CN1089191A

CN1089191A - Magnetic separating, processing and recovery system for steel slag

Info

Publication number: CN1089191A
Application number: CN 93104386
Authority: CN
Inventors: 周绍宪
Original assignee: Design Institute Of Angang Mining Co; Angang Steel Co Ltd
Current assignee: Design Institute Of Angang Mining Co; Angang Steel Co Ltd
Priority date: 1993-04-12
Filing date: 1993-04-12
Publication date: 1994-07-13

Abstract

A kind of steel scoria magnetic separation recovery system of utilizing magnetic selection method to reclaim ferrous metal; this system is at first with the slag sieve classification; select for use suitable magnetic plant to reclaim granulated iron to the slag of size fractionated then; magnetic separation intermediate products retrieval system after fragmentation is handled again; system's breaker mounting is crossed iron protection and electrical equipment interlocked control; reliable; the waste residue that produces can be used for doing flux, paves the way; there is not secondary emission; technology is simple, advanced technology, reliable; improve environment, have good economical, societal benefits.

Description

Magnetic separating, processing and recovery system for steel slag

The present invention relates to a kind ofly from steel-making waste residue, reclaim the magnetic separating, processing and recovery system for steel slag of metal, also belong to comprehensive utilization and environmental protective measure with magnetic selection method.Pile up like a mountain for the waste residue of discharging in the STEELMAKING PRODUCTION for many years, and increasing year by year, and wherein contained a large amount of useful metals go out of use, and cause the wasting of resources and economic loss; Cause a large amount of land seizures and serious environmental to pollute simultaneously.

The objective of the invention is to seek that a kind of technology is simple, advanced technology, reliable, comprehensive recovery system that cost is low, profitable, make steel slag be able to abundant recycling, reclaim ferrous metal to greatest extent, improve environment, contaminated solution reduces and takes up an area of.

Magnetic separating, processing and recovery system for steel slag principle process of the present invention is seen accompanying drawing, mainly by screening operation (1,2,3,4,5), magnetic concentration working (6,7,8,9,10,11), crushing operation (12,13,14) and formations such as picking operation (15,16), material transfer equipment, control panel and auxiliary equipment.The big grade that the former slag of slag at first sieves out through diagrid 1 partly is sent to electromagnetic disc 6 and tells qualified granulated iron, and the middle mine tailing of its generation then after fragmentation, returns diagrid again; The undersize of diagrid, successively by reciprocating

sieve

2,3,4,5,, the oversize of each section reciprocating sieve draws the qualified granulated iron of size fractionated respectively through magnetic concentration working 7,8,9,10,11; After the intermediate products that magnetic concentration working 7,8 is discharged are handled and are elected to be

industry

15,16 sortings, enter crushing

operation

13,14 broken back retrieval system suitable operations more respectively and handle again; Handle be elected to be the waste residue that Ye Lost abandons then can be as refractory material, the particulate tailings that magnetic concentration working 9,10,11 produces then can be used for paving the way etc.

The present invention utilizes screening operation that former slag is carried out sieve classification, material to size fractionated adopts suitable magnetic plant to handle recovery granulated iron respectively, as using the electromagnetic disc sorting, can select the magnetic separation roller for use to fine fraction, the optional belt magnetic separator of using of middle rank to coarse fraction is optional.The bigger intermediate products of granularity that the part magnetic concentration working is produced can select for use suitable disintegrating machine (as: crushing mill, jaw crusher, gyratory crusher etc.) to carry out fragmentation simultaneously, so that retrieval system is handled again.Thereby the efficient of various magnetic separation and disintegrating apparatus is not fully exerted.Still can be different with the ferrous metal particle size distribution characteristics according to the particle property of the former slag of slag, suitably increase or minimizing screening, magnetic separation, picking and crushing operation hop count, so that under specific slag raw material condition, the technological process of recovery system reaches optimization.For the reliability service that guarantees system crushing operation was installed the iron protective device, recovery system equipment was installed the electrical equipment interlocked control.

Because above characteristics, this system has the advantage that technological process is simple, technical-economic index is advanced, easy to operate, reliable, and slag can all be recycled after treatment, no longer produces secondary emission, saves the soil, improves environment.

As follows at the specific embodiment that the inventor did:

It is as follows that capital equipment is selected: screening operation diagrid 1 is selected 1 of 356 * 356mm gravity flow screen for use, and

screening operation

2,3 is selected 1 of USK1.6 * 4.55M reciprocating sieve respectively for use, and screening operation 4 is selected 2 of US2.0-32ED reciprocating sieves for use; Magnetic concentration working 6,7,8,9,10 is selected 1 on each 1 of electromagnetic disc, RMA600/120S, RMA300/80S, RMA250/100, RMA250/120 belt magnetic separator and MR80/220 magnetic separation roller respectively for use;

Crushing operation

12,13,14 is selected each 1 of crushing mill BEH1000/630 jaw crusher, 1600H/C gyratory crusher respectively for use; Mass transport is selected 5 of adjustable delivery chutes for use; Jaw crusher and gyratory crusher were installed the iron protective device; System equipment is installed the electrical equipment interlocked control.

This system can handle steel mill every year and discharge 2,400,000 tons of steel slags, reclaim ferrous grade 50.31～85.26% various 26.7 ten thousand tons of grade iron (for details see attached table), produce flux 15～200,000 ton, pave the way slag 100～1,100,000 ton, aggregate 88 for building～930,000 tons, total economic benefit reaches about 20,000,000 yuan.Save the soil simultaneously, improved social environment.

Subordinate list:

Embodiment reclaims ferrous metal formation table

Grain (mm) level product (%) position heavy (ten thousand tons) amount purposes

＞356 85.26 4 steel-making

856～100 84.61 3 steel-making

100～50 80.84 2 ironmaking

50～20 80.14 2.5 ironmaking

20～8 68.46 9 ironmaking

8～0 50.31 6.2 sintering

Amount to 26.7

Claims

1, a kind of magnetic selection method that utilizes that is made of screening operation, magnetic concentration working, crushing operation, picking operation, conveying equipment, control panel and auxiliary equipment etc. reclaims the magnetic separating, processing and recovery system for steel slag of ferrous metal from slag, its major technique is characterised in that this system is at first with former ballast screen classification, select for use suitable magnetic plant to handle respectively to the material of different stage, reclaim useful ferrous metal, simultaneously to sort intermediate products that the back produces select suitable crusher in crushing for use after retrieval system handle again.

2, recovery system according to claim 1, its major technique feature are different with the ferrous metal particle size distribution characteristics according to the former slag particle degree of slag characteristic, can suitably increase or reduce the hop count of screening, magnetic separation, picking and crushing operation.