CN102921521B - 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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- CN102921521B CN102921521B CN201210447871.9A CN201210447871A CN102921521B CN 102921521 B CN102921521 B CN 102921521B CN 201210447871 A CN201210447871 A CN 201210447871A CN 102921521 B CN102921521 B CN 102921521B
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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 copper ore or lead zinc ore 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 the present invention relates in metallurgical mining industry is improved, especially a kind of grind grading method that improves copper mine or plumbous zinc ore disposal ability.
Background technology
At present, in metallurgical mining industry is produced, for the ore-dressing technique on copper mine, plumbous zinc ore mountain, be mainly divided into for two megastages, be grind grading flow process+sort flow process (comprise roughly select, selected etc.).Traditional grinding grading technique flow process is mainly to adopt ball mill to form closed circuit technique with grader or cyclone, be that raw ore enters ball mill, grinding of ball grinder mineral products enter grader or enter cyclone classification through sand pump, defective coarse fraction product after classification returns to 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) be difficult for obtaining thinner Grading Overflow fineness, particularly overflow fineness requirement-0.074mm and account for more than 90% very difficult realization, had a strong impact on follow-up sorting result;
(2) large proportion valuable mineral derichment in sand return, causes valuable mineral overground, and argillization is serious;
(3) classification efficiency is low, and grader is only generally 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 is because of the wearing and tearing of spigot or feed is unstable causes the unstable of grading effect, 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 oversize returns to ball mill by traditional thinking mode, regrinds.This improvement, although guaranteed classification quality, brings 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 oversize poor fluidity, need certain discrepancy in elevation could realize oversize and enter ball mill, increase sand pump, increase energy consumption.
Summary of the invention
Object 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 high frequency fine screen mode additional, reduce grinding machine effect, increase the problems such as power consumption, a kind of grind grading method that improves copper mine or plumbous zinc ore disposal ability is provided.
Concrete scheme of the present invention is: a kind of grind grading method that improves copper mine or plumbous zinc ore disposal ability, first the product introduction ball mill after muck is carried out to ore grinding, ball milling ore discharge is delivered to cyclone sorting through slag stock pump, the sand setting of cyclone returns to ball mill, the overflow of cyclone is that fine-graded product is sent into high frequency vibrating fine screen sorting again through mine distributor, oversize returns and enters slag stock pump, and recirculation enters cyclone sorting; Undersize carries out the follow-up flow process that sorts
Ore pulp in the present invention after 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.
After the sorting of cyclone described in the present invention, the particle diameter of high concentration is greater than 0.5mm particle ore pulp and returns to ball mill and regrind; The particle diameter of low concentration is less than 0.5mm particle ore pulp and sends into high frequency vibrating fine screen screening.
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.
In the present invention, by high frequency vibrating fine screen oversize, directly merge and enter slag stock pump with ore mill ore milling product, can realize the setting height(from bottom) that reduces 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.While oversize returns to cyclone by slag stock pump and dewaters, and solves the instability problem of high frequency shale shaker oversize concentration, and high concentration coarse grain mineral return to ore mill by cyclone.Can guarantee the stability of system mine-supplying quantity and feed ore concentration like this, to reach, improve ore grinding board effect object.
It is large that process of the present invention takes full advantage of cyclone disposal ability, and dehydrating effect is good and the high feature of high frequency vibrating fine screen classification efficiency has improved the classification efficiency of hierarchy system and the grinding efficiency of grinding machine largely.Classification efficiency, up to more than 80%, not only improves easily sorting grain size content more than 10%, also makes ball mill ore grinding platform effect improve more than 5%, and has comprehensively improved system ore grinding disposal ability.In graded product granularmetric composition, each decline of ﹢ 80 orders and ﹣ 400 content reaches more than 5%, reduces over maximum and can obtain the content of granularity and alleviate argillization, is more conducive to follow-up sorting operation.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
The specific embodiment
Referring to Fig. 1, grind grading method of the present invention is: first the product introduction ball mill after muck is carried out to ore grinding, ball milling ore discharge is delivered to cyclone sorting through slag stock pump, the sand setting of cyclone returns to ball mill, the overflow of cyclone is that fine-graded product is sent into high frequency vibrating fine screen sorting again through mine distributor, oversize returns and enters slag stock pump, and recirculation enters cyclone sorting; Undersize carries out the follow-up flow process that sorts
Ore pulp described in the present embodiment after 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.
After the sorting of cyclone described in the present embodiment, the particle diameter of high concentration is greater than 0.5mm particle ore pulp and returns to ball mill and regrind; The particle diameter of low concentration is less than 0.5mm particle ore pulp and sends into high frequency vibrating fine screen screening.
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 (1)
1. a grind grading method that improves copper mine or plumbous zinc ore disposal ability, first the product introduction ball mill after muck is carried out to ball milling, ore pulp after ball milling enters in the spiral circle shaft screen that diameter is Φ 16mm sieve aperture, carry out every slightly, ore pulp after thick enters slag stock pump material pond through chute, and then adopt slag stock pump to deliver to cyclone sorting, the sand setting of cyclone returns to ball mill, it is characterized in that: the overflow of cyclone is that fine-graded product is sent into high frequency vibrating fine screen sorting again through mine distributor, oversize returns and enters slag stock pump, and recirculation enters cyclone sorting; Undersize carries out the follow-up flow process that sorts; After described cyclone sorting, the particle diameter of high concentration is greater than 0.5mm particle ore pulp and returns to ball mill and regrind; The particle diameter of low concentration is less than 0.5mm particle ore pulp and sends into high frequency vibrating fine screen screening; Described ball mill is to select grate ball mill or overflowball mill; 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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| CN201210447871.9A CN102921521B (en) | 2012-11-12 | 2012-11-12 | Ore grinding grading method for improving ore grinding processing capacity |
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| CN201210447871.9A CN102921521B (en) | 2012-11-12 | 2012-11-12 | Ore grinding grading method for improving ore grinding processing capacity |
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| CN103657824A (en) * | 2013-12-16 | 2014-03-26 | 裴寿益 | Ore grinding method |
| CN103934087B (en) * | 2014-04-14 | 2016-06-08 | 尤廷晏 | The treatment process of the middle product produced in a kind of Copper making 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 |
| CN109550566B (en) * | 2018-10-29 | 2021-07-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Ore grinding process capable of reducing ore grinding energy consumption and reducing over-crushing |
| CN111992488B (en) * | 2020-09-17 | 2022-06-17 | 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. |