentyl glycol, 4 parts of 1-chloro-2-nitrobenzene, dihydrate 1 part of sodium molybdate, 140 parts of absolute ethanol, 200 parts of water;

[0018] (3) Pour the rust and oil removal liquid into the container so that all the fragments are immersed in the rust and oil removal liquid. After the fragments are soaked for 50 minutes, drai...

Embodiment 2

[0022] A method for removing paint, rust and oil before briquetting waste steel includes the following operation steps:

[0023] (1) Put the scrap steel into the shredder and stop cutting when the length of the largest fragment is less than 15mm;

[0024] (2) Put the fragments into the container, and pour the paint remover into it, so that all the pieces are soaked in the paint remover, wait until the fragments are soaked for 25 minutes, then drain the paint remover, where the paint remover has the following weight The components are made of: 27 parts of glycidyl methacrylate, 15 parts of dimethyl phosphite, 0.2 part of phosphorous acid, 6 parts of neopentyl glycol, 6 parts of 1-chloro-2-nitrobenzene, dihydrate 2 parts of sodium molybdate, 145 parts of absolute ethanol, 225 parts of water;

[0025] (3) Pour the rust and oil removal liquid into the container so that all the fragments are immersed in the rust and oil removal liquid. After the fragments are soaked for 55 minutes, drain...

Embodiment 3

[0029] A method for removing paint, rust and oil before briquetting waste steel includes the following operation steps:

[0030] (1) Put the scrap steel into the shredder and stop cutting when the length of the largest fragment is less than 15mm;

[0031] (2) Put the fragments into the container, and pour the paint remover into it, so that all the pieces are soaked in the paint remover, wait until the fragments are soaked for 30 minutes, then empty the paint remover, where the paint remover is weighed by the following weight Parts of the components are made: 30 parts glycidyl methacrylate, 16 parts dimethyl phosphite, 0.3 parts phosphorous acid, 7 parts neopentyl glycol, 8 parts 1-chloro-2-nitrobenzene, dihydrate 3 parts of sodium molybdate, 150 parts of absolute ethanol, 250 parts of water;

[0032] (3) Pour the rust and oil removal liquid into the container so that all the fragments are soaked in the rust and oil removal liquid. After the fragments are soaked for 60 minutes, drain...

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PUM

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Abstract

The invention discloses a method for removing paint, rust and oil from waste iron and steel before briquetting. The method comprises the following operating steps of (1) putting the waste iron and steel in a chopping mill; and stopping cutting when the lengths of the largest fragments are shorter than 15mm; (2) putting the cut broken sheets in a container, pouring paint removing liquid in the container, so that all the broken sheets are soaked in the poured paint removing liquid, and after the broken sheets are soaked for 20-30 min, draining the paint removing liquid; and (3) pouring rust and oil removing liquid in the container, so that all the broken sheets are respectively soaked in the rust and oil removing liquid, and after the broken sheets are soaked for 50-60 min, draining the rust and oil removing liquid. The method for removing paint, rust and oil waste from iron and steel provided by the invention is notable in effect, and can effectively remove a chemical paint film, fat and rust stains on the surface of the iron and steel, so that powerful guarantee is provided for the safe briquetting.

Description

Technical field [0001] The invention belongs to the field of waste steel processing, and specifically designs a method for removing paint, rust and oil before briquetting of waste steel. Background technique [0002] Scrap steel refers to scrapped steel products (including semi-finished products) and steel parts such as machinery, equipment, appliances, structural parts, structures and daily necessities. It is the basic raw material for electric arc furnace steelmaking, and its consumption accounts for about 70-90% of steel materials. For the oxygen converter, scrap steel is both a metal material and a coolant. Scrap steel is the source of secondary steelmaking. Half of the world's steel production comes from scrap steel. Scrap steel is a kind of energy-carrying and environmentally friendly resource. Compared with steelmaking after ironmaking with ore, direct steelmaking with scrap can save energy by 60% and reduce waste emissions by 80%. It is improved by removing and process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08
CPCC23G1/083C23G1/088
Inventor 芮德发
Owner 当涂县宏宇金属炉料有限责任公司
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