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Steel industry waste residue contaminant comprehensive treatment method

A comprehensive treatment and iron and steel industry technology, applied in the direction of improving process efficiency, etc., can solve the problems of increasing lime consumption, large heat consumption, and increasing the burden of high-alkalinity slag, so as to achieve high energy consumption costs, reduce consumption, and improve utilization high effect

Inactive Publication Date: 2017-07-18
王冰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials are low-alkalinity substances, which will increase the burden of high-alkalinity slag produced by the converter in the later stage, increase lime consumption, and consume a lot of heat at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A comprehensive treatment method for iron and steel industry waste residue pollutants, comprising the following steps:

[0021] a) Crush the steel slag to 5 mesh, wash it with distilled water, dry it, and reserve it; grind the iron tailings to 200 mesh, and set it aside; then, according to the mass percentage of each raw material: steel slag 45%, iron tailing 35%, Binding agent 5%, select steel slag, iron tailings and binding agent, mix, obtain composite material, standby;

[0022] b) Spread the composite material in a container and put it into a high-temperature resistance furnace for roasting, raise the temperature at 4°C / min to 100°C, and keep it for 60 minutes; then raise the temperature at 10°C / min to 700°C, keep it for 1 hour, and cool it naturally to room temperature to get Adsorbent material;

[0023] c) Use the adsorption material to grind into powder according to the weight ratio, make pellets, the particle size is controlled at 150 mesh, and then enter the p...

Embodiment 2

[0029] A comprehensive treatment method for iron and steel industry waste residue pollutants, comprising the following steps:

[0030] a) Crush the steel slag to 10 mesh, wash it with distilled water, dry it, and reserve it; grind the iron tailings to 200 mesh, and set it aside; then, according to the mass percentage of each raw material: steel slag 55%, iron tailing 5%, Binder 15%, select steel slag, iron tailings and binder, mix, obtain composite material, standby;

[0031] b) Spread the composite material in a container and put it into a high-temperature resistance furnace for roasting, raise the temperature at 8°C / min to 100°C, and keep it for 60 minutes; then raise the temperature to 800°C at 12°C / min, keep it for 1.5h, and cool it down to room temperature naturally. Get the adsorption material;

[0032]c) Use the adsorption material to grind into powder according to the weight ratio, and make pellets with a particle size of 250 mesh, and then enter the pelletizing disc ...

Embodiment 3

[0038] A comprehensive treatment method for iron and steel industry waste residue pollutants, comprising the following steps:

[0039] a) Crush the steel slag to 7 mesh, wash it with distilled water, dry it, and reserve it; grind the iron tailings to 200 mesh, and set it aside; then, according to the mass percentage of each raw material: steel slag 50%, iron tailing 340%, 10% binder, select steel slag, iron tailings and binder, mix to obtain composite material, and set aside;

[0040] b) Spread the composite material in a container and put it into a high-temperature resistance furnace for roasting, raise the temperature at 8°C / min to 100°C, and keep it for 60 minutes; then raise the temperature to 750°C at 11°C / min, keep it for 1.2h, and cool it down to room temperature naturally. Get the adsorption material;

[0041] c) Grind the adsorbent material into powder according to the weight ratio, make pellets, the particle size is controlled at 200 mesh, and then enter the pelleti...

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Abstract

The invention discloses a steel industry waste residue contaminant comprehensive treatment method. The method comprises following steps: steel slag is broken to 5 meshes to 10 meshes and is washed through distilled water and dried, and standby application is carried out; a composite is flatly laid in a container and is put into a high-temperature resistance furnace to be roasted to obtain an absorbing material; the absorbing material is ground according to the weight ratio to powder, and a carbon-bearing pellet is manufactured; one or multiple of soft coal, brown coal, lime powder, coal slime, coal gangue and saw powder are mixed to obtain cladding powder, the carbon-bearing pellet and the cladding powder are put into the other pelletizing disc, a bonding agent is added, then, continuous pelletizing is carried out, the composite carbon-bearing pellet enters a chain belt type roasting machine to be subject to high-temperature reduction roasting, and in the chain belt type roasting machine, the temperature rises to 1450 DEG C to 1650 DEG C within 7 to 15 minutes, the carbon-bearing pellet is subject to 2.5-hour roasting, and the pellet is obtained. The method is economical, applicable, small in material loss, good in effect, low in energy consumption and low in production cost and facilitates environment friendliness.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a comprehensive treatment method for iron and steel industry waste residue pollutants. Background technique [0002] Steel slag is the solid waste produced by converter (electric furnace) steelmaking. After crushing, screening, and magnetic separation, the iron-containing material is used as slag iron for steelmaking, and the remaining tailings can be used as sintering materials and building materials. Among them, using steel slag tailings to produce steel slag fine powder is a feasible utilization method. Many domestic enterprises mix steel slag fine powder and slag fine powder to prepare steel slag composite fine powder, which is used in cement and concrete. However, since the slag powder prepared from high-titanium blast furnace slag contains almost no active mineral components, even if it is mixed with steel slag powder, it cannot improve the activity of steel slag a...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B1/02C22B7/04
CPCC22B1/02C22B1/2406C22B7/001C22B7/04Y02P10/20
Inventor 王冰
Owner 王冰
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