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Beneficiation process of high-sulfur composite iron ore and pre-selection production system thereof

A production system, iron ore technology, applied in the beneficiation process of high-sulfur composite iron ore and its pre-selection production system, can solve the problem of cost reduction and efficiency increase, reduction of iron element, sulfur element and copper element recovery rate, and impact on sales Price and other issues, to achieve the effect of low investment and high utilization rate

Active Publication Date: 2021-09-24
马钢集团设计研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the tailings are discarded by weak magnetic dry separation for high-sulfur compound iron ore, pyrite and hematite will also enter the tailings together with the gangue. The tailings contain hematite, pyrite and chalcopyrite, not only The recovery rate of iron, sulfur and copper elements is reduced, and the content of sulfur in the tailings waste rock is relatively high, which affects the selling price of building materials
For example, the iron ore selected by a concentrator in Anhui is high-sulfur composite iron ore. The beneficiation process is a conventional three-stage and one closed-circuit process. While dry selection pre-selection is used to reduce costs and increase efficiency, it will also cause the loss of associated elements sulfur and copper in the waste rock, and cause higher sulfur elements in the waste rock, which will affect the sales price

Method used

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  • Beneficiation process of high-sulfur composite iron ore and pre-selection production system thereof
  • Beneficiation process of high-sulfur composite iron ore and pre-selection production system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of beneficiation process of high-sulfur composite iron ore of the present embodiment, such as figure 2 shown, including the following steps:

[0039] Step 1. Crushing: two-stage open-circuit crushing is used to crush the raw ore to -70mm, the first-stage crushing adopts the jaw crusher 3 for primary crushing, and the second-stage crushing selects the secondary crushing cone crusher 5 for secondary crushing;

[0040] Step 2. Screening: The products under the screen enter the grinding operation of the main plant as the final product of crushing, and the products on the screen enter the weak magnetic dry separation operation;

[0041] Step 3, weak magnetic dry separation: carry out weak magnetic dry separation on the screened product of the vibrating screen 7, the weak magnetic dry separation tailings enter the XRT intelligent dry separation operation, and the weak magnetic dry separation concentrate enters the fine crushing operation;

[0042] Step 4, XRT intelli...

Embodiment 2

[0047] A kind of beneficiation process of high-sulfur composite iron ore of the present embodiment, basic structure is the same as embodiment 1, difference and improvement are: comprise the following steps:

[0048] Step 1. Two-stage open-circuit crushing: the raw ore is ore mined underground, and its maximum ore particle size is 750mm. Two-stage open-circuit crushing is used to crush the raw ore to -70mm. One-stage crushing uses CJ612 jaw crusher, and the ore discharge particle size is 300mm; The second stage adopts CH870 cone crusher, and its ore discharge particle size is -70mm.

[0049] Step 2. Screening: The sieve hole size of the vibrating screen is 12mm, and the product under the screen -12mm enters the grinding operation as a finely crushed product; the product on the screen -70+12mm is dry-selected with a weak magnetic magnetic roller, and the magnetic induction intensity on the surface of the magnetic roller tape It is 0.3T, the yield of tailings in weak magnetic dry...

Embodiment 3

[0053] A kind of beneficiation process of high-sulfur composite iron ore of the present embodiment, basic structure is the same as embodiment 2, difference and improvement are: comprise the following steps:

[0054] Step 1. Two-stage open-circuit crushing: the raw ore is ore mined underground, and its maximum ore particle size is 750mm. Two-stage open-circuit crushing is used to crush the raw ore to -70mm. One-stage crushing uses CJ612 jaw crusher, and the ore discharge particle size is 300mm; The second stage adopts CH870 cone crusher, and its ore discharge particle size is -70mm.

[0055] Step 2. Screening: The sieve hole size of the vibrating screen is 12mm, and the product under the screen -12mm enters the grinding operation as a finely crushed product; the product on the screen -70+12mm is dry-selected with a weak magnetic magnetic roller, and the magnetic induction intensity on the surface of the magnetic roller tape It is 0.3T, the yield of tailings in weak magnetic dry...

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Abstract

The invention discloses a beneficiation process of high-sulfur composite iron ore and a pre-selection production system thereof, and relates to the technical field of iron ore beneficiation. According to the beneficiation process of the high-sulfur composite iron ore and the pre-selection production system thereof, a weak magnetic dry separation process and an XRT intelligent dry separation combined separation process are adopted according to different physicochemical properties of different iron ore in the iron ore, the weak magnetic dry separation process is firstly adopted, magnetite is recycled from raw ore, and hematite weak magnetic minerals enter tailings; and then intelligent dry separation is conducted on the tailings through the XRT intelligent dry separation, sulfur-containing iron ore and the like obtained through dry separation of an XRT intelligent dry separation machine and weak magnetic concentrate of a weak magnetic dry separation machine are combined and enter a fine crushing buffer ore bin, ore in the fine crushing buffer ore bin is fed into a fine crushing cone crusher through a rubber belt feeder, and fine crushing products and intermediate crushing products are combined and fed into a screening buffer ore bin, so that the particle size of crushed products is ensured to be-12 mm, all crushed-70+12mm products are effectively pre-selected, gangue minerals are removed, and the ore grinding and sorting cost is reduced.

Description

technical field [0001] The invention relates to the technical field of iron ore beneficiation, in particular to a beneficiation process of high-sulfur composite iron ore and a pre-selection production system thereof. Background technique [0002] Energy saving and consumption reduction means saving energy, reducing consumption, and using the least investment to obtain the greatest economic benefits. my country will achieve the goal of "carbon peak" before 2030 and "carbon neutrality" before 2060, which puts forward higher requirements for my country's energy conservation and emission reduction. Energy saving is the most important and economical means to achieve "carbon neutrality", and the mining industry is an industry that consumes a lot of energy in my country. This requires mining companies to start from the subtleties to find out the energy saving and consumption reduction based on their own different conditions and ore characteristics. The key point is to comprehensive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07C5/02B07C5/34B07C5/36B03C1/30B07B1/28B07B1/46B02C21/00
CPCB07C5/02B07C5/34B07C5/362B07C5/365B03C1/30B07B1/4609B07B1/28B02C21/00Y02W30/52
Inventor 孙业长丁开振钱士湖李斌王宏喜王文景王世标何晓文姚卫红邓秀兰陈克峰
Owner 马钢集团设计研究院有限责任公司
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