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Non-standard-configured two-stage continuous ore grinding and grading process

A non-standard, grinding technology, applied in the direction of grain processing, etc., can solve the problem of over-grinding of tungsten-containing minerals, achieve the effect of grinding efficiency, avoid sludge problems, and reduce the sand return ratio.

Inactive Publication Date: 2019-07-26
HUNAN SHIZHUYUAN NON FERROUS METAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a two-stage continuous grinding and classification process with non-standard configuration, which solves the serious problem that the tungsten-containing minerals in the raw ore are easily over-crushed during the grinding process, and brings a very significant The effect of energy saving and consumption reduction

Method used

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  • Non-standard-configured two-stage continuous ore grinding and grading process
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Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1: a kind of two-stage continuous grinding and classification process of non-standard configuration, it is carried out according to the following steps,

[0036] Step 1: Feed tungsten-containing minerals or tungsten-containing polymetallic minerals into 1# ball mill and 3#M ball mill, the specification is QG2.7×3.6m;

[0037] Step 2: discharge ore pulp from 1# ball mill and 3# ball mill into corresponding 1# spiral classifier and 2# spiral classifier respectively;

[0038] Step 3: The sand returned from 1# spiral classifier and 2# spiral classifier is respectively discharged into the corresponding 1# ball mill and 3# ball mill;

[0039] Step 4: Adjust the -200 mesh content in the overflow of 1# spiral classifier and 2# spiral classifier to 55%, and the pulp is combined and discharged into the 1# pump pool and fed into the 1# hydrocyclone by the slurry pump for classification ;

[0040] Step 5: 1# hydrocyclone graded grit is discharged into 2# ball mill for ...

Embodiment 2

[0043] Embodiment 2: a kind of two-stage continuous grinding and classification process of non-standard configuration, it carries out according to the following steps,

[0044] Step 1: Feed tungsten-containing minerals or tungsten-containing polymetallic minerals into 1# ball mill and 3#M ball mill, the specification is QG2.7×3.6m;

[0045] Step 2: discharge ore pulp from 1# ball mill and 3# ball mill into corresponding 1# spiral classifier and 2# spiral classifier respectively;

[0046] Step 3: The sand returned from 1# spiral classifier and 2# spiral classifier is respectively discharged into the corresponding 1# ball mill and 3# ball mill;

[0047] Step 4: Adjust the -200 mesh content in the overflow of 1# spiral classifier and 2# spiral classifier to 65%, and the pulp is combined and discharged into the 1# pump pool and fed into the 1# hydrocyclone by the slurry pump for classification ;

[0048] Step 5: 1# hydrocyclone graded grit is discharged into 2# ball mill for reg...

Embodiment 3

[0051] Embodiment 3: a kind of two-stage continuous grinding and classification process of non-standard configuration, it carries out according to the following steps,

[0052] Step 1: Feed tungsten-containing minerals or tungsten-containing polymetallic minerals into 1# ball mill and 3#M ball mill, the specification is QG2.7×3.6m;

[0053] Step 2: discharge ore pulp from 1# ball mill and 3# ball mill into corresponding 1# spiral classifier and 2# spiral classifier respectively;

[0054] Step 3: The sand returned from 1# spiral classifier and 2# spiral classifier is respectively discharged into the corresponding 1# ball mill and 3# ball mill;

[0055] Step 4: Adjust the -200 mesh content in the overflow of 1# spiral classifier and 2# spiral classifier to 60%, and the pulp is combined and discharged into the 1# pump pool and fed into the 1# hydrocyclone by the slurry pump for classification , at this time, the classification mass efficiency and volume efficiency of the hydrocycl...

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Abstract

The invention discloses a non-standard-configured two-stage continuous ore grinding and grading process. Tungsten-containing raw ore is fed into two ball mills at the same time, ground products of each ball mill are fed into a corresponding spiral classifier for grading, graded returned sand returns to the corresponding ball mill for grinding again, each ball mill and the corresponding spiral classifier form closed-circuit grinding, graded overflow of the two spiral classifiers is fed into a same pump tank, ore pulp in the pump tank is fed into a hydrocyclone for grading, a graded overflow sample is obtained as a final product after grinding and grading, obtained grading grit is fed into a third ball mill for regrinding, and reground ore pulp is discharged into the pump tank to form closed-circuit grinding. The process has the advantages that for brittle and fragile tungsten-containing substances, not only total grinding energy consumption is low, the operation cost is low, process improvement is convenient, but also the graded overflow product has uniform particle size distribution, and the grade of tungsten-containing flotation tailings can be continuously reduced based on the prior art. The process is suitable for popularization and application of metallic mineral rich in tungsten.

Description

technical field [0001] The invention relates to a two-stage continuous grinding and classification process with non-standard configuration, belonging to the technical field of grinding. Background technique [0002] For a concentrator mainly based on flotation, the selection of grinding and classification process is very important. Because the grinding and classification process is responsible for providing materials with suitable particle size for flotation. However, setting different grinding processes will result in different particle size product quality. Common grinding processes include one-stage closed-circuit grinding process, two-stage closed-circuit grinding process, and semi-autogenous grinding process. [0003] The two-stage continuous grinding and classification process of the standard configuration in the prior art adopts a total of 4 ball mills, 1# and 3# are one-stage ball mills for coarse grinding; 2# and 4# are two-stage ball mills for fine grinding, The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00B02C23/12B02C23/14
CPCB02C21/00B02C23/12B02C23/14
Inventor 石志中吴彩斌徐涛廖宁宁
Owner HUNAN SHIZHUYUAN NON FERROUS METAL
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