CN101927236B - Lean hematite technology combining dressing-fine screening and shaking table gravity separation - Google Patents
Lean hematite technology combining dressing-fine screening and shaking table gravity separation Download PDFInfo
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- CN101927236B CN101927236B CN2009100121950A CN200910012195A CN101927236B CN 101927236 B CN101927236 B CN 101927236B CN 2009100121950 A CN2009100121950 A CN 2009100121950A CN 200910012195 A CN200910012195 A CN 200910012195A CN 101927236 B CN101927236 B CN 101927236B
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Abstract
The invention relates to a lean hematite technology combining dressing-fine screening and shaking table gravity separation. The technology is characterized in that a high frequency vibrating fine screen is used to check and grade the grinding product and the gravity separation device and technology are adopted to perform the upgrading production flow. The technology mainly comprises the following steps: the high frequency vibrating fine screen is used to check and grade the grinding product, and a first-stage roughing spiral launder, a first-stage concentration spiral launder, a second-stage concentration spiral launder, a scavenging spiral launder, a roughing shaking table and a concentration shaking table are combined to complete the entire gravity separation process. The high frequency vibrating fine screen with (0.1-0.15)*(0.1-0.15)mm of sieve pores which is a metal wire mesh or polyurethane mesh, is used for screening; the above spiral launders are used to concentrate 30-100 microns of hematite and obtain hematite concentrate with coarse particles; and 0-30 microns of fine hematite particles which are separated by the first-stage roughing fine-grain slimmer spiral launder and the first-stage concentration fine-grain slimmer spiral launder are used to prepare hematite concentrate with fine particles. The technology is suitable for the hematite concentrator with small production scale.
Description
Technical field
The present invention relates to a kind of iron ore dressing technical field, particularly a kind of employing high frequency vibrating dusting cover is checked classification to ore milling product, the lean hematite technology combining dressing-fine screening and shaking table gravity separation that all adopts gravitational separation equipment to sort.
Background technology
At present; At home and abroad in the technology of fine fraction lean hematite ore dressing; The ore-dressing technique of China Anshan iron and steel plant mining company lean hematite ore is the most representative; The lean hematite ore-dressing technique that it adopts is stage grinding, cyclone thickness grading, the anti-floating process flow of gravity treatment-magnetic separation-anion, utilizes gravity treatment, floatation process and equipment to sort out the final concentrate of concentrate grade 67.5%, and magnetic, strong magnetic high gradient magnetic separator are thrown tail and desliming in the utilization; Obtain good quality index and higher metal recovery rate, its technology is in world lead level.But; Magnetic during the stage grinding that Anshan iron and steel plant mining company adopts, cyclone thickness grading, gravity treatment-magnetic separation-anion reverse floatation technological process are adopted, high intensity magnetic separation equipment are as throwing tail equipment, anion reverse floatation upgrading, process for discarding tailings and the equipment as the fine fraction bloodstone; Therefore; Technological process requires investment big, and management expectancy is high, relatively is suitable for large and medium-sized enterprise and adopts.And the environmental protection requirement that the ore dressing plant is produced high, do not allow to adopt floatation process, ore dressing plant that the scale of founding the factory is less, this technological process just can not be used.
Summary of the invention
The objective of the invention is high for production environment protection is required, do not allow to adopt floatation process, ore dressing plant that the scale of founding the factory is less; Design a kind of new technology that does not adopt floatation process, do not use chemicals treatment fine fraction bloodstone, i.e. lean hematite technology combining dressing-fine screening and shaking table gravity separation.
The objective of the invention is to realize through following technical proposals:
A kind of lean hematite technology combining dressing-fine screening and shaking table gravity separation of the present invention; It is characterized in that utilizing high frequency vibrating dusting cover that ore milling product is checked classification, roughly selected spiral sluice, selected spiral sluice, scans spiral sluice, roughing table, concentrating table and be combined into the full re-election mineral processing circuit, concrete steps are following:
(1) lean hematite ore carries out the primary grinding operation;
(2) product of primary grinding operation gets into graded operation, and the sand return product of telling returns the primary grinding operation, and the overflow product of telling gets into the operation of high frequency vibrating dusting cover;
(3) oversize of high frequency vibrating dusting cover gets into and concentrates the desliming operation, and the undersize of high frequency vibrating dusting cover gets into roughly selects the spiral sluice operation;
(4) the sand setting product of concentrated desliming operation gets into the secondary grinding operation, and the overflow product that concentrates the desliming operation gets into the roughing table operation;
(5) product of secondary grinding operation turns back to the operation of high frequency vibrating dusting cover;
(6) the concentrate product of roughly selecting the spiral sluice operation gets into one section selected spiral sluice operation, and the product from failing of roughly selecting the spiral sluice operation gets into scans the spiral sluice operation;
The concentrate product of (7) one sections selected spiral sluice operations gets into two sections selected spiral sluice operations, and the product from failing of one section selected spiral sluice operation turns back to roughly selects the spiral sluice operation;
The concentrate product of (8) two sections selected spiral sluice operations is the qualified concentrate containing product, and the product from failing of two sections selected spiral sluice operations returns one section selected spiral sluice operation;
(9) the concentrate product of scanning the spiral sluice operation turns back to roughly selects the spiral sluice operation, and the limit tail product of scanning the spiral sluice operation gets into the roughing table operation, and the product from failing of scanning the spiral sluice operation is that true tailings is abandoned;
(10) the concentrate product of roughing table operation is a qualified concentrate containing, and the middle mineral products of roughing table operation get into the concentrating table operation, and the product from failing of roughing table operation is that true tailings is abandoned;
(11) the concentrate product of concentrating table operation is a qualified concentrate containing, and the product from failing of concentrating table operation turns back to the roughing table operation.
The screen cloth of said high frequency vibrating dusting cover is woven wire or polyurethane screen cloth, and the sieve aperture of this high frequency vibrating dusting cover is a square opening, and size range is 0.1～0.15 * 0.1～0.15mm, and screen size requires decision by original ore property and end product quality.
The overflow product that described graded operation is told; Its percentage by weight is 40～45%, and granularity-200 order grade percentage by weight is 45～55%, and grade is 28～36%; Get into the operation of high frequency vibrating dusting cover; Oversize returns the operation of high frequency vibrating dusting cover through concentrating desliming behind the secondary grinding, undersize gets into roughly selects the spiral sluice operation.
The undersize of described high frequency vibrating dusting cover, its percentage by weight are 40～45%, and granularity-200 order grade percentage by weight is 85～95%; Grade is 28～36%, through roughly selecting spiral sluice operation, one section selected spiral sluice operation; Two sections selected spiral sluice operations; Scan the spiral sluice operation for one section, sorting out grade is 65～67% coarse fraction gravity concentrates, abandons grade and be 13～17% coarse fraction mine tailing.
Fine fraction product after the described coarse grain gravity treatment; Its percentage by weight is 15～25%, and granularity-200 order grade percentage by weight is 90～95%, and grade is 20～35%; Get into the roughing table operation; The concentrating table operation, selecting grade is 63～65% fine fraction gravity concentrates, abandons grade and be 15～20% fine fraction gravity tailings.
Lean hematite technology combining dressing-fine screening and shaking table gravity separation characteristics of the present invention:
(1) stage grinding, through twice ball mill with the specification requirement of ore ore grinding to ore-dressing practice to product granularity;
(2) utilize the inspection graded operation of high frequency vibrating dusting cover, the final products granularity of ore grinding is carried out strictness control check on as secondary grinding;
(3) utilize that one roughing, twice are selected, the once purging selection spiral sluice carries out preferential coarse fraction to the final products of ore grinding and sorts, and obtains a large amount of bloodstone coarse fraction concentrate, abandons a large amount of coarse fraction mine tailings simultaneously;
(4) the fine fraction mineral after spiral sluice is handled utilize slimer to carry out one roughing, primary cleaning, obtain the fine fraction hematite concentrate, abandon the fine fraction mine tailing simultaneously;
(5) sorting process all adopts gravitational separation equipment, carefully disposes preparation equipment targetedly after elder generation is thick, obtains technique of preparing economic indicator preferably;
(6) this technology is applicable to the small-sized hematite separation factory that the mine production scale is less, is the excellent technology of small-sized bloodstone mine development.
Description of drawings
Fig. 1 is lean hematite dusting cover-table concentration process chart.
The specific embodiment
Given embodiment further specifies the specific embodiment of the present invention below in conjunction with accompanying drawing.
As shown in Figure 1; A kind of lean hematite technology combining dressing-fine screening and shaking table gravity separation of the present invention; It is characterized in that utilizing 6 pairs of ore milling products of high frequency vibrating dusting cover to check classification, roughly select spiral sluice 13, selected spiral sluice, scan spiral sluice 22, roughing table 26, concentrating table 30 and be combined into the full re-election mineral processing circuit, concrete steps are following:
(1) lean hematite ore 1 carries out primary grinding operation 2;
(2) product of primary grinding operation 2 gets into graded operation 3, and the sand return product of telling 4 returns primary grinding operation 2, and the overflow product of telling 5 gets into high frequency vibrating dusting cover operation 6;
(3) oversize 8 of high frequency vibrating dusting cover 6 gets into and concentrates desliming operation 9, and the undersize 7 of high frequency vibrating dusting cover 6 gets into roughly selects spiral sluice operation 13;
(4) the sand setting product 11 of concentrated desliming operation 9 gets into secondary grinding operations 12, and the overflow product 10 that concentrates the desliming operation gets into roughing table operations 26;
(5) product of secondary grinding operation 12 turns back to high frequency vibrating dusting cover operation 6;
(6) the concentrate product 15 of roughly selecting spiral sluice operation 13 gets into one section selected spiral sluice operation 16, and the product from failing 14 of roughly selecting the spiral sluice operation gets into scans spiral sluice operation 22;
The product from failing 17 of 19, one sections selected eddy flow grooves of concentrate product 18 two sections selected spiral sluice operations of entering operation 16 of (7) one sections selected spiral sluice operations 16 turns back to roughly selects spiral sluice operation 13;
The concentrate product 21 of (8) two sections selected spiral sluice operations 19 is the qualified concentrate containing product, and the product from failing 20 of two sections selected spiral sluice operations 19 returns one section selected spiral sluice operation 16;
(9) the concentrate product 23 of scanning spiral sluice operation 22 turns back to roughly selects spiral sluice operation 13, and the limit tail product 25 of scanning spiral sluice operation 22 gets into roughing table operations 26, scans the product from failing 24 of spiral sluice operation 22 and abandons for true tailings;
(10) the concentrate product 29 of roughing table operation 26 is a qualified concentrate containing, and the middle mineral products 28 of roughing table operation get into concentrating table operation 30, and the product from failing 27 of roughing table operation is abandoned for true tailings,
(11) the concentrate product 32 of concentrating table operation 30 is a qualified concentrate containing, and the product from failing 31 of concentrating table operation turns back to roughing table operation 26.
The screen cloth of said high frequency vibrating dusting cover 6 is woven wire or polyurethane screen cloth, and the sieve aperture of this high frequency vibrating dusting cover 6 is a square opening, and size range is 0.1～0.15 * 0.1～0.15mm, and screen size requires decision by original ore property and end product quality.
The overflow product 5 that described graded operation 3 is told; Its percentage by weight is 40～45%, and granularity-200 order grade percentage by weight is 45～55%, and grade is 28～36%; Get into high frequency vibrating dusting cover operation 6; Oversize 8 returns high frequency vibrating dusting cover operation 6 through concentrating desliming operation 9 after the secondary grinding operation 12, undersize 7 gets into roughly selects spiral sluice operation 13.
The undersize 7 of described high frequency vibrating dusting cover, its percentage by weight are 40～45%, and granularity-200 order grade percentage by weight is 85～95%; Grade is 28～36%, through roughly selecting 13, one sections selected spiral sluice operations 16 of spiral sluice operation; Two sections selected spiral sluice operations 19; Scan spiral sluice operation 22 for one section, sorting out grade is 65～67% coarse fraction gravity concentrates, abandons grade and be 13～17% coarse fraction mine tailing.
Fine fraction product after the described coarse grain gravity treatment; Its percentage by weight is 15～25%, and granularity-200 order grade percentage by weight is 90～95%, and grade is 20～35%; Get into roughing table operation 26; Concentrating table operation 30, selecting grade is 63～65% fine fraction gravity concentrates, abandons grade and be 15～20% fine fraction gravity tailings.
Lean hematite technology combining dressing-fine screening and shaking table gravity separation characteristics of the present invention:
(1) stage grinding, through two sections ball mills with the specification requirement of ore ore grinding to ore-dressing practice to product granularity;
(2) utilize the inspection graded operation of high frequency vibrating dusting cover, the final products granularity of ore grinding is carried out strictness control check on as secondary grinding;
(3) utilize that one roughing, twice are selected, the once purging selection spiral sluice carries out preferential coarse fraction to the final products of ore grinding and sorts, and obtains a large amount of bloodstone coarse fraction concentrate, abandons a large amount of coarse fraction mine tailings simultaneously;
(4) the fine fraction mineral after spiral sluice is handled utilize slimer to carry out one roughing, primary cleaning, obtain the fine fraction hematite concentrate, abandon the fine fraction mine tailing simultaneously;
(5) sorting process all adopts gravitational separation equipment, carefully disposes preparation equipment targetedly after elder generation is thick, obtains technique of preparing economic indicator preferably;
(6) this technology is applicable to the small-sized hematite separation factory that the mine production scale is less, is the excellent technology of small-sized bloodstone mine development.
Claims (5)
1. lean hematite technology combining dressing-fine screening and shaking table gravity separation; It is characterized in that utilizing high frequency vibrating dusting cover that ore milling product is checked that classification, one section roughly select spiral sluice, two sections selected spiral sluices, one section and scan spiral sluice, one section roughing table, one section concentrating table and be combined into the full re-election mineral processing circuit, concrete steps are following:
(1) lean hematite ore carries out the primary grinding operation,
(2) product of primary grinding operation gets into graded operation, and the sand return product of telling returns the primary grinding operation, and the overflow product of telling gets into the operation of high frequency vibrating dusting cover,
(3) oversize of high frequency vibrating dusting cover gets into and concentrates the desliming operation, and the undersize of high frequency vibrating dusting cover gets into roughly selects the spiral sluice operation,
(4) the sand setting product of concentrated desliming operation gets into the secondary grinding operation, and the overflow product that concentrates the desliming operation gets into the roughing table operation,
(5) product of secondary grinding operation turns back to the operation of high frequency vibrating dusting cover,
(6) the concentrate product of roughly selecting the spiral sluice operation gets into one section selected spiral sluice operation, and the product from failing of roughly selecting the spiral sluice operation gets into scans the spiral sluice operation,
The concentrate product of (7) one sections selected spiral sluice operations gets into two sections selected spiral sluice operations, and the product from failing of one section selected spiral sluice operation turns back to roughly selects the spiral sluice operation,
The concentrate product of (8) two sections selected spiral sluice operations is the qualified concentrate containing product, and the product from failing of two sections selected spiral sluice operations returns one section selected spiral sluice operation,
(9) the concentrate product of scanning the spiral sluice operation turns back to roughly selects the spiral sluice operation, and the limit tail product of scanning the spiral sluice operation gets into the roughing table operation, and the product from failing of scanning the spiral sluice operation is that true tailings is abandoned,
(10) the concentrate product of roughing table operation is a qualified concentrate containing, and the middle mineral products of roughing table operation get into the concentrating table operation, and the product from failing of roughing table operation is that true tailings is abandoned,
(11) the concentrate product of concentrating table operation is a qualified concentrate containing, and the product from failing of concentrating table operation turns back to the roughing table operation.
2. lean hematite technology combining dressing-fine screening and shaking table gravity separation according to claim 1; The screen cloth that it is characterized in that said high frequency vibrating dusting cover is woven wire or polyurethane screen cloth; The sieve aperture of this high frequency vibrating dusting cover is a square opening, and size range is 0.1～0.15 * 0.1～0.15mm.
3. lean hematite technology combining dressing-fine screening and shaking table gravity separation according to claim 1 is characterized in that the overflow product that described graded operation is told, and its percentage by weight is 40～45%; Granularity-200 order grade percentage by weight is 45～55%; Grade is 28～36%, gets into the operation of high frequency vibrating dusting cover, and oversize is through concentrating the desliming operation; Return the operation of high frequency vibrating dusting cover after the secondary grinding operation, undersize gets into roughly selects the spiral sluice operation.
4. lean hematite technology combining dressing-fine screening and shaking table gravity separation according to claim 1 is characterized in that the undersize of described high frequency vibrating dusting cover, and its percentage by weight is 40～45%; Granularity-200 order grade percentage by weight is 85～95%; Grade is 28～36%, through roughly selecting spiral sluice operation, one section selected spiral sluice operation; Two sections selected spiral sluice operations; Scan the spiral sluice operation for one section, sorting out grade is 65～67% coarse fraction gravity concentrates, abandons grade and be 13～17% coarse fraction mine tailing.
5. lean hematite technology combining dressing-fine screening and shaking table gravity separation according to claim 4 is characterized in that the fine fraction product after the described coarse grain gravity treatment, and its percentage by weight is 15～25%; Granularity-200 order grade percentage by weight is 90～95%; Grade is 20～35%, gets into the roughing table operation, the concentrating table operation; Selecting grade is 63～65% fine fraction gravity concentrates, abandons grade and be 15～20% fine fraction gravity tailings.
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| CN2009100121950A CN101927236B (en) | 2009-06-24 | 2009-06-24 | Lean hematite technology combining dressing-fine screening and shaking table gravity separation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102836776B (en) * | 2011-06-21 | 2015-04-29 | 邵金堤 | Mineral separation production process technology |
| CN102962126A (en) * | 2012-11-23 | 2013-03-13 | 昆明钢铁集团有限责任公司 | Fine-grained weak magnetic iron ore strong magnetic separation tailings reelection process |
| CN105197970B (en) * | 2014-06-27 | 2017-02-22 | 沈阳铝镁设计研究院有限公司 | Method for improving two-stage decomposition effect |
| CN106944230B (en) * | 2017-04-07 | 2022-06-03 | 北京东方燕京工程技术有限责任公司 | Adjustable ore grinding process |
| CN109201322A (en) * | 2018-09-20 | 2019-01-15 | 鞍钢集团矿业有限公司 | A kind of sorting process of the hematite containing ferric carbonate |
| CN113731625A (en) * | 2021-08-19 | 2021-12-03 | 河南金源黄金矿业有限责任公司 | Low-grade ore dressing process |
| CN113941433B (en) * | 2021-10-14 | 2023-07-28 | 中钢集团马鞍山矿山研究总院股份有限公司 | Ore dressing method for cascade recovery and segmented tailing discarding of low-grade chromite |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2145909C1 (en) * | 1999-06-10 | 2000-02-27 | Всероссийский научно-исследовательский институт минерального сырья им.Н.М.Федоровского | Method of selection of technological scheme for processing mineral raw material |
| CN1049847C (en) * | 1995-04-25 | 2000-03-01 | 郑萍 | Gravity method for separation of zinc oxide ore |
| CN1133503C (en) * | 2000-10-29 | 2004-01-07 | 招远市夏甸金矿 | Dressing process for gold ore |
| CN101274301A (en) * | 2007-03-27 | 2008-10-01 | 鞍钢集团矿业公司 | Process of gravity separation, fine sieve and reconcentration for lean hematite |
| CN100435966C (en) * | 2006-12-08 | 2008-11-26 | 凌源市盛唐矿冶有限责任公司 | Method for separating non-magnetic iron mine by using property of specific gravity |
-
2009
- 2009-06-24 CN CN2009100121950A patent/CN101927236B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049847C (en) * | 1995-04-25 | 2000-03-01 | 郑萍 | Gravity method for separation of zinc oxide ore |
| RU2145909C1 (en) * | 1999-06-10 | 2000-02-27 | Всероссийский научно-исследовательский институт минерального сырья им.Н.М.Федоровского | Method of selection of technological scheme for processing mineral raw material |
| CN1133503C (en) * | 2000-10-29 | 2004-01-07 | 招远市夏甸金矿 | Dressing process for gold ore |
| CN100435966C (en) * | 2006-12-08 | 2008-11-26 | 凌源市盛唐矿冶有限责任公司 | Method for separating non-magnetic iron mine by using property of specific gravity |
| CN101274301A (en) * | 2007-03-27 | 2008-10-01 | 鞍钢集团矿业公司 | Process of gravity separation, fine sieve and reconcentration for lean hematite |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-193095A 2005.07.21 |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Angang Group Mine Company |