CN112892853A - Comprehensive recovery and mineral separation process for wolframite and associated valuable metals of wolframite - Google Patents
Comprehensive recovery and mineral separation process for wolframite and associated valuable metals of wolframite Download PDFInfo
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Abstract
The invention discloses a comprehensive recovery beneficiation process for wolframite and associated valuable metals thereof, which comprises the following steps: crushing, grinding and floating tungsten-molybdenum-copper polymetallic ore to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum floating tailings; grinding the copper-molybdenum mixed rough concentrate, and carrying out molybdenum floating and copper suppression separation to obtain molybdenum concentrate and copper concentrate; grading the copper-molybdenum flotation tailings to obtain oversize products and undersize products; reselecting the oversize products to obtain reselected rough concentrate and reselected tailings; grinding and floating the gravity concentration rough concentrate to obtain tungsten concentrate 1; and grinding and floating the undersize product and the gravity tailings to obtain tungsten concentrate 2. The beneficiation process can effectively avoid over-crushing of the ore, gradually realize monomer dissociation, and obtain qualified tungsten concentrate, molybdenum concentrate and copper concentrate on the premise of ensuring the recovery rate, so that valuable elements in the ore are fully recovered, and the comprehensive utilization rate of resources is improved.
Description
Technical Field
The invention relates to the technical field of beneficiation processes, in particular to a comprehensive recovery beneficiation process for wolframite and associated valuable metals of the wolframite.
Background
High melting point, high specific gravity, high hardness are important characteristics of tungsten. Tungsten is one of the irreplaceable basic materials of national economy and modern national defense, is an important strategic material, and is widely applied to important fields of aerospace, mechanical manufacturing, petroleum, new materials, national defense industry and the like. Therefore, great attention is paid to the development and utilization of tungsten resources in various countries. The tungsten resource reserves in China account for about 60 percent of the world, but tungsten ore deposits are complex and diverse in types, mainly paragenetic ores of scheelite and wolframite, mostly embedded in fine grains, little rich ores, low grade, close mineral symbiosis, complex composition and high mineral separation difficulty.
The polymetallic sulphide ore containing tungsten, molybdenum and copper has the advantages of various ore species, complex composition and low grade. Molybdenite and tungsten ore are brittle and easy to crush, and a process of stage grinding and multi-stage sorting is adopted. The method for separating the black and white tungsten ores and the associated polymetallic sulphide ores at home and abroad currently adopts 'tungsten ore gravity separation and enrichment' -multi-metal sulphide concentrate step-by-step flotation of tailings or 'tungsten ore gravity separation and enrichment' -graded gravity separation of tailings and flotation of the polymetallic sulphide concentrate. The main disadvantages of the above process are as follows: firstly, fully grinding ore to dissociate mineral monomers, but if the ore is excessively ground, a large amount of fine mud is generated to influence the subsequent sorting process; secondly, the tungsten ore gravity concentration method is single, and the recovery rate of the fine-grained embankment-grade tungsten ore is not high, so that the overall recovery rate of the tungsten ore is not high; thirdly, the multi-metal sulfide mineral chemical is floated step by step with large dosage. Therefore, it is necessary to search for effective beneficiation processes to achieve the purpose of comprehensively recovering tungsten, molybdenum and copper.
Disclosure of Invention
In view of the above, there is a need to provide a comprehensive recovery beneficiation process for wolframite and associated valuable metals thereof, so as to solve the technical problems in the prior art that the existing beneficiation process has low recovery rate of fine particles comparable to that of wolframite and large dosage of chemicals.
The invention provides a comprehensive recovery beneficiation process for wolframite and associated valuable metals thereof, which comprises the following steps:
s1, crushing, grinding and floating the tungsten-molybdenum-copper polymetallic ore to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum floating tailings;
s2, grinding the copper-molybdenum mixed rough concentrate, floating molybdenum and inhibiting copper to separate so as to obtain molybdenum concentrate and copper concentrate;
s3, classifying the copper-molybdenum flotation tailings to obtain oversize products and undersize products;
s4, reselecting the oversize products to obtain reselected rough concentrate and reselected tailings;
s5, grinding and floating the gravity concentration rough concentrate to obtain tungsten concentrate 1;
and S6, grinding and floating the undersize product and the gravity tailings to obtain tungsten concentrate 2.
Compared with the prior art, the invention has the beneficial effects that:
the beneficiation process can effectively avoid over-crushing of the ore, gradually realize monomer dissociation, and obtain qualified tungsten concentrate, molybdenum concentrate and copper concentrate on the premise of ensuring the recovery rate, so that valuable elements in the ore are fully recovered, and the comprehensive utilization rate of resources is improved.
The beneficiation process has the advantages of simple process flow, small medicament dosage and low production cost.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the comprehensive recovery beneficiation process for tungsten ore and associated valuable metals thereof provided by the present invention;
FIG. 2 is a flow diagram of a beneficiation process provided in comparative example 1;
FIG. 3 is a flow diagram of a beneficiation process provided by comparative example 2;
FIG. 4 is a flow diagram of a beneficiation process provided by comparative example 3;
FIG. 5 is a flow chart of the "gravity concentration of tungsten ore-gravity tailings step flotation of polymetallic sulfide concentrate" process provided in comparative example 4;
figure 6 is a flow chart of the process of 'fractional flotation polymetallic sulfide concentrate-flotation tailings graded gravity concentration of tungsten ore' provided by comparative example 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a comprehensive recovery beneficiation process for wolframite and associated valuable metals thereof, which includes the following steps:
s1, crushing, grinding and floating the tungsten-molybdenum-copper polymetallic ore to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum floating tailings. According to the invention, the step S1 can avoid and prevent the excessive grinding of the ore, and the recovery of molybdenum and copper is ensured as much as possible.
And S2, grinding the copper-molybdenum mixed rough concentrate, floating molybdenum and inhibiting copper and separating to obtain molybdenum concentrate and copper concentrate. The present invention can further dissociate molybdenite monomer through step S2, thereby obtaining qualified molybdenum concentrate and copper concentrate.
S3, classifying the copper-molybdenum flotation tailings to obtain oversize products and undersize products.
And S4, reselecting the oversize products to obtain reselected rough concentrate and reselected tailings.
And S5, grinding and floating the gravity concentration rough concentrate to obtain tungsten concentrate 1. The invention can promote the further monomer dissociation of tungsten through the step S5, and can early recover tungsten; tungsten is recovered to the maximum extent through classification, reselection, stage grinding and multi-stage sorting.
And S6, grinding and floating the undersize product and the gravity tailings to obtain tungsten concentrate 2.
In the invention, the contents of tungsten, molybdenum and copper in the selected tungsten-molybdenum-copper multi-metal ore are not limited, and the technical personnel in the field can adopt the process of the invention to treat different tungsten-molybdenum-copper multi-metal ores according to actual conditions. In some embodiments of the invention, the tungsten content of the wolfram-moly-copper polymetallic ore is 0.01% to 10%, the molybdenum content is 0.01% to 10%, and the copper content is 0.01% to 10%.
In the present embodiment, in step S1, the tungsten-molybdenum-copper polymetallic ore is crushed and ground to a fineness of-0.075 mm, which accounts for 50% to 60%.
In this embodiment, in the flotation process of step S1, the concentration of the flotation pulp is 30% to 35%; the selected copper-molybdenum collecting agents are butyl xanthate and ethioamine, and the dosage of the copper-molybdenum collecting agents is 80-90 g/t and 10-20 g/t respectively; the selected foaming agent is methyl isobutyl carbinol, and the using amount is 20-30 g/t; the gangue inhibitor is water glass, and the using amount of the gangue inhibitor is 1000-1300 g/t.
In the present embodiment, in step S2, the ore is ground to a fineness of-0.038 mm, which accounts for 75% to 80%.
In this embodiment, the process of separating the floating molybdenum and the copper inhibitor in step S2 specifically includes: carrying out primary roughing on the copper-molybdenum mixed rough concentrate after ore grinding, then carrying out multiple concentration to obtain molybdenum concentrate, and carrying out multiple scavenging to obtain copper concentrate. Further, the concentration of the ore pulp is 30-35%; the collecting agent used for rough concentration is kerosene, and the using amount of the collecting agent is 10-20 g/t; the gangue inhibitor is water glass, and the using amount of the gangue inhibitor is 100-300 g/t; the inhibitor used for selecting molybdenum sulfide is sodium sulfide, and the total dosage is 100-200 g/t. Further, the number of culling is three to five; the number of scavenging times is two to four.
In this embodiment, the classification particle size in step S3 is 0.3mm, and the apparatus used is a high-frequency sieve.
In this embodiment, the oversize products in step S4 are reselected by a shaker to obtain reselected coarse concentrate and reselected tailings, and the inclination angle of the shaker is 2-4 °.
In the present embodiment, in step S5, the ore is ground to a fineness of-0.075 mm in the range of 70% to 75%.
In this embodiment, in the flotation process of step S5, the concentration of the ore pulp is 30% to 35%; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 100-200 g/t; the foaming agent is terpineol oil, and the using amount is 15-30 g/t; the regulator is sodium carbonate, and the dosage is 100-200 g/t; the gangue inhibitor is water glass, and the using amount of the gangue inhibitor is 50-200 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total using amount is 50-100 g/t; no medicine is added during scavenging. Furthermore, in the flotation process, the selection times are three to five, and the scavenging is performed once.
In the embodiment, in the step S6, the ore is ground until the fineness is-0.075 mm, which accounts for 80-85%.
In the embodiment, in step S6, the concentration of the flotation pulp is 30% to 35%; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 100-200 g/t; the amount of the pinitol oil used as the foaming agent is 15-30 g/t; sodium carbonate is used as a regulator, and the dosage is 100-200 g/t; the amount of the water glass for the gangue inhibitor is 100-200 g/t; collecting agent used for fine selection is oxidized paraffin soap, and the total using amount is 80-120 g/t; no medicine is added during scavenging. In the flotation process, the selection times are three to six, and the scavenging times are two to three.
In the present invention, it should be noted that the above-mentioned dosage is calculated according to the weight of the mineral powder feed at each stage.
Example 1
In a certain ore body in Jiangxi, the ore contains 0.119 percent of tungsten, 0.1 percent of molybdenum and 0.2 percent of copper, and the dosage of raw ore is 300 g.
The beneficiation process comprises the following steps:
(1) grinding the crushed ore until the fineness is 55 percent of minus 0.075mm, and then performing primary roughing to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum flotation tailings; wherein, the concentration of the flotation pulp is 30 percent; the copper molybdenum collecting agents are butyl xanthate and ethioamine, and the dosage is 85g/t and 15g/t respectively; the foaming agent is methyl isobutyl carbinol, and the dosage is 25 g/t; the gangue inhibitor is water glass, and the using amount is 1200 g/t;
(2) grinding the copper-molybdenum mixed rough concentrate until the fineness is-0.038 mm and accounts for 77%, then adopting floating molybdenum to inhibit copper separation, performing once rough concentration and four-time fine concentration to obtain molybdenum concentrate, and performing three-time scavenging to obtain copper concentrate; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is kerosene with the dosage of 15g/t, and the gangue inhibitor is water glass with the dosage of 200 g/t; the inhibitor used for selecting molybdenum sulfide is sodium sulfide, and the total dosage is 150 g/t; no medicine is added during scavenging;
(3) classifying the copper-molybdenum flotation tailings by a high-frequency sieve, and classifying the copper-molybdenum flotation tailings into two grades of plus 0.3mm and minus 0.3mm to obtain oversize products and undersize products;
(4) reselecting the oversize products through a table concentrator to obtain reselected rough concentrate and reselected tailings; wherein, the inclination angle of the shaking table is 3 degrees;
(5) grinding the gravity concentration rough concentrate until the fineness is-0.075 mm and accounts for 73%, and then performing primary rough concentration, four-time fine concentration and primary scavenging to obtain tungsten concentrate 1; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 100 g/t; the foaming agent is terpineol oil, and the dosage is 20 g/t; the regulator is sodium carbonate, and the dosage is 100 g/t; the gangue inhibitor is water glass, and the using amount is 100 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 70 g/t; no medicine is added during scavenging;
(6) grinding the gravity tailings and the undersize until the fineness is-0.075 mm and accounts for 83%, and then performing one-time roughing, five-time fine selection and three-time scavenging to obtain tungsten concentrate 2; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 200 g/t; the foaming agent is terpineol oil, and the dosage is 20 g/t; the regulator is sodium carbonate, and the dosage is 150 g/t; the gangue inhibitor is water glass, and the dosage is 150 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 100 g/t; no medicine is added during scavenging.
Example 2
The ore contains 0.13% of tungsten, 0.09% of molybdenum and 0.30% of copper, and the amount of raw ore is 300 g.
The beneficiation process comprises the following steps:
(1) grinding the crushed ore until the fineness is-0.075 mm and accounts for 60%, and then performing primary roughing to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum flotation tailings; wherein, the concentration of the flotation pulp is 30 percent; the copper molybdenum collecting agents are butyl xanthate and ethioamine, and the dosage is 80g/t and 20g/t respectively; the foaming agent is methyl isobutyl carbinol, and the dosage is 30 g/t; the gangue inhibitor is water glass, and the dosage is 1000 g/t;
(2) grinding the copper-molybdenum mixed rough concentrate until the fineness is-0.038 mm and accounts for 80%, then adopting floating molybdenum to inhibit copper separation, performing once rough concentration and four-time fine concentration to obtain molybdenum concentrate, and performing three-time scavenging to obtain copper concentrate; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is kerosene with the dosage of 10g/t, and the gangue inhibitor is water glass with the dosage of 100 g/t; the inhibitor used for selecting molybdenum sulfide is sodium sulfide, and the total dosage is 200 g/t; no medicine is added during scavenging;
(3) classifying the copper-molybdenum flotation tailings by a high-frequency sieve, and classifying the copper-molybdenum flotation tailings into two grades of plus 0.3mm and minus 0.3mm to obtain oversize products and undersize products;
(4) reselecting the oversize products through a table concentrator to obtain reselected rough concentrate and reselected tailings; wherein, the inclination angle of the shaking table is 4 degrees;
(5) grinding the gravity concentration rough concentrate until the fineness is-0.075 mm and accounts for 70%, and then performing once rough concentration, four times of fine concentration and once scavenging to obtain tungsten concentrate 1; wherein, the concentration of the flotation pulp is 35 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 150 g/t; the foaming agent is terpineol oil, and the dosage is 30 g/t; the regulator is sodium carbonate, and the dosage is 150 g/t; the gangue inhibitor is water glass, and the dosage is 50 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 100 g/t; no medicine is added during scavenging;
(6) grinding the gravity tailings and the undersize until the fineness is-0.075 mm and accounts for 85%, and then performing one-time roughing, five-time fine selection and three-time scavenging to obtain tungsten concentrate 2; wherein, the concentration of the flotation pulp is 35 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 100 g/t; the foaming agent is terpineol oil, and the dosage is 30 g/t; the regulator is sodium carbonate, and the dosage is 100 g/t; the gangue inhibitor is water glass, and the using amount is 200 g/t; collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 80 g/t; no medicine is added during scavenging.
Example 3
The Liaoning ore contains tungsten 0.113%, molybdenum 0.082% and copper 0.35%, and the raw ore is 300 g.
The beneficiation process comprises the following steps:
(1) crushing the ore, grinding the crushed ore until the fineness of the crushed ore is-0.075 mm and accounts for 50%, and then performing primary roughing to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum flotation tailings; wherein, the concentration of the flotation pulp is 35 percent; the copper molybdenum collecting agents are butyl xanthate and ethioamine, and the dosage is 90g/t and 10g/t respectively; the foaming agent is methyl isobutyl carbinol, and the dosage is 20 g/t; the gangue inhibitor is water glass, and the using amount is 1300 g/t;
(2) grinding the copper-molybdenum mixed rough concentrate until the fineness is-0.038 mm and accounts for 75%, then performing copper suppression separation by using floating molybdenum, performing once rough concentration, performing four-time fine concentration to obtain molybdenum concentrate, and performing three-time scavenging to obtain copper concentrate; wherein, the concentration of the flotation pulp is 35 percent; the collecting agent used for roughing is kerosene with the dosage of 20g/t, and the gangue inhibitor is water glass with the dosage of 300 g/t; the inhibitor used for selecting molybdenum sulfide is sodium sulfide, and the total dosage is 100 g/t; no medicine is added during scavenging;
(3) classifying the copper-molybdenum flotation tailings by a high-frequency sieve, and classifying the copper-molybdenum flotation tailings into two grades of plus 0.3mm and minus 0.3mm to obtain oversize products and undersize products;
(4) reselecting the oversize products through a table concentrator to obtain reselected rough concentrate and reselected tailings; wherein, the inclination angle of the shaking table is 2 degrees;
(5) grinding the gravity concentration rough concentrate until the fineness is-0.075 mm and accounts for 75%, and then performing once rough concentration, four times of fine concentration and once scavenging to obtain tungsten concentrate 1; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 200 g/t; the foaming agent is terpineol oil, and the dosage is 15 g/t; the regulator is sodium carbonate, and the dosage is 200 g/t; the gangue inhibitor is water glass, and the using amount is 200 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 50 g/t; no medicine is added during scavenging;
(6) grinding the gravity tailings and the undersize until the fineness is-0.075 mm and accounts for 80%, and then performing one-time roughing, five-time fine selection and three-time scavenging to obtain tungsten concentrate 2; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 150 g/t; the foaming agent is terpineol oil, and the dosage is 15 g/t; the regulator is sodium carbonate, and the dosage is 200 g/t; the gangue inhibitor is water glass, and the using amount is 100 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 120 g/t; no medicine is added during scavenging.
Comparative example 1
The ore was sourced from example 1, and the amount of raw ore used was 300 g.
Referring to fig. 2, comparative example 1 differs from example 1 only in that: in the step (1) of the comparative example 1, the ore is crushed and ground to a fineness of-0.075 mm accounting for 70%.
Comparative example 2
The ore was sourced from example 1, and the amount of raw ore used was 300 g.
Referring to fig. 3, comparative example 2 differs from example 1 only in that: comparative example 2 no classification process was performed, and the specific beneficiation process included the following steps:
(1) grinding the crushed ore until the fineness is 55 percent of minus 0.075mm, and then performing primary roughing to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum flotation tailings; wherein, the concentration of the flotation pulp is 30 percent; the copper molybdenum collecting agents are butyl xanthate and ethioamine, and the dosage is 85g/t and 15g/t respectively; the foaming agent is methyl isobutyl carbinol, and the dosage is 25 g/t; the gangue inhibitor is water glass, and the using amount is 1200 g/t;
(2) grinding the copper-molybdenum mixed rough concentrate until the fineness is-0.038 mm and accounts for 77%, then adopting floating molybdenum to inhibit copper separation, performing once rough concentration and four-time fine concentration to obtain molybdenum concentrate, and performing three-time scavenging to obtain copper concentrate; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is kerosene with the dosage of 15g/t, and the gangue inhibitor is water glass with the dosage of 200 g/t; the inhibitor used for selecting molybdenum sulfide is sodium sulfide, and the total dosage is 150 g/t; no medicine is added during scavenging;
(3) reselecting the copper-molybdenum flotation tailings through a table concentrator to obtain reselected rough concentrate and reselected tailings, wherein the inclination angle of the table concentrator is 3 degrees;
(4) grinding the gravity concentration rough concentrate until the fineness is-0.075 mm and accounts for 73%, and then performing primary rough concentration, four-time fine concentration and primary scavenging to obtain tungsten concentrate 1; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 100 g/t; the foaming agent is terpineol oil, and the dosage is 20 g/t; the regulator is sodium carbonate, and the dosage is 100 g/t; the gangue inhibitor is water glass, and the using amount is 100 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 70 g/t; no medicine is added during scavenging;
(5) grinding the gravity tailings until the fineness is-0.075 mm and accounts for 83%, and then performing one-time rough concentration, five-time fine concentration and three-time scavenging to obtain tungsten concentrate 2; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 200 g/t; the foaming agent is terpineol oil, and the dosage is 20 g/t; the regulator is sodium carbonate, and the dosage is 150 g/t; the gangue inhibitor is water glass, and the dosage is 150 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 100 g/t; no medicine is added during scavenging.
Comparative example 3
The ore was sourced from example 1, and the amount of raw ore used was 300 g.
Referring to fig. 4, comparative example 3 differs from example 1 only in that: comparative example 3 no reselection process was performed, and the specific beneficiation process included the following steps:
(1) grinding the crushed ore until the fineness is 55 percent of minus 0.075mm, and then performing primary roughing to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum flotation tailings; wherein, the concentration of the flotation pulp is 30 percent; the copper molybdenum collecting agents are butyl xanthate and ethioamine, and the dosage is 85g/t and 15g/t respectively; the foaming agent is methyl isobutyl carbinol, and the dosage is 25 g/t; the gangue inhibitor is water glass, and the using amount is 1200 g/t;
(2) grinding the copper-molybdenum mixed rough concentrate until the fineness is-0.038 mm and accounts for 77%, then adopting floating molybdenum to inhibit copper separation, performing once rough concentration and four-time fine concentration to obtain molybdenum concentrate, and performing three-time scavenging to obtain copper concentrate; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is kerosene with the dosage of 15g/t, and the gangue inhibitor is water glass with the dosage of 200 g/t; the inhibitor used for selecting molybdenum sulfide is sodium sulfide, and the total dosage is 150 g/t; no medicine is added during scavenging;
(3) classifying the copper-molybdenum flotation tailings by a high-frequency sieve, and classifying the copper-molybdenum flotation tailings into two grades of plus 0.3mm and minus 0.3mm to obtain oversize products and undersize products;
(4) grinding the oversize materials to a fineness of-0.075 mm accounting for 73%, and then performing primary roughing, four-time fine separation and primary scavenging to obtain tungsten concentrate 1; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 100 g/t; the foaming agent is terpineol oil, and the dosage is 20 g/t; the regulator is sodium carbonate, and the dosage is 100 g/t; the gangue inhibitor is water glass, and the using amount is 100 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 70 g/t; no medicine is added during scavenging;
(5) grinding the undersize materials to a fineness of 83% of minus 0.075mm, and then performing one-time rough concentration, five-time fine concentration and three-time scavenging to obtain tungsten concentrate 2; wherein, the concentration of the flotation pulp is 30 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 200 g/t; the foaming agent is terpineol oil, and the dosage is 20 g/t; the regulator is sodium carbonate, and the dosage is 150 g/t; the gangue inhibitor is water glass, and the dosage is 150 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total dosage is 100 g/t; no medicine is added during scavenging.
Comparative example 4
The ore was sourced from example 1, and the amount of raw ore used was 300 g.
Referring to fig. 5, the beneficiation process includes the following steps:
(1) grinding the crushed ore until the fineness of the crushed ore is-0.074 mm and accounts for 70%, and then performing gravity separation to obtain gravity separation tungsten rough concentrate and gravity separation tailings; wherein the equipment used for reselection is a shaking table;
(2) performing primary roughing, four-time concentration and one scavenging on the gravity concentration tungsten rough concentrate to obtain tungsten concentrate; wherein, the concentration of the ore pulp is 30 percent, and 150g/t of sodium carbonate, 1000g/t of sodium sulfide, 800g/t of water glass and 50g/t of fatty acid soap are added;
(3) regrinding the gravity tailings until the gravity tailings are-0.074 mm and account for 90 percent, then carrying out copper-molybdenum mixed separation by adopting kerosene and O-isopropyl-N-ethyl thionocarbamate, and carrying out four-time separation to obtain copper-molybdenum mixed concentrate; wherein the concentration of the ore pulp is 30 percent, and the dosages of the kerosene and the O-isopropyl-N-ethyl thiourethane are respectively 320g/t and 20 g/t; adopting water glass as an inhibitor, wherein the dosage is 1800g/t, and inhibiting gangue minerals in the ore;
(4) regrinding the copper-molybdenum bulk concentrate, wherein the grinding fineness is-0.045 mm and accounts for 90%, then carrying out copper-molybdenum separation, the concentration of ore pulp is 30%, and the removal of the chemical from the copper-molybdenum separation is carried out by adopting sodium sulfide, and the dosage is 800 g/t; sodium thioglycolate is adopted for inhibiting copper, and the dosage is 40 g/t; water glass is used as a gangue inhibitor, and the dosage is 200 g/t; collecting molybdenum by adopting kerosene, wherein the using amount is 20 g/t; the separation and concentration times are four times, the obtained middlings are returned sequentially, and the final copper concentrate and molybdenum concentrate are obtained through separation.
Comparative example 5
The ore was sourced from example 1, and the amount of raw ore used was 300 g.
Referring to fig. 6, the beneficiation process includes the following steps:
(1) grinding the crushed ore until the fineness of the crushed ore is-0.075 mm and accounts for 63%, and then carrying out flotation to obtain molybdenum concentrate and molybdenum flotation tailings; wherein, water glass is adopted as an inhibitor, the dosage is 1200g/t, kerosene is adopted as molybdenite collecting, and the dosage is 180 g/t;
(2) and (2) regrinding the molybdenum flotation tailings until the diameter of the molybdenum flotation tailings is-0.074 mm and the molybdenum flotation tailings accounts for 90%, and then obtaining copper concentrate and copper flotation tailings through once roughing, three times of fine concentration and once scavenging: wherein, the concentration of the ore pulp is 30 percent, 1500g/t of quicklime, 100g/t of butyl xanthate, 13.0g/t of ethionamide and 300g/t of water glass are added in the rough concentration, and the mixture is stirred for five minutes; and (3) selecting for three times: adding 200g/t, 200g/t and 100g/t of quick lime into the first selection, the second selection and the third selection respectively, and stirring for four minutes; no medicament is added in one time of scavenging, and the mixture is stirred for two minutes;
(3) classifying the copper flotation tailings by a high-frequency sieve, classifying the copper flotation tailings into two grades of +0.4mm and-0.4 mm, and respectively reselecting; reselecting the part with the diameter of +0.4mm by using a jigger to obtain tungsten concentrate 1; the jigging tailings are ground to-0.075 mm and 70-75 percent and returned to the high-frequency sieve; and reselecting the part of-0.4 mm by using a table concentrator to obtain tungsten concentrate 2.
The grades and recovery rates of the tungsten concentrate, molybdenum concentrate and copper concentrate obtained in examples 1 to 3 and comparative examples 1 to 5 are summarized as follows:
TABLE 1
Compared with the prior art, the invention has the beneficial effects that:
(1) monomer dissociation can be gradually realized through stage grinding and stage sorting, the problems of excessive fine mud, high energy consumption and the like caused by over grinding of molybdenite and tungsten ore are effectively avoided, and qualified molybdenum concentrate and tungsten concentrate are obtained on the premise of ensuring the recovery rate;
(2) the flotation method has the advantages that the flotation sulfide concentrate is preferentially mixed, and then molybdenum is floated to inhibit copper and is separated, so that the dosage of a flotation reagent can be effectively reduced, and the cost of the flotation reagent is reduced;
(3) the tungsten ore adopts a heavy-floating combined separation process, so that the tungsten concentrate grade and the comprehensive recovery rate of the tungsten ore of each granularity grade can be improved to the maximum extent;
(4) the valuable elements of tungsten, molybdenum and copper in the ore are fully recovered, the recovery rate of tungsten, molybdenum and copper is improved compared with that of the traditional mineral separation process, and the comprehensive utilization rate of resources is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A comprehensive recovery beneficiation process for wolframite and associated valuable metals thereof is characterized by comprising the following steps:
s1, crushing, grinding and floating the tungsten-molybdenum-copper polymetallic ore to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum floating tailings;
s2, grinding the copper-molybdenum mixed rough concentrate, and carrying out molybdenum floating and copper suppression separation to obtain molybdenum concentrate and copper concentrate;
s3, classifying the copper-molybdenum flotation tailings to obtain oversize products and undersize products;
s4, reselecting the oversize product to obtain reselected rough concentrate and reselected tailings;
s5, grinding and floating the gravity concentration rough concentrate to obtain tungsten concentrate 1;
and S6, grinding and floating the undersize product and the gravity tailings to obtain tungsten concentrate 2.
2. The comprehensive recovery beneficiation process for the wolframite and associated valuable metals thereof according to claim 1, wherein in the step S1, the wolframite-molybdenum-copper polymetallic ore is crushed and ground to a fineness of-0.075 mm accounting for 50% -60%.
3. The comprehensive recovery beneficiation process for the wolframite and associated valuable metals thereof according to claim 1, wherein in the flotation process of the step S1, the concentration of the flotation pulp is 30-35%; the selected copper-molybdenum collecting agents are butyl xanthate and ethioamine, and the dosage of the copper-molybdenum collecting agents is 80-90 g/t and 10-20 g/t respectively; the selected foaming agent is methyl isobutyl carbinol, and the using amount is 20-30 g/t; the gangue inhibitor is water glass, and the using amount of the gangue inhibitor is 1000-1300 g/t.
4. The comprehensive recovery beneficiation process for the wolframite and associated valuable metals thereof according to claim 1, wherein in the step S2, the ore is ground to a fineness of-0.038 mm accounting for 75-80%.
5. The comprehensive recovery beneficiation process for the wolframite and the associated valuable metals thereof according to claim 1, wherein the molybdenum floating and copper inhibiting separation process in the step S2 is specifically as follows: carrying out primary roughing on the copper-molybdenum mixed rough concentrate after ore grinding, then carrying out multiple concentration to obtain molybdenum concentrate, and carrying out multiple scavenging to obtain copper concentrate.
6. The comprehensive recovery beneficiation process for the wolframite and associated valuable metals thereof according to claim 5, wherein in the separation process of molybdenum flotation and copper inhibition, the concentration of ore pulp is 30-35%; the collecting agent used for rough concentration is kerosene, and the using amount of the collecting agent is 10-20 g/t; the gangue inhibitor is water glass, and the using amount of the gangue inhibitor is 100-300 g/t; the inhibitor used for selecting molybdenum sulfide is sodium sulfide, and the total dosage is 100-200 g/t.
7. The comprehensive recovery beneficiation process for the wolframite and the concomitant valuable metals thereof according to claim 1, characterized in that, in the step S3, the classification particle size is 0.3 mm.
8. The comprehensive recovery beneficiation process for the wolframite and associated valuable metals thereof according to claim 1, wherein in the step S5, grinding is performed until the fineness is-0.075 mm, which accounts for 70-75%.
9. The comprehensive recovery beneficiation process for the wolframite and associated valuable metals thereof according to claim 1, wherein in the flotation process of the step S5, the concentration of ore pulp is 30-35%; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 100-200 g/t; the foaming agent is terpineol oil, and the using amount is 15-30 g/t; the regulator is sodium carbonate, and the dosage is 100-200 g/t; the gangue inhibitor is water glass, and the using amount of the gangue inhibitor is 50-200 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total using amount is 50-100 g/t.
10. The comprehensive recovery beneficiation process for the wolframite and associated valuable metals thereof according to claim 1, wherein in the step S6, grinding is carried out until the fineness is-0.075 mm, which accounts for 80-85%; in the flotation process, the concentration of the ore pulp is 30-35 percent; the collecting agent used for roughing is oxidized paraffin soap, and the using amount is 100-200 g/t; the amount of the pinitol oil used as the foaming agent is 15-30 g/t; sodium carbonate is used as a regulator, and the dosage is 100-200 g/t; the amount of the water glass for the gangue inhibitor is 100-200 g/t; the collecting agent used for fine selection is oxidized paraffin soap, and the total using amount is 80-120 g/t.
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