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Magnetite series high-pressure roller mill cooperated tailing discarding energy-saving crushing method

A high-pressure roller mill and high-pressure roller mill technology, applied in the field of magnetite ore beneficiation, can solve the problems of long ore beneficiation process, difficulty in meeting market demand, high cost, etc., achieve obvious coarse concentrate grade, reduce the amount of ore entering the grinding, and recover high rate effect

Active Publication Date: 2021-04-30
安徽新建矿业工程技术有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the raw ore grade is greatly reduced, the quantitative change will lead to a qualitative change, and the properties of the ore to be selected will change greatly. The current mineral processing process is difficult to adapt to. to satisfy the market's needs

Method used

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  • Magnetite series high-pressure roller mill cooperated tailing discarding energy-saving crushing method
  • Magnetite series high-pressure roller mill cooperated tailing discarding energy-saving crushing method
  • Magnetite series high-pressure roller mill cooperated tailing discarding energy-saving crushing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Taking a concentrator with a single high-pressure roller mill processing capacity of 5 million t / a as an example, the raw ore samples are taken from the final product of the ore crushing operation of the concentrator, and the samples are mainly magnetite, false hematite, hematite, Limonite, pyrite, siderite and ferric silicate, raw ore chemical multi-element analysis, iron phase analysis results, and particle size composition analysis results are shown in Table 1, Table 2 and Table 3, respectively.

[0053] Table 1 Raw ore chemical multi-element analysis results / %

[0054] element TF SiO 2

Al 2 o 3

CaO MgO S P K 2 o

content 21.38 37.22 11.36 4.60 3.20 1.27 0.741 0.627 element Na 2 o

MnO ZnO TiO 2

Cr 2 o 3

V 2 o 5

CuO NiO content 2.35 0.140 0.008 0.729 ＜0.005 0.118 0.005 ＜0.005

[0055] Table 2 Analysis results of raw ore iron phase

[0056]

[0057] Table 3 R...

Embodiment 2

[0081] Taking a magnetite in Anhui as an example, the concentrator uses high-pressure roller mills instead of fine crushing operations, and the particle size of the crushed ore products is -30mm. The results of chemical multi-element analysis, iron phase analysis, and particle size composition analysis of the raw ore are shown in Table 5 and Table 6, respectively. and Table 7.

[0082] Table 5 Raw ore chemical multi-element analysis results / %

[0083] element TF mFe Al 2 o 3

CaO Zn Gr S P content 36.09 29.25 4.29 6.81 0.16 0.01 0.84 0.76 element MnO K 2 o

Na 2 o

TiO 2

MgO V 2 o 5

SiO 2

Loss on ignition content 0.25 0.83 0.36 0.28 5.56 0.33 17.53 7.62

[0084] Table 6 Raw ore iron phase analysis results / %

[0085] mineral magnetite Red (brown) iron ore pyrrhotite pyrite Siderite Iron silicate content 28.59 4.28 0.18 0.71 1.48 0.85 distribu...

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Abstract

The invention discloses a magnetite series high-pressure roller mill cooperated tailing discarding energy-saving crushing method, and relates to the technical field of magnetite ore dressing. The method comprises the steps that crushed magnetite raw ore is fed into a first-stage high-pressure roller mill, first-stage rolled products are fed into a first-stage screen, the first-stage screen feeds oversize products into a first-stage magnetic pulley, the first-stage magnetic pulley returns concentrate to the first-stage high-pressure roller mill, the first-stage screen feeds undersize products into a fine ore dry separator, the fine ore dry separator feeds concentrate into a second-stage high-pressure roller mill, second-stage rolled products are fed into a second-stage screen, the first-stage screen feeds oversize products into a second-stage magnetic pulley, the second-stage magnetic pulley returns concentrate to the second-stage high-pressure roller mill, the second-stage screen feeds undersize products into a wet magnetic separator, and rough concentrate is obtained. By adopting the method, the rough concentrate grade is obviously improved, the recovery rate is good, and the magnetic iron recovery rate is high; and the energy efficiency ratio is improved, the yield of a main workshop is increased, and energy conservation and efficiency improvement are achieved.

Description

technical field [0001] The invention relates to the technical field of magnetite ore beneficiation, in particular to a method for energy-saving crushing of magnetite in series with high-pressure roller mills in conjunction with tailing throwing. Background technique [0002] In recent years, with the continuous and rapid development of my country's economy, the market weight of steel is still extremely important, and the demand for iron ore has always been huge. However, my country's iron ore resources are less rich ore and more lean ore. The characteristics of "poor, fine, and miscellaneous" have become more prominent with the massive mining of iron ore. In order to ensure the supply of iron metal, the cut-off grade continues to decline, resulting in The proportion of ore that is easy to be selected is gradually reduced, the difficulty of beneficiation is increasing, and the cost of beneficiation is greatly increased. [0003] The current relatively mainstream magnetite ben...

Claims

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Application Information

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IPC IPC(8): B02C21/00B02C4/02B03C1/30B04C5/081
CPCB02C21/00B02C4/02B03C1/30B04C5/081Y02P10/20
Inventor 葛新建陈于海桂志海程传麟胡佛明沈远海吴国军葛琨杨书春刘翀常军胡城刘广才赵文涛刘进
Owner 安徽新建矿业工程技术有限责任公司
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