CN114570516B - Sorting method of copper-containing tungsten ore - Google Patents
Sorting method of copper-containing tungsten ore Download PDFInfo
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- CN114570516B CN114570516B CN202210126150.1A CN202210126150A CN114570516B CN 114570516 B CN114570516 B CN 114570516B CN 202210126150 A CN202210126150 A CN 202210126150A CN 114570516 B CN114570516 B CN 114570516B
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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
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
Abstract
The invention provides a method for separating copper-containing tungsten ore, which comprises the steps of crushing and grading copper-containing tungsten raw ore, and sending the crushed and graded copper-containing tungsten raw ore into X-ray radiation for preselecting tungsten and copper to obtain preselecting tungsten concentrate, preselecting copper concentrate and waste rock; the pre-selected tungsten concentrate is subjected to crushing and grading, jigging roughing, floating copper roughing and spiral chute roughing to obtain jigging rough concentrate and chute rough concentrate; the jigged rough concentrate and the chute rough concentrate are crushed and classified, d 4-d 5 grades enter a jigger for concentration, d 5-d 6 and < d6 grades float copper and enter a shaking table for concentration, and tungsten concentrate and tailings are obtained; the method comprises the steps of crushing, grinding and floatation of the pre-selected copper concentrate to obtain a floating copper rough concentrate and roughing tailings, concentrating all the floating copper rough concentrate to obtain copper concentrate and concentrating tailings, and recycling tungsten from the roughing tailings and the concentrating tailings by adopting a spiral chute roughing-shaking table concentrating process to obtain tungsten concentrate and tailings. Under the condition of ensuring the tungsten recovery index, the invention greatly improves the grade and recovery rate of copper.
Description
Technical Field
The invention relates to the technical field of tungsten ore dressing, in particular to a method for separating copper-containing tungsten ore.
Background
Tungsten ore is an important rare mineral product and strategic mineral product, occupies a very important position in national economy development, and has important significance for guaranteeing national defense safety, resource safety and strategic emerging industry development. The tungsten resources in China are rich, and the ascertained reserves account for about 58% of the total reserves in the world; wherein, the minerals of the scheelite group and the scheelite group are mainly used for mining and utilizing values. However, tungsten ores in China are mostly multi-metal ore deposits, often are associated with various sulfide ores such as copper, molybdenum, lead, zinc and the like, and along with continuous development and consumption of easy-to-select and high-quality tungsten ore resources, the ores are gradually depleted, the mineral composition is increasingly complex, the separation difficulty is increased, and how to realize efficient separation and comprehensive recycling of tungsten and other co-associated metal elements is an important subject of research in the field of tungsten ore dressing.
In research and production practice, a process of firstly floating sulfide ore and then floating tungsten is generally adopted for copper-tungsten multi-metal ore, and mainly comprises technological processes of copper preferential flotation, copper rapid flotation, copper-sulfur mixed flotation, sulfide ore tailing tungsten flotation and the like, wherein the processes of copper-sulfur mixed flotation and re-separation and tailing tungsten flotation are most widely applied. The main metal minerals of copper-tungsten-iron polymetallic ore in Yunnan certain place are chalcopyrite, pyrrhotite, pyrite, scheelite, magnetite, etc., and the crude ore contains TFe 30.70%, WO 3 0.30 percent and 0.14 percent of Cu, adopting a beneficiation process of 'copper-sulfur mixed flotation, coarse concentrate regrinding copper-sulfur separation, white tungsten flotation and iron weak magnetic separation', and obtaining the technical indexes of 13.9 percent of copper concentrate grade, 45.04 percent of recovery rate, 45.64 percent of tungsten concentrate grade, 75.13 percent of recovery rate, 69.90 percent of iron concentrate grade and 62.43 percent of recovery rate through a closed circuit test. Complex polymetallic ore of copper and tungsten in Jiangxi, metal mineral mainly chalcopyrite, scheelite, pyrite, pyrrhotite, and WO containing 3 0.22 percent, 0.11 percent of Cu and 1.16 percent of S, adopting the technological process of copper-sulfur mixed flotation, copper-sulfur separation and tailing flotation to obtain copper concentrate with 24.13 percent of copper content, 68.90 percent of recovery rate, 36.15 percent of sulfur concentrate with 60.77 percent of recovery rate and tungsten concentrate with WO 3 62.24% and 73.68% recovery rate. Some complex multi-metal sulfide ore of tungsten, copper, molybdenum and bismuth in Guangxi, wherein the main metal ore is chalcopyrite, molybdenite, gabbro, pyrite and the like, and the raw ore contains WO 3 0.35 percent, 0.41 percent of Cu, 0.041 percent of Mo and 0.049 percent of Bi, adopting the copper-bismuth mixed flotation, copper-bismuth separation with copper floating and bismuth inhibition, and tailing gravity separation and tungsten recovery ore dressing process flow, finally obtaining molybdenum concentrate containing 38.41 percent of molybdenum, 88.55 percent of recovery rate, copper concentrate containing 15.00 percent of copper, copper concentrate with the recovery rate of 90.51 percent, bismuth concentrate containing 11.78 percent of bismuth, recovery rate of 90.00 percent and WO 3 Grade 56.01%, recovery 99.57% of tungsten concentrate. The copper-tungsten polymetallic ore generally has lower content of valuable metal elements, adopts a full-size-fraction crushing-ore grinding-floatation process, has large grinding input and high energy consumption, synchronously increases the cost of subsequent ore dressing medicament consumption, wastewater treatment, discharge and the like, and obviously reduces the comprehensive economic benefit of enterprises.
Certain copper-containing tungsten ore, mainly chalcopyrite, scheelite and scheelite, contains WO 3 0.36 percent and 0.12 percent of Cu, adopting the process flow of gravity concentration and gravity floating magnetoelectric combination of manual concentration, three-stage jigging, five-stage shaking table and fine mud centralized treatment to obtain tungsten concentrate containing WO 3 65 percent, 83 percent of recovery rate, 11 to 12 percent of copper concentrate containing copper, 63 percent of recovery rate, complex and lengthy process flow, relatively low grade and recovery rate of copper concentrate, more labor force consumed by hand separation, high labor intensity and lower production efficiency.
Disclosure of Invention
The invention provides a method for separating copper-containing tungsten ore, which realizes the efficient separation and comprehensive recycling of tungsten and co-associated copper elements in the copper-containing tungsten ore, and greatly improves the grade and recovery rate of copper under the condition of ensuring the recovery index of tungsten.
The technical scheme of the invention is realized as follows: a method for sorting copper-containing tungsten ore, comprising the steps of:
(1) Crushing and grading raw ore with the diameter of-200 mm to obtain d 1-d 2 grade products and < d2 grade products;
(2) Carrying out X-ray radiation on the d 1-d 2 grade products in the step (1) to obtain a tungsten concentrate and a material 1, and carrying out X-ray radiation on the material 1 to obtain copper concentrate and waste rock;
(3) Crushing the pre-selected tungsten concentrate in the step (2) until the particle size is smaller than d2, and then merging with the product with the < d2 particle size in the step (1) for classification to obtain a product with the d 2-d 3 particle size and a product with the < d3 particle size;
(4) Jigging and roughing the d 2-d 3 grade products in the step (3) to obtain jigged rough concentrate and jigged middling 1, and returning the jigged middling 1 to the step (3) for classification after rod milling;
(5) Carrying out copper flotation roughing on the product with the grade < d3 > in the step (3) to obtain copper rough concentrate and copper flotation tailings, and carrying out spiral chute roughing on the copper flotation tailings to obtain chute rough concentrate and final tailings;
(6) Combining the jigged rough concentrate in the step (4) and the chute rough concentrate in the step (5) for crushing and grading to obtain d 4-d 5 grade products, d 5-d 6 grade products and < d6 grade products;
(7) Jigging and concentrating the d 4-d 5 grade products in the step (6) to obtain tungsten concentrate and jigged middlings 2, and returning the jigged middlings 2 to the step (6) for crushing and grading;
(8) Carrying out floating copper roughing on the d 5-d 6 grade product in the step (6) to obtain copper rough concentrate and floating copper tailings, carrying out concentration on the floating copper tailings by a shaking table twice to obtain tungsten concentrate, shaking table middling 1 and final tailings, and returning the shaking table middling 1 to the floating copper roughing in the step (8) after rod grinding;
(9) Carrying out copper flotation roughing on the < d6 grade product in the step (6) to obtain copper rough concentrate and copper flotation tailings, and carrying out concentration 1 and concentration 2 on the copper flotation tailings by a shaking table to obtain tungsten concentrate, shaking table middlings 2 and final tailings, wherein the shaking table middlings 2 return to the shaking table concentration 1 for separation;
(10) Crushing and grinding the pre-selected copper concentrate in the step (2), and then carrying out floating copper roughing to obtain copper rough concentrate and roughing tailings;
(11) Carrying out floating copper concentration operation on the copper rough concentrate in the steps (5), (8), (9) and (10) to obtain copper concentrate and concentration tailings;
(12) And (3) carrying out spiral chute roughing and shaking table concentration operation on the roughing tailings in the step (10) and the concentrating tailings in the step (11) to recover tungsten, thereby obtaining tungsten concentrate and final tailings.
Further, in the step (1), the crushed raw ore has a particle size d1 of 40 to 60mm and a classified particle size d2 of 5 to 10mm.
Further, in the step (2), tungsten is preselected by X-ray radiation, and the threshold H1 is 0.15-0.30; the X-ray radiation preselects copper, and the threshold H2 is 0.02-0.15.
Further, in the step (3), the classification particle size d3 is 1.5 to 3mm.
Further, in the step (4), the 1-rod grinding fineness of the jigged middling is-0.5 mm and accounts for 20-70%.
Further, in the step (6), the classification particle size d4 is 2 to 4mm, d5 is 1.5 to 2.5mm, d6 is 0.15 to 0.5mm.
Further, in the steps (5), (8), (9) and (10), the agent for roughing the floating copper and the dosage thereof are as follows: 40-120g/t of collecting agent xanthate, 10-40g/t of foaming agent pinitol oil, and Y89, ethyl xanthate or butyl xanthate.
Further, in the step (10), the pre-selected copper concentrate has a crushing granularity of less than 2mm, and the grinding fineness is-0.074 mm accounting for 30-60%.
Further, in the step (11), in the copper flotation and concentration operation, the dosage of the collecting agent xanthate is 0-30g/t, the dosage of the foaming agent pinitol oil is 0-20g/t, and the collecting agent xanthate is Y89, ethyl xanthate or butyl xanthate.
Further, in the step (4), jigging and roughing are carried out, the mesh size is 2-10 mm, and the granularity of the artificial bed layer is 5-30 mm.
Further, in the steps (5) and (12), the spiral chute is roughed, the mineral mass concentration is 25-40%, the pitch of the spiral chute is 390mm, and the diameter is 680mm.
Further, in the step (7), jigging and selecting, wherein the mesh size is 2-6 mm, and the granularity of the artificial bed layer is 5-25 mm.
Further, in the steps (8), (9) and (12), the concentration of mineral substances is selected from the concentration of 10-30% by weight by the shaking table.
The invention has the beneficial effects that:
1. according to the method for separating copper-containing tungsten ore, disclosed by the invention, under the condition of ensuring the tungsten recovery index, the grade and recovery rate of copper are greatly improved, the grade of copper concentrate reaches more than 16%, the recovery rate reaches more than 85%, and the high-efficiency separation and comprehensive recovery utilization of tungsten and co-associated copper elements in the copper-containing tungsten ore are realized;
2. according to the invention, X-ray radiation is adopted for preselecting, tungsten tailing discarding and copper tailing discarding are carried out in advance, a large amount of qualified waste rock is discarded, the grade of useful minerals of the selected ore is improved, the treatment cost of the processes such as crushing, grinding and floatation in the downstream process of the mining process is greatly reduced, the energy is saved, the consumption is reduced, the cost is greatly reduced, and the mine efficiency and economic benefit are improved;
3. the spiral chute replaces a shaking table, so that the processing capacity of the spiral chute is larger and the occupied area is small compared with the shaking table; the combined use of the jigs and the novel spiral chute omits a large number of shaking tables, has small occupied area, high separation efficiency and high concentrate recovery rate, and greatly reduces investment cost;
4. the waste stone can be used as the aggregate of the sand stone, the final tailings can produce machine-made sand, almost waste-free production is realized, and the actual efficient green mine is practiced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of sorting copper-containing tungsten ore according to the present invention.
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 any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, a method for sorting copper-containing tungsten ore comprises the following steps:
(1) Crushing and grading: crushing raw ore with the grain size of 0-200mm by adopting a jaw crusher, wherein the crushing granularity is smaller than 40mm; delivering the crushed ore into a vibrating screen for classification to obtain two particle sizes of 40-5 mm and < 5mm;
(2) Pre-selecting tungsten by X-ray radiation: sending the graded 40-5 mm size fraction product in the step (1) into an X-ray radiation separator 1 for preselection, wherein the value of a separation threshold is 0.15, and obtaining preselect tungsten concentrate and a material 1;
pre-selecting copper by X-ray radiation: the material 1 is sent into an X-ray radiation separator 2 for preselection, the separation threshold value is 0.02, and the preselect copper concentrate and the waste rock are obtained;
(3) Secondary crushing of the pre-selected tungsten concentrate: crushing the pre-selected tungsten concentrate in the step (2), wherein the crushing granularity is less than 5mm; then combining the product with the grain size of <5mm in the step (1) and then carrying out secondary classification to obtain two grain size products of 5-1.5 mm and <1.5 mm;
(4) Jigging and roughing: feeding the graded 5-1.5 mm grade product in the step (3) into a jigger for roughing to obtain jigged rough concentrate and jigged middling 1, wherein the jigged middling 1 enters a rod mill for regrinding and then returns to the step (3) for grading; the sieve pore size of the jigger is 8mm, the granularity of the artificial bed layer is 25mm, and the regrinding fineness of the rod mill is-0.5 mm accounting for 20%;
(5) Roughing the floating copper-spiral chute: carrying out first copper flotation roughing on the graded <1.5mm grade product in the step (4) to obtain copper rough concentrate and copper flotation tailings, and feeding the copper flotation tailings into a spiral chute for roughing to obtain spiral chute rough concentrate and tailings; the mineral mass concentration of the feed ore of the spiral chute is 25%, the pitch of the spiral chute is 390mm, the diameter is 680mm, the dosage of the collector ethyl yellow oil in the copper flotation step is 40g/t, and the foaming agent pinitol oil is 10g/t;
(6) Three-stage crushing-classification: combining the jigged rough concentrate in the step (4) and the spiral chute rough concentrate in the step (5) for crushing and grading to obtain three grain products of 2.5-1.5 mm, 1.5-0.5 mm and <0.5 mm;
(7) Jigging and selecting: feeding the 2.5-1.5 mm size fraction product in the step (6) into a jigger for concentration to obtain tungsten concentrate and jigged middling 2, wherein the jigged middling 2 is returned to the step (6) for crushing and grading; the sieve pore size of the jigger is 4mm, and the granularity of the artificial bed layer is 15mm;
(8) Medium-size fraction copper flotation tungsten separation: firstly carrying out copper flotation roughing on the 1.5-0.5 mm-sized product in the step (6) to obtain copper rough concentrate and copper flotation tailings, and carrying out concentration on the copper flotation tailings for 2 times by adopting a shaking table to obtain tungsten concentrate, shaking table middling 1 and final tailings, wherein the shaking table middling 1 enters a rod mill and is ground again, and then returns to the step (8) to carry out copper flotation roughing; the amount of the collector ethyl yellow agent in the copper floating step is 40g/t, the amount of the foaming agent pine pollen oil is 10g/t, and the concentration of mineral substances is 10% through concentrating in a shaking table;
(9) Fine fraction copper flotation tungsten separation: carrying out first copper flotation roughing on the product with the size of less than 0.5mm in the step (6) to obtain copper rough concentrate and copper flotation tailings, and carrying out shaking table concentration 1 and shaking table concentration 2 on the copper flotation tailings to obtain tungsten concentrate, shaking table middling 2 and final tailings, wherein the shaking table middling 2 returns to the shaking table concentration 1 for separation; the amount of the collector ethyl yellow agent in the copper floating step is 40g/t, the amount of the foaming agent pine pollen oil is 10g/t, and the concentration of mineral substances is 10% through concentrating in a shaking table;
(10) Flotation and roughing of the pre-selected copper concentrate: crushing and grinding the pre-selected copper concentrate in the step (2), and then sending the crushed and ground copper concentrate into flotation to obtain copper rough concentrate and rough tailings; the crushing granularity is less than 2mm, the grinding fineness is-0.074 mm accounting for 30%, the ethyl xanthate dosage of the collector is 40g/t, and the foaming agent pinitol oil is 10g/t;
(11) Copper rough concentrate selection: feeding the copper rough concentrate in the steps (5), (8), (9) and (10) into a floating copper concentration operation to obtain copper concentrate and concentration tailings; the dosage of the collector ethyl yellow agent in the copper concentration step is 0g/t, and the dosage of the foaming agent pinitol oil is 0g/t;
(12) And (3) recleaning and recycling tungsten from copper tailings: feeding the roughing tailings in the step (10) and the concentrating tailings in the step (11) into a spiral chute roughing-shaking table concentrating and gravity concentrating operation to recover tungsten, so as to obtain tungsten concentrate and tailings; the mineral mass concentration of the spiral chute is 25%, the pitch of the spiral chute is 390mm, the diameter of the spiral chute is 680mm, and the mineral mass concentration of the shaking table is selected to be 10%;
finally, the product containing WO 3 A tungsten concentrate with a recovery rate of 84.79% and a copper concentrate with a Cu content of 16.66% and a recovery rate of 85.34%.
Example 2:
as shown in fig. 1, a method for sorting copper-containing tungsten ore comprises the following steps:
(1) Crushing: crushing raw ore with the grain size of 0-200mm by adopting a jaw crusher, wherein the crushing granularity is smaller than 60mm;
grading: delivering crushed ore into a vibrating screen for classification to obtain two particle fractions of 60-10 mm and <10 mm;
(2) Pre-selecting tungsten by X-ray radiation: sending the graded 60-10 mm size fraction product in the step (1) into an X-ray radiation separator 1 for preselection, wherein the value of a separation threshold is 0.30, and obtaining preselect tungsten concentrate and a material 1;
pre-selecting copper by X-ray radiation: the material 1 is sent into an X-ray radiation separator 2 for preselection, the separation threshold value is 0.15, and the preselect copper concentrate and the waste rock are obtained;
(3) Secondary crushing of the pre-selected tungsten concentrate: crushing the pre-selected tungsten concentrate in the step (2), wherein the crushing granularity is smaller than 10mm; then, the mixture is combined with the product with the particle size of <10mm in the step (1) and then classified, so that two particle products with the particle size of 10-3 mm and <3mm are obtained;
(4) Jigging and roughing: feeding the graded 10-3 mm grade product in the step (3) into a jigger for roughing to obtain jigged rough concentrate and jigged middling 1, wherein the jigged middling 1 enters a rod mill for regrinding and then returns to the step (3) for grading; the sieve pore size of the jigger is 10mm, the granularity of the artificial bed layer is 30mm, and the regrinding fineness of the rod mill is-0.5 mm accounting for 70%;
(5) Roughing the floating copper-spiral chute: carrying out first copper flotation roughing on the graded <3mm grade product in the step (3) to obtain copper rough concentrate and copper flotation tailings, and feeding the copper flotation tailings into a spiral chute for roughing to obtain spiral chute rough concentrate and final tailings; the mineral mass concentration of the feed ore of the spiral chute is 40%, the pitch of the spiral chute is 390mm, the diameter of the spiral chute is 680mm, the dosage of the collector Y89 in the copper flotation step is 120g/t, and the foaming agent, namely, the pine alcohol oil is 40g/t;
(6) Three-stage crushing-classification: combining the jigged rough concentrate in the step (4) and the chute rough concentrate in the step (5) for crushing and grading to obtain three grain products of 4-2.5 mm, 2.5-0.5 mm and <0.5 mm;
(7) Jigging and selecting: feeding the 4-2.5 mm grade product in the step (6) into a jigger for concentration to obtain tungsten concentrate and jigged middling 2, wherein the jigged middling 2 is returned to the step (6) for crushing and grading; the sieve pore size of the jigger is 6mm, and the granularity of the artificial bed layer is 25mm;
(8) Medium-size fraction copper flotation tungsten separation: firstly carrying out copper flotation roughing on the 2.5-0.5 mm-sized product in the step (6) to obtain copper rough concentrate and copper flotation tailings, and carrying out concentration on the copper flotation tailings for 2 times by adopting a shaking table to obtain tungsten concentrate, shaking table middling 1 and final tailings, wherein the shaking table middling 1 enters a rod mill and is ground again, and then the copper flotation roughing in the step (8) is carried out; the amount of the collector Y89 in the copper floating step is 120g/t, the amount of the foaming agent pine alcohol oil is 40g/t, and the concentration of mineral substances is 30% through concentrating in a shaking table;
(9) Fine fraction copper flotation tungsten separation: carrying out first copper flotation rough concentration on the product with the grain size of less than 0.5mm in the step (6) to obtain copper rough concentrate and copper flotation tailings, carrying out 2 times of concentration on the copper flotation tailings by adopting a shaking table, wherein the 2 times of concentration are respectively shaking table concentration 1 and shaking table concentration 2 to obtain tungsten concentrate, shaking table middling 2 and final tailings, and returning the shaking table middling 2 to the shaking table concentration 1 for separation; the amount of the collector Y89 in the copper floating step is 120g/t, the amount of the foaming agent pine alcohol oil is 40g/t, and the concentration of mineral substances is 30% through concentrating in a shaking table;
(10) Flotation and roughing of the pre-selected copper concentrate: crushing and grinding the pre-selected copper concentrate in the step (2), and then feeding the crushed and ground copper concentrate into a floating copper rougher to obtain copper rough concentrate and rougher tailings; the crushing granularity is less than 2mm, the grinding fineness is-0.074 mm accounting for 60 percent, the consumption of the collector Y89 is 120g/t, and the foaming agent, namely, the pine alcohol oil is 40g/t;
(11) Copper rough concentrate selection: feeding the copper rough concentrate in the steps (5), (8), (9) and (10) into a floating copper concentration operation to obtain copper concentrate and concentration tailings; the dosage of the collector Y89 in the copper concentration step is 30g/t, and the dosage of the foaming agent pinitol oil is 20g/t;
(12) And (3) recleaning and recycling tungsten from copper tailings: feeding the roughing tailings in the step (10) and the concentrating tailings in the step (11) into a spiral chute roughing-shaking table concentrating and gravity concentrating operation to recover tungsten, so as to obtain tungsten concentrate and tailings; the mineral mass concentration of the spiral chute is 40%, the pitch of the spiral chute is 390mm, the diameter of the spiral chute is 680mm, and the mineral mass concentration of the shaking table is selected to be 30%;
finally, the product containing WO 3 65.29%, tungsten concentrate with a recovery rate of 85.21% and copper concentrate with a Cu content of 16.97% and a recovery rate of 85.59%.
Example 3:
as shown in fig. 1, a method for separating copper-containing tungsten ore specifically comprises the following steps:
certain copper-containing tungsten ore, mainly chalcopyrite, scheelite and scheelite, contains WO 3 0.36％、Cu 0.12％。
(1) Crushing: crushing raw ore with the grain size of 0-200mm by adopting a jaw crusher, wherein the crushing granularity is less than 50mm;
grading: delivering crushed ore into a vibrating screen for classification to obtain two particle fractions of 50-6 mm and < 6mm;
(2) Pre-selecting tungsten by X-ray radiation: sending the classified 50-10 mm size fraction product in the step (1) into an X-ray radiation separator 1 for preselection, wherein the value of a separation threshold is 0.20, and obtaining preselect tungsten concentrate and a material 1;
pre-selecting copper by X-ray radiation: the material 1 is sent into an X-ray radiation separator 2 for preselection, and the separation threshold value is 0.05, so that preselect copper concentrate and waste rock are obtained;
(3) Secondary crushing of the pre-selected tungsten concentrate: crushing the pre-selected tungsten concentrate in the step (2), wherein the crushing granularity is less than 6mm; then, the mixture is combined with the product with the particle size of <6mm in the step (2) and then classified, so that two particle products with the particle size of 6-2 mm and <2mm are obtained;
(4) Jigging and roughing: feeding the graded 6-2 mm grade product in the step (3) into a jigger for roughing to obtain jigged rough concentrate and jigged middling 1, wherein the jigged middling 1 enters a rod mill for regrinding and then returns to the step (3) for grading; the sieve pore size of the jigger is 8mm, the granularity of the artificial bed layer is 25mm, and the regrinding fineness of the rod mill is-0.5 mm accounting for 40%;
(5) Roughing the floating copper-spiral chute: carrying out first copper flotation roughing on the graded <2mm grade product in the step (3) to obtain copper rough concentrate and copper flotation tailings, and feeding the copper flotation tailings into a spiral chute for roughing to obtain chute rough concentrate and final tailings; the mineral mass concentration of the feed ore of the spiral chute is 35%, the pitch of the spiral chute is 390mm, the diameter is 680mm, the dosage of the collector butyl yellow oil in the copper flotation step is 60g/t, and the foaming agent pinitol oil is 20g/t;
(6) Three-stage crushing-classification: combining the jigged rough concentrate in the step (4) and the chute rough concentrate in the step (5) for crushing and grading to obtain three grain products of 3.5-2 mm, 2-0.3 mm and <0.3 mm;
(7) Jigging and selecting: feeding the 3.5-2 mm grade product in the step (6) into a jigger for concentration to obtain tungsten concentrate and jigged middling 2, wherein the jigged middling 2 is returned to the step (6) for crushing and grading; the sieve pore size of the jigger is 5mm, and the granularity of the artificial bed layer is 25mm;
(8) Medium-size fraction copper flotation tungsten separation: firstly floating copper from the 2-0.3 mm grain product in the step (6) to obtain copper rough concentrate and floating copper tailings, and concentrating the floating copper tailings for 2 times by adopting a shaking table to obtain tungsten concentrate, shaking table middling 1 and final tailings, wherein the shaking table middling 1 enters a rod mill and is ground again, and then the floating copper rough concentration in the step (8) is returned; in the copper floating step, the dosage of the collector butyl yellow is 60g/t, the dosage of the foaming agent pinitol oil is 20g/t, and the concentration of mineral substances is 20% through concentrating in a shaking table;
(9) Fine fraction copper flotation tungsten separation: firstly floating copper from the product with the grain size of less than 0.3mm in the step (6) to obtain copper rough concentrate and floating copper tailings, and concentrating the floating copper tailings by adopting a shaking table for 2 times, wherein the 2 times of concentration are respectively shaking table concentration 1 and shaking table concentration 2 to obtain tungsten concentrate, shaking table middling 2 and final tailings, and the shaking table middling 2 returns to the shaking table concentration 1 for separation; in the copper floating step, the dosage of the collector butyl yellow is 60g/t, the dosage of the foaming agent pinitol oil is 20g/t, and the concentration of mineral substances is 20% through concentrating in a shaking table;
(10) Flotation and roughing of the pre-selected copper concentrate: crushing and grinding the pre-selected copper concentrate in the step (2), and then feeding the crushed and ground copper concentrate into a floating copper rougher to obtain copper rough concentrate and rougher tailings; the crushing granularity is less than 2mm, the grinding fineness is-0.074 mm accounting for 45%, the dosage of the collecting agent butyl xanthate is 60g/t, and the foaming agent pinitol oil is 20g/t;
(11) Copper rough concentrate selection: feeding the copper rough concentrate in the steps (5), (8), (9) and (10) into a floating copper concentration operation to obtain copper concentrate and concentration tailings; the dosage of the collector butyl yellow agent in the copper concentration step is 10g/t, and the dosage of the foaming agent pinitol oil is 10g/t;
(12) And (3) recleaning and recycling tungsten from copper tailings: feeding the roughing tailings in the step (10) and the concentrating tailings in the step (11) into a spiral chute roughing-shaking table concentrating and gravity concentrating operation to recover tungsten, so as to obtain tungsten concentrate and tailings; the mineral mass concentration of the spiral chute is 30%, the pitch of the spiral chute is 390mm, the diameter of the spiral chute is 680mm, and the mineral mass concentration of the shaking table is carefully selected to be 20%; finally, tungsten concentrate, copper concentrate, waste stone and final tailings are obtained, the test flow chart is shown in figure 1, and the test results are shown in table 1.
TABLE 1 sorting test results of copper-tungsten-containing ores
In the above table, the tungsten concentrate is the sum of the tungsten concentrates in steps (7), (8), (9) and (12); the final tailings are the sum of the final tailings in steps (5), (8), (9) and (12).
The test results show that: the copper-containing tungsten ore adopts X-ray radiation to preselect and throw waste, the preselect tungsten concentrate adopts jigging, spiral chute, shaking table and other gravity separation processes to recover tungsten, the preselect copper concentrate adopts floatation process to recover copper, and finally the yield is 0.46%, and the product contains WO 3 65.92%, the recovery rate of the tungsten concentrate is 84.96%, the yield of the tungsten concentrate is 0.60%, the copper concentrate contains 16.91% of Cu, the recovery rate of the copper concentrate is 85.12%, the waste rock rejection rate is 71.33%, and the waste disposal effect is good. Tungsten and copper are well separated and comprehensively recovered, waste stone can be used as sand aggregate, tailings can be used for producing machine-made sand, almost no waste production is caused, and green production is truly realized.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. A method for sorting copper-containing tungsten ore, comprising the steps of:
(1) Crushing and grading raw ore with the diameter of-200 mm to obtain d 1-d 2 grade products and < d2 grade products;
(2) Carrying out X-ray radiation on the d 1-d 2 grade products in the step (1) to obtain a tungsten concentrate and a material 1, and carrying out X-ray radiation on the material 1 to obtain copper concentrate and waste rock;
(3) Crushing the pre-selected tungsten concentrate in the step (2) until the particle size is smaller than d2, and then merging with the product with the < d2 particle size in the step (1) for classification to obtain a product with the d 2-d 3 particle size and a product with the < d3 particle size;
(4) Jigging and roughing the d 2-d 3 grade products in the step (3) to obtain jigged rough concentrate and jigged middling 1, and returning the jigged middling 1 to the step (3) for classification after rod milling;
(5) Carrying out copper flotation roughing on the product with the grade < d3 > in the step (3) to obtain copper rough concentrate and copper flotation tailings, and carrying out spiral chute roughing on the copper flotation tailings to obtain chute rough concentrate and final tailings;
(6) Combining the jigged rough concentrate in the step (4) and the chute rough concentrate in the step (5) for crushing and grading to obtain d 4-d 5 grade products, d 5-d 6 grade products and < d6 grade products;
(7) Jigging and concentrating the d 4-d 5 grade products in the step (6) to obtain tungsten concentrate and jigged middlings 2, and returning the jigged middlings 2 to the step (6) for crushing and grading;
(8) Carrying out floating copper roughing on the d 5-d 6 grade product in the step (6) to obtain copper rough concentrate and floating copper tailings, carrying out concentration on the floating copper tailings by a shaking table twice to obtain tungsten concentrate, shaking table middling 1 and final tailings, and returning the shaking table middling 1 to the floating copper roughing in the step (8) after rod grinding;
(9) Carrying out copper flotation roughing on the < d6 grade product in the step (6) to obtain copper rough concentrate and copper flotation tailings, and carrying out concentration 1 and concentration 2 on the copper flotation tailings by a shaking table to obtain tungsten concentrate, shaking table middlings 2 and final tailings, wherein the shaking table middlings 2 return to the shaking table concentration 1 for separation;
(10) Crushing and grinding the pre-selected copper concentrate in the step (2), and then carrying out floating copper roughing to obtain copper rough concentrate and roughing tailings;
(11) Carrying out floating copper concentration operation on the copper rough concentrate in the steps (5), (8), (9) and (10) to obtain copper concentrate and concentration tailings;
(12) And (3) carrying out spiral chute roughing and shaking table concentration operation on the roughing tailings in the step (10) and the concentrating tailings in the step (11) to recover tungsten, thereby obtaining tungsten concentrate and final tailings.
2. The method according to claim 1, wherein in the step (1), the crushed raw ore has a particle size d1 of 40 to 60mm and a classified particle size d2 of 5 to 10mm.
3. The method of claim 1, wherein in step (2), the pre-selection of tungsten by X-ray radiation is performed, and the threshold H1 is 0.15 to 0.30; the X-ray radiation preselects copper, and the threshold H2 is 0.02-0.15.
4. The method of claim 1, wherein in the step (3), the classification size d3 is 1.5 to 3mm.
5. The method for sorting copper-containing tungsten ores according to claim 1, wherein in the step (4), the 1-bar grinding fineness of the jigged middlings is-0.5 mm and accounts for 20-70%.
6. The method according to claim 1, wherein in the step (6), the classification grain size d4 is 2 to 4mm, d5 is 1.5 to 2.5mm, and d6 is 0.15 to 0.5mm.
7. The method for sorting copper-containing tungsten ore according to claim 1, wherein in the steps (5), (8), (9) and (10), the agents for the roughing of copper and the amounts thereof are: 40-120g/t of collecting agent xanthate and 10-40g/t of foaming agent pinitol oil.
8. The method according to claim 1, wherein in the step (10), the pre-selected copper concentrate has a crushing grain size of less than 2mm and a grinding fineness of-0.074 mm accounting for 30-60%.
9. The method according to claim 1, wherein in the step (11), the amount of yellow drug of the collector is 0-30g/t and the amount of the foaming agent pinitol oil is 0-20g/t in the copper flotation and concentration operation.
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