CN103754830A - Process and method for recovering valuable elements of tailing and comprehensively utilizing tailing - Google Patents
Process and method for recovering valuable elements of tailing and comprehensively utilizing tailing Download PDFInfo
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- CN103754830A CN103754830A CN201410021884.9A CN201410021884A CN103754830A CN 103754830 A CN103754830 A CN 103754830A CN 201410021884 A CN201410021884 A CN 201410021884A CN 103754830 A CN103754830 A CN 103754830A
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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
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Abstract
The invention provides a process and method for recovering valuable elements of tailing and comprehensively utilizing tailing, relates to the technical field of comprehensive development and utilization of tailing, particularly relates to a process method for recovering valuable elements of tailing, and also relates to a process method for comprehensively utilizing tailing. The process method for recovering valuable elements of tailing comprises the steps of raw material storage, ore grinding, ore dressing, dewatering operation and the like. The process method for comprehensively utilizing tailing comprises the steps of raw material processing, mixture preparation, green brick molding, autoclave curing and the like. The process method for recovering valuable elements of tailing is characterized by grinding ores into fine ore slurry in a closed-loop ore grinding and grading manner, and performing ore dressing through floatation to pick out sulfur ore concentrate, wherein most of sulfur ores in the ores can be picked out. The process method for comprehensively utilizing tailing is characterized by preparing blanks by mixing and stirring tailing slag, fly ash, lime gypsum powder and the like, pressing into green bricks, performing autoclave curing, and preparing tailing bricks. Thus, the waste tailing is fully utilized, thereby achieving the purpose of environment protection.
Description
Technical field
[0001]the present invention relates to tailings comprehensive evaluation and exploration technology field, particularly relate to a kind of mine tailing valuable element recovery process method, also relate to comprehensive utilization of tailing processing method.
Background technology
At present, produce a large amount of mine tailings after mining, except small part mine tailing is utilized, the mine tailing of quite large quantity all only has storage, for this reason, has taken a large amount of soils.And along with the continuous increase of mine tailing quantity, shared land quantity will continue to increase.Zhe Dui China such one have a large population, impact that country that per capita area of cultivated farmland is few causes is long-range.It is many-sided that mill tailings directly causes environmental pollution performance: one, and raw ore directly carries the pollution substance that exceeds standard, as radioelement and other unwanted components; Its two, the chemical agent using in ore dressing process remain in mine tailing and with some component reaction wherein, produce new source of pollution; Its three, the hypergenes such as under earth's surface stacking condition, mine tailing is oxidized, hydrolysis and weathering change, making free of contamination constitutional changes is originally pollution components, some heavy sulfide as ubiquitous in nonferrous metal mine; Its four, the mine tailing of flowing through is stacked the surface water in place, by interacting with mine tailing, dissolves some unwanted component and carries transfer, causes large-scale pollution; Its five, because Mine Tailings particle is superfine, the mine tailing of discharge is dry to be carried very easily airborne dust by wind-force and pollutes; How, by these mine tailings comprehensive development and utilization in addition, turning waste into wealth, is the current key subjects that solve of needing.
Summary of the invention
[0003] the object of the invention is to solve the deficiency that prior art exists, first a kind of mine tailing valuable element recovery process method is provided, comprehensive utilization of tailing processing method is also provided.
A mine tailing valuable element recovery process method, comprises the following steps:
1) raw material storage: raw ore enters after factory, enters fine ore bin, as the raw material of grinding operation;
2) ore grinding: adopt closed circuit grinding classification form, ore is sent into ball mill, carry out wet ball grinding, form ore pulp, ore pulp, through grading machine, is delivered to next step ore-dressing practice by the ore slurry that grinding rate is qualified, and underproof Coarse Aggregate turns back to ball mill and further regrinds;
3) ore dressing: the ore pulp of milled, after agitation vat is sized mixing and stirred evenly, enters flotation operation, output sulphur concentrate;
4) dewatering operation: the sulphur concentrate of selecting through flotation operation is transported to concentrate pond and carries out mechanical dehydration, moisture carries out export trade or further processing after 10%;
5) ore pulp of discharging is called mine tailing, passes through equally processed, for follow-up brick-making raw material.
Wherein, in step 3) flotation operation, limonite adopts reverse floatation process, and sulfurous iron ore adopts direct floatation process.
The comprehensive utilization of tailing processing method of utilizing claim 1 to discharge, comprises the following steps:
1) raw material disposal: it is stand-by that flyash, tail slag are sent into respectively batch bin storage, lime, gypsum are through fragmentation, grinding, mixing, and formation lime stone-gypsum powder is sent in feed bin and is stored for future use;
2) compound preparation: the flyash measuring, lime stone-gypsum powder, tail slag, water, send into stirrer strong stirring, the compound of making is sent in successive slaking silo, and the compound having digested is sent into wheel roller and is further ground experienced, makes blank;
3) green brick forming: blank is sent in press hopper, be made as adobe through extrusion forming, scrap body material is sent back in wheel roller again to grind to practice and mixed, as blank:
4) steam press maintenance: adobe is sent into steam press maintenance in autoclave, and the product that autoclave curing is good is pulled out still, delivers to stockyard and stacks, and makes tailing-bricks.
A kind of mine tailing valuable element recovery process method of the present invention, wears into thin ore pulp by closed circuit grinding classification form by ore, then by flotation beneficiation, selects sulphur concentrate, the most of sulphur ore deposit in ore can be selected.Particularly, in flotation operation, limonite adopts reverse floatation process, and sulfurous iron ore adopts direct floatation process, is more conducive to improve the elimination factor of sulphur.Comprehensive utilization of tailing processing method of the present invention; by by mix and blends such as mine tailings, flyash, lime stone-gypsum powder; make blank, then be pressed into adobe, pass through steam press maintenance; make tailing-bricks; can make full use of discarded mine tailing, reach tailings comprehensive and develop, turn waste into wealth; reduce the pollution to water and environment such as pollution substance, chemical agent, heavy sulfide that exceeds standard, reach the object of protection of the environment.
Accompanying drawing explanation:
Fig. 1 is mine tailing valuable element recovery process schema;
Fig. 2 is comprehensive utilization of tailing process flow sheet.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described:
Embodiment 1: mine tailing valuable element recovery process flow process
As shown in Figure 1: original debris enters fine ore bin by vehicle transport 1, as the raw material of grinding operation.Then enter grinding section, this section adopts closed circuit grinding classification form, ore in ore storage bin, under the even swing of oscillating feeder, is sent ore 2 into ball mill by scoop feeder, carries out wet ball grinding, ore ceaselessly hits mutually, grinds with steel ball in ball mill barrel, then discharge outside ball mill, form ore pulp 3, ore pulp 3 is through grading machine, the ore slurry 4 that grinding rate is qualified is delivered to next step operation, and underproof Coarse Aggregate turns back to ball mill and further regrinds.Then carry out ore-dressing practice, the ore slurry 4 of milled is sized mixing and is stirred evenly after slurrying through agitation vat, forms slurry 5 to be selected, enters flotation operation, and limonite adopts reverse floatation process, and sulfurous iron ore adopts direct floatation process, and output sulphur concentrate 6 respectively, obtain the valuable elements such as copper zinc.Carry out dewatering operation: mechanical dehydration is carried out in the concentrate pond that the sulphur concentrate 6 of selecting through flotation operation is transported to, moisture carries out export trade or further processing after 10%.The ore pulp 7 of discharging is called secondary mine tailing, passes through equally processed, for follow-up comprehensive utilization brickmaking.
Embodiment 2: mine tailing valuable element recovery process flow process
As shown in Figure 2:
1, raw material disposal:
(1) flyash
With flyash, be dry ash discharge, by flyash deliver in factory, in steel flyash silo, store stand-by.
(2) gypsum, unslaked lime
Lump lime, gypsum are transported in factory, leave in combine heap canopy in, lump lime, gypsum are sent in jaw crusher, after fragmentation through metering, in feeding ball mill, grinding to regulation fineness is made lime stone-gypsum powder 8, delivers in lime stone-gypsum filler bin and stores for future use.
(3) mine tailings
Mine tailings are secondary mine tailings after extraction valuable element, mine tailings are put into hopper, in endless belt conveyor, lift are sent mine tailings batch bin to.
2, compound preparation:
Compound preparation system comprises batching and stirring system.
(1) system forms
Batching stirring system is comprised of raw material and water charging equipment, electronic-weighing measuring apparatus, stirrer, computer batching and Controlling System etc.
Flyash charging equipment adopts two tube-type spiral conveyers simultaneously to two flyash weigher feed; Mine tailings charging equipment adopts a flat pattern carrying roller belt feeder to weigher feed;
Desulfurated plaster charging equipment adopts a flat pattern carrying roller belt feeder to slag weigher feed;
Above water weigher, Pneumatic butterfly valve is installed on feedwater piping, after butterfly valve is opened, can in water weigher, intake;
Each measuring apparatus is closed structure, weigher body, LOAD CELLS and annex thereof, Pneumatic discharging device, pressure unit, scale body support frame etc., consists of.Water weigher below is provided with water receiving bucket, and after water scale sluicing butterfly valve is opened, water, by water receiving bucket, feedwater capstan pump, can inject rapidly in the spray header of stirrer.
In the time of in charging equipment is sent constantly into material title body, LOAD CELLS is converted to 4～20mA current signal by pressure unit by weight, passes to computer system.Weigh after end, by computer, send instruction, charging equipment stops material loading.
After various measuring raw materials, the Pneumatic discharging device (valve) that is positioned at the weigher belows such as flyash, carbide slag, mine tailings and gypsum is opened successively, and material is put into stirrer.
Adopt 2 forced action type twin-shaft mixers, mode of operation is intermittent type.Stirrer is comprised of stirrer body, stirrer feeding unit (top cover), driving and transmission mechanism, pneumatic discharge mechanism, self-lubrication and tightness system, feedwater force (forcing) pump etc.
In order fully to improve stirrer working efficiency, the storage hopper that amount of agitation of a useful volume and stirrer adapts is set below stirrer discharge door, can realize the quickly discharging material of stirrer, shorten stirring cycle.
Computer batching is comprised of Industrial Control Computer, indicating meter, electrical control cubicles, control software and electronic devices and components etc. with Controlling System.This system can automatic zero set, the auxiliary quick school of microcomputer scale, buckle scale and system fault self-diagnosis function.School scale accurately, fast.During batching, acquisition speed is fast, resolving power is high, and the correction of lead automatic dynamic owes to claim that automatic makeup claims, super title bales catch claims.Dynamically control accuracy is higher.
(2) batching stirring technique process:
1) flyash: at the bottom of opening flyash batch bin, service valve behind the door, is opened storehouse spirit power pine bin device, and flyash overhauls valve through bottom of the reservior, tube-type spiral conveyer is sent in flyash electronic measuring scale and measured;
2) mine tailings: mine tailings batch bin has Emergency Gate.The feeding device (belt feeder) of mine tailings under storehouse sent into metering in mine tailings weighing hopper;
3) lime stone-gypsum powder: lime stone-gypsum filler bin has Emergency Gate, the feeding device (belt feeder) of lime stone-gypsum powder under storehouse sent into metering in weighing hopper;
4) water: mixing water is measured within Pneumatic butterfly valve adds water scale by feedwater piping.After water measures, open Pneumatic butterfly valve, mixing water enters stirrer water inlet shower through gutter spout funnel, in-line pump.
5) stir: measure after flyash, carbide slag, lime stone-gypsum powder, mine tailings, the pneumatic discharge valve under each scale is opened automatically by computer blas, and the material measuring is sequentially discharged in two shaft pugmill mixer.The water measuring adds in stirrer through Pneumatic butterfly valve, in-line pump, shower, and material, through the wet strong stirring of overdrying, is made uniform compound 9; Then by belt feeder, high angle belt conveyer, compound 9 is delivered to aging bunker charging layer.
3, blank preparation:
Blank preparation system comprises ageing and rolling system.
(1), ageing
1) ageing system forms
By diameter phi 1.5m continous way aging bunker and front and back feed thereof, discharging equipment, dust collecting system etc., formed single storehouse useful volume 8 m
3.
Continous way aging bunker is comprised of storehouse body, storehouse top distributor, revolution discharging drive unit, center discharge funnel etc.Rotary type distributor is installed in its top feed mouth, compound evenly, hierarchically can be arranged in storehouse, avoid material to occur inclined to one side storehouse phenomenon, guarantee the abundant ageing of compound, and make material by the discharging of warehouse entry temporal order.Aging bunker is furnished with continous way level metering installation, can realize the thing position situation of warehouse entry compound is implemented to dynamic monitoring and metering.
For the performance inconsistency of material after guaranteeing wheel roller working efficiency and reducing ageing, improve the stability of compound, measuring chute in the middle of each aging bunker bottom discharge mouth below is provided with.This intermediate bin is furnished with LOAD CELLS and pneumatic shedding mechanism, and effective capacity in this storehouse is 1.0 m
3.According to the working order of wheel roller intermediate bin, can be at any time to wheel roller intermediate bin feed.In addition, when a certain equipment of rolling system breaks down, by adjusting, reset weighing value and the aging bunker discharging drive-motor rotating speed of intermediate bin, can regulate rhythm of production completely, reduce aging bunker and cause the probability in knot storehouse because of scram.
At the top of aging bunker, arrange an endless belt conveyor and pneumatic T-piece splitting valve.Compound after stirring is delivered to behind aging bunker top, and the order by Pneumatic three-way material distributing valve commutates, and can send in the aging bunker of appointment.Also configured in addition pulsed stand-alone bag filter, unit is processed air quantity 350m
3/ h, for the treatment of the exhaust of airborne dust and the aging bunker of handling equipment discharging point.
2) ageing process process:
Aging bunker charging layer is provided with Pneumatic three-way material distributing valve, by the commutation of this valve, compound is fed in continuous aging bunker respectively; Aging bunker top material inlet mouth is provided with rotary type cloth scraper-trough conveyer, can be by the mix layered aging bunker that is distributed into; Aging bunker bottom is provided with rotary type central discharging apparatus, by motor drive speed reducer, drives pinion(gear), bull gear, unloader knife along aging bunker center steering.Compound, under scraper effect, is pushed to discharger slip awaing tube center, falls in tapered discharger slip awaing tube.
Adopt 2 continous way aging bunkers, specification is the effective capacity 5m of φ 1.5 * 6(
3), under normal production conditions, can meet the requirement of the abundant ageing of compound.
First the compound 10 that ageing is good in measuring chute, is equipped with the built-in plate-turning door of pneumatic type in the middle of elephant trunk falls under middle measuring chute, when a certain wheel roller intermediate bin hole capital after selling all securities, the built-in plate-turning door of pneumatic type is opened, and material is in endless belt conveyor is sent into wheel roller intermediate bin.
(2) rolling
Rolling system is comprised of wheel roller intermediate bin, wheel roller, material loading and discharging equipment etc.Wheel roller intermediate bin is furnished with LOAD CELLS and pneumatic shedding mechanism, and effectively capacity is 1.0m
3.Wheel roller is planetary type wheel mill, and mode of operation is intermittent type.Wheel roller by wheel roller body, driving and transmission mechanism, muller, stirring shovel, add water sprayer tube, pneumatic discharge door etc. and form, secondary moisturizing tubing system is installed and controls valve member adding water sprayer tube front end.Material loading handling equipment-belt conveyer head place of wheel roller intermediate bin front end, is provided with microwave type humidity on-line detector.Can at any time material moisture be reached to computer control system.If when moisture requires lower than moulding moisture, computer sends instruction, open secondary water compensating valve, material moisture is adjusted.
After wheel roller discharging, pneumatic discharge door is closed, and the pneumatic built-in plate-turning door of intermediate bin on wheel roller top is opened, material enters wheel roller stone roller and practices indoor, under the effect of planetary muller and stirring shovel, the compound 10 that ageing is good obtains further stirring and grinding white silk, finally makes blank 11.Then open pneumatic discharge door, with handling equipment, blank 11 is sent in forming machine intermediate bin.
4, moulding
(1) system forms:
Formation system is comprised of forming machine intermediate bin, belt feeder, press and code blanking device, dolly location and drive system, ferry bus and waste material material return system etc.
Forming machine intermediate bin has configured load sensor and Pneumatic discharging device; Press system by frame, cloth hopper, top board, ejection tong, mould, upper punch, walking beam, code blanking device, hydraulic efficiency system, electricly form with automation system, computer, electrical control cubicles, steam-cured dolly location and drive system etc.
(2) technological process
First the blank of with endless belt conveyor, stone roller being perfected is delivered in forming machine intermediate bin standby.When forming machine hopper is during in low material level, the belt feeder under press intermediate bin starts, and gives forming machine hopper feed.
Blank 11 is distributed into die cavity by forming machine charge car, through hydraulic pressure extrusion molding, makes adobe 12; Qualified adobe 12 is piled up adobe 12 on steam-cured dolly by brick stacking device; Underproof adobe and waste material, by adobe conveying belt, slip waste material to aggregate bin, regularly by manually sending back in wheel roller, again grinds and practice, for forming machine moulding again.
5, steam press maintenance
(1) system forms:
By autoclave, heat supply and conversion cylinder, heat distribution pipe network and valve thereof, valve member, instrument cabinet dish etc., formed.
(2) technological process:
After the full adobe of steam-cured dolly code, first by car positioning, by little ferry bus by loaded vehicle along marshalling track to autoclave direction.Adobe is sent into after autoclave, closes still door, passes into sealed steam.Then by autoclave middle part, pass into saturation steam, goods are carried out to maintenance.The finished product 13 use travelling hoists that maintenance is good are pulled out outside still.
Maintenance indices is in Table 2-4.
| ? | Heat up | Constant temperature | Cooling | Coolingly go out still | Total cycle |
| Time (hour) | 1.5～2.0 | 5.5～6.5 | 1.5～2 | 0.5 | 9～11 |
Table 2-4
Maximum working pressure: 1.6Mpa
Working medium: saturation steam
The highest curing temperature: 204 ℃
Heating-up time: 1.5～2 hours
Heat-up rate: the 1st hour goods of intensification should be over 100 ℃
Thermostat temperature: 190～204 ℃
Constant temperature and pressure: 1.5～1.6MPa
Cooling rate: go out 80 ℃ of still temperature difference <
2.2.6, finished product stockyard
Finished product 13 goes out after still, enters finished product unload zone.Test classification, grade, prepare finished product tailing-bricks, send into finished product stockyard.
Claims (3)
1. a mine tailing valuable element recovery process method, comprises the following steps:
1) raw material storage: raw ore enters after factory, enters fine ore bin, as the raw material of grinding operation;
2) ore grinding: adopt closed circuit grinding classification form, ore is sent into ball mill, carry out wet ball grinding, form ore pulp, ore pulp, through grading machine, is delivered to next step ore-dressing practice by the ore slurry that grinding rate is qualified, and underproof Coarse Aggregate turns back to ball mill and further regrinds;
3) ore dressing: the ore pulp of milled, after agitation vat is sized mixing and stirred evenly, enters flotation operation, output sulphur concentrate;
4) dewatering operation: the sulphur concentrate of selecting through flotation operation is transported to concentrate pond and carries out mechanical dehydration, moisture carries out export trade or further processing after 10%;
5) ore pulp of discharging is called mine tailing, passes through equally processed, for follow-up brick-making raw material.
2. mine tailing valuable element recovery process method according to claim 1, is characterized in that, in step 3) flotation operation, limonite adopts reverse floatation process, and sulfurous iron ore adopts direct floatation process.
3. the comprehensive utilization of tailing processing method of utilizing claim 1 to discharge, comprises the following steps:
1) raw material disposal: it is stand-by that flyash, tail slag are sent into respectively batch bin storage, lime, gypsum are through fragmentation, grinding, mixing, and formation lime stone-gypsum powder is sent in feed bin and is stored for future use;
2) compound preparation: the flyash measuring, lime stone-gypsum powder, tail slag, water, send into stirrer strong stirring, the compound of making is sent in successive slaking silo, and the compound having digested is sent into wheel roller and is further ground experienced, makes blank;
3) green brick forming: blank is sent in press hopper, be made as adobe through extrusion forming, scrap body material is sent back in wheel roller again to grind to practice and mixed, as blank:
4) steam press maintenance: adobe is sent into steam press maintenance in autoclave, and the product that autoclave curing is good is pulled out still, delivers to stockyard and stacks, and makes tailing-bricks.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110882851A (en) * | 2019-12-11 | 2020-03-17 | 郑州大学 | A kind of beneficiation system and beneficiation method of sulfide ore |
| CN113566893A (en) * | 2021-08-12 | 2021-10-29 | 江苏闪码光机电科技有限公司 | Multi-factor on-site detection method and device in bulk ore loading, unloading and transporting process |
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| CN101497516A (en) * | 2008-01-30 | 2009-08-05 | 谭克峰 | High-strength phosphogypsum wall material and method for making brick using the material |
| CN102491713A (en) * | 2011-11-22 | 2012-06-13 | 丁立平 | Wall material made of mine tailings and coal ash and manufacturing method thereof |
| CN102935408A (en) * | 2012-11-06 | 2013-02-20 | 永利高盛（北京）环保科技有限公司 | Flotation reagent for pyrites, preparation process of flotation reagent and flotation process |
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2014
- 2014-01-18 CN CN201410021884.9A patent/CN103754830A/en active Pending
Patent Citations (4)
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| CN1051543A (en) * | 1990-09-13 | 1991-05-22 | 山东建筑材料工业学院分院 | With gold concentrator tailings producing building material |
| CN101497516A (en) * | 2008-01-30 | 2009-08-05 | 谭克峰 | High-strength phosphogypsum wall material and method for making brick using the material |
| CN102491713A (en) * | 2011-11-22 | 2012-06-13 | 丁立平 | Wall material made of mine tailings and coal ash and manufacturing method thereof |
| CN102935408A (en) * | 2012-11-06 | 2013-02-20 | 永利高盛（北京）环保科技有限公司 | Flotation reagent for pyrites, preparation process of flotation reagent and flotation process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110882851A (en) * | 2019-12-11 | 2020-03-17 | 郑州大学 | A kind of beneficiation system and beneficiation method of sulfide ore |
| CN110882851B (en) * | 2019-12-11 | 2022-04-12 | 郑州大学 | Beneficiation system and beneficiation method for sulfide ore |
| CN113566893A (en) * | 2021-08-12 | 2021-10-29 | 江苏闪码光机电科技有限公司 | Multi-factor on-site detection method and device in bulk ore loading, unloading and transporting process |
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Application publication date: 20140430 |