CN111871596A - System for treating gold ore flotation tailing mud and processing technology for producing raw materials for buildings by using system - Google Patents
System for treating gold ore flotation tailing mud and processing technology for producing raw materials for buildings by using system Download PDFInfo
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- CN111871596A CN111871596A CN202010710888.3A CN202010710888A CN111871596A CN 111871596 A CN111871596 A CN 111871596A CN 202010710888 A CN202010710888 A CN 202010710888A CN 111871596 A CN111871596 A CN 111871596A
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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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- 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
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
- B03B5/04—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on shaking tables
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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
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
- B03B5/626—Helical separators
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Abstract
The invention relates to a system for treating gold ore flotation tailing mud and a processing technology for producing raw materials for buildings by using the system, and belongs to the technical field of solid waste treatment. In order to solve the defects of low mixing amount, low utilization rate, high energy consumption and the like of the existing gold ore flotation tailing mud utilization technology and incapability of consuming a large amount of tailing mud, the system for treating the gold ore flotation tailing mud and the processing technology for producing raw materials for buildings by using the system are provided. The process comprises the steps of (a) mortar blending, (b) preselection, (c) selection, (d) dehydration, drying, (e) magnetic separation, (f) grading screening, (g) and precipitation.
Description
Technical Field
The invention relates to a system for treating tailing slurry and a processing technology for producing raw materials for buildings by using the system, in particular to a system for treating gold ore flotation tailing slurry and a processing technology for producing raw materials for buildings by using the system, and belongs to the technical field of solid waste treatment.
Background
The gold ore flotation tailing mud is waste mud residue generated in the flotation production process of gold sulfide ore, and the ore takes quartz and feldspar as main components. The method has the characteristics of land occupation, resource waste, environmental pollution, potential safety hazard and the like, so that the comprehensive utilization of the gold ore flotation tailing mud becomes a major topic for the development of mineral engineering in China. Therefore, domestic expert scholars do a great deal of research work on comprehensive treatment of gold ore flotation tailing mud, and a lot of remarkable progress is also made. However, the total amount of gold ore flotation tailing mud in China is about billions of tons, the comprehensive utilization rate is only about 5%, and the method is far away from the advanced level of 60% of foreign comprehensive utilization rate.
At present, gold ore flotation tailing mud is generally made into foamed bricks, cement bricks, aerated bricks, foamed ceramics, sintered ceramsite and the like, and the manufactured products have the defects of low mixing amount, low utilization rate, high energy consumption and the like, and can not consume a large amount of tailing mud. The market acceptance is low, so that the application of the product is limited and the large-scale popularization is difficult.
In addition, the tailings pond has huge costs for construction, maintenance, management, operation and the like. According to statistics, the cost of the metallurgy mine tailing pond per ton is 1-3 yuan, the cost of the production operation management per ton is 3-5 yuan, the cost is as high as billions yuan, and the mineral resources are exhausted day by day, so that the comprehensive utilization of the gold ore flotation tailing mud is urgently realized. How to comprehensively utilize a large amount of gold ore flotation tailing slurry with high efficiency and change waste into valuable becomes a technical problem in the field.
Disclosure of Invention
The invention aims to solve the defects of low mixing amount, low utilization rate, high energy consumption and the like of the existing gold ore flotation tailing mud utilization technology and incapability of consuming a large amount of tailing mud, and provides a processing technology for treating gold ore flotation tailing mud and producing raw materials for buildings by using the gold ore flotation tailing mud.
The system for treating the gold ore flotation tailing mud is realized by the following technical scheme:
a system for utilizing gold mine flotation tailing mud is characterized in that: comprises a stirring barrel 1, a clear water reservoir 2 is arranged at the input end of the stirring barrel 1, a preselection device is arranged at the output end of the stirring barrel 1, a tailing pond 6 and a concentrate pond 9 are arranged at the output end of the preselection device,
the output end of the concentrate tank 9 is provided with a shaking table 11, the discharge end of the shaking table 11 is communicated with a tailing tank 6, the product end produces mineral concentrate, the output end of the tailing tank 6 is provided with dewatering equipment, the discharge end of the dewatering equipment is provided with drying equipment, the water outlet end is communicated with a sewage tank 15, the discharge end of the drying equipment is provided with a magnetic separator, the water outlet end is communicated with the sewage tank 15, the discharge end of the magnetic separator is provided with screening equipment, the product end of the magnetic separator and the product end of the screening equipment are provided with the same storage bin 20, the stirring barrel 1, the shaking table 11 and the tailing tank 6 are all communicated with the sewage tank 15, the output end of the sewage tank 15 is provided with a settling tank 22, the water outlet end of the settling tank 22 is communicated with a clear water reservoir 2, and the;
a clean water pump 3 is arranged between the clean water reservoir 2 and the stirring barrel 1, a mortar pump 5 is arranged between the stirring barrel 1 and the primary separation spiral chute 4, a concentrate mortar pump 10 is arranged between the concentrate pond 9 and the shaking table 11, and a sewage pump 23 is arranged between the sewage pond 15 and the sedimentation tank 22;
preferably, the preselection device comprises a primary selection spiral chute 4, the output end of the primary selection spiral chute 4 is respectively provided with a tailing pond 6, a secondary selection spiral chute 7 and a fine selection spiral chute 8, the output end of the secondary selection spiral chute 7 is respectively provided with a primary selection spiral chute 4, a secondary selection spiral chute 7 and a fine selection spiral chute 8, the output end of the fine selection spiral chute 8 is respectively provided with a primary selection spiral chute 4, a secondary selection spiral chute 7 and a concentrate pond 9,
preferably, the diameters of the primary selection spiral chute, the intermediate selection spiral chute and the selection spiral chute are all 60cm-120cm or the diameters of the centrifugal gravity separators are all 31cm-320 cm; the shaking table has 80-160 grooves, length of 2-6 m and width of 1-2 m; preferably, the preselection device is a centrifugal gravity concentrator 28;
preferably, a bucket chain type lifter 12 is arranged between the tailing pond 6 and the dewatering equipment; the dehydration equipment is a high-frequency vibration dehydration screen 13 or a belt filter press 25;
preferably, a conveying belt 14 is installed between the dewatering device and the drying device, the drying device comprises an auger type dryer 16 and a drum type dryer 17, and the conveying belt 14 is installed between the auger type dryer 16 and the drum type dryer 17;
preferably, a bucket elevator 18 is arranged between the roller dryer 17 and the magnetic separator, the magnetic separator is a roller type multistage magnetic separator 19 or a belt type multistage magnetic separator 26, and the suction force is 3000-18000 GS;
preferably, the vibrating screen is a drum screen 21 or a plane high-frequency vibrating screen 27, and the sizes of screen holes are 30-120 meshes;
preferably, the storage bin 20 is provided with a non-magnetic dry sand bin 20-2 communicated with the vibrating screen and a black sand bin 20-1 with magnetism communicated with the magnetic separator;
preferably, a seawater desalination device 24 is installed between the settling tank 22 and the clean water reservoir 2.
The processing technology for producing the raw materials for the building by utilizing the gold ore flotation tailing mud is realized by the following technical scheme:
a processing technology for producing raw materials for buildings by utilizing gold ore flotation tailing slurry is characterized in that: the method comprises the following steps:
(a) and mortar blending: placing 20-50% of gold ore flotation tailing slurry generated by fresh water beneficiation and 50-80% of fresh water into a stirring barrel, and continuously stirring at the speed of 40-80 revolutions per minute to obtain uniformly dispersed tailing sand slurry;
discharging the overflowing muddy water into a sewage tank for centralized sedimentation treatment during stirring; .
(b) Preselecting: feeding the tailing mortar material prepared in the step (a) into a preselection device to select concentrate powder slurry containing metal, wherein the rest is tailing mortar material, conveying the tailing mortar material into a tailing pond, and discharging the overflowing sludge water into a sewage pond for centralized sedimentation treatment in the transportation process;
(c) and fine selection: pumping the concentrate powder slurry obtained in the step (b) to a shaking table by using concentrate mortar for concentration and concentration to obtain valuable metal-rich mineral concentrate powder; conveying the tailing slurry generated by concentration into a tailing pond, and discharging the muddy water overflowing in the transportation process into a sewage pond for centralized sedimentation treatment;
(d) dehydrating and drying: dehydrating the tailing slurry obtained in the step (b) and the step (c), drying until the water content of the building dry sand is 0.5-3%, cooling to below 60 ℃ for later use, and discharging sludge water generated in dehydration into a sewage pool for centralized precipitation treatment;
(e) and magnetic separation: separating magnetic sand and non-magnetic sand from the dry building sand obtained in the step (d);
(f) and grading and screening: grading and screening the nonmagnetic sand obtained in the step (e) to obtain final nonmagnetic sand of different grades;
(g) and precipitating: and (d) precipitating the muddy water generated in the steps (a) to (d) to obtain mud after precipitation, wherein the mud is used as a raw material of a light cement wallboard or other building materials, and clear water is returned to the reservoir to be used as water for mortar blending for recycling.
If gold ore flotation tailing slurry generated by seawater beneficiation is adopted in the step (a), fresh water obtained in the step (g) is diluted by a seawater desalination device to prepare mortar for recycling;
preferably, said step (b) preselects: feeding the tailing mortar blended in the step (a) into a centrifugal gravity concentrator, and selecting tailing mortar almost not containing valuable metals and concentrate powder slurry containing 50% of valuable metals;
preferably, the pre-selection in step (b) includes primary selection, intermediate selection and fine selection, and the primary selection comprises: feeding the tailing mortar prepared in the step (a) into a primary separation spiral chute, selecting tailing mortar almost containing no valuable metals, middling slurry containing 30% valuable metals and concentrate powder slurry containing 50% valuable metals, and conveying the obtained tailing mortar to a tailing pond;
the selection comprises the following steps: feeding the middling slurry subjected to primary separation into a middling spiral chute, selecting tailing slurry containing 20% of valuable metals, middling slurry containing 30% of valuable metals and concentrate powder slurry containing 50% of valuable metals, feeding the obtained tailing slurry into a primary separation spiral chute, and then carrying out primary separation until the tailing slurry almost contains no valuable metals, feeding the obtained middling slurry into a middling spiral chute, and then carrying out secondary separation until the obtained middling slurry is the same as the concentrate powder slurry;
the fine selection: feeding the concentrate powder slurry obtained in the primary separation and the intermediate separation into a fine separation spiral chute, selecting tailing slurry containing 20% of valuable metals, middling slurry containing 30% of valuable metals and concentrate powder slurry containing 50% of valuable metals, feeding the obtained tailing slurry into the primary separation spiral chute, and then carrying out primary separation until the tailing slurry almost contains no valuable metals, feeding the obtained middling slurry into the intermediate separation spiral chute, and then carrying out intermediate separation until the obtained middling slurry is the same as the concentrate powder slurry;
preferably, the shaking table used in the step (c) is a shaking table with 80-160 grooves, the length is 2-6 meters, the width is 1-2 meters, the shaking table is shaken for 100 times per minute and 120 times, and the minerals in the concentrate powder slurry are separated by vibration by utilizing the buoyancy of water, so as to obtain concentrated mineral concentrate powder;
preferably, in the step (d), dewatering and drying, firstly, the tailing slurry is conveyed to a high-frequency vibration dewatering screen or a belt filter press through a bucket chain type lifter, the dewatering rate is 20-25% or 10-15%, the dewatered material is conveyed to an auger type dryer through a conveying belt, the dewatered wet material is continuously stirred and is fully contacted with a rotating blade with heat above 120 ℃ and a pipe wall, the water content of the material is reduced to 3-10%, then the material is conveyed to a dryer through the conveying belt, the material is continuously rolled in a roller and is fully contacted with 950 ℃ heat generated after combustion of natural gas, LNG gas, coal or biomass fuel to volatilize water, and the material is dried to the building dry sand with the water content of 0.5-3%;
preferably, the magnetic separation in the step (e) adopts a roller dry type multistage magnetic separator or a belt dry type multistage magnetic separator, the suction force is 3000-18000 GS, magnetic separation is carried out for 1-5 times to separate magnetic sand and non-magnetic sand from the building dry sand,
preferably, a rotary screen 21 or a plane high-frequency vibrating screen 27 is adopted in the step (f) of classifying screening, and the sizes of screen holes are all 30-120 meshes;
preferably, the step (g) of precipitating is discharging the muddy water into a precipitation tank for precipitation.
The invention designs a set of system for treating gold ore flotation tailing slurry, solid waste can be effectively developed and utilized by processing the gold ore flotation tailing slurry through the system, mineral concentrate powder containing valuable metals such as gold, silver, copper, lead and the like, magnetic sand, sand for building dry powder mortar, namely nonmagnetic sand, raw materials of light cement wallboards, namely slurry and clear water are obtained by performing mortar blending, preselection, concentration, dehydration, drying, magnetic separation, grading screening, precipitation and the like on the gold ore flotation tailing slurry, the comprehensive utilization of gold ore flotation tailing slurry is realized by one hundred percent, the whole production process has no waste gas and waste residue discharge, water is recycled in a closed circuit, the effects of clean production, energy conservation and emission reduction are achieved, the requirements of national industrial policies and safety and environmental protection are met, the safety and environmental protection problems of stacking the gold ore flotation tailing slurry are solved, and the ecological environment is maintained and improved, the development of the circular economy industry and the promotion of the sustainable development of the mine have great significance.
The method can utilize gold mine tailing mud by one hundred percent and obtain better economic benefit, wherein the obtained ore fines account for 3-10 percent of the total amount of the tailing mud, equipment investment is only 1000 yuan for averagely treating 1 ton of tailing mud, and the average treatment cost per ton is less than 3 yuan; the obtained building sand, namely the non-magnetic sand accounts for 80-90% of the total amount of the tailing mud, and the average drying cost per ton is less than 30 yuan; the mud is used as a raw material of a light cement wallboard or other building materials and accounts for 5-15% of the total amount of the tailing mud.
Drawings
FIG. 1: the schematic structure from the stirring barrel to the shaking table in example 1;
FIG. 2: schematic structure of effluent water sump to product in examples 1 and 2;
FIG. 3: the process flow diagram of example 1;
FIG. 4: the structure of the system in the embodiment 1 is shown;
FIG. 5: the process flow diagram of example 2;
in the figure: 1. The device comprises a stirring barrel, 2, a clear water reservoir, 4, a primary selection spiral chute, 5, a mortar pump, 6, a tailing pond, 7, a secondary selection spiral chute, 8, a fine selection spiral chute, 9, a concentrate pond, 10, a concentrate mortar pump, 11, a shaking table, 12, a bucket chain type lifter, 13, a high-frequency vibration dewatering screen, 14, a conveying belt, 15, a sewage pond, 16, a auger type dryer, 17, a roller type dryer, 18, a bucket type lifter, 19, a roller type dry multistage magnetic separator, 20, a storage bin, 20-1, a magnetic black sand bin, 20-2, a non-magnetic dry sand bin, 21, a roller screen, 22, a settling tank, 23, a sewage pump, 24, a seawater desalination device, 25, a belt type filter press, 26, a belt type dry multistage magnetic separator, 27, a plane high-frequency vibration screen, 28 and a centrifugal gravity separator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1. A system for utilizing gold ore flotation tailing mud comprises a stirring barrel 1, wherein an input end of the stirring barrel 1 is provided with a clear water reservoir 2, a clear water pump 3 is arranged on the outer side of the clear water reservoir 2, the clear water pump 3 pumps water of the clear water reservoir 2 into the stirring barrel 1, a primary selection spiral chute 4 is installed at an output end of the stirring barrel 1, a mortar pump 5 is arranged on the outer side of the stirring barrel 1, prepared mortar is pumped into the primary selection spiral chute 4 by the mortar pump 5, an output end of the primary selection spiral chute 4 is respectively provided with a tailing pond 6, a secondary selection spiral chute 7 and a refined selection spiral chute 8, an output end of the refined selection spiral chute 7 is respectively provided with the primary selection spiral chute 4, the refined selection spiral chute 7 and the refined selection spiral chute 8, an output end of the refined selection spiral chute 8 is respectively provided with the primary selection spiral chute 4, the refined selection spiral chute 7 and a concentrate pond 9, the outer side of the concentrate pond 9 is provided, the output of concentrate mortar pump 10 is equipped with shaking table 11, and concentrate mortar pump 10 is gone into shaking table 11 with the concentrate mortar pump, the discharge end of shaking table 11 communicates with each other with tailing pond 6, and the product end of shaking table 11 is output fine ore powder, bucket chain formula lifting machine 12 is installed to the output in tailing pond 6, and high-frequency vibration dewatering screen 13 is installed to the other end of bucket chain formula lifting machine 12, conveyer belt 14 is installed to the discharge end of high-frequency vibration dewatering screen 13, and the water outlet end communicates with effluent water sump 15, and auger formula drying machine 16 is installed to the other end of conveyer belt 14, conveyer belt 14 is installed to the discharge end of auger formula drying machine 16, and the water outlet end communicates with effluent water sump 15, and drum-type drying machine 17 is installed to the other end of conveyer belt 14, and bucket elevator 18 is installed to the discharge end of drum-type drying machine 17, and multistage magnetic separator 19, the product end of the drum-type multistage magnetic separator 19 is provided with a magnetic black sand bin 20-1 of a storage bin 20; a rotary screen 21 is installed at the discharge end of the drum-type multistage magnetic separator 19, a non-magnetic dry sand bin 20-2 of a storage bin 20 is installed at the discharge end of the rotary screen 21, the stirring barrel 1, the shaking table 11 and the tailing pond 5 are all communicated with a sewage pond 15, a settling tank 22 is arranged at the output end of the sewage pond 15, a sewage pump 23 is arranged on the outer side of the sewage pond 15 and pumps sewage into the settling tank 22, the water outlet end of the settling tank 22 is communicated with a clear water reservoir 2, and slurry is output at the discharge end;
the diameters of the primary spiral chute, the secondary spiral chute and the fine spiral chute are 60cm-120 cm;
the shaking table adopts 80-160 grooves, the length is 2-6 meters, and the width is 1-2 meters;
the suction force of the drum-type multistage magnetic separator is 3000-18000 GS;
the screen hole size of the drum screen is 30-120 meshes.
A processing technology for producing raw materials for buildings by utilizing gold ore flotation tailing slurry comprises the following steps:
(a) and mortar blending: placing 20-50% of gold ore flotation tailing slurry generated by fresh water beneficiation and 50-80% of fresh water into a stirring barrel, continuously stirring at the speed of 40-80 revolutions per minute, and obtaining tailing sand slurry which is uniformly dispersed without flocculation;
the overflowing muddy water is discharged into a sewage pool for centralized sedimentation treatment during stirring, and the muddy water is recycled;
(b) preselecting: the method comprises the steps of primary selection, intermediate selection and fine selection, wherein the primary selection comprises the following steps: feeding the tailing mortar material prepared in the step (a) into a primary separation spiral chute, selecting tailing mortar material almost containing no valuable metal, middling slurry containing 30% valuable metal and concentrate powder slurry containing 50% valuable metal, conveying the obtained tailing mortar material into a tailing pond, and discharging muddy water overflowing in the transportation process into a sewage pond for centralized precipitation treatment and recycling;
the selection comprises the following steps: feeding the middling slurry subjected to primary separation into a middling spiral chute, selecting tailing slurry containing 20% of valuable metals, middling slurry containing 30% of valuable metals and concentrate powder slurry containing 50% of valuable metals, feeding the obtained tailing slurry into a primary separation spiral chute, and then carrying out primary separation until the tailing slurry almost contains no valuable metals, feeding the obtained middling slurry into a middling spiral chute, and then carrying out secondary separation until the obtained middling slurry is the same as the concentrate powder slurry;
the fine selection: feeding the concentrate powder slurry obtained in the primary separation and the intermediate separation into a fine separation spiral chute, selecting tailing slurry containing 20% of valuable metals, middling slurry containing 30% of valuable metals and concentrate powder slurry containing 50% of valuable metals, feeding the obtained tailing slurry into the primary separation spiral chute, and then carrying out primary separation until the tailing slurry almost contains no valuable metals, feeding the obtained middling slurry into the intermediate separation spiral chute, and then carrying out intermediate separation until the obtained middling slurry is the same as the concentrate powder slurry;
(c) and fine selection: pumping the concentrate powder slurry obtained in the step (b) to a shaking table by using concentrate mortar for concentration and concentration, wherein the shaking table adopts 80-160 grooves, the length is 2-6 meters, the width is 1-2 meters, shaking is carried out for 100 times per minute, and light and heavy minerals in the concentrate powder slurry are separated by vibration by using the buoyancy of water to obtain valuable metal-rich mineral concentrate powder;
returning the tailings to the step (b) for screening, and repeating the steps in a reciprocating way and repeating the steps in a circulating way to extract valuable metals; conveying the tailing mortar material generated by concentration to a tailing pond, and discharging muddy water overflowing in the transportation process into a sewage pond for centralized sedimentation treatment and recycling;
(d) dehydrating and drying: conveying the tail mortar obtained in the step (b) and the step (c) to a high-frequency vibration dewatering screen through a bucket chain type lifter, wherein the dewatering rate is 20-25%, the dewatered material is conveyed to an auger type dryer through a conveying belt, the dewatered wet material is continuously stirred to be fully contacted with a rotating blade with heat above 120 ℃ and a pipe wall, the water content of the material is reduced to 3-10%, then the material is conveyed to a roller type dryer through the conveying belt, the material is continuously rolled in a roller, the material is fully contacted with heat of 950 ℃ with 450-class heat generated after combustion of natural gas, LNG gas, coal or biomass fuel to volatilize water, the material is dried to building dry sand with the water content of 0.5-3%, the building dry sand is cooled to below 60 ℃ for standby, and muddy water generated in dewatering and drying is discharged into a sewage pool for centralized precipitation treatment and is recycled;
(e) and magnetic separation: transporting the building dry sand obtained in the step (d) to a drum-type multistage magnetic separator through a bucket elevator, wherein the suction force of the drum-type multistage magnetic separator is 3000-18000 GS, separating the building dry sand into magnetic sand and non-magnetic sand through 1-5 times of magnetic separation, and placing the magnetic sand into a magnetic black sand bin of a storage bin;
(f) and grading and screening: conveying the nonmagnetic sand obtained in the step (e) to a drum screen for grading screening, wherein the size of a screen hole is 30-120 meshes, obtaining the final nonmagnetic sand with different grades, and putting the nonmagnetic sand into a nonmagnetic dry sand bin of a storage bin;
(g) and precipitating: and (d) precipitating the muddy water generated in the steps (a) to (d) to obtain mud after precipitation, wherein the mud is used as a raw material of a light cement wallboard or other building materials, and clear water is returned to the reservoir to be used as water for mortar blending for recycling.
Example 2. A system for utilizing gold mine to float tailing mud comprises a stirring barrel 1, wherein an input end of the stirring barrel 1 is provided with a clean water reservoir 2, a clean water pump 3 is arranged on the outer side of the clean water reservoir 2, the clean water pump 3 pumps the clean water reservoir 2 into the stirring barrel 1, an output end of the stirring barrel 1 is provided with a centrifugal gravity separator 28, an output end of the centrifugal gravity separator 28 is provided with a tailing pond 6 and a concentrate pond 9, the outer side of the concentrate pond 9 is provided with a concentrate mortar pump 10, an output end of the concentrate mortar pump 10 is provided with a shaking table 11, the concentrate mortar pump 10 pumps the concentrate mortar into the shaking table 11, a discharge end of the shaking table 11 is communicated with the tailing pond 5, a product end of the shaking table 11 produces mineral concentrate, an output end of the tailing pond 6 is provided with a bucket chain type elevator 12, the other end of the bucket chain type elevator 12 is provided with a belt type filter press 25, a discharge end of, the water outlet end is communicated with the sewage tank 15, the other end of the conveying belt 14 is provided with an auger type dryer 16, the discharge end of the auger type dryer 16 is provided with the conveying belt 14, the water outlet end is communicated with the sewage tank 15, the other end of the conveying belt 14 is provided with a roller type dryer 17, the discharge end of the roller type dryer 17 is provided with a bucket elevator 18, the other end of the bucket elevator 18 is provided with a belt type multistage magnetic separator 26, and the product end of the belt type multistage magnetic separator 26 is provided with a magnetic black sand bin 20-1 of a storage bin 20; a plane high-frequency vibrating screen 27 is installed at the discharge end of the belt type multistage magnetic separator 26, a non-magnetic dry sand bin 20-2 of a storage bin 20 is installed at the discharge end of the plane high-frequency vibrating screen 27, the stirring barrel 1, the shaking table 11 and the tailing pond 5 are all communicated with a sewage pond 15, a settling tank 22 is arranged at the output end of the sewage pond 15, a sewage pump 23 is arranged on the outer side of the sewage pond 15, the sewage pump pumps sewage into the settling tank 22, the discharge end of the settling tank 22 outputs slurry, a seawater desalination device 24 is installed between the water outlet end and the clear water reservoir 2, and the seawater desalination device 24 desalinates seawater and discharges the seawater into the clear water reservoir 2;
the diameters of the primary spiral chute, the secondary spiral chute and the fine spiral chute are 60cm-120 cm;
the shaking table adopts 80-160 grooves, the length is 2-6 meters, and the width is 1-2 meters;
the suction force of the belt type multistage magnetic separator is 3000-18000 GS;
the mesh size of the plane high-frequency vibrating screen is 30-120 meshes.
A processing technology for producing raw materials for buildings by utilizing gold ore flotation tailing slurry comprises the following steps:
(a) and mortar blending: putting 20-50% of gold ore flotation tailing slurry generated by seawater beneficiation and 50-80% of fresh water into a stirring barrel, continuously stirring at the speed of 40-80 revolutions per minute, and obtaining tailing sand slurry which is uniformly dispersed without flocculation;
the overflowing muddy water is discharged into a sewage pool for centralized sedimentation treatment during stirring, and the muddy water is recycled;
(b) preselecting: feeding the tailing mortar blended in the step (a) into a centrifugal gravity concentrator, selecting tailing mortar almost containing no valuable metals and concentrate powder slurry containing 50% of valuable metals, conveying the obtained tailing mortar into a tailing pond, and discharging muddy water overflowing in the transportation process into a sewage pond for centralized precipitation treatment and recycling;
(c) and fine selection: pumping the concentrate powder slurry obtained in the step (b) to a shaking table by using concentrate mortar for concentration and concentration, wherein the shaking table adopts 80-160 grooves, the length is 2-6 meters, the width is 1-2 meters, shaking is carried out for 100 times per minute, and light and heavy minerals in the concentrate powder slurry are separated by vibration by using the buoyancy of water to obtain valuable metal-rich mineral concentrate powder;
returning the tailings to the step (b) for screening, and repeating the steps in a reciprocating way and repeating the steps in a circulating way to extract valuable metals; conveying the tailing mortar material generated by concentration to a tailing pond, and discharging muddy water overflowing in the transportation process into a sewage pond for centralized sedimentation treatment and recycling;
(d) dehydrating and drying: conveying the tail mortar obtained in the steps (b) and (c) to a belt filter press through a bucket chain type lifter until the dehydration rate reaches 10-15% of water content, conveying the dehydrated material to an auger type dryer through a conveying belt, drying until the water content reaches 3-10%, continuously stirring the dehydrated wet material to fully contact with a rotating blade with heat above 120 ℃ and a pipe wall so as to reduce the water content of the material to 3-10%, then conveying the material to a roller type dryer through the conveying belt, continuously rolling the material in a roller, fully contacting with 950 ℃ heat generated after combustion of natural gas, LNG gas, coal or biomass fuel to volatilize water, drying the material to 0.5-3% of water content of dry building sand, cooling to below 60 ℃ for later use, discharging muddy water generated in dehydration and drying into a sewage pool for centralized precipitation treatment, recycling;
(e) and magnetic separation: transporting the building dry sand obtained in the step (d) to a drum-type multistage magnetic separator and a belt-type multistage magnetic separator through a bucket elevator, separating magnetic sand and non-magnetic sand from the building dry sand through 1-5 times of magnetic separation, and placing the magnetic sand into a magnetic black sand bin of a storage bin;
(f) and grading and screening: conveying the nonmagnetic sand obtained in the step (e) to a plane high-frequency vibrating screen for grading screening, wherein the size of a screen hole is 30-120 meshes, obtaining the final nonmagnetic sand with different grades, and putting the nonmagnetic sand into a nonmagnetic dry sand bin of a storage bin;
(g) and precipitating: and (d) precipitating the muddy water generated in the steps (a) to (d) to obtain mud, wherein the mud is used as a raw material of a light cement wallboard or other building materials, and the clear water is desalted into fresh water by a seawater desalting device and then is discharged into a reservoir to be used as water for mortar blending for recycling.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. A system for utilizing gold mine flotation tailing mud is characterized in that: comprises a stirring barrel (1), wherein a clear water reservoir (2) is arranged at the input end of the stirring barrel (1), a preselection device is arranged at the output end of the stirring barrel (1), a tailing pond (6) and a concentrate pond (9) are arranged at the output end of the preselection device,
the output end of the concentrate tank (9) is provided with a shaking table (11), the discharge end of the shaking table (11) is communicated with the tailing tank (6), the product end produces mineral concentrate powder, the output end of the tailing pond (6) is provided with dewatering equipment, the discharge end of the dewatering equipment is provided with drying equipment, the water outlet end is communicated with a sewage pond (15), the discharge end of the drying device is provided with a magnetic separator, the water outlet end is communicated with a sewage tank (15), the discharge end of the magnetic separator is provided with screening equipment, the product end of the magnetic separator and the product end of the screening equipment are provided with the same storage bin (20), the stirring barrel (1), the shaking table (11) and the tailing pond (6) are communicated with a sewage pond (15), the output end of the sewage pool (15) is provided with a settling tank (22), the water outlet end of the settling tank (22) is communicated with the clear water reservoir (2), and the product end outputs slurry.
2. The system for flotation of tailings mud from gold ore according to claim 1, wherein: be equipped with clean water pump (3) between clear water cistern (2) and agitator (1), be equipped with mortar pump (5) between agitator (1) and primary election spiral chute (4), be equipped with concentrate mortar pump (10) between concentrate pond (9) and shaking table (11), be equipped with sewage pump (23) between sewage pond (15) and gunbarrel (22).
3. The system for flotation of tailings mud from gold ore according to claim 2, wherein: a seawater desalination device (24) is arranged between the settling tank (22) and the clear water reservoir (2).
4. A system for flotation of tailings mud from gold mine according to claim 3, wherein: a bucket chain type lifter (12) is arranged between the tailing pond (6) and the dewatering equipment; the dewatering equipment is a high-frequency vibration dewatering screen (13) or a belt filter press (25);
a conveying belt (14) is installed between the dewatering equipment and the drying equipment, the drying equipment comprises an auger type dryer (16) and a drum type dryer (17), and the conveying belt (14) is installed between the auger type dryer (16) and the drum type dryer (17).
5. The system for flotation of tailings mud from gold ore according to claim 4, wherein: the preselecting device is a centrifugal gravity concentrator (28), and the diameters of the centrifugal gravity concentrators are all 31cm-320 cm.
6. The system for flotation of tailings mud from gold ore according to claim 4, wherein: the preselection device comprises a primary selection spiral chute (4), the output end of the primary selection spiral chute (4) is respectively provided with a tailing pond (6), a medium selection spiral chute (7) and a fine selection spiral chute (8), the output end of the medium selection spiral chute (7) is respectively provided with the primary selection spiral chute (4), the medium selection spiral chute (7) and the fine selection spiral chute (8), the output end of the fine selection spiral chute (8) is respectively provided with the primary selection spiral chute (4), the medium selection spiral chute (7) and a concentrate pond (9),
the diameters of the primary selection spiral chute, the intermediate selection spiral chute and the selection spiral chute are all 60cm-120cm or the diameters of the centrifugal gravity separators are all 31cm-320 cm; the shaking table is 80-160 grooves with length of 2-6 m and width of 1-2 m.
7. A system for flotation of tailings slurry from gold ore according to claim 5 or 6, wherein: a bucket elevator (18) is arranged between the roller type dryer (17) and the magnetic separator, the magnetic separator is a roller dry type multi-stage magnetic separator (19) or a belt dry type multi-stage magnetic separator (26), and the suction force is 3000-18000 GS;
the vibrating screen is a drum screen (21) or a plane high-frequency vibrating screen (27), and the sizes of screen holes are all 30-120 meshes;
the storage bin (20) is provided with a non-magnetic dry sand bin (20-2) communicated with the vibrating screen and a magnetic black sand bin (20-1) communicated with the magnetic separator.
8. A process for producing construction raw material using the system of claims 1-7, characterized in that: the method comprises the following steps:
(a) and mortar blending: placing 20-50% of gold ore flotation tailing slurry generated by fresh water beneficiation and 50-80% of fresh water into a stirring barrel, and continuously stirring at the speed of 40-80 revolutions per minute to obtain uniformly dispersed tailing sand slurry;
discharging the overflowing muddy water into a sewage tank for centralized sedimentation treatment during stirring;
(b) preselecting: feeding the tailing slurry prepared in the step (a) into a preselection device to select concentrate powder slurry containing valuable metals, wherein the remainder is the tailing slurry, conveying the tailing slurry into a tailing pond, and discharging the muddy water overflowing in the transportation process into a sewage pond for centralized sedimentation treatment;
(c) and fine selection: pumping the concentrate powder slurry obtained in the step (b) to a shaking table by using concentrate mortar for concentration and concentration to obtain valuable metal-rich mineral concentrate powder; conveying the tailing mortar material generated by concentration to a tailing pond, and discharging muddy water overflowing in the conveying process into a sewage pond for centralized sedimentation treatment;
(d) dehydrating and drying: dehydrating the tailing slurry obtained in the step (b) and the step (c), drying until the water content of the building dry sand is 0.5-3%, cooling to below 60 ℃ for later use, and discharging sludge water generated in dehydration into a sewage pool for centralized precipitation treatment;
(e) and magnetic separation: separating magnetic sand and non-magnetic sand from the dry building sand obtained in the step (d);
(f) and grading and screening: grading and screening the nonmagnetic sand obtained in the step (e) to obtain final nonmagnetic sand of different grades;
(g) and precipitating: and (d) precipitating the muddy water generated in the steps (a) to (d) to obtain mud after precipitation, wherein the mud is used as a raw material of a light cement wallboard or other building materials, and clear water is returned to the reservoir to be used as water for mortar blending for recycling.
9. The process for producing raw materials for construction using gold ore flotation tailing slurry according to claim 8, wherein: gold ore flotation tailing slurry generated by seawater beneficiation is adopted in the step (a), and clear water obtained in the step (g) is desalted into fresh water through a seawater desalting device to prepare mortar for recycling;
the step (b) preselecting: feeding the tailing mortar blended in the step (a) into a centrifugal gravity concentrator, and selecting tailing mortar almost not containing valuable metals and concentrate powder slurry containing 50% of valuable metals;
the shaking table adopted in the step (c) for concentration is 80-160 grooves, the length is 2-6 meters, the width is 1-2 meters, the shaking table is shaken for 100 times per minute and 120 times, and the minerals in the concentrate powder slurry are separated by vibration by utilizing the buoyancy of water to obtain concentrated ore concentrate powder;
the step (d) of dehydrating and drying, wherein firstly, the tailing slurry is conveyed to a high-frequency vibration dehydrating screen or a belt filter press through a bucket chain type lifter, the dehydrating rate is 20-25% or 10-15%, the dehydrated material is conveyed to an auger type dryer through a conveying belt, the dehydrated wet material is continuously stirred to be fully contacted with a rotating blade with heat above 120 ℃ and a pipe wall, the water content of the material is reduced to 3-10%, then the material is conveyed to a drum type dryer through the conveying belt, the material is continuously rolled in a drum and is fully contacted with 950 ℃ heat generated after the combustion of natural gas, LNG gas, coal or biomass fuel to volatilize water, and the material is dried to the building dry sand with the water content of 0.5-3%;
in the step (e), a drum-type multistage magnetic separator or a belt-type multistage magnetic separator is adopted for magnetic separation, the suction force is 3000-18000 GS, magnetic separation and non-magnetic separation are carried out on the dry building sand for 1-5 times,
a rotary screen 21 or a plane high-frequency vibrating screen 27 is adopted in the step (f) of classifying and screening, and the sizes of screen holes are all 30-120 meshes;
and (g) the precipitation in the step (g) is to discharge the muddy water into a precipitation tank for precipitation.
10. The process for producing raw materials for construction using gold ore flotation tailing slurry according to claim 8, wherein:
the preselection in the step (b) comprises primary selection, intermediate selection and fine selection, wherein the primary selection comprises the following steps: feeding the tailing mortar prepared in the step (a) into a primary separation spiral chute, selecting tailing mortar almost containing no valuable metals, middling slurry containing 30% valuable metals and concentrate powder slurry containing 50% valuable metals, and conveying the obtained tailing mortar to a tailing pond;
the selection comprises the following steps: feeding the middling slurry subjected to primary separation into a middling spiral chute, selecting tailing slurry containing 20% of valuable metals, middling slurry containing 30% of valuable metals and concentrate powder slurry containing 50% of valuable metals, feeding the obtained tailing slurry into a primary separation spiral chute, and then carrying out primary separation until the tailing slurry almost contains no valuable metals, feeding the obtained middling slurry into a middling spiral chute, and then carrying out secondary separation until the obtained middling slurry is the same as the concentrate powder slurry;
the fine selection: feeding the concentrate powder slurry obtained in the primary separation and the intermediate separation into a fine separation spiral chute, selecting tailing slurry containing 20% of valuable metals, middling slurry containing 30% of valuable metals and concentrate powder slurry containing 50% of valuable metals, feeding the obtained tailing slurry into the primary separation spiral chute, and then carrying out primary separation until the tailing slurry almost contains no valuable metals, feeding the obtained middling slurry into the intermediate separation spiral chute, and then carrying out intermediate separation until the obtained middling slurry is the same as the concentrate powder slurry;
the shaking table adopted in the step (c) for concentration is 80-160 grooves, the length is 2-6 meters, the width is 1-2 meters, the shaking table is shaken for 100 times per minute and 120 times, and the minerals in the concentrate powder slurry are separated by vibration by utilizing the buoyancy of water to obtain concentrated ore concentrate powder;
the step (d) of dehydrating and drying, wherein firstly, the tailing slurry is conveyed to a high-frequency vibration dehydrating screen or a belt filter press through a bucket chain type lifter, the dehydrating rate is 20-25% or 10-15%, the dehydrated material is conveyed to an auger type dryer through a conveying belt, the dehydrated wet material is continuously stirred to be fully contacted with a rotating blade with heat above 120 ℃ and a pipe wall, the water content of the material is reduced to 3-10%, then the material is conveyed to a drum type dryer through the conveying belt, the material is continuously rolled in a drum and is fully contacted with 950 ℃ heat generated after the combustion of natural gas, LNG gas, coal or biomass fuel to volatilize water, and the material is dried to the building dry sand with the water content of 0.5-3%;
in the step (e), a drum-type multistage magnetic separator or a belt-type multistage magnetic separator is adopted for magnetic separation, the suction force is 3000-18000 GS, magnetic separation and non-magnetic separation are carried out on the dry building sand for 1-5 times,
a rotary screen 21 or a plane high-frequency vibrating screen 27 is adopted in the step (f) of classifying and screening, and the sizes of screen holes are all 30-120 meshes;
and (g) the precipitation in the step (g) is to discharge the muddy water into a precipitation tank for precipitation.
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