CN109569837A - A kind of rock processing handling ambrose alloy sulfide ore - Google Patents
A kind of rock processing handling ambrose alloy sulfide ore Download PDFInfo
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- CN109569837A CN109569837A CN201811279830.7A CN201811279830A CN109569837A CN 109569837 A CN109569837 A CN 109569837A CN 201811279830 A CN201811279830 A CN 201811279830A CN 109569837 A CN109569837 A CN 109569837A
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- 239000011435 rock Substances 0.000 title claims abstract description 43
- 239000000956 alloy Substances 0.000 title claims abstract description 20
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 20
- -1 alloy sulfide Chemical class 0.000 title claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 16
- 238000003801 milling Methods 0.000 claims abstract description 14
- 238000005188 flotation Methods 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims description 30
- 239000004576 sand Substances 0.000 claims description 15
- 230000005484 gravity Effects 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000007667 floating Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 19
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 12
- 239000011707 mineral Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000009826 distribution Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 3
- 208000001254 Occupational Disease Diseases 0.000 abstract description 2
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000000498 ball milling Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
Abstract
The invention discloses a kind of rock processings for handling ambrose alloy sulfide ore, belong to metalliferous mineral processing technique field.The specific process step of the rock processing are as follows: Semi-Autogenous → wet screening → hard rock is broken → cyclone classification → ball grinder graded.The present invention is crushed using Semi-Autogenous equipment, change the original crumbling method of ore, simplify production procedure, compared with the rock processing of conventional vulcanized ambrose alloy ore, ore milling product particle size stable, grain class distribution is more reasonable, reduce the excessive crushing of metalliferous mineral, alleviate pollution of the irony to valuable mineral, stronger condition is created for flotation, -74~+10 μm of grain size contents for being suitble to floatation process enriching and recovering are made to increase by 14%, and -10 μm of grain size contents for being not suitable for floatation process processing reduce about 5%；Equipment number is few, and production cost is low；Reduce ore having bad luck in production link back and forth, avoid pollution of the dust to worker's operating environment, reduces personnel's occupational disease risk.
Description
Technical field
The present invention relates to metalliferous mineral processing technique fields, and in particular to a kind of new ore rock processing, in particular to
A kind of rock processing handling ambrose alloy sulfide ore.
Background technique
The purpose of mineral processing is to be enriched with from primary ore to the maximum extent, recycle valuable mineral.In traditional mineral
In process, main rock processing are as follows: crushing and screening+grind grading.Therefore, the degree of grinding of ore directly affects ore dressing
Technical-economic index.If granularity is excessively thick, the degree sufficiently dissociated with gangue mineral is not achieved in target minreal, is unable to satisfy postorder
The technical requirements sorted；Particle size after cracking is meticulous, and target minreal, which is crossed, to be crushed and enter sorting operation jointly with gangue mineral, makes
It can not be sorted out from gangue mineral at target minreal, the purpose of useful resources enrichment and high efficiente callback is not achieved.
By taking traditional rock processing of certain ambrose alloy sulfide ore as an example: the ore grain size of mining reaches the ratio of+500mm
Account for about 70% or so, after one section of coarse crushing, product granularity generally can reach 250mm hereinafter, by belt-conveying enter in broken, granularity
Reach 60mm hereinafter, then being sieved, oversize enters fine crushing, feed of the undersize as ore grinding；Oversize into
After row is fine crushing, product granularity reaches 12mm, subsequently into screening；Undersize enters grinding operation, and oversize return is fine crushing,
It is recycled with this.Broken qualified products enter a ball milling, and the ore discharge of ball milling carries out scalping, after scalping and heavy
Sand returns to a ball milling, and the overflow mine after scalping carries out secondary grading.The overflow mine of secondary grading enters flotation operation, and two
The sand setting of secondary classification enters secondary ball milling；Ore discharge returns to secondary grading after secondary ball milling, and overflow mine enters flotation operation, and sand setting returns
Return secondary ball milling (see figure 1).
From figure 1 it appears that traditional broken process is three section of one closed circuit flow, Grinding procedure is two sections of closed circuit streams
Journey.Existing particular problem are as follows:
1, complex technical process, work flow is long, and ore cycle-index is more, causes comminution product fineness low and grade forms not
Rationally, unstable.As shown in table 1, grinding fineness 65.6% is suitable for -74~+15 μm of grains of floatation process processing in qualified grain size
Grade content only accounts for 28.24%, and -15 μm or less the rank contents for being not suitable for floatation process processing account for 37.36%.
The traditional comminution process product grain class distribution content table (%) of table 1
2, number of devices is more, and management difficulty is big, and energy consumption is high, and producing cost is high.
3, crushing stage, ore are being transported and are being crushed, generating a large amount of dust in screening process, generating to personnel health very big
It influences.
Summary of the invention
The purpose of the invention is to overcome the defect of above-mentioned prior art, provide that a kind of product quality is high, at low cost, people
The rock processing of the highly-safe processing ambrose alloy sulfide ore of member.
The purpose of the present invention is what is be achieved through the following technical solutions: a kind of rock processing handling ambrose alloy sulfide ore,
Specifically includes the following steps:
(1) Semi-Autogenous: ambrose alloy sulfide ore is given after being tentatively crushed to granularity≤250mm using belt conveyer in underground
Enter semi-autogenous mill and carry out ore grinding, output semi-autogenous mill ore discharge, which is weight percentage the mine of concentration 65-70%
Slurry；
(2) wet screening: feeding wet screening machine for the semi-autogenous mill ore discharge gravity flow in step (1) and sieve, difficult on sieve
With the hard rock ground, lower sieve is fine product, granularity≤6mm ore particle accounting 80-90% in the fine product；
(3) hard rock is broken: hard rock in step (2) is fed into hard rock crusher by belt conveyer and is crushed, mine-supplying quantity 46-92
Ton/when, output granularity≤15mm crushed product, the crushed product return to semi-autogenous mill by belt conveyer and carry out circulation mill
Mine；
(4) cyclone classification: being pumped into hydrocyclone for fine product in step (2) and be classified, and cyclone pressure is 0.7-
0.75Mpa, output overflow mine and sand setting, overflow mine add floating agent and are used as flotation after mixing evenly from stirred tank is flow to
Raw material；
(5) ball grinder graded: sand setting gravity flow in step (4) being fed into ball mill and carries out ore grinding, ball mill milling medium pack completeness is
30-35%, ore discharge product are weight percentage the ore pulp of concentration 58-65%, which is pumped into hydrocyclone and is classified.
As the further preferred of technical solution of the present invention, in above-mentioned steps (1), when ore grinding, mine-supplying quantity is 460 tons/it is small
When, 75 % of ore milling concentration, ore grinding work index is 15.9-17.65Kwh/t, and milling medium pack completeness is 8-15%, ore grinding water supply water
Pressure is 0.35-0.45Mpa.The consumption of semi-autogenous mill steel ball and wear liner degree are minimum under this condition, semi-autogenous mill power, electricity
Stream etc. transports key parameter and stablizes, and hard rock quantum of output is constant, creates for subsequent ball grinder graded link stable operation good
Condition.
In step (4), overflow mine is weight percentage the ore pulp of concentration 25-27%, and partial size is 0.074mm's in the ore pulp
Ore particle accounting 70-75%；Sand setting is weight percentage the ore pulp of concentration 65-75%, ore particle partial size≤6mm in the ore pulp.At this
Ball milling+cyclone classification link ore pulp amount is stablized under part, and Pulp pump runs smoothly, cyclone classification pressure oscillation is smaller, classification
Effect is best, creates good condition for the stable operation of subsequent flotation.
Rock processing of the invention is crushed using Semi-Autogenous equipment, changes the original crumbling method of ore, is simplified
Production procedure has the advantage that compared with the rock processing of conventional vulcanized ambrose alloy ore
1, ore milling product particle size stable, grain class distribution is more reasonable, reduces the excessive crushing of metalliferous mineral, alleviates irony to having
With the pollution of mineral, stronger condition is created for flotation.It is 460 ton/hours, 70 % of ore milling concentration in mine-supplying quantity, mill
Mine work index be 17.65Kwh/t, milling medium pack completeness be 15%, ore grinding water-feeding pressure be 0.45Mpa under conditions of to eddy flow
The sampling of device overflow mine, carries out grain class distribution test, and test result is as shown in table 2.
As can be seen from the table, rock processing section of the present invention makes -74~+10 μm of grades for being suitble to floatation process enriching and recovering
Content increases by 14%, and -10 μm of grain size contents for being not suitable for floatation process processing reduce about 5%.
The 2 Semi-Autogenous rock processing ore milling product grain class distribution content table (%) of the present invention of table
2, present device number of units is few, and configuration is convenient, and land occupation is few, with low investment.
3, production process facilitates management, high production efficiency, and production cost is low, it is easy to accomplish automatically controls, operating personnel's labor
Fatigue resistance decline.
4, reduce ore to have bad luck back and forth in production link, avoid the production of the clogging of dust and intermediate link
It is raw, worker's operating environment is thoroughly improved, personnel's occupational disease risk is reduced.
Detailed description of the invention
Fig. 1 is the rock processing flow chart of existing ambrose alloy sulfide ore；
Fig. 2 is the rock processing flow chart of ambrose alloy sulfide ore of the present invention.
Specific embodiment
It is described in further detail below by rock processing of the specific embodiment to ambrose alloy sulfide ore of the present invention.
Process flow is referring to Fig. 2 in the following embodiments of the present invention.
Embodiment 1
Mine-supplying quantity is 460 ton/hours, and 100~250 mm of feed preparation unit size accounts for 30%, and ore nickel grade is 0.85%, the Pu Shi of ore
Hardness is 12.5.
Step (1): first by the above grade, hardness ambrose alloy sulfide ore using belt conveyer feed semi-autogenous mill into
Row ore grinding, ore grinding work index are 17.65 Kwh/t, and grinding medium filling ratio 15%, Semi-Autogenous feed pressure is 0.45Mpa.Output half
Autogenous tumbling mill ore discharge, the semi-autogenous mill ore discharge are weight percentage the ore pulp of concentration 70%；
Step (2): the semi-autogenous mill ore discharge gravity flow in step (1) is fed into wet screening machine and is sieved, is difficult to grind on sieve
Broken hard rock, lower sieve is fine product, granularity≤6mm ore particle accounting 80% in the fine product；
Step (3): feeding hard rock crusher by belt conveyer for the hard rock (measuring on sieve) in step (2) and be crushed, and gives mine
92 tons of amount/when, output granularity≤15mm crushed product, the crushed product returns to semi-autogenous mill by belt conveyer and is followed
Ring ore grinding；
Step (4): fine product in step (2) (the lower amount of sieve) is pumped into hydrocyclone and is classified, cyclone pressure is
0.71Mpa, output overflow mine and sand setting, overflow mine add floating agent and are used as flotation after mixing evenly from stirred tank is flow to
Raw material；
Step (5): feeding ball mill for sand setting gravity flow in step (4) and carry out ore grinding, and ball mill milling medium pack completeness is 30%,
Ore discharge product is weight percentage the ore pulp of concentration 58%, which is pumped into hydrocyclone and is classified.
It is crushed → ball-milling technology by this Semi-Autogenous → hard rock, the overflow ore particle grade composition of output is as shown in table 3 below:
Overflow ore particle grade composition (%) in 3 embodiment 1 of table
As seen from the above table: the size fraction ranges suitable for flotation are as follows: -74~10 μm, proportion average out to 60.85% reaches one section and floats
It is elected to be the grade requirement of industry 60%.
Embodiment 2
Mine-supplying quantity is 460 ton/hours, and 100~250 mm of feed preparation unit size accounts for 25%, and ore nickel grade is 0.78%, the Pu Shi of ore
Hardness is 12.
Step (1): first by the above grade, hardness ambrose alloy sulfide ore using belt conveyer feed semi-autogenous mill into
Row ore grinding, ore grinding work index are 16.7 Kwh/t, and grinding medium filling ratio 12%, Semi-Autogenous feed pressure is 0.43Mpa.Output half
Autogenous tumbling mill ore discharge, the semi-autogenous mill ore discharge are weight percentage the ore pulp of concentration 68%；
Step (2): the semi-autogenous mill ore discharge gravity flow in step (1) is fed into wet screening machine and is sieved, is difficult to grind on sieve
Broken hard rock, lower sieve is fine product, granularity≤6mm ore particle accounting 85% in the fine product；
Step (3): feeding hard rock crusher by belt conveyer for the hard rock (measuring on sieve) in step (2) and be crushed, and gives mine
69 tons of amount/when, output granularity≤15mm crushed product, the crushed product returns to semi-autogenous mill by belt conveyer and is followed
Ring ore grinding；
Step (4): fine product in step (2) (the lower amount of sieve) is pumped into hydrocyclone and is classified, cyclone pressure is
0.73Mpa, output overflow mine and sand setting, overflow mine add floating agent and are used as flotation after mixing evenly from stirred tank is flow to
Raw material；
Step (5): feeding ball mill for sand setting gravity flow in step (4) and carry out ore grinding, and ball mill milling medium pack completeness is 33%,
Ore discharge product is weight percentage the ore pulp of concentration 62%, which is pumped into hydrocyclone and is classified.
It is crushed → ball-milling technology by this Semi-Autogenous → hard rock, the overflow grade composition of output is as shown in table 4 below:
Overflow ore particle grade composition (%) in 4 embodiment 2 of table
As seen from the above table: the size fraction ranges suitable for flotation are as follows: -74~10 μm, proportion average out to 62.29% reaches one section and floats
It is elected to be the grade requirement of industry 60%.
Embodiment 3
Mine-supplying quantity is 460 ton/hours, and 100~250 mm of feed preparation unit size accounts for 20%, and ore nickel grade is 0.65%, the Pu Shi of ore
Hardness is 11.7.
Step (1): first by the above grade, hardness ambrose alloy sulfide ore using belt conveyer feed semi-autogenous mill into
Row ore grinding, ore grinding work index are 17.65 Kwh/t, and grinding medium filling ratio 10%, Semi-Autogenous feed pressure is 0.41Mpa.Output half
Autogenous tumbling mill ore discharge, the semi-autogenous mill ore discharge are weight percentage the ore pulp of concentration 65%；
Step (2): the semi-autogenous mill ore discharge gravity flow in step (1) is fed into wet screening machine and is sieved, is difficult to grind on sieve
Broken hard rock, lower sieve is fine product, granularity≤6mm ore particle accounting 90% in the fine product；
Step (3): feeding hard rock crusher by belt conveyer for the hard rock (measuring on sieve) in step (2) and be crushed, and gives mine
46 tons of amount/when, output granularity≤15mm crushed product, the crushed product returns to semi-autogenous mill by belt conveyer and is followed
Ring ore grinding；
Step (4): fine product in step (2) (the lower amount of sieve) is pumped into hydrocyclone and is classified, cyclone pressure is
0.75Mpa, output overflow mine and sand setting, overflow mine add floating agent and are used as flotation after mixing evenly from stirred tank is flow to
Raw material；
Step (5): feeding ball mill for sand setting gravity flow in step (4) and carry out ore grinding, and ball mill milling medium pack completeness is 35%,
Ore discharge product is weight percentage the ore pulp of concentration 65%, which is pumped into hydrocyclone and is classified.
It is crushed → ball-milling technology by this Semi-Autogenous → hard rock, the overflow grade composition of output is as shown in table 5 below:
Overflow ore particle grade composition (%) in 5 embodiment 3 of table
As seen from the above table: the size fraction ranges suitable for flotation are as follows: -74~10 μm, proportion average out to 60.33% reaches one section and floats
It is elected to be the grade requirement of industry 60%.
Claims (3)
1. a kind of rock processing for handling ambrose alloy sulfide ore, which comprises the following steps:
(1) Semi-Autogenous: ambrose alloy sulfide ore is given after being tentatively crushed to granularity≤250mm using belt conveyer in underground
Enter semi-autogenous mill and carry out ore grinding, output semi-autogenous mill ore discharge, which is weight percentage the mine of concentration 65-70%
Slurry；
(2) wet screening: feeding wet screening machine for the semi-autogenous mill ore discharge gravity flow in step (1) and sieve, difficult on sieve
With the hard rock ground, lower sieve is fine product, granularity≤6mm ore particle accounting 80-90% in the fine product；
(3) hard rock is broken: hard rock in step (2) is fed into hard rock crusher by belt conveyer and is crushed, mine-supplying quantity 46-92
Ton/when, output granularity≤15mm crushed product, the crushed product return to semi-autogenous mill by belt conveyer and carry out circulation mill
Mine；
(4) cyclone classification: being pumped into hydrocyclone for fine product in step (2) and be classified, and cyclone pressure is 0.7-
0.75Mpa, output overflow mine and sand setting, overflow mine add floating agent and are used as flotation after mixing evenly from stirred tank is flow to
Raw material；
(5) ball grinder graded: sand setting gravity flow in step (4) being fed into ball mill and carries out ore grinding, ball mill milling medium pack completeness is
30-35%, ore discharge product are weight percentage the ore pulp of concentration 58-65%, which is pumped into hydrocyclone and is classified.
2. a kind of rock processing for handling ambrose alloy sulfide ore as described in claim 1, which is characterized in that in step (1), mill
When mine, the mine-supplying quantity is 460 ton/hours, 75 % of ore milling concentration, and ore grinding work index is 15.9-17.65Kwh/t, milling medium
Pack completeness is 8-15%, and ore grinding water-feeding pressure is 0.35-0.45Mpa.
3. a kind of rock processing for handling ambrose alloy sulfide ore as claimed in claim 1 or 2, which is characterized in that step (4)
In, the overflow mine is weight percentage the ore pulp of concentration 25-27%, and partial size is the ore particle accounting 70- of 0.074mm in the ore pulp
75%；Sand setting is weight percentage the ore pulp of concentration 65-75%, ore particle partial size≤6mm in the ore pulp.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279830.7A CN109569837B (en) | 2018-10-30 | 2018-10-30 | Crushing and grinding process for treating nickel-copper sulfide ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279830.7A CN109569837B (en) | 2018-10-30 | 2018-10-30 | Crushing and grinding process for treating nickel-copper sulfide ore |
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|---|---|
| CN109569837A true CN109569837A (en) | 2019-04-05 |
| CN109569837B CN109569837B (en) | 2020-12-11 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109939789A (en) * | 2019-05-05 | 2019-06-28 | 林阳辉 | A kind of ore pulp coarse granule screening grinding device |
| CN110116054A (en) * | 2019-05-10 | 2019-08-13 | 玉溪大红山矿业有限公司 | A kind of method for floating of low-grade stockyard high oxidation copper raw ore |
| CN110215997A (en) * | 2019-06-18 | 2019-09-10 | 日昌升集团有限公司 | A kind of Machine-made Sand lapicide's skill of self raising flour dirt |
| CN110215996A (en) * | 2019-06-18 | 2019-09-10 | 日昌升集团有限公司 | A kind of mechanism sandstone production technology |
| CN110215998A (en) * | 2019-06-18 | 2019-09-10 | 日昌升集团有限公司 | A kind of simplified mechanism sandstone production technology |
| CN110339936A (en) * | 2019-07-09 | 2019-10-18 | 黑龙江多宝山铜业股份有限公司 | A kind of beneficiation method of extremely frigid zones particle sulphur oxygen mixed type copper mine |
| CN111686906A (en) * | 2020-05-24 | 2020-09-22 | 中国瑞林工程技术股份有限公司 | Efficient energy-saving crushing and grinding process for stage ore grinding |
| CN112264182A (en) * | 2020-09-29 | 2021-01-26 | 新疆紫金锌业有限公司 | Crushing and grinding process of low-hardness raw ore |
| CN113492055A (en) * | 2020-04-02 | 2021-10-12 | 中国瑞林工程技术股份有限公司 | Mineral processing technology for treating copper-containing pyrite |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109939789A (en) * | 2019-05-05 | 2019-06-28 | 林阳辉 | A kind of ore pulp coarse granule screening grinding device |
| CN110116054A (en) * | 2019-05-10 | 2019-08-13 | 玉溪大红山矿业有限公司 | A kind of method for floating of low-grade stockyard high oxidation copper raw ore |
| CN110116054B (en) * | 2019-05-10 | 2021-07-02 | 玉溪大红山矿业有限公司 | Flotation method for high-copper oxide raw ore in low-grade storage yard |
| CN110215997A (en) * | 2019-06-18 | 2019-09-10 | 日昌升集团有限公司 | A kind of Machine-made Sand lapicide's skill of self raising flour dirt |
| CN110215996A (en) * | 2019-06-18 | 2019-09-10 | 日昌升集团有限公司 | A kind of mechanism sandstone production technology |
| CN110215998A (en) * | 2019-06-18 | 2019-09-10 | 日昌升集团有限公司 | A kind of simplified mechanism sandstone production technology |
| CN110339936A (en) * | 2019-07-09 | 2019-10-18 | 黑龙江多宝山铜业股份有限公司 | A kind of beneficiation method of extremely frigid zones particle sulphur oxygen mixed type copper mine |
| CN113492055A (en) * | 2020-04-02 | 2021-10-12 | 中国瑞林工程技术股份有限公司 | Mineral processing technology for treating copper-containing pyrite |
| CN111686906A (en) * | 2020-05-24 | 2020-09-22 | 中国瑞林工程技术股份有限公司 | Efficient energy-saving crushing and grinding process for stage ore grinding |
| CN112264182A (en) * | 2020-09-29 | 2021-01-26 | 新疆紫金锌业有限公司 | Crushing and grinding process of low-hardness raw ore |
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|---|---|
| CN109569837B (en) | 2020-12-11 |
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