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Wet type treatment process for stainless steel slag

A technology of stainless steel slag and wet treatment, which is applied in the direction of process efficiency improvement, wet separation, solid separation, etc., can solve the problems of environmental pollution such as discharge, and achieve the effect of solving social problems

Inactive Publication Date: 2012-12-26
庞兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The centralized treatment mode of stainless steel slag fundamentally solves the worries of steelmaking production, and solves the social problems caused by the emission and pollution of the environment caused by irregular disposal methods such as steel slag takeaway in the past

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 wet treatment of electric furnace slag

[0022] 1. Use lifting equipment such as a forklift to turn the electric furnace slag into the raw material warehouse.

[0023] 2. Pre-screen through the grid sieve, and the large slag on the sieve > 250mm is crushed by the vibrating pick of the crawler hydraulic excavator and then enters the raw material bin; the slag under the sieve < 250mm is sent to the jaw crusher through the belt conveyor After primary breaking, it enters the vibrating screen for screening.

[0024] 3. After sieving, the material > 40mm on the sieve is sent to the dry rod mill through the feeder and then enters the vibrating screen. The lumps > 25mm on the sieve are separated from the stainless steel slag by this processing line. Class A metals.

[0025] 4. The material The 7mm sieve material is the Class B metal separated from the stainless steel slag by this processing line.

[0026] 5. After spiral classification and re-selection by jig ...

Embodiment 2

[0029] Example 2 Converter slag wet treatment

[0030] 1. The converter slag is transported from the raw material storage yard to the converter slag raw material workshop, and is tipped into the silo by lifting equipment such as forklifts.

[0031] 2. After being crushed by the jaw crusher through the feeder and belt conveyor, it is sent to the cylinder sieve for screening.

[0032] 3. After the fine powder slag under the sieve surface is selected by the magnetic separator, the magnetic metal is selected, and then the humidity is adjusted by adding water to the mixer. After mixing, it is sent to the stockyard as roadbed and cement raw materials for export.

[0033] 4. The converter coarse slag on the screen surface is returned to the raw material site by a belt conveyor, mixed with the electric furnace / refining slag, and then put into the electric furnace / refining slag processing line for processing.

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Abstract

The invention relates to a wet type treatment process for stainless steel slag, which belongs to the field of peripheral recycling of stainless steel and achieves the purposes of resource recycling of turning harm into a benefit and waste into wealth on the basis of taking full advantage of a slag resource. The wet type treatment process for the stainless steel slag adopts advanced and reliable slag and steel separation equipment, recovers metal and steel slag resources in the stainless steel slag to the greatest extent, takes full advantage of the slag, and turns the harm into the benefit and the waste into the wealth. With the adoption of a centralized treatment mode for stainless steel slag, the subsequent trouble in steel manufacturing is overcome fundamentally, and the social problem of environmental pollution arising from the steel slag discharge due to nonstandard treatment modes of the steel slag, such as selling, is solved. The treatment process for the stainless steel slag comprises the steps that the stainless steel converter slag and electric furnace / refining slag are crushed, sieved, recrushed, reselected and magnetically separated, and subjected to sewage concentration, slag slurry dehydration and detoxification of circulation process water. In consideration of the particularity of the converter slag and for the convenience of comprehensive utilization of tailings, the treatment process is divided into a converter slag production treatment line and an electric furnace / refining slag production treatment line.

Description

technical field [0001] The invention relates to a stainless steel slag wet treatment process, which belongs to the field of stainless steel peripheral recycling. The process achieves the purpose of resource regeneration and utilization of turning harm into benefit and turning waste into treasure on the basis of fully utilizing slag resources. Background technique [0002] Stainless steel slag is a derivative of the steelmaking process. At present, there is no mature and reliable treatment process in China. Adopting advanced and reliable slag and steel separation treatment technology can not only effectively separate the precious metals such as chromium and nickel contained in the recycled slag and stainless steel scrap, but also greatly reduce the cost of steelmaking. At the same time, tailings resources can be recycled and utilized, solving the problem of Cr in stainless steel slag 6+ The problem of excessive ion emission polluting the environment. [0003] The stainless ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/04B03B7/00C22B7/00
CPCY02P10/20
Inventor 庞兵
Owner 庞兵
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