CN112718235B - Tungsten-tin comprehensive recovery combined reselection method - Google Patents
Tungsten-tin comprehensive recovery combined reselection method Download PDFInfo
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- CN112718235B CN112718235B CN202011281407.8A CN202011281407A CN112718235B CN 112718235 B CN112718235 B CN 112718235B CN 202011281407 A CN202011281407 A CN 202011281407A CN 112718235 B CN112718235 B CN 112718235B
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- flotation
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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
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
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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 relates to a beneficiation method of non-ferrous metal ores, in particular to a tungsten-tin comprehensive recovery combined gravity separation method, which comprises the following steps: roughing shaking table, scavenging shaking table, flotation, secondary flotation of flotation grading tank, fine shaking table flotation, drying dehydration and magnetic separation grading. The method overcomes the defects that the existing tungsten and tin recovery rate and the existing taste are low and unstable, and cannot reach the tungsten and tin concentrate grade, has simple process and high tungsten and tin recovery rate, can obtain more than 65 percent of tungsten concentrate and more than 45 percent of tin concentrate through the secondary flotation of the flotation grading tank, and has obvious economic benefit.
Description
Technical Field
The invention relates to a beneficiation method of nonferrous metal ores, in particular to a tungsten-tin comprehensive recovery combined reselection method.
Background
Along with the rapid development of economy, the resource consumption is increased, so that the tension degree of mineral resource supply is increased, a large amount of mineral tailings are discharged while the mineral resources are rapidly developed, huge risks are brought to the environment, and more importantly, the resource is greatly wasted. Tungsten and tin resources are a scarce resource, and all countries in the world pay attention to and protect the tungsten and tin resources as an important strategic resource. Therefore, how to adopt a new beneficiation technology to fully utilize tungsten and tin resources has very important significance for the sustainable development of mines.
At present, tungsten and tin ore are recycled mainly according to the element content and the ore property, and tin ore usually adopts a single-gravity separation, a magnetic separation-gravity separation, a centrifugal ore separation-flotation or a combined flow of several processes to recycle tin resources; for the recycling of tungsten ore, the following methods are usually adopted: the tungsten and tin back-separation technologies have the defects of low recovery rate of tungsten and tin, low grade of recovered resources, incapability of reaching the tungsten and tin concentrate grade and the like. Because the tungsten and tin ores are complex in property and poor in selectivity, the conventional ore dressing technology at the present stage is adopted to recycle the tungsten and tin, the recovery rate and the taste of the produced concentrate are low and unstable, the economic benefit is poor, and the comprehensive utilization difficulty is high. Therefore, it is urgently needed to design and optimize the gravity separation process reasonably according to the characteristics of the tungsten-containing and tin-containing ores and develop an economic and efficient new method for gravity separation of the tungsten-containing and tin-containing ores.
Disclosure of Invention
The invention provides a tungsten-tin comprehensive recovery combined reselection method, which solves the defects that the existing tungsten and tin recovery rate and taste are low and unstable, and the grades of tungsten and tin concentrate cannot be reached.
In order to solve the technical problem, the invention provides a tungsten-tin comprehensive recovery combined reselection method, which comprises the following steps:
(1) Roughing shaking table
Separating coarse sand, fine sand and fine mud from the tailings subjected to copper and zinc flotation, and then performing table shaking operation, wherein the table shaking operation comprises a first coarse sand table, a second fine sand table and a third fine mud table;
(2) Sweeping and selecting shaking table
Putting the middlings obtained by the rough concentration table concentrator into a scavenging table concentrator for operation, wherein the scavenging table concentrator comprises a first-stage coarse sand table concentrator, a second-stage fine sand table concentrator and a third-stage fine mud table concentrator, and mixed concentrate containing 0.7% of tungsten and 0.3% of tin can be obtained;
(3) Flotation
Feeding the bulk concentrate obtained by the scavenging table into a self-suction flotation machine for flotation, adding sulfuric acid during flotation to adjust the pH value of ore pulp to 8, and then sequentially adding a collecting agent, namely butyl xanthate, a foaming agent, namely pine oil and an activating agent, namely copper sulfate to obtain bulk concentrate containing 13.5% of tungsten and 3% of tin;
(4) Secondary flotation of flotation grading tank
Discharging the bulk concentrate obtained by flotation into a stirring barrel, adding sulfuric acid to adjust the pH value of ore pulp to 4, then sequentially adding a collecting agent of butyl xanthate, a foaming agent of pinitol oil and an activating agent of copper sulfate, quantitatively discharging the ore pulp into a flotation grading tank by using an ore pulp distributor, and performing secondary flotation to obtain bulk concentrate containing 35% of tungsten and 8% of tin;
(5) Flotation of fine shaking table
Performing primary roughing table concentrator and secondary scavenging table concentrator on the tailings thrown out by the secondary flotation of the flotation grading tank to obtain mixed concentrate containing 23% of tungsten and 5% of tin;
(6) Drying and dewatering
Drying the bulk concentrate obtained in the step (4) and the bulk concentrate obtained in the step (5) through a drying box, and controlling the water content of the bulk concentrate to be within 0.5%;
(7) Magnetic separation and classification
And (3) grading the dried bulk concentrate by a three-disk magnetic separator to obtain more than 65% of tungsten concentrate and more than 45% of tin concentrate.
Further, in the rough concentration table in the step (1), a coarse sand table in the first section adopts 64 grooves, a fine sand table in the second section adopts 90 grooves, and a mud table adopts 120 grooves.
Further, in the sweeping and selecting table in the step (2), a coarse sand table in the first section adopts 64 grooves, a fine sand table in the second section adopts 90 grooves, and a fine mud table in the third section adopts 120 grooves.
Further, the flotation classifying tank in the step (3) is of a slope structure, the length of the flotation classifying tank is 5m, the width of the flotation classifying tank is 3m, the slope inclination angle is 20-45 degrees, an atomization water gun is arranged above the flotation classifying tank, water flow jetted by the atomization water gun is used for scattering and washing ore pulp, tungsten and tin metals are settled on the bottommost layer and a broken surface with a larger gradient, the metals with different grain grades and different specific gravities and gangue are classified by utilizing the multi-angle slope of the flotation classifying tank, then the metals with different densities are scattered and washed again by the washing of the water flow and the high-pressure atomization water gun, finally the tungsten and tin metals with larger specific gravities are settled on the bottommost layer and the broken surface with a larger gradient, and the metals with lighter specific gravities and gangue are discharged out of the flotation classifying tank under the actions of medicaments, densities, gradients, water flows and the like.
The tungsten-tin comprehensive recovery combined reselection method provided by the invention has the following advantages:
the method has the advantages of simple process and high recovery rate of tungsten and tin, can obtain more than 65 percent of tungsten concentrate and more than 45 percent of tin concentrate through the secondary flotation of the flotation grading tank, and has obvious economic benefit.
Drawings
FIG. 1 is a flow chart of a tungsten-tin comprehensive recovery combined gravity separation process;
fig. 2 is a structural schematic diagram of a flotation classification tank.
Detailed Description
In order to make the objects and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A tungsten-tin comprehensive recovery combined reselection method comprises the following steps:
(1) Roughing shaking table
Separating coarse sand, fine sand and fine mud from the tailings subjected to copper and zinc flotation, and performing table shaking operation, wherein the table shaking operation comprises a first coarse sand table, a second fine sand table and a third fine mud table, the first coarse sand table adopts 64 grooves, the second fine sand table adopts 90 grooves, and the mud table adopts 120 grooves;
(2) Sweeping and selecting shaking table
The middlings obtained by the rough concentration table concentrator enter a scavenging table concentrator for operation, and mixed concentrate containing 0.7% of tungsten and 0.3% of tin can be obtained by using a first-stage coarse sand table concentrator, a second-stage fine sand table concentrator and a third-stage fine mud table concentrator, wherein the first-stage coarse sand table concentrator adopts 64 grooves, the second-stage fine sand table concentrator adopts 90 grooves, and the mud table concentrator adopts 120 grooves;
(3) Flotation
Sending the bulk concentrate obtained by the scavenging table concentrator into a self-suction flotation machine for flotation, adding sulfuric acid during flotation to adjust the pH value of ore pulp to 8, and then sequentially adding a collecting agent, namely butyl xanthate, a foaming agent, namely pine oil and an activating agent, namely copper sulfate to obtain bulk concentrate containing 13.5% of tungsten and 3% of tin;
(4) Secondary flotation of flotation grading tank
Discharging the bulk concentrate obtained by flotation into a stirring barrel, adding sulfuric acid to adjust the pH value of ore pulp to 4, then sequentially adding a collecting agent of butyl xanthate, a foaming agent of pinitol oil and an activating agent of copper sulfate, quantitatively discharging the ore pulp into a flotation grading tank by using an ore pulp distributor, and performing secondary flotation to obtain bulk concentrate containing 35% of tungsten and 8% of tin; the flotation grading tank is of a slope structure, the length of the flotation grading tank is 5m, the width of the flotation grading tank is 3m, the slope inclination angle is 20-45 degrees, an atomization water gun is arranged above the flotation grading tank, the atomization water gun sprays water flow to break up and wash ore pulp, tungsten and tin metal are made to settle on the bottommost layer and a broken surface with a larger slope, different grain grades and metals and gangue with different specific gravities are graded by means of multi-angle slope of the flotation grading tank, the metals and gangue with different densities are broken up and washed by the aid of the water flow washing and the high-pressure atomization water gun continuously to enable the metals with different densities to settle again, the tungsten and tin metal with the larger specific gravities are finally settled on the bottommost layer and the broken surface with the larger slope, and the metal and gangue with the lighter specific gravities are discharged out of the flotation grading tank under the effects of flotation reagents, densities, slopes, water flows and the like.
(5) Flotation in fine shaking table
Performing primary roughing shaking table and secondary scavenging shaking table on the tailings thrown by the secondary flotation of the flotation grading tank to obtain mixed concentrate containing 23% of tungsten and 5% of tin;
(6) Drying and dewatering
Drying the bulk concentrate obtained in the step (4) and the bulk concentrate obtained in the step (5) through a drying box, and controlling the water content of the bulk concentrate within 0.5%;
(7) Magnetic separation and classification
And (3) grading the dried bulk concentrate by a three-disk magnetic separator to obtain more than 65% of tungsten concentrate and more than 45% of tin concentrate.
Claims (4)
1. A tungsten-tin comprehensive recovery combined reselection method is characterized by comprising the following steps:
(1) Roughing shaking table
Separating coarse sand, fine sand and fine mud from the tailings subjected to copper and zinc flotation, and then performing table shaking operation, wherein the table shaking operation comprises a first coarse sand table, a second fine sand table and a third fine mud table;
(2) Sweeping and selecting shaking table
The middlings obtained by the roughing shaking table are put into a scavenging shaking table operation, and the scavenging shaking table operation comprises a first-stage coarse sand shaking table, a second-stage fine sand shaking table and a third-stage fine mud shaking table, so that mixed concentrate containing 0.7% of tungsten and 0.3% of tin can be obtained;
(3) Flotation
Feeding the bulk concentrate obtained by the scavenging table into a self-suction flotation machine for flotation, adding sulfuric acid during flotation to adjust the pH value of ore pulp to 8, and then sequentially adding a collecting agent, namely butyl xanthate, a foaming agent, namely pine oil and an activating agent, namely copper sulfate to obtain bulk concentrate containing 13.5% of tungsten and 3% of tin;
(4) Secondary flotation of flotation grading tank
Discharging the bulk concentrate obtained by flotation into a stirring barrel, adding sulfuric acid to adjust the pH value of ore pulp to 4, then sequentially adding a collecting agent of butyl xanthate, a foaming agent of pinitol oil and an activating agent of copper sulfate, quantitatively discharging the ore pulp into a flotation grading tank by using an ore pulp distributor, and performing secondary flotation to obtain bulk concentrate containing 35% of tungsten and 8% of tin;
(5) Flotation of fine shaking table
Performing primary roughing table concentrator and secondary scavenging table concentrator on the tailings thrown out by the secondary flotation of the flotation grading tank to obtain mixed concentrate containing 23% of tungsten and 5% of tin;
(6) Drying and dewatering
Drying the bulk concentrate obtained in the step (4) and the bulk concentrate obtained in the step (5) through a drying box, and controlling the water content of the bulk concentrate within 0.5%;
(7) Magnetic separation and classification
And (3) grading the dried bulk concentrate by a three-disk magnetic separator to obtain more than 65% of tungsten concentrate and more than 45% of tin concentrate.
2. The integrated recovery and combined reselection method for tungsten and tin according to claim 1, characterized in that: and (2) adopting 64 grooves for a coarse sand table in the first section of the rough concentration table in the step (1), adopting 90 grooves for a second section of the fine sand table, and adopting 120 grooves for a third section of the fine mud table.
3. The integrated recovery and combined reselection method for tungsten and tin according to claim 1, characterized in that: and (3) adopting 64 grooves for a coarse sand shaking table in the first section of the sweeping and selecting shaking table in the step (2), adopting 90 grooves for a fine sand shaking table in the second section, and adopting 120 grooves for a fine mud shaking table in the third section.
4. The integrated recovery and combined reselection method for tungsten and tin according to claim 1, characterized in that: the flotation classifying tank in the step (3) adopts a slope structure, the length is 5m, the width is 3m, the slope inclination angle is 15-45 degrees, an atomization water gun is arranged above the flotation classifying tank, and the atomization water gun sprays water flow to break up and wash ore pulp, so that tungsten and tin metal are settled on the slope surface with the bottommost layer and the larger slope.
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| US9682405B2 (en) * | 2014-08-23 | 2017-06-20 | Vortex Technology, Llc | Systems and methods for the environmental remediation of materials contaminated with heavy minerals |
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