CN102921521A - Ore grinding grading method for improving ore grinding processing capacity - Google Patents
Ore grinding grading method for improving ore grinding processing capacity Download PDFInfo
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- CN102921521A CN102921521A CN2012104478719A CN201210447871A CN102921521A CN 102921521 A CN102921521 A CN 102921521A CN 2012104478719 A CN2012104478719 A CN 2012104478719A CN 201210447871 A CN201210447871 A CN 201210447871A CN 102921521 A CN102921521 A CN 102921521A
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Abstract
The invention relates to mineral processing process improvement in the metallurgical industry, belongs to a process for improving grading efficiency and reducing qualified grade return quantity to increase processing capacity of a ball mill, and particularly relates to an ore grinding grading method for improving ore grinding processing capacity. The ore grinding grading method comprises firstly enabling products after ore crushing to enter the ball mill for ore grinding, sending discharged ore from the ball mill to a hydrocyclone for separation through a slurry pump, returning setting sand in the hydrocyclone to the ball mill, sending fine fraction products which are overflow of the hydrocyclone to a high-frequency vibration sieve for secondary separation through an ore division device, returning products on the sieve to enter the slurry pump, recycling to enter the hydrocyclone for separation, and conducting follow-up grading procedures on products below the sieve. The ore grinding grading method solves a problem that the existing ore grinding grading process is low in grading efficiency, low in platform efficiency of grinding machines, unstable in work and the like. The ore grinding grading method is mainly suitable to mineral separation processing of copper mine and lead and zinc metal ore.
Description
Technical field
The ore-dressing technique that the present invention relates in the metallurgical mining industry is improved especially a kind of grind grading method that improves the ore grinding disposal ability.
Background technology
At present, in metallurgical mining industry is produced, mainly be divided into for two megastages for the ore-dressing technique on copper mine, plumbous zinc ore mountain, be grind grading flow process+sort flow process (comprise roughly select, selected etc.).Traditional grinding grading technique flow process mainly is to adopt ball mill to form closed circuit technique with grader or cyclone, be that raw ore enters ball mill, the grinding of ball grinder mineral products enter grader or enter cyclone classification through sand pump, defective coarse fraction product after the classification returns ball mill mineral-feeding, qualified products (fine fraction) enter the follow-up flow process that sorts, and the shortcoming that existing grind grading flow process exists has:
(1) is difficult for obtaining thinner Grading Overflow fineness, particularly overflow fineness requirement-0.074mm and accounts for very difficult realization the more than 90%, had a strong impact on follow-up sorting result;
(2) large proportion valuable mineral derichment in the sand return causes valuable mineral overground, and argillization is serious;
(3) classification efficiency is low, and grader generally only is 20%-40%, and cyclone is that 30%-60% causes ore grinding board effect low;
(4) grader exists helical blade and spiral lower end thrust bearing easily to wear and tear, and overhauls very inconvenient;
(5) cyclone causes the unstable of grading effect because the wearing and tearing of spigot or feed are unstable, and the fluctuation of special granularity thickness is frequent.
For this reason, up-to-date grind grading flow process installs high frequency vibrating fine screen additional after cyclone, and undersize enters the follow-up flow process that sorts, and regrinds and oversize returns ball mill by traditional thinking mode.This improvement, although guaranteed the classification quality, bring two large problems: the one, seriously cause the unstable of mill feed amount and feed concentration, reduce the grinding efficiency of ore mill, finally affect classification efficiency; The 2nd, because of the oversize poor fluidity, need certain discrepancy in elevation could realize that oversize enters ball mill, increase sand pump, increase energy consumption.
Summary of the invention
Purpose of the present invention is exactly will solve traditional grinding grading technique to be difficult for obtaining thinner classification fineness, classification efficiency is low, system works is unstable, and it is incorrect to install the high frequency fine screen mode additional, reduce the problems such as grinding machine effect, increase power consumption, a kind of grind grading method that improves the ore grinding disposal ability is provided.
Concrete scheme of the present invention is: a kind of grind grading method that improves the ore grinding disposal ability, at first the product introduction ball mill behind the muck is carried out ore grinding, the ball milling ore discharge is delivered to the cyclone sorting through the slag stock pump, the sand setting of cyclone returns ball mill, the overflow of cyclone is that fine-graded product is sent into again sorting of high frequency vibrating fine screen through mine distributor, oversize returns and enters the slag stock pump, and recirculation enters the cyclone sorting; Undersize carries out the follow-up flow process that sorts
Ore pulp among the present invention behind the ball milling enters in the spiral circle shaft screen that diameter is Φ 16mm sieve aperture, carries out every slightly, and the ore pulp after thick enters slag stock pump material pond through chute, to improve follow-up classification efficiency.
The particle diameter of high concentration returns ball mill greater than 0.5mm particle ore pulp and regrinds after the sorting of cyclone described in the present invention; The particle diameter of low concentration is sent into the high frequency vibrating fine screen screening less than 0.5mm particle ore pulp.
Ball mill described in the present invention is to select grate ball mill or overflowball mill.
High frequency vibrating fine screen described in the present invention is to select individual layer high frequency vibrating fine screen or stack high-frequency vibration undersize sieve, and the screen cloth of high frequency vibrating fine screen is selected anti-blocking abrasion resistant polyurethane screen cloth.
Directly merge with the ore mill ore milling product by the high frequency vibrating fine screen oversize among the present invention and enter the slag stock pump, can realize reducing the setting height(from bottom) of high frequency vibrating fine screen, reduce the vertical lift of slag stock pump, energy consumption and the investment of minimizing slag stock pump.And can guarantee to enter the stable of ore mill ore deposit amount and pulp density, realize the high concentration ore grinding requirement of grinding machine, guarantee grinding efficiency.Oversize returns the cyclone dehydration by the slag stock pump simultaneously, solves the instability problem of high frequency shale shaker oversize concentration, and high concentration coarse grain mineral return ore mill by cyclone.Can guarantee like this stability of system's mine-supplying quantity and feed ore concentration, improve ore grinding board effect purpose to reach.
It is large that process of the present invention takes full advantage of the cyclone disposal ability, and dehydrating effect is good and the high characteristics of high frequency vibrating fine screen classification efficiency have improved the classification efficiency of hierarchy system and the grinding efficiency of grinding machine largely.Classification efficiency not only improves the easily sorting grain size content more than 10% up to more than 80%, ball mill ore grinding platform effect has been improved more than 5%, and comprehensively improved system's ore grinding disposal ability.Each decline of ﹢ 80 orders and ﹣ 400 content reaches more than 5% in the graded product granularmetric composition, reduces above maximum can get the content of granularity and alleviating argillization, more is conducive to follow-up sorting operation.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
Referring to Fig. 1, grind grading method of the present invention is: at first the product introduction ball mill behind the muck is carried out ore grinding, the ball milling ore discharge is delivered to the cyclone sorting through the slag stock pump, the sand setting of cyclone returns ball mill, the overflow of cyclone is that fine-graded product is sent into again sorting of high frequency vibrating fine screen through mine distributor, oversize returns and enters the slag stock pump, and recirculation enters the cyclone sorting; Undersize carries out the follow-up flow process that sorts
Ore pulp described in the present embodiment behind the ball milling enters in the spiral circle shaft screen that diameter is Φ 16mm sieve aperture, carries out every slightly, and the ore pulp after thick enters slag stock pump material pond through chute.
The particle diameter of high concentration returns ball mill greater than 0.5mm particle ore pulp and regrinds after the sorting of cyclone described in the present embodiment; The particle diameter of low concentration is sent into the high frequency vibrating fine screen screening less than 0.5mm particle ore pulp.
Ball mill described in the present embodiment is to select grate ball mill (or overflowball mill).
High frequency vibrating fine screen described in the present embodiment is to select individual layer high frequency vibrating fine screen (or stack high-frequency vibration undersize sieve), and the screen cloth of high frequency vibrating fine screen is selected anti-blocking abrasion resistant polyurethane screen cloth.
Claims (5)
1. grind grading method that improves the ore grinding disposal ability, at first the product introduction ball mill behind the muck is carried out ore grinding, the ball milling ore discharge is delivered to the cyclone sorting through the slag stock pump, the sand setting of cyclone returns ball mill, the overflow of cyclone is that fine-graded product is sent into again sorting of high frequency vibrating fine screen through mine distributor, oversize returns and enters the slag stock pump, and recirculation enters the cyclone sorting; Undersize carries out the follow-up flow process that sorts.
2. a kind of grind grading method that improves the ore grinding disposal ability according to claim 1, it is characterized in that: the ore pulp behind the ball milling enters in the spiral circle shaft screen that diameter is Φ 16mm sieve aperture, carries out every slightly, and the ore pulp after thick enters slag stock pump material pond through chute.
3. described a kind of grind grading method that improves the ore grinding disposal ability according to claim 1 is characterized in that: the particle diameter of high concentration returns ball mill greater than 0.5mm particle ore pulp and regrinds after the described cyclone sorting; The particle diameter of low concentration is sent into the high frequency vibrating fine screen screening less than 0.5mm particle ore pulp.
4. a kind of grind grading method that improves the ore grinding disposal ability according to claim 1, it is characterized in that: described ball mill is to select grate ball mill or overflowball mill.
5. a kind of grind grading method that improves the ore grinding disposal ability according to claim 1, it is characterized in that: described high frequency vibrating fine screen is to select individual layer high frequency vibrating fine screen or stack high-frequency vibration undersize sieve, and the screen cloth of high frequency vibrating fine screen is selected anti-blocking abrasion resistant polyurethane screen cloth.
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103657824A (en) * | 2013-12-16 | 2014-03-26 | 裴寿益 | Ore grinding method |
CN103934087A (en) * | 2014-04-14 | 2014-07-23 | 尤廷晏 | Method for treating intermediate product generated in copper smelting process |
CN104689885A (en) * | 2013-12-10 | 2015-06-10 | 沈阳铝镁设计研究院有限公司 | Self-circulating bauxite grinding technology |
CN104689979A (en) * | 2013-12-10 | 2015-06-10 | 沈阳铝镁设计研究院有限公司 | Efficient high-solid content bauxite grinding process |
CN108866348A (en) * | 2018-07-27 | 2018-11-23 | 阳谷祥光铜业有限公司 | A kind of space blowing material preparation technology and stock preparation system of matte |
CN109550566A (en) * | 2018-10-29 | 2019-04-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | It is a kind of to reduce ore grinding energy consumption, reducing the grinding process crushed |
CN111992488A (en) * | 2020-09-17 | 2020-11-27 | 济南中燃科技发展有限公司 | Composite vibrating screen screening device and vibrating screen |
CN112517164A (en) * | 2020-12-16 | 2021-03-19 | 彝良驰宏矿业有限公司 | Ball mill discharging device |
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Cited By (10)
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CN104689885A (en) * | 2013-12-10 | 2015-06-10 | 沈阳铝镁设计研究院有限公司 | Self-circulating bauxite grinding technology |
CN104689979A (en) * | 2013-12-10 | 2015-06-10 | 沈阳铝镁设计研究院有限公司 | Efficient high-solid content bauxite grinding process |
CN104689979B (en) * | 2013-12-10 | 2016-08-31 | 沈阳铝镁设计研究院有限公司 | A kind of efficiently large arch dam bauxite grinding technology |
CN104689885B (en) * | 2013-12-10 | 2017-02-22 | 沈阳铝镁设计研究院有限公司 | Self-circulating bauxite grinding technology |
CN103657824A (en) * | 2013-12-16 | 2014-03-26 | 裴寿益 | Ore grinding method |
CN103934087A (en) * | 2014-04-14 | 2014-07-23 | 尤廷晏 | Method for treating intermediate product generated in copper smelting process |
CN108866348A (en) * | 2018-07-27 | 2018-11-23 | 阳谷祥光铜业有限公司 | A kind of space blowing material preparation technology and stock preparation system of matte |
CN109550566A (en) * | 2018-10-29 | 2019-04-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | It is a kind of to reduce ore grinding energy consumption, reducing the grinding process crushed |
CN111992488A (en) * | 2020-09-17 | 2020-11-27 | 济南中燃科技发展有限公司 | Composite vibrating screen screening device and vibrating screen |
CN112517164A (en) * | 2020-12-16 | 2021-03-19 | 彝良驰宏矿业有限公司 | Ball mill discharging device |
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Address after: 435005 Hubei city of Huangshi province non-ferrous Industrial Park Gold Hill Development Zone No. 281 moves Patentee after: HUBEI XINYING ENVIRONMENTAL TECHNOLOGY CO., LTD. Patentee after: Daye Nonferrous Metals Group Holdings Co., Ltd. Address before: 435005 Hubei city of Huangshi Province under the new land Road No. 65 smelting Patentee before: HUBEI XINYING ENVIRONMENTAL TECHNOLOGY CO., LTD. Patentee before: Daye Nonferrous Metals Group Holdings Co., Ltd. |