CN104437827A - Specularite dust ore dressing technology - Google Patents
Specularite dust ore dressing technology Download PDFInfo
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- CN104437827A CN104437827A CN201410467518.6A CN201410467518A CN104437827A CN 104437827 A CN104437827 A CN 104437827A CN 201410467518 A CN201410467518 A CN 201410467518A CN 104437827 A CN104437827 A CN 104437827A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
Abstract
The invention belongs to the technical field of ore dressing and particularly relates to a specularite dust ore dressing technology. The specularite dust ore dressing technology is characterized by comprising an ore grinding and grading system and a magnetic separation and dressing system. The grade of input raw ore is 33%, and the granularity is 0-15 mm. The specularite dust ore dressing technology comprises specific steps that firstly, specularite dust ore passes through two segments of continuous closed circuits for grinding until specularite is dissociated from gangue monomers, wherein the ball mill-cyclone-fine screen closed circuit is adopted for each segment of ore grinding; the products of which the grading size is 0.074 mm, the grade is 33% and the productivity is 100% in the two segments of closed circuits for grinding are fed into a medium-intensity magnetic separator, a roughing vertical-ring high-intensity magnetic separator, a concentration vertical-ring high-intensity magnetic separator, a roughing flat-ring high-intensity magnetic separator, a concentration vertical-ring high-intensity magnetic separator and two segments of scavenging flat-ring high-intensity magnetic separators for magnetic separation. The grade of final iron ore concentrate can be improved to 50%-52%, and the recovery rate can be increased to 70%-72%. Accordingly, economic benefits of a dressing plant are greatly increased, and the loss of iron resources is lowered.
Description
Technical field
The invention belongs to iron ore dressing technical field, particularly a kind of speculum iron fine ore sorting process.
Background technology
China's Gansu the Jiayu Pass area is contained abundant spiegel ore, and this area's ore industrial type is mainly spiegel ore, speculum iron siderite mixed ore and speculum iron limonite mixed ore.Speculum iron and limonite are the one of bloodstone, have weak magnetic, are directly selected in, and need higher field intensity could be sorted out by the method for magnetic separation.For sorting speculum iron, the method of the degree of oxidation of usual employing reduction roasting reduction iron in ore mineral increases the magnetic of speculum iron, and then carrying out sorting speculum iron by the method for low intensity magnetic separation, the concentrate grade of speculum iron can be brought up to about 60% by this method, and the rate of recovery can reach 80%.But because the fine ore hole of the 0-15mm after speculum iron fragmentation is few, reduction roasting can not be used for, so this part speculum iron is not selected in as barren rock process mostly, even if the grade of selected final iron ore concentrate also only has 45%-47%, the rate of recovery is generally lower than 60%, grade is low, and the rate of recovery is low, deficiency in economic performance.Institute is necessary that developing one effectively can sort 0-15mm speculum iron fine ore, improves a kind of speculum iron fine ore sorting process of final iron concentrate grade and the rate of recovery.
Summary of the invention
The object of this invention is to provide one effectively to sort speculum iron fine ore, can the final iron concentrate grade of larger raising and the rate of recovery, increase a kind of speculum iron fine ore sorting process selecting factory's benefit.
The object of the invention is to be realized by following technical proposals:
Of the present invention
onekind of speculum iron fine ore sorting process, is characterized in that: comprise grinding classification system and magnetic separation sorts system, and enter to grind head grade 33%, granularity is 0-15mm, and concrete steps are as follows:
A, speculum iron fine ore are first directly ground to speculum iron and gangue monomer dissociation through two sections of continuous closed circuit grindings; Every section of ore grinding all adopts ball milling-cyclone-dusting cover closed circuit, and the grading sifter partition size in two sections of closed circuit grindings is 0.074mm;
One section of cyclone overflow fineness during first paragraph ball milling-cyclone-dusting cover I is closed circuit is-0.074mm content 55%-60%, one section of cyclone overflow feed one section of dusting cover, I, one section of dusting cover I productive rate be 40% oversize feed the closed circuit cyclone of second segment ball milling-cyclone-dusting cover II;
Two sections of cyclone overflow fineness during second segment ball milling-cyclone-dusting cover II is closed circuit are-0.074mm content 75%-80%, two sections of cyclone overflows feed two sections of dusting covers II, two sections of dusting cover II productive rates be 23% oversize return second segment cyclone, one section of dusting cover undersize and two sections of dusting cover II undersizes of-0.074mm merge into grade 33%, and the product of productive rate 100% feeds the middle magnetic separator that magnetic separation sorts system;
B, grade 32.7%, the middle magnetic separator mine tailing of the rate of recovery 98% feeds roughly selects the strong magnetic machine of vertical ring;
C, grade 26%, the mine tailing roughly selecting the strong magnetic machine of vertical ring of the rate of recovery 57% feeds thickness grading cyclone; The P80=60 micron of thickness grading cyclone, the underflow coarse fraction product of the rate of recovery 18% feeds two sections and scans the strong magnetic machine of vertical ring continuously; The P80=28 micron of thickness grading cyclone, the overflow fine fraction product of the rate of recovery 39% feeds roughly selects the strong magnetic machine of flat ring;
D, grade 40%, the concentrate roughly selecting flat ring strong magnetic machine of the rate of recovery 12% feeds the strong magnetic machine of selected vertical ring, grade 32%, the mine tailing of the strong magnetic machine of selected vertical ring of the rate of recovery 8% returns roughly selects Horizontal ring high intensity magnetic separator, grade 25%, the mine tailing roughly selecting flat ring strong magnetic machine of the rate of recovery 35% feeds two sections and scans the strong magnetic machine of flat ring continuously;
E, grade are 42%, scan flat ring strong magnetic machine and two sections of comprehensive concentrate scanning flat ring strong magnetic machine turn back to the strong magnetic machine of selected vertical ring for one section of the rate of recovery 27%;
F, grade are 53%, the middle magnetic separator concentrate of the rate of recovery 2%, grade are 52%, the concentrate roughly selecting the strong magnetic machine of vertical ring of the rate of recovery 41%, grade are 44%, the comprehensive concentrate that two sections of continuous vertical rings of rate of recovery 14%-15% are scanned and grade are that the concentrate of the selected Verticle ring high intensity magnetic separator of 49%, rate of recovery 12%-13% forms final comprehensive iron ore concentrate jointly; Two sweep the mine tailing that vertical ring strong magnetic machine and two puts down ring strong magnetic machine forms comprehensive mine tailing;
G, described comprehensive iron concentrate grade are 50-52%, and the rate of recovery reaches 70%-72%; Comprehensive tailings grade is 16%-20%.
Described roughly selects the two-layer ring that Horizontal ring high intensity magnetic separator separation ring is upper and lower arranged concentric, and double-layer separate ring selection all carries out roughly selecting operation.
Described Horizontal ring high intensity magnetic separator separation ring of scanning is also the two-layer ring of upper and lower arranged concentric, and double-layer separate ring selection respectively performs one section and scans operation, and lower floor's ring field intensity is higher than upper strata ring field intensity.
Advantage of the present invention is:
1) speculum iron fine ore is first directly ground to speculum iron and gangue monomer dissociation through two sections of continuous closed circuit grindings by technique of the present invention, it is weak that this mode avoids speculum iron magnetic, fully do not dissociate with regard to the larger situation of iron loss during sorting iron, source ensure that the higher recovery of iron;
2) technique every section ore grinding of the present invention all adopts ball milling-cyclone-dusting cover closed circuit, and classification adopts gravity and the combined and staged mode of granularity.The preliminary gravity classification of this mode cyclone, the not only large small investment for the treatment of capacity, and underflow density directly can meet the requirement of this section of ball mill concentration for the treatment of; The control undersize degree that dusting cover Inspection graduation energy is strict, effectiveness of classification is high, for hypomere operation creates favourable granularity condition;
3) technique of the present invention, the mine tailing roughly selecting the strong magnetic machine of vertical ring feeds thickness grading cyclone, and coarse fraction sorts system and adopts two sections to scan the strong magnetic technique of vertical ring continuously, and fine fraction sorts employing and roughly selects the strong magnetic of flat ring-strong magnetic of selected vertical ring-scan the strong magnetic technique of flat ring.The method of this preparation of sized raw coal make use of vertical ring price fully lower than flat ring, field intensity is applicable to lower than flat ring the feature reclaiming the higher coarse fraction iron ore concentrate of magnetic, and though flat ring price is higher than vertical ring, but field intensity is also applicable to higher than vertical ring the feature reclaiming fine fraction iron ore concentrate, be conducive to the grade and the rate of recovery that improve final iron ore concentrate, increase and select factory's benefit;
4) technique of the present invention, scanning Horizontal ring high intensity magnetic separator separation ring is also the two-layer ring of upper and lower arranged concentric, and double-layer separate ring selection respectively performs one section and scans operation, and lower floor's ring field intensity is higher than upper strata ring field intensity, a kind of equipment completes two sections and scans operation, is conducive to reduction equipment and capital expenditure;
5) technique of the present invention, the grade of final iron ore concentrate can bring up to 50-52%, and the rate of recovery can bring up to 70%-72%, adds the economic benefit in ore dressing plant greatly, reduces the loss of iron resource.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Detailed description of the invention
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing:
As shown in Figure 1, of the present invention
onekind of speculum iron fine ore sorting process, is characterized in that: comprise grinding classification system and magnetic separation sorts system, and enter to grind head grade 33%, granularity is 0-15mm, and concrete steps are as follows:
A, speculum iron fine ore are first directly ground to speculum iron and gangue monomer dissociation through two sections of continuous closed circuit grindings; Every section of ore grinding all adopts ball milling-cyclone-dusting cover closed circuit, and the grading sifter partition size in two sections of closed circuit grindings is 0.074mm;
One section of cyclone overflow fineness during first paragraph ball milling-cyclone-dusting cover I is closed circuit is-0.074mm content 55%-60%, one section of cyclone overflow feed one section of dusting cover, I, one section of dusting cover I productive rate be 40% oversize feed the closed circuit cyclone of second segment ball milling-cyclone-dusting cover II;
One section of described dusting cover adopts five road eclipsed form high frequency fine screen machines.Its five roads eclipsed form high frequency fine screen machine up and down totally five plies arrange, sieve side is side by side corresponding arranges 5 feed ports, greatly can improve the disposal ability of sieve like this;
Two sections of cyclone overflow fineness during second segment ball milling-cyclone-dusting cover II is closed circuit are-0.074mm content 75%-80%, two sections of cyclone overflows feed two sections of dusting covers II, two sections of dusting cover II productive rates be 23% oversize return second segment cyclone, one section of dusting cover undersize and two sections of dusting cover II undersizes of-0.074mm merge into grade 33%, and the product of productive rate 100% feeds the middle magnetic separator that magnetic separation sorts system;
Speculum iron fine ore is first directly ground to speculum iron and gangue monomer dissociation through two sections of continuous closed circuit grindings by technique of the present invention, it is weak that this mode avoids speculum iron magnetic, fully do not dissociate with regard to the larger situation of iron loss during sorting iron, source ensure that the higher recovery of iron, for hypomere magnetic concentration working creates favourable granularity condition;
B, grade 32.7%, the middle magnetic separator mine tailing of the rate of recovery 98% feeds roughly selects the strong magnetic machine of vertical ring;
C, grade 26%, the mine tailing roughly selecting the strong magnetic machine of vertical ring of the rate of recovery 57% feeds thickness grading cyclone; The P80=60 micron of thickness grading cyclone, the underflow coarse fraction product of the rate of recovery 18% feeds two sections and scans the strong magnetic machine of vertical ring continuously; The P80=28 micron of thickness grading cyclone, the overflow fine fraction product of the rate of recovery 39% feeds roughly selects the strong magnetic machine of flat ring;
D, grade 40%, the concentrate roughly selecting flat ring strong magnetic machine of the rate of recovery 12% feeds the strong magnetic machine of selected vertical ring, grade 32%, the mine tailing of the strong magnetic machine of selected vertical ring of the rate of recovery 8% returns roughly selects Horizontal ring high intensity magnetic separator, grade 25%, the mine tailing roughly selecting flat ring strong magnetic machine of the rate of recovery 35% feeds two sections and scans the strong magnetic machine of flat ring continuously;
E, grade are 42%, scan flat ring strong magnetic machine and two sections of comprehensive concentrate scanning flat ring strong magnetic machine turn back to the strong magnetic machine of selected vertical ring for one section of the rate of recovery 27%;
F, grade are 53%, the middle magnetic separator concentrate of the rate of recovery 2%, grade are 52%, the concentrate roughly selecting the strong magnetic machine of vertical ring of the rate of recovery 41%, grade are 44%, the comprehensive concentrate that two sections of continuous vertical rings of rate of recovery 14%-15% are scanned and grade are that the concentrate of the selected Verticle ring high intensity magnetic separator of 49%, rate of recovery 12%-13% forms final comprehensive iron ore concentrate jointly; Two sweep the mine tailing that vertical ring strong magnetic machine and two puts down ring strong magnetic machine forms comprehensive mine tailing;
G, described comprehensive iron concentrate grade are 50-52%, and the rate of recovery reaches 70%-72%; Comprehensive tailings grade is 16%-20%.
Preferably, of the present inventionly roughly select the two-layer ring that Horizontal ring high intensity magnetic separator separation ring is upper and lower arranged concentric, double-layer separate ring selection all carries out roughly selecting operation.
Preferably, of the present invention to scan Horizontal ring high intensity magnetic separator separation ring be also the two-layer ring of upper and lower arranged concentric, and double-layer separate ring selection respectively performs one section and scans operation, and lower floor's ring field intensity is higher than upper strata ring field intensity.Adopt a kind of equipment to complete two sections and scan operation, be conducive to reduction equipment and capital expenditure.
Technique of the present invention, the grade of final iron ore concentrate can bring up to 50-52%, and the rate of recovery can bring up to 70%-72%, adds the economic benefit in ore dressing plant greatly, reduces the loss of iron resource.
Claims (4)
1.
onekind of speculum iron fine ore sorting process, is characterized in that comprising grinding classification system and magnetic separation sorts system, and enter to grind head grade 33%, granularity is 0-15mm, and concrete steps are as follows:
A, speculum iron fine ore are first directly ground to speculum iron and gangue monomer dissociation through two sections of continuous closed circuit grindings; Every section of ore grinding all adopts ball milling-cyclone-dusting cover closed circuit, and the grading sifter partition size in two sections of closed circuit grindings is 0.074mm;
One section of cyclone overflow fineness during first paragraph ball milling-cyclone-dusting cover I is closed circuit is-0.074mm content 55%-60%, one section of cyclone overflow feed one section of dusting cover, I, one section of dusting cover I productive rate be 40% oversize feed the closed circuit cyclone of second segment ball milling-cyclone-dusting cover II;
Two sections of cyclone overflow fineness during second segment ball milling-cyclone-dusting cover II is closed circuit are-0.074mm content 75%-80%, two sections of cyclone overflows feed two sections of dusting covers II, two sections of dusting cover II productive rates be 23% oversize return second segment cyclone, one section of dusting cover undersize and two sections of dusting cover II undersizes of-0.074mm merge into grade 33%, and the product of productive rate 100% feeds the middle magnetic separator that magnetic separation sorts system;
B, grade 32.7%, the middle magnetic separator mine tailing of the rate of recovery 98% feeds roughly selects the strong magnetic machine of vertical ring;
C, grade 26%, the mine tailing roughly selecting the strong magnetic machine of vertical ring of the rate of recovery 57% feeds thickness grading cyclone; The P80=60 micron of thickness grading cyclone, the underflow coarse fraction product of the rate of recovery 18% feeds two sections and scans the strong magnetic machine of vertical ring continuously; The P80=28 micron of thickness grading cyclone, the overflow fine fraction product of the rate of recovery 39% feeds roughly selects the strong magnetic machine of flat ring;
D, grade 40%, the concentrate roughly selecting flat ring strong magnetic machine of the rate of recovery 12% feeds the strong magnetic machine of selected vertical ring, grade 32%, the mine tailing of the strong magnetic machine of selected vertical ring of the rate of recovery 8% returns roughly selects Horizontal ring high intensity magnetic separator, grade 25%, the mine tailing roughly selecting flat ring strong magnetic machine of the rate of recovery 35% feeds two sections and scans the strong magnetic machine of flat ring continuously;
E, grade are 42%, scan flat ring strong magnetic machine and two sections of comprehensive concentrate scanning flat ring strong magnetic machine turn back to the strong magnetic machine of selected vertical ring for one section of the rate of recovery 27%;
F, grade are 53%, the middle magnetic separator concentrate of the rate of recovery 2%, grade are 52%, the concentrate roughly selecting the strong magnetic machine of vertical ring of the rate of recovery 41%, grade are 44%, the comprehensive concentrate that two sections of continuous vertical rings of rate of recovery 14%-15% are scanned and grade are that the concentrate of the selected Verticle ring high intensity magnetic separator of 49%, rate of recovery 12%-13% forms final comprehensive iron ore concentrate jointly; Two sweep the mine tailing that vertical ring strong magnetic machine and two puts down ring strong magnetic machine forms comprehensive mine tailing;
G, described comprehensive iron concentrate grade are 50-52%, and the rate of recovery reaches 70%-72%; Comprehensive tailings grade is 16%-20%.
2. speculum iron fine ore sorting process according to claim 1, it is characterized in that described roughly selecting the two-layer ring that Horizontal ring high intensity magnetic separator separation ring is upper and lower arranged concentric, double-layer separate ring selection all carries out roughly selecting operation.
3. speculum iron fine ore sorting process according to claim 1, it is characterized in that described Horizontal ring high intensity magnetic separator separation ring of scanning also is the two-layer ring of upper and lower arranged concentric, double-layer separate ring selection respectively performs one section and scans operation, and lower floor's ring field intensity is higher than upper strata ring field intensity.
4. speculum iron fine ore sorting process according to claim 1, is characterized in that one section of described dusting cover adopts five road eclipsed form high frequency fine screen machines.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233977A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Tailing recovery process adopting magnetic separation-circulating roasting-regrinding and magnetic separation method |
| CN105233974A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Fine grinding magnetic separation-roasting-regrinding magnetic separation tailing recovery process |
| CN105233976A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Tailing recovery process adopting preconcentration-roasting-regrinding and magnetic separation method |
| CN105833987A (en) * | 2016-05-27 | 2016-08-10 | 泗水惠丰农业开发工程有限公司 | Shaping technology in mixed mineral aggregate screen |
| CN106398319A (en) * | 2016-08-31 | 2017-02-15 | 安徽纽亚达科技有限责任公司 | Dry processing method of mica iron oxide |
| CN107552220A (en) * | 2017-08-30 | 2018-01-09 | 玉溪大红山矿业有限公司 | A kind of safe screen ore dressing optimize technique for effectively improving concentrate yield |
| CN107995909A (en) * | 2015-04-27 | 2018-05-04 | 尤尼威蒂恩技术有限责任公司 | Double (aminophenyl phenol) ligands and transistion metal compound prepared therefrom |
| CN108187878A (en) * | 2017-12-29 | 2018-06-22 | 潘自维 | A kind of one and half closed circuit grinding grading techniques |
| CN109550585A (en) * | 2018-10-29 | 2019-04-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A method of it improving complicated difficult and selects the ferric oxide ore rate of recovery |
| CN109894256A (en) * | 2017-12-11 | 2019-06-18 | 南京梅山冶金发展有限公司 | Low-grade iron ore powder mentions iron and drops miscellaneous beneficiation method |
| CN110538719A (en) * | 2019-08-20 | 2019-12-06 | 湖南柿竹园有色金属有限责任公司 | method for improving quality of iron ore concentrate |
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| CN105233976A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Tailing recovery process adopting preconcentration-roasting-regrinding and magnetic separation method |
| CN105233977A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Tailing recovery process adopting magnetic separation-circulating roasting-regrinding and magnetic separation method |
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| CN105233974B (en) * | 2015-11-05 | 2017-07-28 | 鞍钢集团矿业有限公司 | Magnetic separation recovery mine tailing technique is regrinded in fine grinding magnetic separation roasting |
| CN105833987A (en) * | 2016-05-27 | 2016-08-10 | 泗水惠丰农业开发工程有限公司 | Shaping technology in mixed mineral aggregate screen |
| CN106398319A (en) * | 2016-08-31 | 2017-02-15 | 安徽纽亚达科技有限责任公司 | Dry processing method of mica iron oxide |
| CN107552220A (en) * | 2017-08-30 | 2018-01-09 | 玉溪大红山矿业有限公司 | A kind of safe screen ore dressing optimize technique for effectively improving concentrate yield |
| CN109894256A (en) * | 2017-12-11 | 2019-06-18 | 南京梅山冶金发展有限公司 | Low-grade iron ore powder mentions iron and drops miscellaneous beneficiation method |
| CN108187878A (en) * | 2017-12-29 | 2018-06-22 | 潘自维 | A kind of one and half closed circuit grinding grading techniques |
| CN108187878B (en) * | 2017-12-29 | 2021-02-02 | 中业纳米科技(烟台)有限公司 | One-section semi-closed-circuit ore grinding and grading process |
| CN109550585A (en) * | 2018-10-29 | 2019-04-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A method of it improving complicated difficult and selects the ferric oxide ore rate of recovery |
| CN110538719A (en) * | 2019-08-20 | 2019-12-06 | 湖南柿竹园有色金属有限责任公司 | method for improving quality of iron ore concentrate |
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