CN118002290B - Scheelite preselection waste disposal process - Google Patents
Scheelite preselection waste disposal process Download PDFInfo
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- CN118002290B CN118002290B CN202410426753.2A CN202410426753A CN118002290B CN 118002290 B CN118002290 B CN 118002290B CN 202410426753 A CN202410426753 A CN 202410426753A CN 118002290 B CN118002290 B CN 118002290B
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- 239000002699 waste material Substances 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000008569 process Effects 0.000 title claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 88
- 238000000498 ball milling Methods 0.000 claims abstract description 83
- 238000012216 screening Methods 0.000 claims abstract description 39
- 238000005498 polishing Methods 0.000 claims abstract description 27
- 238000000227 grinding Methods 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 11
- 239000012141 concentrate Substances 0.000 claims description 49
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000002562 thickening agent Substances 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- 238000003475 lamination Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 239000002023 wood Substances 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 238000011166 aliquoting Methods 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims 1
- 238000005188 flotation Methods 0.000 abstract description 15
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 238000009825 accumulation Methods 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 4
- 238000007517 polishing process Methods 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 29
- 229910052721 tungsten Inorganic materials 0.000 description 29
- 239000010937 tungsten Substances 0.000 description 29
- 230000001276 controlling effect Effects 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 13
- 238000011084 recovery Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910000617 Mangalloy Inorganic materials 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000006056 electrooxidation reaction Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
- 238000005303 weighing Methods 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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/22—Lining for containers
-
- 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
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of ore processing, in particular to a scheelite preselection waste disposal process. A scheelite preselection waste disposal process comprises the following steps: crushing and grading scheelite raw ore and grinding; high-frequency screening of ball-milling ore pulp; reselecting the products on the screen; and (5) treating the waste tailings and the waste middlings. According to the invention, the scheelite raw ore is subjected to ore grinding, grading, overflow and coarse polishing, then the process of screening and gravity separation waste polishing is adopted for pre-separation waste polishing, and the integrated automatic waste polishing process is adopted in the whole process, so that the scheelite raw ore is convenient to use, labor is saved, the ore grinding is properly coarsened by controlling the ball milling material ratio of the particle size of-0.074 mm, the processing capacity of the raw ore is increased, the ore grinding overgrinding phenomenon and the accumulation and conveying cost of tailings are reduced, the pre-separation efficiency is high, the waste polishing rate and the grade of the selected ore are effectively improved under the condition that the metal amount of the selected ore is basically unchanged, and the ore amount of the selected ore is reduced, so that the flotation cost is reduced.
Description
Technical Field
The invention relates to the technical field of ore processing, in particular to a scheelite preselection waste disposal process.
Background
Tungsten is a metal element with high melting point, high density, small expansion coefficient and good heat conduction and electric conduction performance, is commonly used in the fields of industrial metal processing, material manufacturing and the like, is also commonly used for manufacturing daily necessities such as electronic products, lighting lamps and the like, and has wide application value.
The tungsten ore resources are abundant in reserve, more than 20 tungsten ores and tungsten-containing ores are found, but only scheelite and scheelite have mining economic values, in recent years, due to the continuous increase of service life and mining depth of mines, high-quality tungsten ore resources are increasingly reduced, the raw ore grade of tungsten ore is gradually reduced, and the mixing of surrounding rock waste rock in the mining process is added, so that improvement research on pre-selection waste discarding operation of tungsten ore is necessary, the property difference between tungsten ore and other impurities is fully utilized, the raw ore selection grade is improved, and the load of subsequent operation is reduced.
The existing tungsten ore preselection waste throwing main method comprises a manual sorting method, an X-ray preselection technology and a strong magnetic waste throwing technology, wherein the manual sorting method has good waste throwing effect on massive tungsten ores, the ore dressing cost is low, but the waste throwing rate is obvious depending on whether the color of tungsten ores is different from that of waste stones or not, the manual efficiency is low, the X-ray preselection technology can rapidly and accurately analyze the crystal distribution condition of minerals in tungsten ores, the preselection speed is high, the efficiency is high, but the influence on throwing is reduced due to the fact that the entering granularity needs to be strictly controlled, variables are easy to appear, the waste throwing rate is not high, the process flow of the strong magnetic waste throwing technology is simple, the environmental pollution is small, but great limitation exists, and the waste throwing effect is poor when calcium-containing gangue minerals in tungsten ores are more.
Disclosure of Invention
In order to solve the technical defects, the invention researches a scheelite preselection waste disposal process which has high preselection efficiency and can effectively improve the grade of the selected ore and the waste disposal rate.
A scheelite preselection waste disposal process comprises the following steps:
S1: crushing classification and grinding treatment of scheelite raw ore
Performing three-section one-closed-circuit crushing on scheelite raw ore to obtain three-grade ore materials, performing three-section one-closed-circuit first-section crushing on large-grade heavy-return ore materials, adding medium-grade ore materials from a second section for crushing, screening and combining to obtain ore materials, mounting a curved magnetic plate on the outer cylinder wall of a ball mill to cover the outer cylinder wall of the ball mill, firstly adding iron powder into the ball mill for ball milling, forming an iron powder layer with the thickness of 20-30mm on a lining plate of the inner cylinder wall of the ball mill, adding the ore materials for coarse grinding, and performing graded overflow polishing to ensure that the overflow materials with the particle size of-0.074 mm account for 50-55% of the total materials to obtain ball milling ore pulp;
S2: high-frequency screening of ball-milling ore pulp
Sending the ball-milling ore pulp into a slag separation sieve to remove the skin wood dust impurities, then adjusting the concentration of the ball-milling ore pulp, sequentially stranding the ball-milling ore pulp through a trisection ore device and a penta-aliquoting ore device to obtain stranding ball-milling ore pulp, controlling the screening treatment capacity of a high-frequency vibrating screen, carrying out high-frequency screening on the stranding ball-milling ore pulp to obtain an oversize product and an undersize product, collecting the oversize product for later use, concentrating the undersize product through a thickener, and then conveying the undersize product to a stirring barrel to prepare for subsequent sorting operation;
s3: reselection of oversize products
Adding water into the oversize product to obtain oversize ore pulp, dividing the oversize ore pulp into 27 strands by a trisection ore device, respectively polishing each strand in a spiral chute, adjusting the bandwidth of chute concentrate to be 4-4.5cm, controlling the bandwidth of middling to be 11.5-12cm, controlling the processing capacity of each chute to be 0.8-0.9t/h, obtaining waste-polishing concentrate, waste-polishing middling and waste-polishing tailings, and concentrating the waste-polishing concentrate after being combined with the undersize product;
S4: treatment of waste tailings and waste middlings
And carrying out vibration dehydration on the waste throwing tailings to obtain dehydrated waste throwing tailings and dewatering screen undersize ore pulp, conveying the dewatered waste throwing tailings to a temporary storage yard, merging the dewatering screen undersize ore pulp with waste throwing middlings, carrying out dewatering screen double-layer high-frequency fine screening to obtain oversize materials and undersize materials, merging the undersize materials with waste throwing concentrate, concentrating, and preparing for subsequent sorting work.
Further, the crushing classification and grinding treatment of the scheelite raw ore in the step S1 comprises the following steps:
S1.1: crushing scheelite raw ore by adopting a three-section one-closed circuit, wherein the granularity of ore feeding is less than or equal to 550mm, and sieving after crushing to obtain ore materials with three particle sizes of-15 mm, -40+15mm and +40 mm;
S1.2: carrying out three-section one-closed crushing on the ore material with the size of +40mm and the scheelite raw ore, adding the ore material with the size of-40+15mm from the second section for crushing again, and merging the ore material with the size of-15 mm after secondary screening to obtain the ore material;
S1.3: a curved surface magnetic plate with the magnetic force of 18-20N/m 2 is arranged on the outer cylinder wall of the ball mill, so that the curved surface magnetic plate is covered on the outer cylinder wall of the ball mill, firstly, iron powder is added into the ball mill for ball milling, the iron powder is uniformly adhered on a lining plate of the inner cylinder wall of the ball mill, an iron powder layer with the thickness of 20-30mm is formed, mineral aggregate is conveyed into the ball mill for coarse milling, and grading is carried out through a hydrocyclone, thus settled sand and overflow materials are obtained, the settled sand is returned to the ball milling until the overflow materials with the particle size of-0.074 mm account for 50-55% of the total materials, and ball milling ore pulp is obtained.
Further, the high-frequency screening of the ball-milling ore pulp in the step S2 comprises the following steps:
S2.1: the ball-milling ore pulp is sent into a slag separation sieve through a conveying belt, the slag separation sieve enters a pump pool I after the impurities of the shell wood dust are removed, the concentration of the ball-milling ore pulp is adjusted to 40-45% by adding production water, the ball-milling ore pulp is conveyed to a trisection ore separator through a pump to be divided into three strands, and the three trisection ore separators are respectively conveyed to a five trisection ore separator to be divided into fifteen strands, so that the stranding ball-milling ore pulp is obtained;
s2.2: and continuously conveying the stranding ball-milling ore pulp to a high-frequency vibrating screen through a conveying belt to screen, controlling the screening treatment capacity to be 11-18t/h, obtaining an oversize product and an undersize product, collecting the oversize product for later use, automatically flowing the undersize product to a thickener through an undersize pipeline of the high-frequency vibrating screen, concentrating until the water content is 45-50%, conveying the mixture to a stirring barrel, and preparing for subsequent screening operation.
Further, the step S3 of the reselection operation of the oversize products comprises the following steps:
s3.1: adding process water into an oversize product to obtain oversize ore pulp with the concentration of 25-35%, dividing the oversize ore pulp into 3 strands through a trisection ore device, dividing the 3 strands of oversize ore pulp into 9 strands through 3 trisection ore devices, dividing the 9 strands of oversize ore pulp into 27 strands through 9 trisection ore devices, respectively conveying each strand into a spiral chute, adjusting the bandwidth of chute concentrate to be 4-4.5cm, controlling the bandwidth of middling to be 11.5-12cm, controlling the processing capacity of each chute to be 0.8-0.9t/h, and performing spiral chute polishing to obtain polished waste concentrate, polished waste middling and polished waste tailings;
S3.2: the waste concentrate enters a pump pool II and is conveyed to a pipeline under a high-frequency vibrating screen, and the waste concentrate and the product under the screen flow to a thickener together for concentration.
Further, the step S4 of disposing the waste tailings and disposing the waste middlings comprises the following steps:
S4.1: the waste-throwing tailings automatically flow into a dewatering screen through a tailings pipeline to carry out vibration dewatering, so that the water content in the waste-throwing tailings is 16-20%, dewatering waste-throwing tailings and ore pulp under the dewatering screen are obtained, the dewatering waste-throwing tailings enter a rotary belt conveyor and are conveyed to a temporary storage yard, and the ore pulp under the dewatering screen is conveyed to a spiral chute to be combined with waste-throwing middlings;
s4.2: the waste throwing middlings are produced from a spiral chute and then enter a pump pool III, and then are conveyed to a dewatering screen double-layer high-frequency fine screen, the screen mesh size is 0.18-0.2mm, so that oversize materials and undersize materials are obtained, the undersize materials flow into the pump pool II and are combined with waste throwing concentrates and conveyed to an undersize pipeline of a high-frequency vibrating screen for concentration, the follow-up screening work is prepared, and the oversize materials flow into a dewatering screen double-layer high-frequency fine screen communicated with a tailing pipeline.
Further, in the step S1.1, three-section closed-circuit crushing operation is that a jaw crusher is adopted for coarse crushing, a cone crusher is adopted for medium crushing, and a vertical shaft hammer crusher is adopted for fine crushing.
Further, the screening device in the step S1.1 is a YAH3060 vibrating screen.
Further, the name and parameters of the high-frequency vibrating screen in the step S2.2 are 2SG48-60W-5STK five-layer high-frequency fine screen, the screen hole size is 0.18mm, and the inclination angle of the screen surface is 17 degrees.
Further, the thickener in step S2.2 is a brary 56m thickener.
Further, the dewatering screen in step S4.1 is a ZKX2445 type linear vibrating screen.
The beneficial effects are that: 1. according to the invention, the scheelite raw ore is subjected to ore grinding, grading, overflow and coarsening, then the process of screening and gravity dressing and waste dressing is adopted for pre-dressing and waste dressing, the integrated automatic waste dressing process is adopted in the whole process, and only the parameters of the used mechanical equipment are set, so that the automatic waste dressing of the scheelite can be realized, the use is convenient, the labor is saved, the ball milling material proportion of the particle size of-0.074 mm is controlled to be 50-55%, the ore grinding is properly coarsened, the processing capability of the raw ore is improved, the overgrinding phenomenon of the ore grinding and the accumulation and conveying cost of tailings are reduced, the pre-dressing efficiency is high, the waste dressing rate and the ore dressing grade are effectively improved under the condition that the metal amount of the ore to be selected is basically unchanged, and the ore amount to be floated is reduced, so that the floatation cost is reduced.
2. According to the invention, the flow of ore pulp is strictly controlled by dividing the ore pulp on the sieve into 27 strands, the interference and mutual collision among ore pulp particles are reduced, the separation efficiency of the ore pulp is improved, meanwhile, the concentrate bandwidth of the spiral chute is regulated to be 4-4.5cm, the middling bandwidth is regulated to be 11.5-12cm, the processing capacity of the ore pulp is reasonably set to be 0.8-0.9t/h by setting the polishing thickness of the spiral chute, and the residence time and the movement speed of each strand of ore pulp in the spiral chute are finely controlled, so that the ore dressing efficiency and the ore sorting grade are improved.
3. According to the invention, ore grinding, grading, overflow and coarse polishing are carried out on scheelite raw ores, the environment is friendly, and the scheelite raw ores subjected to ore grinding, grading, overflow and coarse polishing are subjected to screening and gravity separation and waste polishing, so that the produced tailings are small in size and are directly sold as fine sand-grade ingredients, waste is changed into valuable, the economic benefit of enterprises is increased, and the green sustainable development is realized.
4. According to the invention, the magnetic plate is arranged on the outer cylinder wall of the ball mill, then iron powder is added into the ball mill, and an iron powder layer is formed on the lining plate of the inner cylinder wall, so that the ball milling medium is prevented from directly contacting with the ore pulp and the lining plate in the ball milling process, the mechanical abrasion to the lining plate is greatly reduced, the service life of the lining plate is greatly prolonged, and the replacement frequency of the lining plate of the inner cylinder wall of the ball mill is reduced, thereby improving the continuous production efficiency of the scheelite preselection waste disposal process.
Drawings
FIG. 1 is a flow chart of a scheelite pre-dressing and disposal process used in an embodiment of the invention.
Fig. 2 is a flow chart of an experiment of tungsten flotation in comparative example 1.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A scheelite preselection waste disposal process, as shown in figure 1, comprises the following steps:
S1: crushing classification and grinding treatment of scheelite raw ore
S1.1: crushing scheelite raw ore by adopting a three-section closed circuit, coarse crushing by adopting a jaw crusher, medium crushing by adopting a cone crusher, fine crushing by adopting a vertical shaft type hammer crusher, coarse crushing the raw ore with the granularity less than or equal to 550mm, and screening by adopting a YAH3060 vibrating screen after fine crushing to obtain ore materials with three particle sizes of-15 mm, -40+15mm and +40 mm;
S1.2: carrying out three-section one-closed crushing on the ore material with the size of +40mm and the scheelite raw ore, adding the ore material with the size of-40+15mm from the second section for crushing again, and merging the ore material with the size of-15 mm after secondary screening to obtain the ore material;
S1.3: a curved magnetic plate with the magnetic force of 18N/m 2 is arranged on the outer cylinder wall of the ball mill, so that the curved magnetic plate is covered on the outer cylinder wall of the ball mill, firstly, iron powder is added into the ball mill for ball milling, so that the iron powder is uniformly adhered on a lining plate of the inner cylinder wall of the ball mill, an iron powder layer with the thickness of 20mm is formed, direct contact between a ball milling medium and ore pulp and the lining plate is prevented in the ball milling process, the mechanical abrasion and electrochemical corrosion degree of the lining plate are greatly reduced, the service life of the lining plate is greatly prolonged, ore materials are conveyed into the ball mill for coarse milling, grading is carried out through a hydrocyclone, sand setting and overflow materials are obtained, the sand setting returns to ball milling until the overflow materials with the particle size of-0.074 mm account for 50% of the total materials, ball milling ore pulp is obtained, the ball milling ore pulp is properly coarsened by controlling the ball milling material proportion of the particle size of-0.074 mm, the ore grinding overgrinding phenomenon and the accumulation and conveying cost of tailings are reduced, and the preselection efficiency is high.
S2: high-frequency screening of ball-milling ore pulp
S2.1: the ball-milling ore pulp is sent into a slag separation sieve through a conveying belt, after the impurities of the shell wood dust are removed, the ball-milling ore pulp enters a pump pool I, production water is added to adjust the concentration of the ball-milling ore pulp to 40%, the ball-milling ore pulp is conveyed to a trisection ore separator to be divided into three strands through a pump, and the ball-milling ore pulp is respectively conveyed to three penta-trisection ore separators to be divided into fifteen strands, so that stranding ball-milling ore pulp is obtained;
S2.2: and continuously conveying the stranding ball-milling ore pulp to a five-layer high-frequency fine screen with the size of 0.18mm and the inclination angle of the screen surface of 17 degrees through a conveying belt, controlling the screening treatment capacity to be 12t/h to obtain an oversize product and an undersize product, collecting the oversize product for standby, automatically flowing the undersize product to a 56m thickener through an undersize pipeline of a high-frequency vibrating screen, concentrating until the water content is 45%, conveying the mixture to a stirring barrel, and preparing for subsequent sorting operation.
S3: reselection of oversize products
S3.1: adding process water into an oversize product to obtain oversize ore pulp with the concentration of 25%, dividing the oversize ore pulp into 3 strands through a trisection ore device, dividing the 3 strands of oversize ore pulp into 9 strands through 3 trisection ore devices, dividing the 9 strands of oversize ore pulp into 27 strands through 9 trisection ore devices, respectively conveying each strand into a spiral chute, adjusting the bandwidth of chute concentrate to be 4cm, controlling the bandwidth of middling to be 11.5cm, controlling the treatment capacity of each chute to be 0.8t/h, and performing spiral chute polishing to obtain polished waste concentrate, polished waste middling and polished waste tailings;
S3.2: the waste concentrate enters a pump pool II and is conveyed to a pipeline under a high-frequency vibrating screen, and the waste concentrate and the product under the screen flow to a thickener together for concentration.
S4: treatment of waste tailings and waste middlings
S4.1: the waste-throwing tailings flow into a ZKX2445 type linear vibration dewatering screen through a tailings pipeline to carry out vibration dewatering, so that the water content in the waste-throwing tailings is 16%, dewatering waste-throwing tailings and dewatering screen undersize ore pulp are obtained, the dewatering waste-throwing tailings enter a rotary belt conveyor and are conveyed to a temporary storage yard, and the dewatering screen undersize ore pulp is conveyed to a spiral chute to be combined with waste-throwing middlings;
S4.2: the waste throwing middlings are produced from a spiral chute and then enter a pump pool III, and then are conveyed to a dewatering screen double-lamination high-frequency fine screen, the screen mesh size is 0.18mm, oversize materials and undersize materials are obtained, the undersize materials flow into a pump pool II from the outside and are combined with waste throwing concentrates and conveyed to an undersize pipeline of a high-frequency vibrating screen to be concentrated, the follow-up sorting work is prepared, the oversize materials flow into the dewatering screen double-lamination high-frequency fine screen to be communicated with a tailing pipeline, the whole process adopts an integrated automatic waste throwing process, under the condition that the metal amount of the ore to be selected is basically unchanged, the waste throwing rate and the ore to be selected are effectively improved, the ore amount to be subjected to flotation is reduced, and the flotation cost is reduced.
Example 2
A scheelite preselection waste disposal process, as shown in figure 1, comprises the following steps:
S1: crushing classification and grinding treatment of scheelite raw ore
S1.1: crushing scheelite raw ore by adopting a three-section closed circuit, coarse crushing by adopting a jaw crusher, medium crushing by adopting a cone crusher, fine crushing by adopting a vertical shaft type hammer crusher, coarse crushing the raw ore with the granularity less than or equal to 550mm, and screening by adopting a YAH3060 vibrating screen after fine crushing to obtain ore materials with three particle sizes of-15 mm, -40+15mm and +40 mm;
S1.2: carrying out three-section one-closed crushing on the ore material with the size of +40mm and the scheelite raw ore, adding the ore material with the size of-40+15mm from the second section for crushing again, and merging the ore material with the size of-15 mm after secondary screening to obtain the ore material;
S1.3: a curved magnetic plate with the magnetic force of 18N/m 2 is arranged on the outer cylinder wall of the ball mill, so that the curved magnetic plate is covered on the outer cylinder wall of the ball mill, firstly, iron powder is added into the ball mill for ball milling, so that the iron powder is uniformly adhered on a lining plate of the inner cylinder wall of the ball mill, an iron powder layer with the thickness of 30mm is formed, direct contact between a ball milling medium and ore pulp and the lining plate is prevented in the ball milling process, the mechanical abrasion and electrochemical corrosion degree of the lining plate are greatly reduced, the service life of the lining plate is greatly prolonged, ore materials are conveyed into the ball mill for coarse milling, grading is carried out through a hydrocyclone, sand setting and overflow materials are obtained, the sand setting returns to ball milling until the overflow materials with the particle size of-0.074 mm account for 55% of the total materials, ball milling ore pulp is obtained, the ball milling ore pulp is properly coarsened by controlling the ball milling material proportion of the particle size of-0.074 mm, the ore grinding overgrinding phenomenon and the accumulation and conveying cost of tailings are reduced, and the preselection efficiency is high.
S2: high-frequency screening of ball-milling ore pulp
S2.1: the ball-milling ore pulp is sent into a slag separation sieve through a conveying belt, the slag separation sieve enters a pump pool I after the impurities of the shell wood dust are removed, the concentration of the ball-milling ore pulp is adjusted to be 45% by adding production water, and the ball-milling ore pulp is conveyed to a trisection ore separator to be divided into three strands by a pump and is respectively conveyed to three penta-trisection ore separators to be divided into fifteen strands to obtain stranding ball-milling ore pulp;
S2.2: and continuously conveying the stranding ball-milling ore pulp to a five-layer high-frequency fine screen with the size of 0.18mm and the inclination angle of the screen surface of 17 degrees through a conveying belt, controlling the screening treatment capacity to be 12t/h to obtain an oversize product and an undersize product, collecting the oversize product for standby, automatically flowing the undersize product to a 56m thickener through an undersize pipeline of a high-frequency vibrating screen, concentrating until the water content is 50%, conveying the mixture to a stirring barrel, and preparing for subsequent sorting operation.
S3: reselection of oversize products
S3.1: adding process water into an oversize product to obtain oversize ore pulp with the concentration of 35%, dividing the oversize ore pulp into 3 strands through a trisection ore device, dividing the 3 strands of oversize ore pulp into 9 strands through 3 trisection ore devices, dividing the 9 strands of oversize ore pulp into 27 strands through 9 trisection ore devices, respectively conveying each strand into a spiral chute, adjusting the bandwidth of chute concentrate to be 4cm, controlling the bandwidth of middling to be 11.5cm, controlling the treatment capacity of each chute to be 0.8t/h, and performing spiral chute polishing to obtain polished waste concentrate, polished waste middling and polished waste tailings;
S3.2: the waste concentrate enters a pump pool II and is conveyed to a pipeline under a high-frequency vibrating screen, and the waste concentrate and the product under the screen flow to a thickener together for concentration.
S4: treatment of waste tailings and waste middlings
S4.1: the waste-throwing tailings flow into a ZKX2445 type linear vibration dewatering screen through a tailings pipeline to carry out vibration dewatering, so that the water content in the waste-throwing tailings is 20%, dewatering waste-throwing tailings and dewatering screen undersize ore pulp are obtained, the dewatering waste-throwing tailings enter a rotary belt conveyor and are conveyed to a temporary storage yard, and the dewatering screen undersize ore pulp is conveyed to a spiral chute to be combined with waste-throwing middlings;
S4.2: the waste throwing middlings are produced from a spiral chute and then enter a pump pool III, and then are conveyed to a dewatering screen double-lamination high-frequency fine screen, the screen mesh size is 0.18mm, oversize materials and undersize materials are obtained, the undersize materials flow into a pump pool II from the outside and are combined with waste throwing concentrates and conveyed to an undersize pipeline of a high-frequency vibrating screen to be concentrated, the follow-up sorting work is prepared, the oversize materials flow into the dewatering screen double-lamination high-frequency fine screen to be communicated with a tailing pipeline, the whole process adopts an integrated automatic waste throwing process, under the condition that the metal amount of the ore to be selected is basically unchanged, the waste throwing rate and the ore to be selected are effectively improved, the ore amount to be subjected to flotation is reduced, and the flotation cost is reduced.
Example 3
A scheelite preselection waste disposal process, as shown in figure 1, comprises the following steps:
S1: crushing classification and grinding treatment of scheelite raw ore
S1.1: crushing scheelite raw ore by adopting a three-section closed circuit, coarse crushing by adopting a jaw crusher, medium crushing by adopting a cone crusher, fine crushing by adopting a vertical shaft type hammer crusher, coarse crushing the raw ore with the granularity less than or equal to 550mm, and screening by adopting a YAH3060 vibrating screen after fine crushing to obtain ore materials with three particle sizes of-15 mm, -40+15mm and +40 mm;
S1.2: carrying out three-section one-closed crushing on the ore material with the size of +40mm and the scheelite raw ore, adding the ore material with the size of-40+15mm from the second section for crushing again, and merging the ore material with the size of-15 mm after secondary screening to obtain the ore material;
S1.3: a curved magnetic plate with the magnetic force of 20N/m 2 is arranged on the outer cylinder wall of the ball mill, so that the curved magnetic plate is covered on the outer cylinder wall of the ball mill, firstly, iron powder is added into the ball mill for ball milling, so that the iron powder is uniformly adhered on a lining plate of the inner cylinder wall of the ball mill, an iron powder layer with the thickness of 20mm is formed, direct contact between a ball milling medium and ore pulp and the lining plate is prevented in the ball milling process, the mechanical abrasion and electrochemical corrosion degree of the lining plate are greatly reduced, the service life of the lining plate is greatly prolonged, ore materials are conveyed into the ball mill for coarse milling, grading is carried out through a hydrocyclone, sand setting and overflow materials are obtained, the sand setting returns to ball milling until the overflow materials with the particle size of-0.074 mm account for 50% of the total materials, ball milling ore pulp is obtained, the ball milling ore pulp is properly coarsened by controlling the ball milling material proportion of the particle size of-0.074 mm, the ore grinding overgrinding phenomenon and the accumulation and conveying cost of tailings are reduced, and the preselection efficiency is high.
S2: high-frequency screening of ball-milling ore pulp
S2.1: the ball-milling ore pulp is sent into a slag separation sieve through a conveying belt, after the impurities of the shell wood dust are removed, the ball-milling ore pulp enters a pump pool I, production water is added to adjust the concentration of the ball-milling ore pulp to 40%, the ball-milling ore pulp is conveyed to a trisection ore separator to be divided into three strands through a pump, and the ball-milling ore pulp is respectively conveyed to three penta-trisection ore separators to be divided into fifteen strands, so that stranding ball-milling ore pulp is obtained;
S2.2: and continuously conveying the stranding ball-milling ore pulp to a five-layer high-frequency fine screen with the size of 0.18mm and the inclination angle of the screen surface of 17 degrees through a conveying belt, controlling the screening treatment capacity to be 18t/h to obtain an oversize product and an undersize product, collecting the oversize product for standby, automatically flowing the undersize product to a 56m thickener through an undersize pipeline of a high-frequency vibrating screen, concentrating until the water content is 45%, conveying the mixture to a stirring barrel, and preparing for subsequent sorting operation.
S3: reselection of oversize products
S3.1: adding process water into an oversize product to obtain oversize ore pulp with the concentration of 25%, dividing the oversize ore pulp into 3 strands through a trisection ore device, dividing the 3 strands of oversize ore pulp into 9 strands through 3 trisection ore devices, dividing the 9 strands of oversize ore pulp into 27 strands through 9 trisection ore devices, respectively conveying each strand into a spiral chute, adjusting the bandwidth of chute concentrate to be 4.5cm, controlling the bandwidth of middling to be 12cm, controlling the processing capacity of each chute to be 0.9t/h, and performing spiral chute polishing to obtain polished waste concentrate, polished waste middling and polished waste tailings;
S3.2: the waste concentrate enters a pump pool II and is conveyed to a pipeline under a high-frequency vibrating screen, and the waste concentrate and the product under the screen flow to a thickener together for concentration.
S4: treatment of waste tailings and waste middlings
S4.1: the waste-throwing tailings flow into a ZKX2445 type linear vibration dewatering screen through a tailings pipeline to carry out vibration dewatering, so that the water content in the waste-throwing tailings is 16%, dewatering waste-throwing tailings and dewatering screen undersize ore pulp are obtained, the dewatering waste-throwing tailings enter a rotary belt conveyor and are conveyed to a temporary storage yard, and the dewatering screen undersize ore pulp is conveyed to a spiral chute to be combined with waste-throwing middlings;
S4.2: the waste throwing middlings are produced from a spiral chute and then enter a pump pool III, and then are conveyed to a dewatering screen double-lamination high-frequency fine screen, the screen mesh size is 0.2mm, oversize materials and undersize materials are obtained, the undersize materials flow into a pump pool II from the outside and are combined with waste throwing concentrates and conveyed to an undersize pipeline of a high-frequency vibrating screen to be concentrated, the follow-up sorting work is prepared, the oversize materials flow into the dewatering screen double-lamination high-frequency fine screen to be communicated with a tailing pipeline, the whole process adopts an integrated automatic waste throwing process, under the condition that the metal amount of the ore to be selected is basically unchanged, the waste throwing rate and the ore to be selected are effectively improved, the ore amount to be subjected to flotation is reduced, and the flotation cost is reduced.
Comparative example 1
Comparative example 1 is different from example 1 in that comparative example 1 only subjects the scheelite raw ore to the ore grinding classifying overflow treatment, and does not subject to the screening-reselection coarse polishing treatment.
The tungsten flotation is carried out by taking 100kg of the waste concentrate produced in the example 1, the example 2 and the example 3 and 100kg of the graded overflow product produced in the comparative example 1 respectively, the experimental flow of the tungsten flotation is shown in the figure 2, and the yield, the tungsten grade and the tungsten recovery rate of the tungsten rough concentrate and the roughing tailings are recorded respectively to form tables, and the waste concentrate is shown in the tables 1,2,3 and 4, so that the yield, the tungsten grade and the tungsten recovery rate are improved.
Conclusion: after screening, gravity separation and coarse polishing, the grade of the polished waste concentrate is improved, and the flotation operation grade and recovery rate are both improved.
Table 1: example 1 tungsten flotation effect of polished spent concentrate
| Example 1 | Yield% | WO3 grade% | WO3 recovery% |
| Tungsten rough concentrate | 9.08 | 3.55 | 90.78 |
| Rougher tailings | 90.92 | 0.036 | 9.22 |
| Waste concentrate | 100 | 0.355 | 100 |
Table 2: example 2 tungsten flotation effect of polished spent concentrate
| Example 2 | Yield% | WO3 grade% | WO3 recovery% |
| Tungsten rough concentrate | 9.03 | 3.49 | 90.69 |
| Rougher tailings | 90.88 | 0.035 | 9.18 |
| Waste concentrate | 100 | 0.355 | 100 |
Table 3: example 3 tungsten flotation effect of polished spent concentrate
| Example 3 | Yield% | WO3 grade% | WO3 recovery% |
| Tungsten rough concentrate | 9.12 | 3.58 | 90.83 |
| Rougher tailings | 90.97 | 0.038 | 9.28 |
| Waste concentrate | 100 | 0.355 | 100 |
Table 4: comparative example 1 tungsten flotation effect of polished spent concentrate
| Comparative example 1 | Yield% | WO3 grade% | WO3 recovery% |
| Tungsten rough concentrate | 8.44 | 3.02 | 89.12 |
| Rougher tailings | 91.56 | 0.034 | 10.88 |
| Split overflow product | 100 | 0.286 | 100 |
Comparative example 2
Comparative example 2 is different from example 1 in that comparative example 2 is free from the operation of mounting a curved magnetic plate on the outer cylindrical wall of the ball mill in step S1, and the remaining steps are the same as example 1.
Taking two pieces of manganese steel lining plates with the mass of 50kg, and installing the same shape and size in the ball mill of the example 1 and the ball mill of the comparative example 2, taking out the manganese steel lining plates for weighing after normal production for 3 days, 7 days, 14 days, 30 days and 60 days respectively by using the corresponding ball mills, recording data and preparing a table, wherein as shown in table 5, the mass change of the manganese steel lining plates installed in the ball mill of the example 1 is small, and the mass change of the manganese steel lining plates installed in the ball mill of the comparative example 2 is large.
Conclusion: the curved magnetic plate is arranged on the outer cylinder wall of the ball mill, and the operation of pouring iron powder into the ball mill can reduce the mechanical abrasion of ball milling media and ore pulp on the lining plate, and reduce the replacement frequency of the lining plate on the inner cylinder wall of the ball mill, thereby improving the continuous production efficiency of the scheelite preselection waste throwing process.
Table 5: quality of manganese steel lining board after different production time
| Mass/kg | For 3 days | For 7 days | 14 Days | For 30 days | For 60 days |
| Example 1 | 49.99 | 49.94 | 49.81 | 49.68 | 49.24 |
| Comparative example 2 | 49.97 | 49.89 | 48.82 | 46.65 | 43.26 |
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. The scheelite preselection waste disposal process is characterized by comprising the following steps of:
S1: crushing classification and grinding treatment of scheelite raw ore
Performing three-section one-closed-circuit crushing on scheelite raw ore to obtain three-grade ore materials, performing three-section one-closed-circuit first-section crushing on large-grade heavy-return ore materials, adding medium-grade ore materials from a second section for crushing, screening and combining to obtain ore materials, mounting a curved magnetic plate on the outer cylinder wall of a ball mill to cover the outer cylinder wall of the ball mill, firstly adding iron powder into the ball mill for ball milling, forming an iron powder layer with the thickness of 20-30mm on a lining plate of the inner cylinder wall of the ball mill, adding the ore materials for coarse grinding, and performing graded overflow polishing to ensure that the overflow materials with the particle size of-0.074 mm account for 50-55% of the total materials to obtain ball milling ore pulp;
S2: high-frequency screening of ball-milling ore pulp
Sending the ball-milling ore pulp into a slag separation sieve to remove the skin wood dust impurities, then adjusting the concentration of the ball-milling ore pulp, sequentially stranding the ball-milling ore pulp through a trisection ore device and a penta-aliquoting ore device to obtain stranding ball-milling ore pulp, controlling the screening treatment capacity of a high-frequency vibrating screen, carrying out high-frequency screening on the stranding ball-milling ore pulp to obtain an oversize product and an undersize product, collecting the oversize product for later use, concentrating the undersize product through a thickener, and then conveying the undersize product to a stirring barrel to prepare for subsequent sorting operation;
s3: reselection of oversize products
Adding water into the oversize product to obtain oversize ore pulp, dividing the oversize ore pulp into 27 strands by a trisection ore device, respectively polishing each strand in a spiral chute, adjusting the bandwidth of chute concentrate to be 4-4.5cm, controlling the bandwidth of middling to be 11.5-12cm, controlling the processing capacity of each chute to be 0.8-0.9t/h, obtaining waste-polishing concentrate, waste-polishing middling and waste-polishing tailings, and concentrating the waste-polishing concentrate after being combined with the undersize product;
S4: treatment of waste tailings and waste middlings
And carrying out vibration dehydration on the waste throwing tailings to obtain dehydrated waste throwing tailings and dewatering screen undersize ore pulp, conveying the dewatered waste throwing tailings to a temporary storage yard, merging the dewatering screen undersize ore pulp with waste throwing middlings, carrying out dewatering screen double-layer high-frequency fine screening to obtain oversize materials and undersize materials, merging the undersize materials with waste throwing concentrate, concentrating, and preparing for subsequent sorting work.
2. The scheelite preselection waste disposal process according to claim 1, wherein the crushing classification and grinding treatment of the scheelite raw ore in step S1 comprises the following steps:
S1.1: crushing scheelite raw ore by adopting a three-section one-closed circuit, wherein the granularity of ore feeding is less than or equal to 550mm, and sieving after crushing to obtain ore materials with three particle sizes of-15 mm, -40+15mm and +40 mm;
S1.2: carrying out three-section one-closed crushing on the ore material with the size of +40mm and the scheelite raw ore, adding the ore material with the size of-40+15mm from the second section for crushing again, and merging the ore material with the size of-15 mm after secondary screening to obtain the ore material;
S1.3: a curved surface magnetic plate with the magnetic force of 18-20N/m 2 is arranged on the outer cylinder wall of the ball mill, so that the curved surface magnetic plate is covered on the outer cylinder wall of the ball mill, firstly, iron powder is added into the ball mill for ball milling, the iron powder is uniformly adhered on a lining plate of the inner cylinder wall of the ball mill, an iron powder layer with the thickness of 20-30mm is formed, mineral aggregate is conveyed into the ball mill for coarse milling, and grading is carried out through a hydrocyclone, thus settled sand and overflow materials are obtained, the settled sand is returned to the ball milling until the overflow materials with the particle size of-0.074 mm account for 50-55% of the total materials, and ball milling ore pulp is obtained.
3. The scheelite preselection waste disposal process according to claim 1, wherein the high frequency screening of the ball milling slurry in step S2 comprises the steps of:
S2.1: the ball-milling ore pulp is sent into a slag separation sieve through a conveying belt, the slag separation sieve enters a pump pool I after the impurities of the shell wood dust are removed, the concentration of the ball-milling ore pulp is adjusted to 40-45% by adding production water, the ball-milling ore pulp is conveyed to a trisection ore separator through a pump to be divided into three strands, and the three trisection ore separators are respectively conveyed to a five trisection ore separator to be divided into fifteen strands, so that the stranding ball-milling ore pulp is obtained;
s2.2: and continuously conveying the stranding ball-milling ore pulp to a high-frequency vibrating screen through a conveying belt to screen, controlling the screening treatment capacity to be 11-18t/h, obtaining an oversize product and an undersize product, collecting the oversize product for later use, automatically flowing the undersize product to a thickener through an undersize pipeline of the high-frequency vibrating screen, concentrating until the water content is 45-50%, conveying the mixture to a stirring barrel, and preparing for subsequent screening operation.
4. The scheelite preselection waste disposal process according to claim 1, wherein the step S3 of the re-selection of the oversize products comprises the steps of:
s3.1: adding process water into an oversize product to obtain oversize ore pulp with the concentration of 25-35%, dividing the oversize ore pulp into 3 strands through a trisection ore device, dividing the 3 strands of oversize ore pulp into 9 strands through 3 trisection ore devices, dividing the 9 strands of oversize ore pulp into 27 strands through 9 trisection ore devices, respectively conveying each strand into a spiral chute, adjusting the bandwidth of chute concentrate to be 4-4.5cm, controlling the bandwidth of middling to be 11.5-12cm, controlling the processing capacity of each chute to be 0.8-0.9t/h, and performing spiral chute polishing to obtain polished waste concentrate, polished waste middling and polished waste tailings;
S3.2: the waste concentrate enters a pump pool II and is conveyed to a pipeline under a high-frequency vibrating screen, and the waste concentrate and the product under the screen flow to a thickener together for concentration.
5. The scheelite preselection waste disposal process according to claim 1, wherein the step S4 of disposing the waste tailings and the waste middlings comprises the steps of:
S4.1: the waste-throwing tailings automatically flow into a dewatering screen through a tailings pipeline to carry out vibration dewatering, so that the water content in the waste-throwing tailings is 16-20%, dewatering waste-throwing tailings and ore pulp under the dewatering screen are obtained, the dewatering waste-throwing tailings enter a rotary belt conveyor and are conveyed to a temporary storage yard, and the ore pulp under the dewatering screen is conveyed to a spiral chute to be combined with waste-throwing middlings;
S4.2: the waste throwing middlings are output from the spiral chute and then enter a pump pool III, and then are conveyed to a dewatering screen double-lamination high-frequency fine screen, the screen mesh size is 0.18-0.2mm, so that oversize materials and undersize materials are obtained, the undersize materials automatically flow into the pump pool II and are combined with waste throwing concentrates and conveyed to an undersize pipeline of a high-frequency vibrating screen for concentration, and subsequent screening work is prepared.
6. The scheelite preselection waste disposal process according to claim 2, wherein the three-stage closed circuit crushing operation in step S1.1 is a jaw crusher for coarse crushing, a cone crusher for medium crushing and a vertical shaft hammer crusher for fine crushing.
7. The scheelite preselection waste disposal process according to claim 2, wherein the screening device in step S1.1 is a YAH3060 vibrating screen.
8. A scheelite preselection waste disposal process according to claim 3, wherein the name and parameters of the high frequency vibrating screen in step S2.2 are 2SG48-60W-5STK five-layer high frequency fine screen, the screen size is 0.18mm, and the screen surface inclination angle is 17 °.
9. A scheelite preselection waste disposal process according to claim 3, wherein the thickener in step S2.2 is a branstar 56m thickener.
10. The scheelite preselection waste disposal process according to claim 5, wherein the dewatering screen in step S4.1 is a ZKX2445 type linear vibrating screen.
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| KR101576928B1 (en) * | 2014-07-14 | 2015-12-14 | 한국지질자원연구원 | Beneficiation method of high grade scheelite ore by preprocessing |
| KR101576927B1 (en) * | 2014-07-14 | 2015-12-14 | 한국지질자원연구원 | Beneficiation method of high grade scheelite ore |
| CN111841871A (en) * | 2020-06-24 | 2020-10-30 | 紫金矿业集团股份有限公司 | Beneficiation method for low-grade tungsten ore |
| CN111715399B (en) * | 2020-06-28 | 2021-12-24 | 广东省科学院资源利用与稀土开发研究所 | Pretreatment method of high-calcium high-magnesium fine-particle embedded scheelite |
| CN214347167U (en) * | 2020-12-03 | 2021-10-08 | 威海市海王旋流器有限公司 | Scheelite heavy medium tailing discarding and flotation combined separation system |
| CN113976306A (en) * | 2021-11-02 | 2022-01-28 | 中南大学 | Pre-waste-throwing system and process for complex refractory low-grade molybdenum ore heavy-medium beneficiation |
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