Technique for treating pyrile cinder

A treatment process and technology for sulfuric acid residues, applied in the directions of magnetic separation, solid separation, wet separation, etc., can solve the problems of increased energy consumption, low recycling rate, reduced magnetic separation effect, etc., and achieve good economic and environmental benefits, The effect of reliable equipment operation and stable product quality

Inactive Publication Date: 2007-10-10
杨建华
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Problems solved by technology

[0005] However, due to the high temperature of the sulfuric acid slag coming out of the sulfuric acid production device from pyrite, generally between 900°C and 1000°C, the iron-containing substances in the sulfuric acid slag are easily oxidized at high temperatures, and the minerals containing strong magnetic magnetite The main black sulfuric acid slag turns into dark red hematite slag, the magnetism is greatly weakened, and the magnetic separation effect is reduced
In the prior art, due to high temperature oxidation, the sulfuric acid slag contains more hematite, and some technicians suggest that the sulfuric acid slag containing more hematite be magne

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  • Technique for treating pyrile cinder

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[0024] Example one:

[0025] 1. The sulfuric acid slag produced in the sulfuric acid production plant from pyrite concentrate is often at a temperature between 900°C and 1000°C. At the slag outlet, a closed steel pipe is connected, and the sulfuric acid slag is directly introduced into the special water through the steel pipe. It is cooled in a water-sealed cooling pool, and the steel pipe is plunged into the water 300mm, so that the temperature is quickly reduced to below 100°C, which is actually 80°C; to prevent the iron minerals in the sulfate slag from being oxidized at high temperatures.

[0026] 2. Pump the cooled sulfuric acid slag slurry to a magnetic separator with a magnetic field strength of 1200Oc (Oersteds) for a rough magnetic separation (field strength of 1200Qc); transport the primary concentrate to the selection In the magnetic separator, a selective magnetic separation (field strength 1100Qc) is carried out. Of course, if the particle size of the sulphuric acid s...

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Abstract

A process for treating the sulfuric acid dregs generated by preparing sulfuric acid from troilite concentrate includes such steps as delivering said sulfuric acid dregs via a sealed pipeline into a water sealed water pool, quick cooling, primary magnetic separating by a weak magnetic field (1100-1200 Oc), secondary magnetic separating by another weak magnetic field (1000-1100 Oc), and final separation of tailings by the third weak magnetic field (1200-1500 Oc) or a shaking table. It has high recovery rate of Fe ore.

Description

Technical field [0001] The invention relates to a sulfuric acid slag processing technology for recovering raw materials suitable for ironmaking from solid waste residues (sulfuric acid slags for short) obtained from pyrite concentrates. Background technique [0002] Because sulphuric acid slag is the solid waste slag produced by pyrite sulphuric acid, in the past, it was mostly used directly to find remote storage or to send a small amount to cement plants as additives. In recent years, due to the rapid development of the iron and steel industry and international and domestic iron ore With strong demand and high price, sulphuric acid slag has received widespread attention due to its higher iron content and its ability to be processed as raw materials for ironmaking. [0003] Due to the differences in the acid production process and pyrite composition of the sulphuric acid slag in various places, the properties of various sulphuric acid slag are different. Some sulphuric acid slag...

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Application Information

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IPC IPC(8): B03C1/02B03B7/00B03B1/00
Inventor 杨建华魏平袁国红
Owner 杨建华
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