Production process of steel slag micro-powder

A production process, steel slag micropowder technology, applied in the field of steel slag micropowder production technology, can solve the problems of large equipment investment, large floor area, complex process, etc., and achieve the effects of reduced investment, safe operation and simple process

Inactive Publication Date: 2011-08-31
TIANJIN SUMEIR ENVIRONMENTAL PROTECTION INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned traditional steel slag milling process is relatively complicated, consisting of two sets of drying and milling systems, with relatively large floor area, large equipment investment, and high energy consumption.
Since steel slag is a low-value-added product, the traditional plan layout has the disadvantages of large floor area, complicated process and large investment in equipment.

Method used

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  • Production process of steel slag micro-powder
  • Production process of steel slag micro-powder
  • Production process of steel slag micro-powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add the non-magnetic steel slag powder 1 with a water content of 5% and 20 mm into the vertical roller mill 2. After the vertical roller mill is ground, the fine powder content under the 325 mesh sieve reaches 15%, and the throughput of the mill per hour For 30 tons. After the material is ground, it enters the vibrating powder separator 3. Under the high-frequency and large-amplitude vibration of the vibrating drying powder separator 3, the steel slag powder on the large-grained steel slag falls off from the top, and the high-temperature air 8 sucked by the high-pressure induced draft fan 7 passes through. The air distribution plate 11 of the vibration drying powder separator 3 blows up the steel slag powder, and the steel slag powder is fluidized and dried in the vibration drying powder separator 3 . The classifier 12 on the top of the vibrating drying powder classifier 3 classifies the fine powder, and the qualified steel slag fine powder is collected in the bag filte...

Embodiment 2

[0025] Add the non-magnetic steel slag powder 1 with a water content of 5% and 10 mm into the horizontal roller mill 2. After the horizontal roller mill is ground, the fine powder content under the 325 mesh sieve reaches 20%, and the hourly mill throughput For 70 tons. After the material is ground, it enters the vibration drying powder separator 3. Under the high-frequency and large-amplitude vibration of the vibration drying powder separator 3, the steel slag fine powder on the large-grained steel slag falls off from the top, and the high-temperature air 8 sucked by the high-pressure induced draft fan 7 The steel slag powder is blown up by passing through the wind distribution plate 11 of the vibration drying powder separator 3, and the steel slag powder is fluidized and dried in the vibration drying powder separator 3. The classifier 12 on the top of the vibrating drying powder separator 3 classifies the fine powder, and the qualified steel slag fine powder enters the bag fi...

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Abstract

The invention relates to a production process of steel slag micro-powder, which comprises the following steps: enabling wet steel slag powder with water content of 5% and particle size of 0-20mm generated after crushing and magnetic separation of steel slag to enter a mill for powder milling, conveying obtained fine powder into a vibration drying and powder selecting machine for powder selection, enabling a micro-powder finished product to be discharged from an air outlet of the vibration drying and powder selecting machine and then enter a cloth bag dust collector for collection, then sending the micro-powder finished product into a finished product cabin, enabling the residual coarse powder to be discharged from a discharge port of the vibration drying and powder selecting machine, performing magnetic separation via a magnetic separation machine for removing iron powder, and then returning to the mill to perform the powder milling together with the wet steel slag powder. The production process has the benefits of shortening the process flow and reducing equipment investment. The closed loop circulation is adopted, the dust is little, and energy conservation and environment friendliness are realized.

Description

technical field [0001] The invention belongs to the treatment process of wet steel slag grinding, drying and powder selection, and relates to a production process of steel slag fine powder. Background technique [0002] Steel slag is the molten slag discharged during the steelmaking process. It is a melt formed at high temperature by adding minerals such as limestone, dolomite, silica and iron ore in order to remove impurities such as carbon, titanium, manganese, silicon and phosphorus in molten iron during the steelmaking process. The mineral phase of steel slag is mainly C 3 S and C 2 S, followed by RO phase, has good gelling properties. Steel slag powder is used as cement and concrete admixture, which can increase the strength of concrete in the later stage, improve the wear resistance, toughness, and seawater corrosion resistance of concrete, and increase the alkalinity of the liquid phase of concrete. Enhance the corrosion resistance of steel and other advantages. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06B22F9/04
CPCY02P10/20Y02W30/50
Inventor 马晓健李帅俊回勇巩政卢光段翠俭
Owner TIANJIN SUMEIR ENVIRONMENTAL PROTECTION INVESTMENT
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