Process for treating steel slag by using self grinding technology
A technical treatment and steel slag technology, which is applied in the field of steel slag treatment, can solve the problems of local dispersion of process, dispersion of plant construction, large waste particle size, etc., and achieve the effect of improving product quality, less number of host machines and high production efficiency
Inactive Publication Date: 2005-06-22
庞慧鑫
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Problems solved by technology
Its disadvantages are: 1. This kind of process is partially scattered and complicated
At the same time, the particle size of the waste after this process is relatively large, which brings the difficulty of re-breaking and regrinding to the comprehensive utilization of steel slag and increases the cost, which increases the cost of comprehensive utilization of steel slag and makes it difficult to develop
2. The construction of factories is scattered, covering a large area and consuming waste water resources; dust and tailings are piled up randomly, and magnetic separation waste water is discharged to pollute the environment
3. Steel slag is a good building material with activity, while the traditional wet grinding, the treated tailings lose their activity due to chemical reaction with water, which reduces the use value
Method used
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[0012] see figure 1 , is a process flow diagram of the present invention. The present invention adopts self-grinding technology to process steel slag technology, and its preferred technology is:
[0013] 1. Raw material: steel slag particle size 0-800mm.
[0014] 2. Send it to dry-type autogenous mill for grinding, adopt wind mechanical thrust to discharge ore, and electrostatic dust removal: the main mill adopts a modified dry-type self-mill of Φ4000×1400mm, and the improvement method is in the form of a mill grid plate, and the ore discharge method, Wind mine discharge, electrostatic dust removal facilities. The grid plate is used to separate and remove the slag with a particle size below 25mm. Wind pressure: 322MPa, air volume: 30000m 3 / h, use the concentric circle dust collector to collect the slag powder with a particle size of 0-0.5mm.
[0015] 3. Screening: Use double-arm vibrating screen to sort according to particle size 0-3mm and 3-25m.
[0016] 4. Magnetic sep...
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Abstract
The grinding treatment process of the present invention is suitable for various kinds steel slag, such as electric furnace steel slag, converter steel slag, etc. It includes the following continuous technological steps: providing steel stag material of granularity up to 800 mm; pulverizing in dry pulverizing machine with pneumatic mechanism to discharge and electrostatic dust collection; sieving into different granularity components; and magnetic dressing to separate magnetic steel powder, granular steel and non-magnetic tail powder and granular slag. The present invention has continuous process, high production efficiency and other advantages.
Description
[technical field] [0001] The invention relates to a steel slag processing method, which is a steel slag processing process using self-grinding technology, which is suitable for processing various steel slags, such as electric furnace steel slag, converter steel slag and the like. [Background technique] [0002] In the prior art, iron and steel enterprises will produce a large amount of steel slag during the production process. The existing steel slag treatment process is mainly crushing-screening-large dry separation or wet grinding-classification-wet magnetic separation. Its shortcoming is: 1, this kind of technology partly scattered, complicated. Due to the influence of large slag iron and steel balls in the steel slag, the crushing ratio of each section is small, and the final product has a large particle size. Generally, the particle size of the waste residue discharged from the primary treatment plant is 200-350mm, and it needs to enter the secondary treatment plant f...
Claims
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IPC IPC(8): C04B5/00C21B3/04C21B5/00
CPCY02W30/50
Inventor 庞慧鑫严晓东
Owner 庞慧鑫