CN103433122B - A kind of medium tin ore sub-prime classification and sorting technique - Google Patents
A kind of medium tin ore sub-prime classification and sorting technique Download PDFInfo
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Abstract
The present invention relates to a kind of medium tin ore sub-prime classification and sorting technique, step is as follows: (1) is by sand table mine tailing scalping; (2) enrichment is carried out in scalping coarse grain sand setting ore deposit and front heavy-tailed ore deposit; (3) secondary grading is carried out in scalping overflow ore deposit and fine sand oscillating table mine tailing; (4) three classifications are carried out after being mixed with the concentrate sub-elected through step (2) in secondary grading sand setting ore deposit; (5) by four classifications in three Grading Overflow ore deposits, four times described classification sand setting ore deposits sort with shaking table and obtain chats Tin concentrate and mine tailing after floatation desulphurization, and four times described Grading Overflow ore deposits obtain sulphide ore, Tin concentrate and mine tailing respectively after desliming, desulfurization flotation and floating tin flotation.This technique solves that tin ore dressing plant main flow chats pulp density is little, particle size differences is large, grinding particle size polarization is serious, concentrate grade and the low difficult problem of the rate of recovery, the tin rate of recovery is improved 2.14%, reduce tailings discharging amount 2.7 ten thousand tons, reduce energy consumption, medicine consumption simultaneously.
Description
Technical field
The present invention relates to a kind of medium tin ore sub-prime classification and sorting technique, belong to metallic ore technical field of beneficiation.
Background technology
Often can produce a large amount of medium tin ores in the production process of tin ore dressing plant, need to process process further, could recycle.Because chats pulp density is little, particle size differences is large, and grinding particle size polarization is serious, and have part be difficult to be separated intergrowth, washability is close, cassiterite and other ore separation difficulty large, directly affects the raising of ore dressing metal recovery rate, cause beneficiation cost to rise, economic benefit declines.Visible, chats problem perplexs the difficult problem in many middle-size and small-size ore dressing plants.
At present, what generally adopt the process of chats is middlings selective classification and regrinding technique, by the middling recurrence grinding-classification operation being rich in intergrowth in floatation process, carry out selectively grading and regrinding, make same section ore grinding and flotation form circulation valuable mineral being carried out to continuous selective milling, classification and flotation, thus reach best grind grading flotation effect.This technique chats can to dissociate situation and valuable mineral content according to monomer whose, and alternative returns same section ball mill and regrinds to enter and regrind, and effectively improves dissociating of valuable mineral flotation.Coarse grain after classified returns to be regrinded, and obviously can improve flotation to ore deposit mineral granularity composition, reduce the overground phenomenon of particulate.But this technological process is more loaded down with trivial details, chats need could obtain the higher rate of recovery through repeatedly ore grinding and floatation process, and this technique ore mill mine-supplying quantity is large, is unfavorable for the grinding efficiency improving ore mill.
Chehe Ore Dressing Factory, China Tin Group Co., Ltd. be one to process tin, the mammoth mill of year treating capacity 1,700,000 tons, its chats is mainly front heavy-tailed ore deposit, sand table mine tailing, fine sand oscillating table mine tailing and slimer mine tailing, each mine tailing accounts for chats productive rate and is respectively 50%, 25%, 15%, 10%, and chats accounts for the productive rate of raw ore and tin distributive law is respectively 40%, 20%.The medium tin ore ore-dressing technique of this factory's early application is as follows: concentrated by all chats and carry out classification, floating tin is entered in overflow, sand setting spiral chute enrichment, mine tailing loses tail, concentrate spiral classifier classification, floating tin is entered in overflow, and sand return is entered ore mill and regrinded, ore mill ore discharge sorts with shaking table and obtains chats Tin concentrate and mine tailing after floatation desulphurization, and its technological process as shown in Figure 1.Fail in this technical process to realize effective classification and sorting, make spiral chute poor to fine fraction ore recovering effect, cause finely-divided metal to fail effectively reclaim and be lost in mine tailing;-0.074 millimeter of grade ore on the other hand more than 10% is regrinded easily to cross and is pulverized, and ore enters ore mill, reduces ore mill production capacity, causes fine fraction metal cross powder and cannot reclaim simultaneously.In addition, this technique fails to realize effective sub-prime sorting, and make ore grinding load large, grinding machine ore discharge coarse size, ore liberation degree of minerals are low, and the tin rate of recovery is low, and grinding efficiency is poor, and cause follow-up desulfurization flotation pyrite removal efficiency low, cassiterite liberation degree of minerals is low, and tin grade is low.
Summary of the invention
The present invention is directed to that tin ore dressing plant main flow chats pulp density is little, particle size differences be large, grinding particle size polarization is serious, concentrate grade and the low difficult problem of the rate of recovery, provide a kind of medium tin ore sub-prime classification and sorting technique, to overcome above-mentioned deficiency of the prior art.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of medium tin ore sub-prime classification and sorting technique, is characterized in that: carry out sub-prime classification to chats before chats enrichment, concrete steps are as follows:
(1) by sand table mine tailing scalping, scalping coarse grain sand setting ore deposit and scalping overflow ore deposit is obtained;
(2) enrichment is carried out in scalping coarse grain sand setting ore deposit and front heavy-tailed ore deposit, sub-elect concentrate and tailings, mine tailing loses tail;
(3) secondary grading is carried out in scalping overflow ore deposit and fine sand oscillating table mine tailing, obtain secondary grading sand setting ore deposit and the superfine grade ore of secondary grading, described secondary grading superfine grade ore enters floating tin system, obtains sulphide ore, Tin concentrate and mine tailing respectively after desliming after desulfurization flotation and floating tin flotation;
(4) three classifications are carried out after being mixed with the concentrate sub-elected through step (2) in secondary grading sand setting ore deposit, obtain three classification sand setting ore deposits and three Grading Overflow ore deposits, sort obtain sulphide ore, chats Tin concentrate and mine tailing through floatation desulphurization, shaking table after ore grinding is carried out in three classification sand setting ore deposits;
(5) by four classifications in three Grading Overflow ore deposits, obtain four classification sand setting ore deposits and four Grading Overflow ore deposits, four times described classification sand setting ore deposits sort with shaking table and obtain chats Tin concentrate and mine tailing after floatation desulphurization, and four times described Grading Overflow ore deposits obtain sulphide ore, Tin concentrate and mine tailing respectively after desliming, desulfurization flotation and floating tin flotation.
Described enrichment adopts sawtooth pulsation jig enrichment coarse fraction ore.
The milling medium that described ore grinding adopts is rod iron or steel section or steel ball.
The milling medium that described ore grinding adopts is steel section.
The grinding particle size of described milling medium is-60 orders, and content is 75% ~ 80%.That is to say, in milling medium, be less than 60 object granule contents account for 75 ~ 80%.
Advantage of the present invention:
1. adopt the method for pre-classification before enrichment, reduce fine fraction cassiterite loss 30%; Adopt the method for pre-classification before ore grinding, ore mill can be reduced to ore deposit fine fraction content 50%, prevent finely-divided metal to regrind pulverizing.
2. with traditional handicraft by all chats mixed processing and only carrying out compared with scalping before ore grinding, this technique carries out differentiating and processing to different chats, and before ore grinding, carried out three rational classifications respectively, not only reduce the ore grinding quantity in sand setting ore deposit, also improve recovery rate and the extraction efficiency in first-class ore deposit, greatly save production cost.
3. adopt sawtooth waveforms jigging to coarse fraction ore recuperation better effects if, tin concentration ratio, the rate of recovery improve 50% and 20% respectively.
4. the tin rate of recovery is improved 2.14% by this technique, and annual fecund goes out tin metal 171.2 tons, reduces tailings discharging amount 2.7 ten thousand tons, reduces energy consumption, medicine consumption simultaneously.
Accompanying drawing explanation
Fig. 1 is the process chart of prior art
Fig. 2 is process chart of the present invention.
Detailed description of the invention
Be described in further detail the present invention below in conjunction with drawings and Examples, the present embodiment is only do clearer explanation to the present invention, instead of limitation of the present invention.
Embodiment:
As shown in Figure 2, medium tin ore is mainly front heavy-tailed ore deposit, coarse sand tailstock ore deposit, fine sand tailstock ore deposit, sludge tailstock ore deposit, each several part chats granularity and degree of dissociation of mineral monomer widely different, front heavy-tailed ore particle degree is the thickest,-0.074 millimeter of grain size content is only 3.2%, cassiterite and pyrite liberation degree of minerals all very low; Sand table mine tailing granularity and liberation degree of minerals take second place; Fine sand oscillating table mine tailing and slimer mine tailing granularity are then comparatively thin, and-0.074 millimeter of grain size content is respectively 76.3%, 100%, accordingly, cassiterite and pyrite liberation degree of minerals all higher.
A kind of medium tin ore sub-prime classification and sorting technique, wherein, carry out sub-prime classification to chats before chats enrichment, concrete steps are as follows:
(1) by sand table mine tailing scalping, scalping coarse grain sand setting ore deposit and scalping overflow ore deposit is obtained;
(2) enrichment is carried out in scalping coarse grain sand setting ore deposit and front heavy-tailed ore deposit, sub-elect concentrate and tailings, mine tailing loses tail;
(3) secondary grading is carried out in scalping overflow ore deposit and fine sand oscillating table mine tailing, obtain secondary grading sand setting ore deposit and the superfine grade ore of secondary grading, described secondary grading superfine grade ore enters floating tin system, obtains sulphide ore, Tin concentrate and mine tailing respectively after desliming after desulfurization flotation and floating tin flotation;
(4) three classifications are carried out after being mixed with the concentrate sub-elected through step (2) in secondary grading sand setting ore deposit, obtain three classification sand setting ore deposits and three Grading Overflow ore deposits, sort obtain sulphide ore, chats Tin concentrate and mine tailing through floatation desulphurization, shaking table after ore grinding is carried out in three classification sand setting ore deposits;
(5) by four classifications in three Grading Overflow ore deposits, obtain four classification sand setting ore deposits and four Grading Overflow ore deposits, four times described classification sand setting ore deposits sort with shaking table and obtain chats Tin concentrate and mine tailing after floatation desulphurization, and four times described Grading Overflow ore deposits obtain sulphide ore, Tin concentrate and mine tailing respectively after desliming, desulfurization flotation and floating tin flotation.
Described enrichment adopts sawtooth pulsation jig enrichment coarse fraction ore.
The milling medium that described ore grinding adopts is steel section.The grinding particle size of described milling medium is-60 orders, and content is 75% ~ 80%.
Embodiment 2:
The difference of the present embodiment and embodiment 1 is: the milling medium that described ore grinding adopts is steel ball.
Embodiment 3:
The difference of the present embodiment and embodiment 1 is: the milling medium that described ore grinding adopts is rod iron.
Comparative example:
Concentrated by all chats and carry out classification, floating tin is entered in overflow, sand setting spiral chute enrichment, and mine tailing loses tail, concentrate spiral classifier classification, and floating tin is entered in overflow, after desliming, desulfurization flotation, floating tin floatation process, obtain Tin concentrate, sulphide ore and mine tailing; Dirt sand goal mill is regrinded, and ore mill ore discharge sorts with shaking table and obtains chats Tin concentrate and mine tailing after floatation desulphurization.
Adopt this chats sub-prime classification and sorting technique, Results is as follows:
1. after adopting new stage division, spiral chute load reduces by 23%, fine fraction cassiterite loss minimizing 30%, and ore mill reduces 50% to ore deposit fine fraction content; Adopt sawtooth waveforms jigging to coarse fraction ore recuperation better effects if, tin concentration ratio, the rate of recovery improve 50% and 20% respectively.
2. tin mineral processing index significantly improves, and new technology and former flow process tin recovery index are in table 1.
Table 1 new technology and former flow process tin recovery index contrast table
Table 1 data can be found out, after adopting new technology, Tin concentrate tin grade has brought up to 48.2% by 35.5%, improves 14.7%; By 19.5%, 30.2% is brought up to the chats rate of recovery, has improve 10.7%; By 3.9%, 6.04% is brought up to the raw ore rate of recovery, has improve 2.14%.It is 8000 tons that the ore dressing of car river processes tin metal amount every year, and after adopting new technology, fecund goes out tin metal 171.2 tons.
3. flow process energy consumption, medicine consumption reduce, and because the useless rate raising of coarse fraction throwing and the fine fraction ore amount of regrinding reduce, reduce ore grinding, flotation energy consumption and floating agent amount, and through statistics, new technology reduction energy consumption, medicine consumption are respectively 12%, 8%.
4. tailings discharging amount reduces, and because metal obtains effective enrichment and degree of dissociation of mineral monomer raising, the sulphide ore rate of recovery significantly improves, annual minimizing tailings discharging amount 2.7 ten thousand tons.
Claims (6)
1. a medium tin ore sub-prime classification and sorting technique, is characterized in that: carry out sub-prime classification to chats before chats enrichment, concrete steps are as follows:
(1) by sand table mine tailing scalping, scalping coarse grain sand setting ore deposit and scalping overflow ore deposit is obtained;
(2) enrichment is carried out in scalping coarse grain sand setting ore deposit and front heavy-tailed ore deposit, sub-elect concentrate and tailings, mine tailing loses tail;
(3) secondary grading is carried out in scalping overflow ore deposit and fine sand oscillating table mine tailing, obtain secondary grading sand setting ore deposit and the superfine grade ore of secondary grading, described secondary grading superfine grade ore enters floating tin system, obtains sulphide ore, Tin concentrate and mine tailing respectively after desliming after desulfurization flotation and floating tin flotation;
(4) three classifications are carried out after being mixed with the concentrate sub-elected through step (2) in secondary grading sand setting ore deposit, obtain three classification sand setting ore deposits and three Grading Overflow ore deposits, sort obtain sulphide ore, chats Tin concentrate and mine tailing through floatation desulphurization, shaking table after ore grinding is carried out in three classification sand setting ore deposits;
(5) by four classifications in three Grading Overflow ore deposits, obtain four classification sand setting ore deposits and four Grading Overflow ore deposits, four times described classification sand setting ore deposits sort with shaking table and obtain chats Tin concentrate and mine tailing after floatation desulphurization, and four times described Grading Overflow ore deposits obtain sulphide ore, Tin concentrate and mine tailing respectively after desliming, desulfurization flotation and floating tin flotation.
2. medium tin ore sub-prime classification and sorting technique according to claim 1, is characterized in that: described enrichment adopts sawtooth pulsation jig enrichment coarse fraction ore.
3. medium tin ore sub-prime classification and sorting technique according to claim 1 and 2, is characterized in that: the milling medium that described ore grinding adopts is rod iron or steel section or steel ball.
4. medium tin ore sub-prime classification and sorting technique according to claim 3, is characterized in that: the milling medium that described ore grinding adopts is steel section.
5. medium tin ore sub-prime classification and sorting technique according to claim 4, it is characterized in that: the grinding particle size of described milling medium is-60 orders, content is 75% ~ 80%.
6. medium tin ore sub-prime classification and sorting technique according to claim 3, it is characterized in that: the grinding particle size of described milling medium is-60 orders, content is 75% ~ 80%.
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| CN103816989B (en) * | 2014-02-18 | 2016-08-17 | 云南锡业集团有限责任公司研究设计院 | A kind of Tin concentrate arsenic removal, the ore-dressing technique of sulfur |
| CN105032638A (en) * | 2015-06-30 | 2015-11-11 | 广西华锡集团股份有限公司车河选矿厂 | Desliming method used in fine cassiterite beneficiation |
| CN109550588B (en) * | 2018-10-26 | 2020-10-23 | 山东黄金集团烟台设计研究工程有限公司 | Mineral processing technology for improving mineral processing, grinding and grading efficiency and grading index of ore |
| CN109847924B (en) * | 2019-03-07 | 2020-07-28 | 昆明理工大学 | Beneficiation method for coarse-grained cassiterite in tin-containing polymetallic sulfide ore |
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| CN103041911A (en) * | 2013-01-11 | 2013-04-17 | 武汉理工大学 | Quality classifying and grading process for mineral separation and grinding |
| CN103182344A (en) * | 2011-12-30 | 2013-07-03 | 北京有色金属研究总院 | Ore dressing combination process for processing high-slime lead-zinc oxide and sulfide mixed ore |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3642464A (en) * | 1968-12-09 | 1972-02-15 | Univ Minnesota | Tin ore treating process |
| CN101058082A (en) * | 2007-05-31 | 2007-10-24 | 中国铝业股份有限公司 | Mine milling method for improving particles size distribution of bauxite mine milling products |
| CN101797531A (en) * | 2010-03-23 | 2010-08-11 | 云南锡业集团（控股）有限责任公司 | Method for recovering valuable metal mineral in zinc tailing |
| CN103182344A (en) * | 2011-12-30 | 2013-07-03 | 北京有色金属研究总院 | Ore dressing combination process for processing high-slime lead-zinc oxide and sulfide mixed ore |
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Effective date of registration: 20200901 Address after: Office building of Tongkeng Mine, Dachang Town, Nandan county, Hechi City, Guangxi Zhuang Autonomous Region Patentee after: Tongkeng mining branch of Guangxi Huaxi Mining Co., Ltd Address before: 547204, the Guangxi Zhuang Autonomous Region, Hechi, Nandan County town of car, Guangxi Hua Tin Group, Limited by Share Ltd car river concentrator Patentee before: CHEHE DRESSING PLANT OF CHINA-TIN GROUP Co.,Ltd. |