Method for treating steel slag tailings subjected to magnetic separation

A treatment method and steel slag technology, which is applied in the field of comprehensive utilization of solid waste resources in the metallurgical industry, can solve the problems of restricting the use of steel slag tailings, the loss of iron resources in slag, and the high consumption of grinding bodies, so as to increase the added value of products and reduce grinding costs. , Improve the efficiency of powder selection

Inactive Publication Date: 2011-04-20
TIANJIN SUMEIR ENVIRONMENTAL PROTECTION INVESTMENT
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Problems solved by technology

However, because steel slag tailings still contain about 1-3% metallic iron, during the grinding process of raw materials, iron will be enriched in the mill, resulting in high consumption of grinding bodies and high useless power consumption, which seriously restricts steel slag tailings. At the same time, it also caused the loss of iron resources in the slag

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  • Method for treating steel slag tailings subjected to magnetic separation
  • Method for treating steel slag tailings subjected to magnetic separation

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Embodiment Construction

[0021] The steel slag tailings with a metal iron content of 1-3% and a particle size of 0-20 mm are lifted into the drying and sorting device, and the material is constantly vibrating and jumping in the device with the hot air of 200-800 °C blown by the hot blast stove Mixing to produce fluidization, the fine powder mixed with hot air will produce flash evaporation, and the qualified fine powder will be dried in a few seconds, the dried fine powder will rise with the flue gas, and enter the cloth bag after classification The dust collector is collected, and then transported into the finished product warehouse. After the coarse powder is magnetically separated, the slag steel and slag fine powder in the powder are recovered. The non-magnetic coarse powder after magnetic separation enters the mill to be ground, and the ground material is mixed with steel slag and tailings raw materials, and then baked and separated magnetically, and the cycle continues.

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Abstract

The invention discloses a method for treating steel slag tailings subjected to magnetic separation. By the method, steel slag micro-powder of which the specific surface area is more than 400m<2> / kg can be produced in a treatment mode of drying the steel slag tailings, carrying out powder selection and magnetic separation, adding abrasive dust for milling and circulating repeatedly, the recovery rate of iron resources in recovered slag can be improved and the powder milling cost of the steel slag micro-powder can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of solid waste resources in the metallurgical industry, and relates to a treatment method for steel slag tailings, the solid waste produced after steelmaking steel slag is crushed and magnetically separated to remove iron. Background technique [0002] Steel slag is the molten slag produced in the steelmaking process. At present, the resource utilization of steel slag focuses on the recovery of iron. The steel slag produced by the converter or electric furnace is firstly subjected to heat treatment, and then the steel slag is pulled to the processing site for crushing and magnetic separation to produce two kinds of products, one is magnetic steel slag powder and the other is non-magnetic steel slag powder. After magnetic separation, the slag containing magnetic steel enters the ball mill for water separation, selects granular steel and iron fine powder, recovers metallic iron in ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C21B3/04
CPCY02P10/20Y02W30/50
Inventor 马晓健回勇巩政卢光段翠俭
Owner TIANJIN SUMEIR ENVIRONMENTAL PROTECTION INVESTMENT
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