CN111686927A - Resource utilization method of tungsten ore waste rock and tungsten tailings - Google Patents
Resource utilization method of tungsten ore waste rock and tungsten tailings Download PDFInfo
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- CN111686927A CN111686927A CN202010571632.9A CN202010571632A CN111686927A CN 111686927 A CN111686927 A CN 111686927A CN 202010571632 A CN202010571632 A CN 202010571632A CN 111686927 A CN111686927 A CN 111686927A
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 239000010937 tungsten Substances 0.000 title claims abstract description 130
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000010878 waste rock Substances 0.000 title claims description 15
- 238000012216 screening Methods 0.000 claims abstract description 96
- 239000011435 rock Substances 0.000 claims abstract description 43
- 239000002699 waste material Substances 0.000 claims abstract description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000012141 concentrate Substances 0.000 claims abstract description 33
- 238000003825 pressing Methods 0.000 claims abstract description 28
- 239000010453 quartz Substances 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 13
- 239000011707 mineral Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 230000018044 dehydration Effects 0.000 claims abstract description 6
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 20
- 239000004568 cement Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 16
- 230000005484 gravity Effects 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000001354 calcination Methods 0.000 claims description 11
- 239000012065 filter cake Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 9
- 239000010439 graphite Substances 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 9
- 239000011362 coarse particle Substances 0.000 claims description 8
- 229910052683 pyrite Inorganic materials 0.000 claims description 7
- 239000011028 pyrite Substances 0.000 claims description 7
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 abstract description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 20
- 239000004575 stone Substances 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002910 solid waste Substances 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 241000668854 Howardia biclavis Species 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Images
Classifications
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- 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
-
- 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
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a resource utilization method of tungsten ore waste rocks and tungsten tailings, belonging to the technical field of tungsten ore waste rocks and tungsten tailings recovery, and the method comprises the following steps: (1) pretreatment before screening: coarsely crushing underground tungsten ore waste rocks, mixing the crushed underground tungsten ore waste rocks with manually-selected tungsten ore waste rocks of a concentrating mill, and finely crushing the tungsten ore waste rocks; (2) screening and mineral separation: performing primary screening, wherein the upper layer of the primary screening and the middle layer of the primary screening are respectively subjected to ore dressing through an image concentrator to obtain quartz concentrate and aggregate 1, the lower layer of the primary screening is subjected to secondary screening, the upper layer of the secondary screening is subjected to ore dressing through the image concentrator to obtain quartz concentrate and aggregate 2, and the middle layer of the secondary screening is subjected to ore dressing through the image concentrator to obtain quartz concentrate and aggregate 3; (3) pretreatment before dehydration; (4) screening and reselecting; (5) the concentration and filter pressing is used for solving the technical problems of imperfect recycling process, low recycling and reutilization rate and easy generation of secondary pollution of tungsten ore waste rocks and tungsten tailings.
Description
Technical Field
The invention relates to a resource utilization method of tungsten ore waste rocks and tungsten tailings, and belongs to the technical field of tungsten ore waste rocks and tungsten tailings recovery.
Background
At present, in the process of mining and selecting nonferrous metal tungsten in China, huge quantities of underground tungsten ore waste rocks, hand-selected tungsten ore waste rocks of a concentrating mill and solid waste tungsten tailings can be generated. With the rapid development of the nonferrous metal industry, the expansion of the mining scale of tungsten ores and the extension of the mining history of tungsten ores, the accumulation amount of underground tungsten ore waste rocks, hand-selected tungsten ore waste rocks of ore dressing plants and tungsten tailings also increases year by year, and for a long time, most enterprises are dedicated to mining and processing tungsten ores, and the application of the underground tungsten ore waste rocks, the hand-selected tungsten ore waste rocks of ore dressing plants and the tungsten tailings is less, so that the accumulated solid wastes are basically not utilized, occupy cultivated lands, and need to spend huge resources to build a dumping field and store tailings ponds, which is not beneficial to the coordinated development of the mine environment and the circular economy.
The underground tungsten ore waste rock, the hand-selected tungsten ore waste rock of the concentrating mill and the tungsten tailings are all recyclable resources, if the underground tungsten ore waste rock, the hand-selected tungsten ore waste rock of the concentrating mill and the tungsten tailings can be recycled, the accumulation of solid wastes can be reduced, the occupation of land resources and the pollution to the surrounding environment are reduced, in the prior art, the recycling treatment process for the underground tungsten ore waste rock, the hand-selected tungsten ore waste rock of the concentrating mill and the tungsten tailings is not mature, the solid wastes cannot be fully recycled and classified, the recycling efficiency is low, secondary pollution is easy to generate, the recycling rate is low, and the hidden trouble that the follow-up solid wastes are accumulated and are difficult to treat still exists.
Disclosure of Invention
The invention provides a resource utilization method of tungsten ore waste rocks and tungsten tailings aiming at the defects in the prior art, and aims to solve the technical problems that the recycling process of the tungsten ore waste rocks and the tungsten tailings is imperfect, the recycling rate and the reutilization rate are low, and secondary pollution is easy to generate in the prior art.
The technical scheme for solving the technical problems is as follows: a resource utilization method of tungsten ore waste rocks and tungsten tailings comprises the following steps: (1) pretreatment before screening: roughly crushing underground tungsten ore waste rocks, mixing the crushed underground tungsten ore waste rocks with manually-selected tungsten ore waste rocks of a concentrating mill to obtain a material A, and finely crushing the material A to obtain a material B; (2) screening and mineral separation: screening the material B for the first time, performing ore dressing on the upper layer of the first screening and the middle layer of the first screening respectively through an image concentrator to obtain quartz concentrate and aggregate 1, screening the lower layer of the first screening for the second time, performing ore dressing on the upper layer of the second screening through the image concentrator to obtain quartz concentrate and aggregate 2, and performing ore dressing on the middle layer of the second screening through the image concentrator to obtain quartz concentrate and aggregate 3; (3) pretreatment before dehydration: grading the tungsten tailings to obtain a graded underflow and a graded overflow, wherein the graded underflow is subjected to dewatering screen operation to obtain a dewatering screen upper layer and a dewatering screen lower layer; (4) screening and reselecting: carrying out third screening on the second screened lower layer of the second screening, carrying out gravity separation after water is supplemented to the obtained third screened lower layer, carrying out gravity separation to obtain tungsten concentrate and gravity tailings, carrying out ore washing on the gravity tailings to obtain ore washing overflow and coarse particles, wherein the coarse particles, the third screened upper layer and the dewatering screen upper layer in the step (3) are all made sand; (5) concentration and filter pressing: and (3) concentrating the ore washing overflow in the step (4), the grading overflow in the step (3) and the lower layer of the dewatering screen to obtain a concentrated overflow and a concentrated underflow, wherein the concentrated underflow is subjected to filter pressing to obtain a filtrate and a filter pressing filter cake, and the filtrate and the concentrated overflow are mixed to form backwater.
On the basis of the technical scheme, the invention can be further improved as follows.
And (3) further, after image beneficiation is carried out on the upper layer of the first screening in the step (2) to obtain quartz concentrate, the remaining coarse-grained waste rock is mixed into the material A again to carry out fine crushing operation.
And (3) further, in the step (2), the lower layer is sieved for the first time and then sieved for the second time, and the reshaping equipment adopts a vertical shaft impact crusher or a counterattack crusher.
And (3) further drying the filter pressing filter cake obtained in the step (5) to obtain fine tungsten tailings, wherein the moisture content of the fine tungsten tailings is less than 2%, and mixing the fine tungsten tailings with a mixture to prepare a cement raw material, wherein the mixture comprises carbide slag powder, coal gangue powder, graphite ore tailings, magnetite tailings and pyrite tailings.
Further, the obtained cement raw material is pressed and molded to prepare raw material cakes, then the raw material cakes are calcined, and after the calcination is finished, the material is placed at the normal temperature (15-35 ℃) for rapid cooling to obtain the cement clinker, wherein the calcination temperature is 1330-1380 ℃ and the calcination time is 20-50 min.
Further, the mixture comprises the following components in percentage by weight: carbide slag powder: coal gangue powder: graphite ore tailings: magnetite tailings: the weight ratio of the fine tungsten tailings to the mixed material is 1:9, the-200-mesh content of each component in the mixed material is 87% -92%, and the water content of each component is less than 2%.
Further, the first screening and the second screening in the step (2) both adopt double-layer screens, the grading particle size of an upper-layer screen of the first screening is 30-31.5mm, the grading particle size of a lower-layer screen of the first screening is 19-21mm, the grading particle size of an upper-layer screen of the second screening is 9-11mm, the grading particle size of a lower-layer screen of the second screening is 5mm, and the grading particle size of a third screening in the step (4) is 1-3 mm.
Furthermore, the mesh of the dewatering screen in the step (3) is 2-3mm, and the grading equipment adopts a cyclone or a spiral classifier.
Further, the concentration of the ore pulp after water is added in the screening and gravity separation process in the step (4) is 10% -35%, a shaking table is selected as gravity separation equipment, and a spiral sand washer or a wheel type sand washer is adopted as ore washing equipment.
Further, the concentration equipment in the step (5) adopts a high-efficiency thickener or a deep cone thickener, and the filter pressing equipment adopts a filter press.
The invention has the beneficial effects that: by adopting the pretreatment before screening, screening and mineral separation, pretreatment before dehydration, screening and gravity separation and concentration filter pressing processes, underground tungsten ore waste stones, hand-selected tungsten ore waste stones and tungsten tailings in a mineral separation plant are fully recovered and classified to obtain target products classified into quartz concentrate, tungsten concentrate, machine-made sand, aggregate 1, aggregate 2, aggregate 3 and filter pressing filter cakes, the classification operation is completed while the recovery is carried out through the processes, time and labor are saved, the problems that waste accumulation occupies cultivated land, pollutes the environment and needs huge cost for treatment are solved, the recycling of subsequent direct input production is facilitated, the production efficiency is improved, and the production cost is reduced; the cement clinker is prepared by drying and recycling the filter pressing filter cake, and the underground tungsten ore waste rock generated in the mining and mineral separation production process of the quartz vein tungsten ore, the hand-selected tungsten ore waste rock of a mineral separation plant and the tungsten tailings are all recycled, so that secondary pollution is avoided, the resource utilization rate is improved, a tailing pond and a waste dump for storing the waste rock do not need to be built in a mine, and the environmental pollution and the occupation of cultivated land can be effectively reduced.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a flow chart of the manufacturing process of the cement clinker of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example one
A resource utilization method of tungsten ore waste rocks and tungsten tailings comprises the following steps: (1) pretreatment before screening: roughly crushing underground tungsten ore waste rocks, mixing the crushed underground tungsten ore waste rocks with manually-selected tungsten ore waste rocks of a concentrating mill according to the proportion of 3:5 to obtain a material A, and finely crushing the material A to obtain a material B; (2) screening and mineral separation: performing primary screening on the material B, performing mineral separation on a primary screening upper layer and a primary screening middle layer respectively through an image concentrator to obtain quartz concentrate and aggregate 1, performing image mineral separation on the primary screening upper layer to obtain quartz concentrate, mixing the remaining coarse-grained waste rock into the material A again to perform fine crushing operation, performing secondary screening after reshaping the primary screening lower layer, wherein a vertical impact shaft type crusher is adopted as reshaping equipment, the image concentrator is used for performing mineral separation on a secondary screening upper layer to obtain quartz concentrate and aggregate 2, performing mineral separation on the secondary screening middle layer through the image concentrator to obtain quartz concentrate and aggregate 3, wherein double-layer screens are adopted for the primary screening and the secondary screening, the grading particle size of an upper-layer screen of the primary screening is 30mm, the grading particle size of a lower-layer screen of the primary screening is 19mm, and the grading particle size of an upper-layer screen of the secondary screening is 9mm, the grading particle size of the lower layer sieve of the secondary sieving is 5 mm; (3) pretreatment before dehydration: grading the tungsten tailings, wherein the ratio of the tungsten tailings to the underground tungsten ore waste rocks in the step (1) is 2:3, so as to obtain graded underflow and graded overflow, wherein the graded underflow is subjected to dewatering screen operation to obtain an upper dewatering screen layer and a lower dewatering screen layer, the screen holes of the dewatering screens are 2mm, and the grading equipment adopts a cyclone; (4) screening and reselecting: carrying out third screening on the second screened lower layer of the second screening, and reselecting the obtained third screened lower layer after water is supplemented, wherein the concentration of the ore pulp after water is supplemented is 35%, reselecting equipment selects a shaking table, reselects to obtain tungsten concentrate and reselected tailings, and carries out ore washing on the reselected tailings to obtain ore washing overflow and coarse particles, the ore washing equipment adopts a spiral sand washer, the coarse particles, the upper layer of the third screened upper layer and the upper layer of the dewatering screen in the step (3) are all made sand, and the grading particle size of the third screening is 1 mm; (5) concentration and filter pressing: concentrating the ore washing overflow in the step (4), the grading overflow in the step (3) and the lower layer of the dewatering screen, wherein a high-efficiency thickener is adopted as a concentration device to obtain a concentration overflow and a concentration underflow with the concentration of 35%, the concentration underflow is subjected to filter pressing, a filter press is adopted as the filter pressing device, filter liquid and a filter pressing filter cake are obtained through filter pressing, the filter liquid and the concentration overflow are mixed to form backwater, the filter pressing filter cake is dried to obtain fine tungsten tailings, the drying requirement is that the moisture content of the fine tungsten tailings is less than 2%, the fine tungsten tailings and a mixture are mixed to prepare cement raw materials, the mixture comprises acetylene sludge powder, coal gangue powder, graphite tailings, magnetite tailings and pyrite tailings, and the mixture comprises the following components in percentage by weight: carbide slag powder: coal gangue powder: graphite ore tailings: magnetite tailings: the method comprises the following steps of (1) pressing and molding a cement raw material to obtain a raw material cake, calcining the raw material cake, and rapidly cooling the material at normal temperature of 20 ℃ after the calcination is finished to obtain the cement clinker, wherein the pyrite tailing is 85:6:4:3:2, the weight ratio of fine tungsten tailings to a mixture is 1:9, the-200 mesh content of each component in the mixture is 87-92%, and the water content of each component is less than 2%.
Setting the total dry ore content of underground tungsten ore waste stone, hand-selected tungsten ore waste stone of a concentrating mill and tungsten tailings to be 100%, the yield of quartz concentrate is 4.29%, and the content of silicon dioxide in the quartz concentrate is 95.73%; the yield of tungsten concentrate is 0.02%; the content of WO3 in the tungsten concentrate was 56.25%; the yield of the aggregate 1, the aggregate 2 and the aggregate 3 is 28.07 percent, 14.36 percent and 10.24 percent respectively; the yield of the machine-made sand is 15.15%; the yield of fine tungsten tailings was 27.87%.
The chemical components of the fine tungsten tailings obtained are shown in the following table:
| item | SIO2 | Al2O3 | MgO | CaO | Fe2O3 | WO3 | Loss on ignition | Others |
| Example one | 67.12 | 15.08 | 4.73 | 2.88 | 1.74 | 1.13 | 1.14 | 6.18 |
The chemical components in the components of the mixture are shown in the following table:
| item | SIO2 | Al2O3 | Fe2O3 | CaO | MgO | Ca(OH)2 | SO3 | Loss on ignition | Others |
| Carbide slag powder | 1.87 | 0.12 | 6.77 | 0.16 | 1.25 | 85.16 | 1.12 | 1.32 | 2.23 |
| Coal gangue powder | 40.92 | 23.18 | 3.51 | 4.07 | 1.02 | - | 3.58 | 22.54 | 1.18 |
| Graphite mine tailings | 52.46 | 18.62 | 4.77 | 5.27 | 2.66 | - | 2.97 | 10.51 | 2.74 |
| Magnetite tailings | 60.76 | 5.83 | 20.42 | 5.36 | 1.89 | - | 2.71 | 1.75 | 1.28 |
| Pyrite tailing | 77.34 | 3.58 | 1.51 | 1.89 | 0.93 | - | 10.57 | 2.69 | 1.49 |
Thirdly, the ingredients and physical properties of the cement clinker are as follows:
as can be seen from the above table, the cement clinker prepared by the first embodiment has the free calcium oxide content, the setting time, and the compressive strength of 3 days and 28 days, which all meet the standard requirements.
Example two
A resource utilization method of tungsten ore waste rocks and tungsten tailings comprises the following steps: (1) pretreatment before screening: roughly crushing underground tungsten ore waste rocks, mixing the crushed underground tungsten ore waste rocks with manually-selected tungsten ore waste rocks of a concentrating mill to obtain a material A, and finely crushing the material A to obtain a material B; (2) screening and mineral separation: performing primary screening on the material B, performing ore dressing on a primary screening upper layer and a primary screening middle layer respectively through an image concentrator to obtain quartz concentrate and aggregate 1, performing image ore dressing on the primary screening upper layer to obtain quartz concentrate, mixing the remaining coarse-grained waste rock into the material A again to perform fine crushing operation, performing secondary screening after shaping the primary screening lower layer, performing back-impact crusher on shaping equipment, performing ore dressing on a secondary screening upper layer through the image concentrator to obtain quartz concentrate and aggregate 2, performing ore dressing on the secondary screening middle layer through the image concentrator to obtain quartz concentrate and aggregate 3, performing double-layer screening on the primary screening and the secondary screening, wherein the grading particle size of an upper-layer screen of the primary screening is 31.5mm, the grading particle size of a lower-layer screen of the primary screening is 21mm, and the grading particle size of an upper-layer screen of the secondary screening is 11mm, the grading particle size of the lower layer sieve of the secondary sieving is 5 mm; (3) pretreatment before dehydration: grading the tungsten tailings to obtain a graded underflow and a graded overflow, wherein the graded underflow is subjected to dewatering screen operation to obtain a dewatering screen upper layer and a dewatering screen lower layer, the screen holes of the dewatering screen are 3mm, and the grading equipment adopts a spiral classifier; (4) screening and reselecting: carrying out third screening on the second screened lower layer of the second screening, and reselecting the obtained third screened lower layer after water is supplemented, wherein the concentration of the ore pulp after water is supplemented is 20%, reselecting equipment selects a shaking table, reselects to obtain tungsten concentrate and reselected tailings, and carries out ore washing on the reselected tailings to obtain ore washing overflow and coarse particles, the ore washing equipment adopts a wheel type sand washer, the coarse particles, the upper layer of the third screened upper layer and the upper layer of the dewatering screen in the step (3) are all machine-made sand, and the grading particle size of the third screening is 3 mm; (5) concentration and filter pressing: concentrating the ore washing overflow in the step (4), the grading overflow in the step (3) and the lower layer of the dewatering screen, wherein a deep cone thickener is adopted as a concentration device to obtain a concentration overflow and a concentration underflow with the concentration of 50%, the concentration underflow is subjected to filter pressing, a filter press is adopted as the filter pressing device to obtain a filtrate and a filter pressing filter cake, the filtrate and the concentration overflow are mixed to form a backwater, the filter pressing filter cake is dried to obtain fine tungsten tailings, the drying requirement is that the moisture content of the fine tungsten tailings is less than 2%, the fine tungsten tailings and a mixture are mixed to prepare cement raw materials, the mixture comprises acetylene sludge powder, coal gangue powder, graphite tailings, magnetite tailings and pyrite tailings, and the mixture comprises the following components in parts by weight: carbide slag powder: coal gangue powder: graphite ore tailings: magnetite tailings: the method comprises the following steps of (1) pressing and molding the obtained cement raw material to prepare a raw material cake, then calcining the raw material cake, and rapidly cooling the material at normal temperature of 20 ℃ after the calcination is finished to obtain the cement clinker, wherein the pyrite tailing is 85:6:4:3:2, the weight ratio of the fine tungsten tailings to the mixture is 1:9, the-200 mesh content of each component in the mixture is 87% -92%, and the water content of each component is less than 2%.
Setting the total dry ore content of underground tungsten ore waste stone, hand-selected tungsten ore waste stone of a concentrating mill and tungsten tailings to be 100%, wherein the yield of the quartz concentrate is 4.07%, and the content of silicon dioxide in the quartz concentrate is 94.96%; the yield of tungsten concentrate is 0.03%; WO in tungsten concentrates3The content is 53.17%; the yield of the aggregate 1, the aggregate 2 and the aggregate 3 is 27.92%, 14.47% and 12.83% respectively; the yield of the machine-made sand was 11.04%; the yield of fine tungsten tailings was 29.64%.
The chemical components of the fine tungsten tailings obtained are shown in the following table:
| item | SIO2 | Al2O3 | MgO | CaO | Fe2O3 | WO3 | Loss on ignition | Others |
| Example two | 66.56 | 14.55 | 4.86 | 2.71 | 1.87 | 1.02 | 1.21 | 7.22 |
The chemical components in the mixture are consistent with the embodiment:
thirdly, the ingredients and physical properties of the cement clinker are as follows:
as can be seen from the above table, the cement clinker prepared by the second embodiment has the free calcium oxide content, the setting time, and the compressive strength of 3 days and 28 days, which all satisfy the standard requirements.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A resource utilization method of tungsten ore waste rocks and tungsten tailings is characterized by comprising the following steps: the method comprises the following steps: (1) pretreatment before screening: roughly crushing underground tungsten ore waste rocks, mixing the crushed underground tungsten ore waste rocks with manually-selected tungsten ore waste rocks of a concentrating mill to obtain a material A, and finely crushing the material A to obtain a material B; (2) screening and mineral separation: screening the material B for the first time, performing ore dressing on the upper layer of the first screening and the middle layer of the first screening respectively through an image concentrator to obtain quartz concentrate and aggregate 1, screening the lower layer of the first screening for the second time, performing ore dressing on the upper layer of the second screening through the image concentrator to obtain quartz concentrate and aggregate 2, and performing ore dressing on the middle layer of the second screening through the image concentrator to obtain quartz concentrate and aggregate 3; (3) pretreatment before dehydration: grading the tungsten tailings to obtain a graded underflow and a graded overflow, wherein the graded underflow is subjected to dewatering screen operation to obtain a dewatering screen upper layer and a dewatering screen lower layer; (4) screening and reselecting: carrying out third screening on the second screened lower layer of the second screening, carrying out gravity separation after water is supplemented to the obtained third screened lower layer, carrying out gravity separation to obtain tungsten concentrate and gravity tailings, carrying out ore washing on the gravity tailings to obtain ore washing overflow and coarse particles, wherein the coarse particles, the third screened upper layer and the dewatering screen upper layer in the step (3) are all made sand; (5) concentration and filter pressing: and (3) concentrating the ore washing overflow in the step (4), the grading overflow in the step (3) and the lower layer of the dewatering screen to obtain a concentrated overflow and a concentrated underflow, wherein the concentrated underflow is subjected to filter pressing to obtain a filtrate and a filter pressing filter cake, and the filtrate and the concentrated overflow are mixed to form backwater.
2. The resource utilization method of tungsten ore barren rocks and tungsten tailings according to claim 1, which is characterized in that: and (3) in the step (2), after the image beneficiation is carried out on the upper layer of the first screening in the step (2), quartz concentrate is separated, and the remaining coarse-grain waste rock is mixed into the material A again for fine crushing.
3. The resource utilization method of the tungsten ore waste rocks and the tungsten tailings according to claim 2, which is characterized in that: and (3) in the step (2), shaping the lower layer of the first screening, and then carrying out secondary screening, wherein the shaping equipment adopts a vertical shaft impact crusher or a counterattack crusher.
4. The resource utilization method of tungsten ore barren rocks and tungsten tailings according to claim 1, which is characterized in that: and (5) drying the filter pressing filter cake obtained in the step (5) to obtain fine tungsten tailings, wherein the moisture content of the fine tungsten tailings is less than 2%, and mixing the fine tungsten tailings with a mixture to prepare a cement raw material, wherein the mixture comprises carbide slag powder, coal gangue powder, graphite ore tailings, magnetite tailings and pyrite tailings.
5. The resource utilization method of tungsten ore barren rocks and tungsten tailings according to claim 4, which is characterized in that: and pressing and molding the obtained cement raw material to prepare raw material cakes, calcining the raw material cakes, and quickly cooling the material at normal temperature after the calcination is finished to obtain the cement clinker, wherein the calcination temperature is 1330-1380 ℃ and the calcination time is 20-50 min.
6. The resource utilization method of tungsten ore barren rocks and tungsten tailings according to claim 4, which is characterized in that: the mixture comprises the following components in percentage by weight: carbide slag powder: coal gangue powder: graphite ore tailings: magnetite tailings: the weight ratio of the fine tungsten tailings to the mixed material is 1:9, the-200-mesh content of each component in the mixed material is 87% -92%, and the water content of each component is less than 2%.
7. The resource utilization method of tungsten ore barren rocks and tungsten tailings according to claim 3, which is characterized in that: the first screening and the second screening in the step (2) both adopt double-layer screens, the grading particle size of an upper-layer screen of the first screening is 30-31.5mm, the grading particle size of a lower-layer screen of the first screening is 19-21mm, the grading particle size of an upper-layer screen of the second screening is 9-11mm, the grading particle size of a lower-layer screen of the second screening is 5mm, and the grading particle size of the third screening in the step (4) is 1-3 mm.
8. The resource utilization method of tungsten ore barren rocks and tungsten tailings according to claim 1, which is characterized in that: and (4) in the step (3), the sieve holes of the dewatering sieve are 2-3mm, and the grading equipment adopts a cyclone or a spiral classifier.
9. The resource utilization method of tungsten ore barren rocks and tungsten tailings according to claim 1, which is characterized in that: and (4) the concentration of the ore pulp after water is added in the screening and gravity separation process is 10-35%, the gravity separation equipment adopts a shaking table, and the ore washing equipment adopts a spiral sand washer or a wheel type sand washer.
10. The resource utilization method of tungsten ore barren rocks and tungsten tailings according to claim 1, which is characterized in that: and (5) adopting a high-efficiency thickener or a deep cone thickener as concentration equipment, and adopting a filter press as filter pressing equipment.
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