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Pre-selection process of high-mud hematite iron ore

An iron ore and process technology, which is applied in the field of high-mudity hematite ore and the pre-selection process of high-mudity hematite ore, can solve the problems of unsatisfactory pre-selection effect of high-mudity hematite ore, etc. Efficient preselection effect

Pending Publication Date: 2022-03-04
安徽马钢矿业资源集团姑山矿业有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the unsatisfactory pre-selection effect of existing high-mud hematite ore in the background technology, the present invention provides a pre-selection process for high-mud hematite ore

Method used

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  • Pre-selection process of high-mud hematite iron ore
  • Pre-selection process of high-mud hematite iron ore

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Experimental program
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Effect test

Embodiment 1

[0035] as attached figure 1 Shown, the pre-selection process of a kind of high-mud hematite ore of the present invention, at first the ore that is mined is through coarse crushing, medium crushing to -65mm grain grade to satisfy the ore supply condition of described pre-selection process, and adopt following process:

[0036] S1. Dry-screen the secondary crushed product with a particle size of -65mm to obtain two product grades of -65+20mm and -20mm;

[0037] S2. Washing and desliming the -20mm particle size product obtained in step S1 and performing strong magnetic separation on the overflow of the ore washing to obtain strong magnetic separation concentrate and strong magnetic separation tailings;

[0038] S3. Combine the -65+20mm particle size product obtained in step S1 with the ore washing and return sand in step S2 and crush it to -15mm, then perform dry screening to obtain two particle size products of -15+6mm and -6mm ;

[0039] S4. The -15+6mm particle size product ...

Embodiment 2

[0049] The high-mud hematite ore was taken from an iron mine in Anhui. The results of chemical multi-element analysis of the raw ore are shown in Table 1, and the results of iron phase analysis are shown in Table 2.

[0050] Table 1 Chemical multi-element analysis results of high-mud hematite ore (%)

[0051] Laboratory items content(%) Laboratory items content(%) TF 36.29 Na 2 o

0.465 SiO 2

31.45 MnO 0.122 Al 2 o 3

5.91 V 2 o 5

0.126 CaO 2.82 TiO 2

0.317 MgO 0.863 CuO <0.005

S 0.068 ZnO 0.024 P 0.633 Cr 2 o 3

<0.005

K 2 o

0.617 NiO <0.005

[0052] Table 2 Iron phase analysis results of high-mud hematite ore (%)

[0053] iron phase Iron phase iron content share magnetite iron 0.67 1.85 hematite iron 34.51 95.15 pyrite iron 0.19 0.52 pyrrhotite iron / / Iron Carbonate 0.60 1.65 iron ferrosilicate ...

Embodiment 3

[0063] The present invention is a preselection system for high-mud hematite ore, which includes coarse crushing equipment 1, medium crushing equipment 2, first screening equipment 3, ore washing equipment 4, strong magnetic separation equipment 5, crushing equipment 6, the second Screening equipment 7, strong magnetic dry separation roughing equipment 8, strong magnetic dry separation selection equipment 11, high-pressure roller mill 9, wet coarse-grained strong magnetic roughing equipment 10 and wet-type coarse-grained strong magnetic sweeping equipment 12; The discharge port of the coarse crushing equipment 1 is connected with the feed port of the secondary crushing device 2; the discharge port of the secondary crushing device 2 is connected with the feed port of the first screening device 3; the first screening device 3 The fine-grained product outlet of the ore washing device 4 is connected to the feeding port of the ore washing equipment 4, and its coarse-grained product o...

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Abstract

The invention discloses a pre-selection process and a pre-selection system for high-mud hematite ore, which are characterized in that a screening and spiral ore washing combined desliming process is adopted for intermediate crushed products (-65 mm), and strong magnetic separation is performed on ore washing overflow to reduce the grade of tailing iron; after ore subjected to ore washing and desliming is crushed to-15 mm, the crushed ore is screened and classified into-15 + 6 mm and-6 mm two particle fractions, strong magnetic dry separation is conducted on the particle fractions of-15 + 6 mm, rough separation and fine separation are conducted, and lump concentrate, lump tailings and part of middlings are obtained; and the strong magnetic dry middling and a product with the size fraction of-6mm are combined to be subjected to high-pressure roller grinding-wet type coarse grain strong magnetic pre-concentration one-roughing one-sweeping, wet type coarse grain magnetic separation tailings are thrown, wet type coarse grain strong magnetic pre-concentration concentrate is obtained, and the wet type coarse grain strong magnetic pre-concentration concentrate and strong magnetic separation concentrate overflowed after ore washing are combined to enter subsequent grinding separation operation. According to the method, the processes of ore washing and desliming, high-intensity magnetic separation tailing reduction, lump ore crushing, graded dry type high-intensity magnetic separation, middling high-pressure roller grinding, wet type coarse grain high-intensity magnetic pre-separation and the like are efficiently integrated, the advantages of various separation processes are fully played, the defects of the separation processes are avoided, and efficient pre-separation of the high-mud hematite ore is achieved.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a pre-selection process of high-mud hematite ore, which is especially suitable for treating high-mud hematite with a TFe grade of 35.0%-40.0% and a mud content of 8%-12%. iron ore. Background technique [0002] Pre-selection is an important part of iron ore beneficiation, and pre-selection and throwing tails are an important means to realize "more crushing and less grinding" and "capable throwing and early throwing". For single magnetite, the application of pre-selection is becoming more and more mature. Before 2004, the pre-selection of magnetite was mainly used for coarse crushing (-300mm) and medium crushing (-75mm) by large dry magnetic separation; The finely crushed products (-12mm) are pre-selected and discarded by a wet-type coarse-grained medium-magnetic separator. In 2004, with the successful application of high-pressure roller mills, the par...

Claims

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Application Information

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IPC IPC(8): B03B9/00B02C21/00B03C1/02B07B1/28B03C1/025B02C1/02B03B5/52
CPCB03B9/00B02C21/00B03C1/02B07B1/28B03C1/025B02C1/02B03B5/52
Inventor 王欢翁金红王荣林梁朝杰李明军刘军杨任新袁启东王炬李亮
Owner 安徽马钢矿业资源集团姑山矿业有限公司
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