CN103447161A - Flocculation desliming and alkaline flotation method of high-ferrous ore fine particle products - Google Patents
Flocculation desliming and alkaline flotation method of high-ferrous ore fine particle products Download PDFInfo
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- CN103447161A CN103447161A CN2013103977983A CN201310397798A CN103447161A CN 103447161 A CN103447161 A CN 103447161A CN 2013103977983 A CN2013103977983 A CN 2013103977983A CN 201310397798 A CN201310397798 A CN 201310397798A CN 103447161 A CN103447161 A CN 103447161A
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Abstract
The invention relates to a flocculation desliming and alkaline flotation method of high-ferrous ore fine particle products. The method comprises the step that sorted materials of raw ore subjected to ore grinding is fed to a one-stage thickness grading whirlcone for grading operation. The method is characterized in that setting sand of the one-stage thickness grading whirlcone is fed to a reselection process for sorting, overflows of the one-stage thickness grading whirlcone are fed to a two-stage thickness grading whirlcone for sorting operation, graded settling sand of the two-stage thickness grading whirlcone is fed for acid direct flotation operation, overflows of the two-stage thickness grading whirlcone are fed to a tilting narrow flow grading machine for desliming grading operation, greater than 19mum of coarse particle products subjected to desliming grading by the tilting narrow flow grading machine and coarse finished ore A subjected to acid direct flotation are combined and are fed for sorting operation of the acid direct flotation, the once-coarsing once-refining twice-sweeping acid reverse flotation process sorting is carried out, acid reverse flotation finished ore and acid reverse flotation tailings are sorted. The method has the advantage that because the process is adopted, the technical index of the ore dressing of the high-ferrous ore fine particle products is greatly improved.
Description
Technical field
The invention belongs to the technique of preparing field, particularly a kind of high ferrous type ore particulate product Flocculation desliming, alkaline method for floating.
Background technology
For a long time, comprise bloodstone, magnetic iron ore, siderite, the ferrous type ore beneficiation of the height of the multiple iron mineral symbiosis such as limonite technical indicator is not high, its ore milling product fine fraction particularly, mostly adopt stage grinding, coarse and fine separation, gravity treatment-strong magnetic-reverse floatation process and Flocculation desliming reverse floatation process, the concrete technology flow process as shown in Figure 1, raw ore enters the closed circuit grinding of primary ball mill and scalping machine composition, classifier overflow becomes thick to the thickness grading cyclone classification, thin two kinds of materials, the coarse-grained material of cyclone enters the gravity treatment flow process and is sorted, thick material sorts with selected spiral chute through roughly selecting that to obtain the coarse grain qualified concentrate containing be final concentrate, through roughly selecting spiral chute, scan spiral chute and scan middle magnetic machine and sort that to obtain middle magnetic tail be that the heavy-tailed true tailings that becomes is abandoned, and the chats of gravity treatment flow process roughly selects the spiral chute chats, selected spiral chute mine tailing, scan the spiral chute concentrate and scan middle magnetic machine concentrate and merge the secondary grading machine that enters, the grader sand return is to secondary ball mill, secondary ball mill ore discharge and secondary grading machine overflow merging are back to the thickness grading cyclone to ore deposit.The fine of cyclone adopts weak, middle magnetic machine, pulsating high gradient magnetic separator with vertical ring desliming to throw tail, and its weak, middle magnetic essence and strong magnetic essence merge and enter after the reverse flotation work dosing sizes mixing, and sorting of carrying out that a thick essence, three sweeps obtains floating essence and floating tail.This technique, when ore magnetic content is high, is thrown tail few, and extreme poverty magnetic larger particles intergrowth easily enters flotation operation and causes concentrate grade to descend.When high containing siderite, because the material argillization seriously causes strong tail of high grade, metal loss is serious.Simultaneously, siderite is larger on flotation operation choosing minute impact, and chats falls groove, and index worsens, and has affected the benefit in ore dressing plant.
Summary of the invention
The purpose of this invention is to provide the ferrous type ore of a kind of height that can greatly promote high ferrous type ore ore grinding particulate product beneficiating technology index particulate product Flocculation desliming, alkaline method for floating.
The object of the present invention is achieved like this.
A kind of high ferrous type ore particulate product Flocculation desliming of the present invention, alkaline method for floating, comprise that raw ore feeds the operation of one section thickness grading cyclone classification through the selected material of ore grinding, the sand setting that it is characterized in that one section thickness grading cyclone feeds the gravity treatment flow process and is sorted, the overflow of one section thickness grading cyclone feeds the operation of two sections thickness grading cyclones and is sorted, and concrete steps are as follows:
1) overflow of one section thickness grading cyclone is fed to two sections cyclone classifications again, the sand setting of one section thickness grading cyclone feeds the gravity treatment flow process and is sorted, one section gravity concentrate is final concentrate, one section gravity tailings is true tailings, and the rear ore deposit of regrinding in one section gravity concentrate turns back to one section thickness grading cyclone;
2) go out-200 order content through two sections cyclone classifications and account for the sand setting of 80-90% coarse grain product and two kinds of products of overflow that-200 order content account for 96-98% particulate product;
3) sand setting of described two sections thickness grading cyclones feeds alkaline direct flotation operation, add NaOH and collecting agent in alkaline direct flotation is elected to be industry after, two sections overflow cyclone coarse grain products are carried out to the primary alkali direct flotation and roughly select, obtain alkaline direct flotation rough concentrate A and alkaline direct flotation mine tailing;
4) overflow of described two sections thickness grading cyclones feeds the inclined narrow flow classifying machine and carries out the desliming graded operation, and classification goes out to be greater than 19 μ m coarse grain products and is less than 19 μ m particulate products;
5) granularity of inclined narrow flow classifying machine desliming classification is less than to 19 μ m particulate products, feed oblique narrow stream Flocculation desliming bucket, and add medicament NaOH, starch and waterglass and sorted processing, obtain oblique narrow stream Flocculation desliming bucket concentrate and oblique narrow stream Flocculation desliming bucket mine tailing;
6) by the sorting operation that feeds alkaline reverse flotation that is greater than after 19 μ m coarse grain products and the thick smart A of alkaline direct flotation ore deposit merge of inclined narrow flow classifying machine desliming classification, carry out one thick a, essence, two and sweep alkaline reverse floatation process and sort, sort out alkaline concentrate through reverse flotation and alkaline reverse flotation mine tailing;
Described gravity concentrate, oblique narrow stream Flocculation desliming bucket concentrate and alkaline concentrate through reverse flotation are merged into final concentrate, and described gravity tailings, alkaline direct flotation mine tailing, alkaline reverse flotation mine tailing and oblique narrow stream Flocculation desliming bucket mine tailing are merged into true tailings.
Advantage of the present invention is:
The present invention is owing to having adopted above-mentioned technique, and jettisoning coarse grain mine tailing in alkaline direct flotation operation, for good granularmetric composition condition is created in follow-up anti-floating operation choosing;
The present invention adopts first inclined narrow flow classifying, rear Flocculation desliming bucket to be sorted processing, replaces strong magnetic operation, has improved the liberation degree of minerals that enters desliming operation material.
The present invention has embodied effective combination of alkaline direct flotation, alkaline reverse flotation and inclined narrow flow classifying machine desliming classification, oblique narrow stream Flocculation desliming bucket, effectively solved the low problem of the ferrous type ore particulate product beneficiating efficiency of height of the multiple iron mineral symbiosis such as bloodstone, magnetic iron ore, siderite, limonite, tailings grade reduces by 0.5% left and right, greatly promotes high ferrous type ore ore grinding particulate product beneficiating technology index.
The accompanying drawing explanation
Fig. 1 is former process chart.
Fig. 2 is process chart of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
A kind of high ferrous type ore particulate product Flocculation desliming of the present invention, alkaline method for floating, comprise that raw ore feeds the operation of one section thickness grading cyclone classification through the selected material of ore grinding, the sand setting that it is characterized in that one section thickness grading cyclone feeds the gravity treatment flow process and is sorted, the overflow of one section thickness grading cyclone feeds the operation of two sections thickness grading cyclones and is sorted, and concrete steps are as follows:
1) overflow of one section thickness grading cyclone is fed to two sections cyclone classifications again, the sand setting of one section thickness grading cyclone feeds the gravity treatment flow process and is sorted, one section gravity concentrate is final concentrate, one section gravity tailings is true tailings, and the rear ore deposit of regrinding in one section gravity concentrate turns back to one section thickness grading cyclone;
2) go out-200 order content through two sections cyclone classifications and account for the sand setting of 80-90% coarse grain product and two kinds of products of overflow that-200 order content account for 96-98% particulate product;
3) sand setting of described two sections thickness grading cyclones feeds alkaline direct flotation operation, add NaOH and collecting agent in alkaline direct flotation is elected to be industry after, two sections overflow cyclone coarse grain products are carried out to the primary alkali direct flotation and roughly select, obtain alkaline direct flotation rough concentrate A and alkaline direct flotation mine tailing;
4) overflow of described two sections thickness grading cyclones feeds the inclined narrow flow classifying machine and carries out the desliming graded operation, and classification goes out to be greater than 19 μ m coarse grain products and is less than 19 μ m particulate products;
5) granularity of inclined narrow flow classifying machine desliming classification is less than to 19 μ m particulate products, feed oblique narrow stream Flocculation desliming bucket, and add medicament NaOH, starch and waterglass and sorted processing, obtain oblique narrow stream Flocculation desliming bucket concentrate and oblique narrow stream Flocculation desliming bucket mine tailing;
6) by the sorting operation that feeds alkaline reverse flotation that is greater than after 19 μ m coarse grain products and the thick smart A of alkaline direct flotation ore deposit merge of inclined narrow flow classifying machine desliming classification, carry out one thick a, essence, two and sweep alkaline reverse floatation process and sort, sort out alkaline concentrate through reverse flotation and alkaline reverse flotation mine tailing;
Described gravity concentrate, oblique narrow stream Flocculation desliming bucket concentrate and alkaline concentrate through reverse flotation are merged into final concentrate, and described gravity tailings, alkaline direct flotation mine tailing, alkaline reverse flotation mine tailing and oblique narrow stream Flocculation desliming bucket mine tailing are merged into true tailings.
The present invention adopts the high inclined narrow flow classifying machine of effectiveness of classification to do further classification the particulate product of two sections thickness grading cyclones, and adopt oblique narrow stream Flocculation desliming bucket to be sorted being less than 19 μ m particulate products (material that liberation degree of minerals is high), directly select oblique narrow stream Flocculation desliming bucket concentrate and oblique narrow stream Flocculation desliming bucket mine tailing, the selected material grade of reverse flotation work is narrowed down, and reduced tailings grade 0.5% left and right.
At first the fine of one section thickness grading cyclone is fed to two sections thickness grading cyclone classifications again, in the situation that pressure is 0.12～0.18mpa, overfall tube diameter 110mm, mineral-feeding pipe diameter 120 mm, sand settling mouth diameter 60 mm, controls two sections thickness grading hydrocyclone sands and overflow output and respectively account for half.Two sections thickness grading hydrocyclone sands feed alkaline direct flotation operation to carry out alkaline direct flotation and roughly selects, and the medicament of employing is NaOH and KS-2 medicament, and its addition correspondence is respectively NaOH 100g/t. raw ore, KS-2 medicament 80g/t. raw ore.The alkalescence direct flotation is roughly selected concentration and is controlled at 40%～45%, and temperature is at 35 ℃～40 ℃, carry out the primary alkali direct flotation and roughly select and throw tail and sort, in time jettisoning the relatively thick gangue of thin rank raw meal particle size, the selected grain of this operation is extremely narrow has guaranteed to have better choosing minute result.Two sections thickness grading cyclone overflows adopt the further classification of KMLF-100/55 inclined narrow flow classifying machine, design partition size<19 μ m.The rough concentrate of>19 μ m materials and direct flotation merges and carries out a thick essence and scan alkaline reverse floatation process for twice and sort, the medicament adopted is NaOH, starch, calcium oxide and KS-2 medicament, its addition correspondence is respectively 330 g/t. raw ores, 240g/t. raw ore, 90g/t. raw ore and 80g/t. raw ore, the primary slurry pH value is adjusted into 11.0 left and right, roughly select concentration and be controlled at 40%, temperature is at 35 ℃, selected pH value is controlled at 11.0 ~ 11.5, one scans pH value is controlled at 10.0 ~ 10.5, and two scan pH value is controlled at 9.0 ~ 10.0.Obtain floating essence and floating tail.The overflow of KMLF-100/55 inclined narrow flow classifying machine i.e.<19 μ m materials, its characteristics liberation degree of minerals is high to be entered the operation of oblique narrow stream Flocculation desliming and sorts, add medicament NaOH, starch and waterglass, its addition correspondence is respectively 850 g/t. raw ores, 1200g/t. raw ore and 830g/t. raw ore, pulp density is 13 ~ 15% left and right, can obtain qualified concentrate containing and mine tailing.
Claims (1)
1. one kind high ferrous type ore particulate product Flocculation desliming, alkaline method for floating, comprise that raw ore feeds the operation of one section thickness grading cyclone classification through the selected material of ore grinding, the sand setting that it is characterized in that one section thickness grading cyclone feeds the gravity treatment flow process and is sorted, the overflow of one section thickness grading cyclone feeds the operation of two sections thickness grading cyclones and is sorted, and concrete steps are as follows:
1) overflow of one section thickness grading cyclone is fed to two sections cyclone classifications again, the sand setting of one section thickness grading cyclone feeds the gravity treatment flow process and is sorted, one section gravity concentrate is final concentrate, one section gravity tailings is true tailings, and the rear ore deposit of regrinding in one section gravity concentrate turns back to one section thickness grading cyclone;
2) go out-200 order content through two sections cyclone classifications and account for the sand setting of 80-90% coarse grain product and two kinds of products of overflow that-200 order content account for 96-98% particulate product;
3) sand setting of described two sections thickness grading cyclones feeds alkaline direct flotation operation, add NaOH and collecting agent in alkaline direct flotation is elected to be industry after, two sections overflow cyclone coarse grain products are carried out to the primary alkali direct flotation and roughly select, obtain alkaline direct flotation rough concentrate A and alkaline direct flotation mine tailing;
4) overflow of described two sections thickness grading cyclones feeds the inclined narrow flow classifying machine and carries out the desliming graded operation, and classification goes out to be greater than 19 μ m coarse grain products and is less than 19 μ m particulate products;
5) granularity of inclined narrow flow classifying machine desliming classification is less than to 19 μ m particulate products, feed oblique narrow stream Flocculation desliming bucket, and add medicament NaOH, starch and waterglass and sorted processing, obtain oblique narrow stream Flocculation desliming bucket concentrate and oblique narrow stream Flocculation desliming bucket mine tailing;
6) by the sorting operation that feeds alkaline reverse flotation that is greater than after 19 μ m coarse grain products and the thick smart A of alkaline direct flotation ore deposit merge of inclined narrow flow classifying machine desliming classification, carry out one thick a, essence, two and sweep alkaline reverse floatation process and sort, sort out alkaline concentrate through reverse flotation and alkaline reverse flotation mine tailing;
Described gravity concentrate, oblique narrow stream Flocculation desliming bucket concentrate and alkaline concentrate through reverse flotation are merged into final concentrate, and described gravity tailings, alkaline direct flotation mine tailing, alkaline reverse flotation mine tailing and oblique narrow stream Flocculation desliming bucket mine tailing are merged into true tailings.
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Citations (6)
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|---|---|---|---|---|
| US3292780A (en) * | 1964-05-04 | 1966-12-20 | Donald W Frommer | Process for improved flotation treatment of iron ores by selective flocculation |
| CA857816A (en) * | 1970-12-08 | M. Hays Ronald | Iron ore treating process | |
| CN1548234A (en) * | 2003-05-23 | 2004-11-24 | 鞍钢集团鞍山矿业公司研究所 | Ore dressing process of treating poor hematite |
| CN102019227A (en) * | 2009-09-18 | 2011-04-20 | 鞍钢集团矿业公司 | Lean hematite stage grinding and high intensity magnetism, gravity separation, negative ion reverse flotation technique |
| CN102806139A (en) * | 2012-08-17 | 2012-12-05 | 中冶长天国际工程有限责任公司 | Ore benefication process for low-grade fine particle grade embedded distribution refractory iron ore |
| CN102974446A (en) * | 2012-12-11 | 2013-03-20 | 中国地质科学院矿产综合利用研究所 | Oolitic hematite dressing method |
-
2013
- 2013-09-05 CN CN201310397798.3A patent/CN103447161B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA857816A (en) * | 1970-12-08 | M. Hays Ronald | Iron ore treating process | |
| US3292780A (en) * | 1964-05-04 | 1966-12-20 | Donald W Frommer | Process for improved flotation treatment of iron ores by selective flocculation |
| CN1548234A (en) * | 2003-05-23 | 2004-11-24 | 鞍钢集团鞍山矿业公司研究所 | Ore dressing process of treating poor hematite |
| CN102019227A (en) * | 2009-09-18 | 2011-04-20 | 鞍钢集团矿业公司 | Lean hematite stage grinding and high intensity magnetism, gravity separation, negative ion reverse flotation technique |
| CN102806139A (en) * | 2012-08-17 | 2012-12-05 | 中冶长天国际工程有限责任公司 | Ore benefication process for low-grade fine particle grade embedded distribution refractory iron ore |
| CN102974446A (en) * | 2012-12-11 | 2013-03-20 | 中国地质科学院矿产综合利用研究所 | Oolitic hematite dressing method |
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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: Anshan Iron & Steel Group Mining Co., Ltd. |