CN105032581A - Smashing and classifying technology for molybdenite - Google Patents
Smashing and classifying technology for molybdenite Download PDFInfo
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- CN105032581A CN105032581A CN201510401481.1A CN201510401481A CN105032581A CN 105032581 A CN105032581 A CN 105032581A CN 201510401481 A CN201510401481 A CN 201510401481A CN 105032581 A CN105032581 A CN 105032581A
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Abstract
The invention provides a smashing and classifying technology for molybdenite. The technology comprises the following steps that first, a gyratory crusher is used for conducting coarse crushing treatment on the molybdenite, so that coarsely-crushed mineral powder is obtained; then primary screening is carried out, and accordingly primary oversize products and primary screen underflow are obtained; second, a cone crusher is used for conducting intermediate crushing treatment on the primary oversize products, so that intermediately-crushed mineral powder is obtained; then secondary screening is carried out, and accordingly secondary oversize products and secondary screen underflow are obtained; third, the primary screen underflow and the secondary screen underflow are evenly mixed and then added into a high-pressure grinding roller to be smashed, so that smashed mineral powder is obtained; and fourth, the smashed mineral powder is classified, and hence smashed and classified products with the granularity D55 being smaller than or equal to 0.074 mm are obtained. By the adoption of the smashing and classifying technology, the technical problems that the process is long, the number of devices is large, smashing and classifying production cost is high, classification efficiency is low, easy-to-select size fraction content of the mineral is low, and the molybdenum selection recovery rate is affected in the prior art are effectively solved. The application prospect is broad.
Description
Technical field
The invention belongs to molybdenite processing technology field, be specifically related to a kind of comminution grading technology of molybdenite.
Background technology
At present, the broken crushing process that employing three section is closed circuit mostly in molybdenum ore dressing plant, grind grading adopts ball mill to add the grinding grading technique of cyclone or spiral classifier, former rock processing flow process is: first, molybdenite raw ore carries out coarse crushing through PXZ1200/160 gyratory crusher, coarse crushing ore discharge product once sieves, it is broken during the product introduction PYB2200 standard cone crusher once sieve being greater than 25mm carries out, in broken ore discharge product carry out regrading, product introduction PYD2200 short head cone crusher regrading sieve being greater than 25mm carries out in small, broken bits, ore discharge product in small, broken bits returns regrading, regrading screenings together with once sieving screenings and merging as crushed product, product maximum particle size 25mm, wherein D
88≤ 15mm.Crushed product feeds MQG Φ 3.6 × 4m ball mill through belt conveyer and carries out ore grinding, and ball milling ore discharge product carries out classification through 2FLC Φ 2.4m spiral classifier and FX500 a cluster cyclone, and after classification, coarse fraction returns ball mill and regrinds, and meets granularity D
52the fine fraction of≤0.074mm enters floatation system as the final products of grind grading and carries out flotation.
But due to the long flow path of existing technique, table of equipment cover is many, and repair and maintenance workload is large, and power consume is high, and steel ball consumption is large, and comminution totle drilling cost is high.Crushed product size is large, and classification efficiency is poor, and graded product or coarse fraction content too much, or easily produce overground, and centre easily selects grade (-0.074mm ~+0.019mm) content low, only has about 1%, has a strong impact on and select molybdenum recovery.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, provides a kind of comminution grading technology of molybdenite.This technique efficiently solves that existing technological process is long, table of equipment cover is many, comminution classification production cost is high, classification efficiency is low, ore easily select grain size content few, affect and select the technical problems such as molybdenum recovery, have broad application prospects.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of comminution grading technology of molybdenite, is characterized in that, this technique comprises the following steps:
Step one, adopt gyratory crusher to carry out coarse crushing process to molybdenite, obtain coarse crushing breeze, then adopt aperture to be that the screen cloth of 50mm once sieves coarse crushing breeze, obtain an oversize and a screenings;
Step 2, adopt cone crusher to carry out an oversize described in step one in broken process, obtain middle muck powder, then adopt aperture to be that the screen cloth centering muck powder of 50mm carries out regrading, obtain secondary oversize and secondary screenings;
Step 3, secondary screenings described in a screenings described in step one and step 2 is mixed after add in high-pressure roller mill, be 7.5MPa ~ 8.5MPa at rolling pressure, roller spacing is carry out comminution process under the condition of 14mm ~ 16mm, obtains comminution breeze;
Step 4, the breeze of comminution described in step 3 to be sent in air classifier, be carry out classification process under the condition of 750r/min ~ 850r/min at rotating speed, obtain granularity D
55the comminution graded product of≤0.074mm, all the other are defective work, are returned by defective work in step 3 and carry out comminution process.
The comminution grading technology of above-mentioned a kind of molybdenite, is characterized in that, the gape width of gyratory crusher described in step one is 160mm.
The comminution grading technology of above-mentioned a kind of molybdenite, is characterized in that, the gape width of cone crusher described in step 2 is 30mm ~ 35mm.
The comminution grading technology of above-mentioned a kind of molybdenite, is characterized in that, carry out circular treatment to the oversize of secondary described in step 2, detailed process is: secondary oversize is returned broken process in carrying out in cone crusher.
The present invention compared with prior art has the following advantages:
1, the present invention can replace 10 MQG Φ 3.6 × 4m ball mills, 10 2FLC Φ 2.4m spiral classifiers, 6 PYD-2200 short head cone crushers of original technique with 2 CLM260/160 high-pressure roller mills and 2 KYR28000 air classifiers, eliminate operation in small, broken bits and ball milling-graded operation, substantially reduce technological process, decrease table of equipment cover very significantly.
2, present invention significantly reduces equipment repair and maintenance intensity, reduce spare parts consumption, reduce production cost.Spare part and ball milling steel ball energy consumption reduce by 5.6 yuan/ton of raw ores.
3, the present invention improves classification efficiency dramatically, classification efficiency brings up to 90% by 45% of grader, improve 45 percentage points, change milling ore granularmetric composition simultaneously, the comminution graded product grade entering flotation accounts for 52% by original-0.074 millimeter and brings up to 55%, wherein easily selects grade (-0.074mm ~+0.019mm) content to be increased to 9% by 1%.
4, invention increases and select molybdenum recovery, improve 2.23 percentage points by testing its rate of recovery, beneficiating efficiency improves 1.15 percentage points, ore fecund molybdenum concntrate improve effects per ton 1.8 yuan/ton of raw ores.
5, remarkable in economical benefits of the present invention, the ore dressing plant per diem processing 40,000 tons, ore calculates, and the present invention can improve effects 9,768 ten thousand yuan/year.
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Embodiment 1
Composition graphs 1, the comminution grading technology of the present embodiment molybdenite comprises the following steps:
Step one, the gyratory crusher adopting gape width to be 160mm carry out coarse crushing process to molybdenite, obtain coarse crushing breeze, then adopt aperture to be that the screen cloth of 50mm once sieves coarse crushing breeze, obtain an oversize and a screenings;
Broken process during the cone crusher that step 2, employing gape width are 30mm carries out an oversize described in step one, obtain middle muck powder, then adopt aperture to be that the screen cloth centering muck powder of 50mm carries out regrading, obtain secondary oversize and secondary screenings; Secondary oversize is returned broken process in carrying out in cone crusher;
Step 3, secondary screenings described in a screenings described in step one and step 2 is mixed after add in high-pressure roller mill, be 8.0MPa at rolling pressure, roller spacing is carry out comminution process under the condition of 15mm, obtains comminution breeze;
Step 4, the breeze of comminution described in step 3 to be sent in air classifier, be carry out classification process under the condition of 800r/min at rotating speed, obtain granularity D
55the comminution graded product of≤0.074mm, all the other granularity D
55> 0.074mm's is defective work, is returned by defective work in high-pressure roller mill described in step 3 and carries out comminution process.
After testing, the classification efficiency of the present embodiment brings up to 90% by 45% of traditional handicraft, and a point engine efficiency is greatly improved.And, the present embodiment changes the granularmetric composition of milling ore, the comminution graded product grade of final acquisition accounts for 52% by-0.074 millimeter of traditional handicraft and brings up to 55%, wherein easily selects grade (-0.074mm ~+0.019mm) content to be increased to 9% by 1%.In a word, the present embodiment eliminates operation in small, broken bits and ball milling-graded operation, substantially reduces technological process, very substantial increase operating efficiency, decrease table of equipment cover, reduce equipment repair and maintenance intensity, decrease spare parts consumption, reduce production cost, be with a wide range of applications.
Embodiment 2
Composition graphs 1, the comminution grading technology of the present embodiment molybdenite comprises the following steps:
Step one, the gyratory crusher adopting gape width to be 160mm carry out coarse crushing process to molybdenite, obtain coarse crushing breeze, then adopt aperture to be that the screen cloth of 50mm once sieves coarse crushing breeze, obtain an oversize and a screenings;
Broken process during the cone crusher that step 2, employing gape width are 35mm carries out an oversize described in step one, obtain middle muck powder, then adopt aperture to be that the screen cloth centering muck powder of 50mm carries out regrading, obtain secondary oversize and secondary screenings; Secondary oversize is returned broken process in carrying out in cone crusher;
Step 3, secondary screenings described in a screenings described in step one and step 2 is mixed after add in high-pressure roller mill, be 7.5MPa at rolling pressure, roller spacing is carry out comminution process under the condition of 16mm, obtains comminution breeze;
Step 4, the breeze of comminution described in step 3 to be sent in air classifier, be carry out classification process under the condition of 850r/min at rotating speed, obtain granularity D
55the comminution graded product of≤0.074mm, all the other granularity D
55> 0.074mm's is defective work, is returned by defective work in high-pressure roller mill described in step 3 and carries out comminution process.
After testing, the classification efficiency of the present embodiment brings up to 90% by 45% of traditional handicraft, and a point engine efficiency is greatly improved.And, the present embodiment changes the granularmetric composition of milling ore, the comminution graded product grade of final acquisition accounts for 52% by-0.074 millimeter of traditional handicraft and brings up to 55%, wherein easily selects grade (-0.074mm ~+0.019mm) content to be increased to 9% by 1%.In a word, the present embodiment eliminates operation in small, broken bits and ball milling-graded operation, substantially reduces technological process, very substantial increase operating efficiency, decrease table of equipment cover, reduce equipment repair and maintenance intensity, decrease spare parts consumption, reduce production cost, be with a wide range of applications.
Embodiment 3
Composition graphs 1, the comminution grading technology of the present embodiment molybdenite comprises the following steps:
Step one, the gyratory crusher adopting gape width to be 160mm carry out coarse crushing process to molybdenite, obtain coarse crushing breeze, then adopt aperture to be that the screen cloth of 50mm once sieves coarse crushing breeze, obtain an oversize and a screenings;
Broken process during the cone crusher that step 2, employing gape width are 32mm carries out an oversize described in step one, obtain middle muck powder, then adopt aperture to be that the screen cloth centering muck powder of 50mm carries out regrading, obtain secondary oversize and secondary screenings; Secondary oversize is returned broken process in carrying out in cone crusher;
Step 3, secondary screenings described in a screenings described in step one and step 2 is mixed after add in high-pressure roller mill, be 8.5MPa at rolling pressure, roller spacing is carry out comminution process under the condition of 14mm, obtains comminution breeze;
Step 4, the breeze of comminution described in step 3 to be sent in air classifier, be carry out classification process under the condition of 750r/min at rotating speed, obtain granularity D
55the comminution graded product of≤0.074mm, all the other granularity D
55> 0.074mm's is defective work, is returned by defective work in high-pressure roller mill described in step 3 and carries out comminution process.
After testing, the classification efficiency of the present embodiment brings up to 90% by 45% of traditional handicraft, and a point engine efficiency is greatly improved.And, the present embodiment changes the granularmetric composition of milling ore, the comminution graded product grade of final acquisition accounts for 52% by-0.074 millimeter of traditional handicraft and brings up to 55%, wherein easily selects grade (-0.074mm ~+0.019mm) content to be increased to 9% by 1%.In a word, the present embodiment eliminates operation in small, broken bits and ball milling-graded operation, substantially reduces technological process, very substantial increase operating efficiency, decrease table of equipment cover, reduce equipment repair and maintenance intensity, decrease spare parts consumption, reduce production cost, be with a wide range of applications.
In the present invention, described gyratory crusher, cone crusher, high-pressure roller mill and air classifier are existing commercial equipment, the gyratory crusher adopted in various embodiments of the present invention is preferably PXZ1200/160 gyratory crusher, the gyratory crusher adopted is preferably PYB2200 standard round cone crusher, the high-pressure roller mill adopted is preferably CLM260/160 high-pressure roller mill, and the air classifier adopted is preferably KYR28000 air classification system.
The above is only preferred embodiment of the present invention, not imposes any restrictions the present invention.Every above embodiment is done according to invention technical spirit any simple modification, change and equivalence change, all still belong in the protection domain of technical solution of the present invention.
Claims (4)
1. a comminution grading technology for molybdenite, is characterized in that, this technique comprises the following steps:
Step one, adopt gyratory crusher to carry out coarse crushing process to molybdenite, obtain coarse crushing breeze, then adopt aperture to be that the screen cloth of 50mm once sieves coarse crushing breeze, obtain an oversize and a screenings;
Step 2, adopt cone crusher to carry out an oversize described in step one in broken process, obtain middle muck powder, then adopt aperture to be that the screen cloth centering muck powder of 50mm carries out regrading, obtain secondary oversize and secondary screenings;
Step 3, secondary screenings described in a screenings described in step one and step 2 is mixed after add in high-pressure roller mill, be 7.5MPa ~ 8.5MPa at rolling pressure, roller spacing is carry out comminution process under the condition of 14mm ~ 16mm, obtains comminution breeze;
Step 4, the breeze of comminution described in step 3 to be sent in air classifier, be carry out classification process under the condition of 750r/min ~ 850r/min at wheel speed, obtain granularity D
55the comminution graded product of≤0.074mm, all the other are defective work, are returned by defective work in step 3 and carry out comminution process.
2. the comminution grading technology of a kind of molybdenite according to claim 1, is characterized in that, the gape width of gyratory crusher described in step one is 160mm.
3. the comminution grading technology of a kind of molybdenite according to claim 1, is characterized in that, the gape width of cone crusher described in step 2 is 30mm ~ 35mm.
4. the comminution grading technology of a kind of molybdenite according to claim 1, is characterized in that, carry out circular treatment to the oversize of secondary described in step 2, detailed process is: secondary oversize is returned broken process in carrying out in cone crusher.
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| CN106552708A (en) * | 2016-11-16 | 2017-04-05 | 南京天合嘉能再生资源有限公司 | A kind of slag breeze production technology |
| CN108940540A (en) * | 2018-09-27 | 2018-12-07 | 华北理工大学 | A method of using impact grinding quick obtaining ore |
| CN111298933A (en) * | 2018-12-12 | 2020-06-19 | 中蓝连海设计研究院有限公司 | Multi-stage crushing method for blocky solids |
| CN112495558A (en) * | 2020-11-16 | 2021-03-16 | 北京建工资源循环利用投资有限公司 | Slotted soil recovery method |
| CN112517915A (en) * | 2020-11-18 | 2021-03-19 | 广东先导稀材股份有限公司 | Preparation method and system of metallic antimony/bismuth powder |
| CN113286658A (en) * | 2018-11-27 | 2021-08-20 | 福特斯丘金属集团 | Apparatus and method for treating iron ore |
| CN114405647A (en) * | 2022-02-08 | 2022-04-29 | 孙勇 | Preparation system of building regeneration fine aggregate and computer storage medium |
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| CN114405647B (en) * | 2022-02-08 | 2023-09-22 | 广东新瑞龙生态建材有限公司 | Preparation system of building recycled fine aggregate and computer storage medium |
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