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Ore-dressing and separating method for Lingyang stone

A separation method, the technology of antelope stone, which is applied in the field of mineral processing, can solve the problems of large fluctuation range of chemical composition of antelope pig iron, high phosphorus and sulfur content, etc.

Inactive Publication Date: 2006-01-11
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (3) Antelope pig iron contains high phosphorus and sulfur
[0007] (4) The chemical composition of antelope pig iron has a large fluctuation range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Antelope iron ore was used for verification, and the raw ore sample was crushed by a closed-circuit crushing process consisting of a jaw crusher, a roller crusher and a 2.5mm sieve. The crushed product was homogenized, fractionated and sampled. The results of multi-component chemical analysis of raw ore are shown in Table 1.

[0023] the element

[0024] Coal gas was used as the reducing agent, and the roasting was carried out under different temperature conditions in a tube roasting furnace, and the roasting time was 10 minutes. The roasted ore is naturally cooled to room temperature, and the roasted product is ground to a fineness of -200 mesh with a content of 90%, and then magnetically separated. The field strength is 1450 Oersted, and then a period of selection is carried out with an electromagnetic concentrator, with a field strength of 185 Oersteds. The results are shown in Table 2.

[0025]

[0026] It can be seen from the results in Table ...

Embodiment 2

[0031] Raw ore is with embodiment 1.

[0032] The raw ore samples were crushed by a closed-circuit crushing process consisting of a jaw crusher, a roller crusher and a 2.5mm sieve, and the crushed products were mixed, shrunk and sampled.

[0033] Using bituminous coal powder as the reducing agent, roasting at different temperatures in a tubular roaster, cooling the roasted ore to room temperature naturally, grinding the roasted product to -200 mesh content of 95%, and then performing magnetic separation, including two One-stage weak magnetic field magnetic separation and one-stage selection. First, two-stage magnetic separation is performed with a weak magnetic field magnetic separator with a field strength of 1450 Oersteds, and then a stage of selection is performed with an electromagnetic separator with a field strength of 185 Oersteds. The magnetic separation results when the pulverized coal addition is 10% and 15% of the ore amount are shown in Table 4 and Table 5. The ro...

Embodiment 3

[0038] Raw ore is with embodiment 1.

[0039] The raw ore samples were crushed by a closed-circuit crushing process consisting of a jaw crusher, a roller crusher and a 2.5mm sieve, and the crushed products were mixed, shrunk and sampled.

[0040] Using bituminous coal powder as the reducing agent, roasting at different temperatures is carried out in the rotary kiln. The roasted products are cooled and ground to -200 mesh with a content of 85%, and then two-stage magnetic separation is carried out with a weak magnetic field magnetic separator. The field strength is 1450 Oersted, and then a period of selection with an electromagnetic concentrator, with a field strength of 185 Oersted. The roasting time is 10min.

[0041] The amount of pulverized coal added is 15% of the ore amount, and the results are shown in Table 6.

[0042] Roasting temperature

[0043] The results show that the Fe grade of the magnetic separation concentrate increases with the increase of the ro...

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Abstract

A dressing method for the Linjiang iron-manganese ore includes such steps as crushing by 2-100 mm, calcining with gas or coal as reducing agent, natural cooling, pulverizing, two-stage magnetic separation by weak magnetic field and electromagnetic fine separation.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for beneficiation and separation of antelope stone. Background technique [0002] In the area of ​​Dalizi Town, Linjiang City, Jilin Province, there is a layer of ferromanganese-containing iron ore that is widely distributed and has large reserves. The ore in this ore layer is called antelope stone or oolitic chlorite, also known as Linjiang ferromanganese ore. [0003] In the early 1970s, seven units including Dalizi Iron Mine, Tonghua Iron and Steel Works, and Jilin Provincial Institute of Metallurgy conducted comprehensive and systematic experimental research on Antelope Stone, including ore dressing, blast furnace smelting, casting, steelmaking, and comprehensive utilization of slag. etc. The research results show that the antelope ore is a polymetallic ore containing iron, manganese, rare earth and trace rare metal elements. The iron content...

Claims

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Application Information

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IPC IPC(8): B03C1/30
Inventor 韩跃新董安华李艳军于福家袁致涛王泽红
Owner NORTHEASTERN UNIV
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