CN105665122B - The beneficiation method of troilite is reclaimed from gangue - Google Patents

The beneficiation method of troilite is reclaimed from gangue Download PDF

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Publication number
CN105665122B
CN105665122B CN201610020089.7A CN201610020089A CN105665122B CN 105665122 B CN105665122 B CN 105665122B CN 201610020089 A CN201610020089 A CN 201610020089A CN 105665122 B CN105665122 B CN 105665122B
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gangue
troilite
conical surface
reclaimed
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CN105665122A (en
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张晋霞
牛福生
张晓亮
李卓林
徐之帅
邹玄
于浩
刘亚
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Tangshan Lianzhong Coal Dressing Technology Co ltd
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North China University of Science and Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B03B5/04Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on shaking tables

Abstract

The invention discloses a kind of beneficiation method that troilite is reclaimed from gangue, this method uses following techniques:(1)Gangue is classified using double-deck screen shale shaker after crushing;The coarse fraction product of classification is sorted using dense media vibratory sluice, obtains concentrate product and mine tailing;After concentrate product removing medium, coarse fraction troilite is obtained;(2)The median particle size product of classification is sorted using sand table, obtains middle grade troilite and mine tailing;(3)The fine fraction product of classification is through grind grading, removing sludge, through flotation with obtaining coal+pyrite product and mine tailing after sorting.This method is divided into thickness size fractionated after gangue is crushed, coarse fraction is sub-elected coarsely graded gangue mineral, reduced the cost of direct ore grinding using the relatively low dense media vibratory sluice of production cost;The uneven gangue of the disseminated grain size that is particularly suitable for use in, the rate of recovery of troilite is greatly improved, and synchronously other valuable elements are carried out with extraction in assorting room to increase its added value.

Description

The beneficiation method of troilite is reclaimed from gangue
Technical field
The present invention relates to a kind of beneficiation method, especially a kind of beneficiation method that troilite is reclaimed from gangue.
Background technology
Gangue refers to the solid waste that coal gives off during exploitation and dressing of coal by washing, accounts for whole coal production 10% or so of amount.Counted according to update, the existing spoil volume of cargo in storage in China is up to more than 45 hundred million tons, and with 300,000,000 tons/year of speed still It is being constantly increasing, is being one of solid waste of yield and volume of cargo in storage maximum in industry.The stockpiling of spoil not only causes resource Serious waste, and different degrees of pollution is caused to environment such as air, soil and water sources, if strengthening to its comprehensive resource Research on utilization, gangue can be made to be converted into useful resource.Meanwhile contain a number of sulphur iron in the gangue in many places Ore deposit, troilite are the optimum feed stocks for producing sulfuric acid, can be that enterprise creates if the troilite ore deposit in gangue is extracted Go out more considerable economic benefit.
With the progress of science and technology, the appearance of new medicament, new technology, equipment, to the extraction profit of troilite in gangue With achieving breakthrough progress, the method that troilite is extracted in typical gangue is mainly gravity treatment or flotation, the former Outstanding problem is that recovery rate in ore-dressing is relatively low, and substantial amounts of troilite loss is in mine tailing;The problem of the latter brings mainly has:1. crush The direct ore grinding of ore afterwards, causes ore dressing plant cost higher;2. the extraction in floatation process to troilite needs the medicament added Complexity, there are pH regulators, inhibitor, activator, collecting agent, foaming agent etc., while roughing is extremely difficult to higher grade, also needs Concentration process flow is carried out, while the clay minerals of easily argillization can be adsorbed on troilite surface, cause flotation selectivity to be deteriorated. For the uneven gangue of disseminated grain size, it is difficult to realize it simply by gravity treatment or flotation and efficiently separates.
The content of the invention
Sulphur is reclaimed from gangue the technical problem to be solved in the present invention is to provide a kind of recovery rate in ore-dressing is high, grade is high The beneficiation method of iron ore, the uneven gangue of the disseminated grain size that is particularly suitable for use in.
In order to solve the above technical problems, the present invention uses following techniques:(1)Gangue uses double-deck screen shale shaker after crushing Classification;The coarse fraction product of classification is sorted using dense media vibratory sluice, obtains concentrate product and mine tailing;The removing of concentrate product is situated between After matter, coarse fraction troilite is obtained;
(2)The median particle size product of classification is sorted using sand table, obtains middle grade troilite and mine tailing;
(3)The fine fraction product of classification obtains coal+pyrite product and mine tailing through grind grading, removing sludge.
Further processing step is the present invention:(1)Gangue is after single stage crushing operation by double-deck screen shale shaker, classification For coarse fraction product, median particle size product and fine fraction product;Coarse fraction product is after dense media vibratory sluice sorting, gangue ore deposit Thing is as mine tailing;Concentrate product carries out de-mediated through linear vibrating screen, and oversize is coarse fraction troilite, and undersize is through wet type After high intensity magnetic separation, magnetic product is back to dense media vibratory sluice, and non-magnetic product feeds step(3)In grinding operation;
(2)The middle grade product enters sand table and carries out two sections of sortings, and chats order returns, and obtains middle grade sulphur iron Ore deposit and mine tailing;
(3)The fine fraction product and step(1)In non-magnetic product carry out grinding operation, make the overflow of classifying equipoment Granularity is that -0.074mm accounts for 80%~90%, and the overflow of classifying equipoment feeds cone classifier desliming, and overflow muddy material is as tail Ore deposit, the underflow of cone classifier is as coal+pyrite product.
Further, the step(1)In, the magnetic field intensity of wet high-intensity magnetic separation is 450KA/m~640KA/m, pulsation 22~30mm of stroke, pulsation jig frequency are 300~350 times/min, and ore pulp mass concentration is 25%~35%.
Further, the grade of the coarse fraction product is 30~5mm, and the grade of median particle size product is 5~2mm, carefully The grade of grade product is 2~0mm.
Further, the step(3)In coal+pyrite product carry out flotation operation, obtain cleaned coal and flotation tail Ore deposit;Flotation tailing sorts into two sections of suspended vibrating concentrating machine with conical surface, obtains fine fraction troilite and mine tailing.
Further, sorted using suspended vibrating concentrating machine with conical surface I and suspended vibrating concentrating machine with conical surface II;Outstanding conical surface ore dressing of shaking Machine I sorting face velocity of rotation is 1.0~1.5r/min, and card vibration frequency is 350~400 times/min, rinses water flow velocity and is 1.0~1.5m3/ h, mine-supplying quantity are 0.27~0.42t/h, and ore pulp mass concentration is 15%~25%;Suspended vibrating concentrating machine with conical surface II Sorting face velocity of rotation is 1.0~1.5r/min, and card vibration frequency is 350~400 times/min, rinse water flow velocity be 1.2~ 1.8m3/ h, mine-supplying quantity are 0.22~0.30t/h, and ore pulp mass concentration is 12%~23%.
It is using beneficial effect caused by above-mentioned technical proposal:(1)The present invention is divided into thickness after gangue is crushed Size fractionated, coarse fraction are sub-elected coarsely graded gangue mineral, reduced using the relatively low dense media vibratory sluice of production cost The cost of direct ore grinding;The uneven gangue of the disseminated grain size that is particularly suitable for use in, according to the uneven property of gangue disseminated grain size Matter, the ferro-sulphur ore in grading extraction gangue, the rate of recovery of troilite is so greatly improved, and it is synchronous in assorting room Other valuable elements are carried out with extraction increases its added value.
(2)The present invention carries out preselecting desliming operation using cone classifier, reduces the follow-up flotation selection of shale Mineral pairs The influence of property, the cleaned coal sub-elected can increase the added value of gangue processing and utilization.
(3)Suspended vibrating concentrating machine with conical surface is a kind of screening installation of new fine granule material, using the equipment to fine fraction Troilite reclaimed, achieve preferable separation index.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the technical process schematic diagram of the present invention;
Fig. 2 is the XRD analysis figure of gangue;
Fig. 3 is observation picture of the gangue under reflective mirror.
Embodiment
Predominant quantity percentage composition is in gangue used in following embodiments:SiO264.03%, S 4.92%, Al2O320.48%, Fe2O34.21%, K2O 3.47%, MgO 0.54%, CaO 1.78%.By the XRD analysis of Fig. 2 gangue raw ores As a result show, the mineral contained in gangue mainly have:Troilite, quartz, clinochlore, kaolin, illite and carbon;Together When from the reflective Microscopic observation picture of Fig. 3 gangues can be seen that in gangue raw ore troilite and quartz, kaolin etc. in inequality The even embedding cloth of granularity.
Embodiment 1:Shown in Fig. 1, this beneficiation method that troilite is reclaimed from gangue uses following concrete technology steps.
(1)Gangue shakes after single stage crushing operation by double-deck screen shale shaker, 30~5mm coarse fraction product through dense media After dynamic sluicing, gangue mineral is as mine tailing;Concentrate product carries out de-mediated through linear vibrating screen, and oversize is coarse fraction sulphur Iron ore, for undersize after Wet-type strong magnetic separator carries out high intensity magnetic separation, magnetic product is back to dense media vibratory sluice, non magnetic production Product feed step(3)Grinding operation;Wherein, the magnetic field intensity of Wet-type strong magnetic separator is 480KA/m, pulsion stroke 25mm, arteries and veins Dynamic jig frequency is 310 times/min, and ore pulp mass concentration is 28%.
(2)5~2mm middle grade product carries out two sections of sortings using sand table I and sand table II, and two sections sorted Cheng Wei:Middle grade product is sorted into sand table I, and sand table I middling recurrence sand table I is selected again, ore deposit Sand shaking table I concentrate feeds sand table II and selected again, grade troilite in the concentrate product conduct of sand table II, ore in sand form The chats product of shaking table II is back to sand table II and selected again, and the mine tailing of sand table I and sand table II is as mine tailing Product.
(3)2~0mm fine fraction product and the non-magnetic product of Wet-type strong magnetic separator carry out grinding operation, set classification Standby overflow granularity is that -0.074mm accounts for 82.41%, and the overflow of classifying equipoment feeds cone classifier desliming, overflow muddy material As mine tailing, the underflow of cone classifier is coal+pyrite product.
The coal+pyrite product carries out flotation operation, and the cleaned coal increase bastard coal stone ore processing and utilization of flotation adds Value;Flotation tailing carries out two sections using suspended vibrating concentrating machine with conical surface I and suspended vibrating concentrating machine with conical surface II and sorted, and both ends sort process and are: Flotation tailing is sorted into suspended vibrating concentrating machine with conical surface I, suspended vibrating concentrating machine with conical surface I middling recurrence suspended vibrating concentrating machine with conical surface I Selected again, suspended vibrating concentrating machine with conical surface I concentrate feeds suspended vibrating concentrating machine with conical surface II and selected again, suspended vibrating concentrating machine with conical surface II Concentrate product is back to suspended vibrating concentrating machine with conical surface II and carried out as fine fraction troilite, the chats product of suspended vibrating concentrating machine with conical surface II Select again, the mine tailing of suspended vibrating concentrating machine with conical surface I and suspended vibrating concentrating machine with conical surface II is as mine tailing.Wherein, suspended vibrating concentrating machine with conical surface I point It is 1.2r/min to select face velocity of rotation, and card vibration frequency is 365 times/min, and flushing water flow velocity is 1.2m3/ h, mine-supplying quantity are 0.42t/h, ore pulp mass concentration are 22%;The sorting face velocity of rotation of suspended vibrating concentrating machine with conical surface II is 1.5r/min, and card is vibrated Frequency is 380 times/min, and flushing water flow velocity is 1.6m3/ h, mine-supplying quantity 0.25t/h, ore pulp mass concentration are 17%.
Gangue finally gives the sulphur iron that grade is 39.08%, the rate of recovery is 90.13% after above method processing Mineral products, and the head coal product that ash content is 10.25%, yield is 5.23%.
Embodiment 2:This beneficiation method that troilite is reclaimed from gangue uses following concrete technology steps.
(1)Gangue shakes after single stage crushing operation by double-deck screen shale shaker, 30~5mm coarse fraction product through dense media After dynamic sluicing, gangue mineral is as mine tailing;Concentrate product carries out de-mediated through linear vibrating screen, and oversize is coarse fraction sulphur Iron ore, for undersize after Wet-type strong magnetic separator carries out high intensity magnetic separation, magnetic product is back to dense media vibratory sluice, non magnetic production Product feed step(3)Grinding operation;Wherein, the magnetic field intensity of Wet-type strong magnetic separator is 520KA/m, pulsion stroke 27mm, arteries and veins Dynamic jig frequency is 330 times/min, and ore pulp mass concentration is 30%.
(2)5~2mm middle grade product carries out two sections of sortings using sand table I and sand table II, and two sections sorted Cheng Wei:Middle grade product is sorted into sand table I, and sand table I middling recurrence sand table I is selected again, ore deposit Sand shaking table I concentrate feeds sand table II and selected again, grade troilite product in the concentrate product conduct of sand table II, The chats product of sand table II is back to sand table II and selected again, the mine tailing conduct of sand table I and sand table II Product from failing.
(3)2~0mm fine fraction product and the non-magnetic product of Wet-type strong magnetic separator carry out grinding operation, set classification Standby overflow granularity is that -0.074mm accounts for 89.94%, and the overflow of classifying equipoment feeds cone classifier desliming, overflow muddy material As mine tailing, the underflow of cone classifier is coal+pyrite product.
The coal+pyrite product carries out flotation operation, and the cleaned coal increase bastard coal stone ore processing and utilization of flotation adds Value, flotation tailing carry out two sections using suspended vibrating concentrating machine with conical surface I and suspended vibrating concentrating machine with conical surface II and sorted, and both ends sort process and are: Flotation tailing is sorted into suspended vibrating concentrating machine with conical surface I, suspended vibrating concentrating machine with conical surface I middling recurrence suspended vibrating concentrating machine with conical surface I Selected again, suspended vibrating concentrating machine with conical surface I concentrate feeds suspended vibrating concentrating machine with conical surface II and selected again, suspended vibrating concentrating machine with conical surface II Concentrate product is back to suspended vibrating concentrating machine with conical surface II and carried out as fine fraction troilite, the chats product of suspended vibrating concentrating machine with conical surface II Select again, the mine tailing of suspended vibrating concentrating machine with conical surface I and suspended vibrating concentrating machine with conical surface II is as mine tailing.Wherein, suspended vibrating concentrating machine with conical surface I point It is 1.5r/min to select face velocity of rotation, and card vibration frequency is 385 times/min, and flushing water flow velocity is 1.4m3/ h, mine-supplying quantity are 0.35t/h, ore pulp mass concentration are 20%;The sorting face velocity of rotation of suspended vibrating concentrating machine with conical surface II is 1.5r/min, and card is vibrated Frequency is 400 times/min, and flushing water flow velocity is 1.8m3/ h, mine-supplying quantity 0.22t/h, ore pulp mass concentration are 15%.
Gangue finally gives the sulphur iron that grade is 39.91%, the rate of recovery is 89.72% after above method processing Mineral products, and the head coal product that ash content is 10.15%, yield is 5.06%.
Embodiment 3:This beneficiation method that troilite is reclaimed from gangue uses following concrete technology steps.
Except following differences, remaining technique is the same as embodiment 1:
Step(1)In:The magnetic field intensity of Wet-type strong magnetic separator is 450KA/m, pulsion stroke 26mm, and pulsation jig frequency is 350 Secondary/min, ore pulp mass concentration are 35%.
Step(3)In:The overflow granularity of classifying equipoment is that -0.074mm accounts for 80%;Suspended vibrating concentrating machine with conical surface I sorting face turns Dynamic speed is 1.3r/min, and card vibration frequency is 400 times/min, and flushing water flow velocity is 1.0m3/ h, mine-supplying quantity 0.32t/h, Ore pulp mass concentration is 15%;The sorting face velocity of rotation of suspended vibrating concentrating machine with conical surface II is 1.3r/min, and card vibration frequency is 350 times/min, flushing water flow velocity is 1.4m3/ h, mine-supplying quantity 0.30t/h, ore pulp mass concentration are 20%.
Gangue finally gives the sulphur iron that grade is 38.97%, the rate of recovery is 91.23% after above method processing Mineral products, and the head coal product that ash content is 10.22%, yield is 5.21%.
Embodiment 4:This beneficiation method that troilite is reclaimed from gangue uses following concrete technology steps.
Except following differences, remaining technique is the same as embodiment 2:
Step(1)In:The magnetic field intensity of Wet-type strong magnetic separator is 580KA/m, pulsion stroke 30mm, and pulsation jig frequency is 320 Secondary/min, ore pulp mass concentration are 25%.
Step(3)In:The overflow granularity of classifying equipoment is that -0.074mm accounts for 90%;Suspended vibrating concentrating machine with conical surface I sorting face turns Dynamic speed is 1.0r/min, and card vibration frequency is 375 times/min, and flushing water flow velocity is 1.5m3/ h, mine-supplying quantity 0.27t/h, Ore pulp mass concentration is 18%;The sorting face velocity of rotation of suspended vibrating concentrating machine with conical surface II is 1.2r/min, and card vibration frequency is 370 times/min, flushing water flow velocity is 1.2m3/ h, mine-supplying quantity 0.27t/h, ore pulp mass concentration are 12%.
Gangue finally gives the sulphur iron that grade is 40.51%, the rate of recovery is 88.73% after above method processing Mineral products, and the head coal product that ash content is 10.41%, yield is 4.96%.
Embodiment 5:This beneficiation method that troilite is reclaimed from gangue uses following concrete technology steps.
Except following differences, remaining technique is the same as embodiment 1:
Step(1)In:The magnetic field intensity of Wet-type strong magnetic separator is 640KA/m, pulsion stroke 22mm, and pulsation jig frequency is 300 Secondary/min, ore pulp mass concentration are 32%.
Step(3)In:The overflow granularity of classifying equipoment is that -0.074mm accounts for 85.02%;Suspended vibrating concentrating machine with conical surface I sorting Face velocity of rotation is 1.3r/min, and card vibration frequency is 350 times/min, and flushing water flow velocity is 1.3m3/ h, mine-supplying quantity are 0.38t/h, ore pulp mass concentration are 25%;The sorting face velocity of rotation of suspended vibrating concentrating machine with conical surface II is 1.0r/min, and card is vibrated Frequency is 375 times/min, and flushing water flow velocity is 1.3m3/ h, mine-supplying quantity 0.26t/h, ore pulp mass concentration are 23%.
Gangue finally gives the sulphur iron that grade is 39.57%, the rate of recovery is 90.04% after above method processing Mineral products, and the head coal product that ash content is 10.08%, yield is 5.12%.

Claims (5)

1. a kind of beneficiation method that troilite is reclaimed from gangue, it is characterised in that this method uses following processing steps:
(1)Gangue by double-deck screen shale shaker, is classified as coarse fraction product, median particle size product and thin after single stage crushing operation Grade product;Coarse fraction product is after dense media vibratory sluice sorting, and gangue mineral is as mine tailing;Concentrate product is through straight-line oscillation Sieve carries out de-mediated, and oversize is coarse fraction troilite, and for undersize after wet high-intensity magnetic separation, magnetic product is back to dense media Vibratory sluice, non-magnetic product feed step(3)In grinding operation;
(2)The middle grade product enter sand table carry out two sections sorting, chats order return, obtain middle grade troilite and Mine tailing;
(3)The fine fraction product and step(1)In non-magnetic product carry out grinding operation, make the overflow granularity of classifying equipoment 80%~90% is accounted for for -0.074mm, the overflow of classifying equipoment feeds cone classifier desliming, and overflow muddy material is as mine tailing, circle The underflow of grader is bored as coal+pyrite product.
2. the beneficiation method according to claim 1 that troilite is reclaimed from gangue, it is characterised in that:The step (1)In, the magnetic field intensity of wet high-intensity magnetic separation is 450KA/m~640KA/m, 22~30mm of pulsion stroke, pulsation jig frequency is 300~ 350 times/min, ore pulp mass concentration is 25%~35%.
3. the beneficiation method according to claim 1 that troilite is reclaimed from gangue, it is characterised in that:The coarse fraction The grade of product is 30~5mm, and the grade of median particle size product is 5~2mm, and the grade of fine fraction product is 2~0mm.
4. the beneficiation method that troilite is reclaimed from gangue according to claim 1-3 any one, its feature exist In:The step(3)In coal+pyrite product carry out flotation operation, obtain cleaned coal and flotation tailing;Flotation tailing enters Two sections of suspended vibrating concentrating machine with conical surface sorts, and obtains fine fraction troilite and mine tailing.
5. the beneficiation method according to claim 4 that troilite is reclaimed from gangue, it is characterised in that:Using the outstanding cone that shakes Face ore separators I and suspended vibrating concentrating machine with conical surface II are sorted;Suspended vibrating concentrating machine with conical surface I sorting face velocity of rotation be 1.0~ 1.5r/min, card vibration frequency are 350~400 times/min, and flushing water flow velocity is 1.0~1.5m3/ h, mine-supplying quantity be 0.27~ 0.42t/h, ore pulp mass concentration are 15%~25%;The sorting face velocity of rotation of suspended vibrating concentrating machine with conical surface II is 1.0~1.5r/ Min, card vibration frequency are 350~400 times/min, and flushing water flow velocity is 1.2~1.8m3/ h, mine-supplying quantity be 0.22~ 0.30t/h, ore pulp mass concentration are 12%~23%.
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CN106583415B (en) * 2016-12-05 2019-09-13 山西省生态环境研究中心 A kind of coal gangue component method of comprehensive utilization
CN106994387B (en) * 2017-05-05 2020-06-23 深圳市中金岭南科技有限公司 Multiple layering, zoning and screening reselection method
CN111515015B (en) * 2020-04-29 2021-08-20 江西理工大学 Mineral separation process for jointly separating zircon and titanium ores by using spiral chute of high-frequency vibrating screen
CN114247553B (en) * 2021-12-03 2024-03-12 内蒙古科技大学 Comprehensive separation method for gangue minerals
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CN115921128A (en) * 2023-01-05 2023-04-07 鞍钢集团矿业有限公司 Ore grinding-weak magnetic strong magnetic-coarse grain gravity separation regrinding and fine grain reverse flotation process

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Patentee before: NORTH CHINA University OF SCIENCE AND TECHNOLOGY

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Address after: 063009 Production workshop 01, north of Nankai Road, east of Xichang Road, High tech Development Zone, Tangshan City, Hebei Province

Patentee after: TANGSHAN LIANZHONG COAL DRESSING TECHNOLOGY Co.,Ltd.

Address before: 063012 North Construction Road 152, Tangshan High-tech Zone, Hebei Province (Block C, 902, Oriental Building)

Patentee before: TANGSHAN LIANZHONG COAL DRESSING TECHNOLOGY Co.,Ltd.

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