CN101138744A - Dry type magnetic separation method of iron ore concentrate powder - Google Patents
Dry type magnetic separation method of iron ore concentrate powder Download PDFInfo
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- CN101138744A CN101138744A CNA2006101519815A CN200610151981A CN101138744A CN 101138744 A CN101138744 A CN 101138744A CN A2006101519815 A CNA2006101519815 A CN A2006101519815A CN 200610151981 A CN200610151981 A CN 200610151981A CN 101138744 A CN101138744 A CN 101138744A
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Abstract
The present invention discloses a method for dry grinding and dry magnetic separation of iron concentrate powder, and in particular belongs to a method for eliminating a ball grinder and thoroughly improving a wet magnetic separation technique. With the present invention, a traditional jaw crusher is used for coarse crushing of ores, an improved cone fine crusher is used for fine crushing of ores, a jaw-roller grinder (ZL01204877.1) of a utility model patent is used for dry grinding of ores, and a high-performance dry magnetic separation machine (200420115097.2) is used for dry magnetic separation, so the iron concentrate powder with the grade above 65 percent is produced, the ball grinder is eliminated, large amount of water is saved, and environmental pollution and land occupancy by the tailings pond sludge. Compared with the wet magnetic separation technique provided with the same treatment capacity, power consumption of the dry magnetic separation technique is one sixth to one eighth of the power consumption of the wet magnetic separation technique. The dry magnetic separation technique is a mineral separation technique, which saves power, water and iron and steel materials, which is favorable for environmental protection, and which is provided with the low cost and the high benefits. The dry magnetic separation technique is applicable in all fields of metallurgical mines and comprehensive industrial waste utilization.
Description
The invention discloses a kind of dry milling, in the method for formula magnetic separation of iron ore concentrate powder, specifically belong to superseded ball mill, put into the melting pot the method for wet magnetic separation technology.Before the present invention makes, traditional wet magnetic separation technology evolution more than 200 year, its technological process is to carry out carse, medium and small broken three sections broken processing ores with circular cone spallar or jaw crusher, then enter ball mill, 1.5 tons of water are joined in the ton ore deposit, the production process of carry out fine grinding, classification, magnetic separation, concentrate, fine iron breeze being finished in dehydration, and wherein the ball mill energy consumption is the highest, efficient is minimum, is example with Φ 2.2m * 6.5m ball mill; Motor 380KW, per hour ore grinding is 14 tons, 21 tons of water consumptions, 31 tons of ball loads, 44 tons of ball mill deadweights, the electric energy of 380KW be used on the finely ground ore ratio seldom, it is extremely low that a large amount of energy have been made idle work, efficient, again contaminated environment, be that many evils do not have the sharp mode of production, early should eliminate, improve.It should be noted that the technical staff who hankers after wet separation technology in order to pursue big output, also the diameter of ball mill will be maximized that walk far away and far away, vicious circle be can not extricate oneself on the thinking of ball mill.The objective of the invention is at the problems referred to above, solved the key issue of dry milling, dry type magnetic separation, opened means of livelihood thereby produce fine iron breeze for metallurgical mine.
The object of the present invention is achieved like this:
A kind of method with dry milling, dry type magnetic separation fine iron breeze, it is the coarse crushing of making ore with traditional jaw crusher, do the in small, broken bits of ore with improved circular cone fine crusher, utility model patent " pre-roller type grinding machine " with oneself (ZL01204877.1) is made the dry type grinding of ore, utility model patent " high-performance dry-type magnetic extractor " (200420115097.2) with oneself carries out dry type magnetic separation, produces grade at the fine iron breeze more than 65%.Thereby eliminate ball mill, save great lot of water resources, avoided pollution and the occupation of land of mine tailing mud to environment, compare with the wet magnetic separation of equal treating capacity, the dry type magnetic separation electricity consumption is 1/6～1/8 of wet magnetic separation electricity consumption, can save 5～7 times electric energy.Dry separation craft is economize on electricity, water saving, saves iron and steel stock consumption, helps environmental protection, low cost, and the ore-dressing technique of high benefit is applicable to all fields that metallurgical mine and industrial residue fully utilize.
Be that example (seeing process chart) is carried out specific description with the dry magnetic separation technology of per hour handling 20 tons of raw ores below: technological process 1 is 250 * 400 jaw crushers, the ore reduction to 0 of general＜210mm～80mm, give flow process 3 Φ 1300 circular cone fine crushers by flow process 2B=500L=12m belt feeder with mass transport, flow process 4 Φ 600 * 800 pre-roller type grinding machines under the powder that is milled to 0～5mm flows directly into, grinding fineness is 80～200 purpose mineral fines, by flow process 5, the B=500L=12m belt feeder is delivered to flow process 6 Φ 800 * 800 high-performance dry-type magnetic extractors, selects fine ore and mine tailing respectively; Fine ore is through flow process 7, and the B=500L=12m belt feeder is given flow process 8 overhead storehouses, is seen off by automobile.Mine tailing is through flow process 9, and the B=500L=12m belt feeder is imported overhead storehouse, and automobile is transported and built up fields.
The embodiment of the invention:
According to aforesaid process scheme, certain ore dressing plant is invested 500,000 yuan wet separation factory is undergone technological transformation.Build up one the cover 20 tons/time treating capacity dry type magnetic separation factory.About head grade 20%, produce grade daily 100 tons of the fine ores more than 65%, 400 yuan of ton concentrate prices, 40,000 yuan of day output values, the daily output totle drilling cost accounts for 2.8 ten thousand yuan, and day is made profits 1.2 ten thousand yuan.Year is made profits 3,600,000 yuan.
Description of drawings:
Accompanying drawing is the dry type magnetic separation flow chart.
φ 800 * 800 high-performance dry magnetic separation technology complete set of equipments data
(treating capacity 20 tons/time)
| The device name specifications and models | 250 * 400 jaw crushers | φ 800 * 800 high-performance dry-type magnetic extractors | φ 1300 gyratory fine crushers | φ 600 * 800 jaw-roller crushing mills | B=500 L=12m belt feeder | Feeding warehouse and support | The high feed bin of concentrate mine tailing | Add up to |
| Motor | 15KW | 2KW | 18.5KW | 25.5kw | 2.2kw | 69.8KW | ||
| Treating capacity | 20 tons/time | 20 tons/time | 20 tons/time | 20 tons/time | 20 tons/time | |||
| The granularity grade | Advance grain 210 and go out grain 80 | 80～200 order head grades 8～30% | Advance grain 120 and go out grain 0～5mm | Advance grain 0～5 and go out grain 80～200 orders | 80～200 orders | |||
| The rate of recovery | 90％ | 90％ | ||||||
| Concentrate grade | More than 65% | More than 65% | ||||||
| Weight | 2.75 ton | 0.6 ton | 7 tons | 2 tons | 1 ton * 4 | 3 tons | 3 tons * 2 | 25.35 ton |
| Price | 2.6 ten thousand yuan | 50,000 yuan | 110,000 yuan | 50,000 yuan | 10,000 * 4 | 20,000 yuan | 20,000 * 2 | 33.6 ten thousand yuan |
| Benefit is estimated | 3,000,000/year |
Claims (1)
1. method of producing fine iron breeze with dry milling, dry type magnetic separation, it is characterized in that iron ore being machined to 0～5mm from 120mm with the circular cone fine crusher, use " Jaw ring-roller mill " with fine iron ore grinding to 80～200 orders again, use " high-performance dry-type magnetic extractor " to carry out dry type magnetic separation then, can select high-grade fine iron breeze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101519815A CN101138744A (en) | 2006-09-05 | 2006-09-05 | Dry type magnetic separation method of iron ore concentrate powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101519815A CN101138744A (en) | 2006-09-05 | 2006-09-05 | Dry type magnetic separation method of iron ore concentrate powder |
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| Publication Number | Publication Date |
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| CN101138744A true CN101138744A (en) | 2008-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006101519815A Pending CN101138744A (en) | 2006-09-05 | 2006-09-05 | Dry type magnetic separation method of iron ore concentrate powder |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101385992B (en) * | 2008-10-20 | 2010-06-02 | 海盐机械厂 | Dry dressing method for separating iron from iron ore |
| CN102921547A (en) * | 2012-11-20 | 2013-02-13 | 北方重工集团有限公司 | Dry type ore dressing process for iron ore |
| CN101559403B (en) * | 2009-05-31 | 2013-03-20 | 安徽大昌矿业集团有限公司 | Method for concentrating extremely low-grade refractory magnetite |
| CN103120984A (en) * | 2011-11-19 | 2013-05-29 | 赵中林 | Method of iron concentrate powder magnetic separation in dry mode |
| CN103816990A (en) * | 2014-02-19 | 2014-05-28 | 哈巴河金坝矿业有限公司 | Method and device for comprehensively recycling gold flotation tailings |
| CN104023851A (en) * | 2011-08-01 | 2014-09-03 | 高级矿业资源有限公司 | Ore Beneficiation |
| CN107159429A (en) * | 2017-07-11 | 2017-09-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry grinding dry separation craft of iron ore |
| US10207275B2 (en) | 2012-10-26 | 2019-02-19 | Vale S.A. | Iron ore concentration process with grinding circuit, dry desliming and dry or mixed (dry and wet) concentration |
-
2006
- 2006-09-05 CN CNA2006101519815A patent/CN101138744A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101385992B (en) * | 2008-10-20 | 2010-06-02 | 海盐机械厂 | Dry dressing method for separating iron from iron ore |
| CN101559403B (en) * | 2009-05-31 | 2013-03-20 | 安徽大昌矿业集团有限公司 | Method for concentrating extremely low-grade refractory magnetite |
| CN104023851A (en) * | 2011-08-01 | 2014-09-03 | 高级矿业资源有限公司 | Ore Beneficiation |
| CN103120984A (en) * | 2011-11-19 | 2013-05-29 | 赵中林 | Method of iron concentrate powder magnetic separation in dry mode |
| US10207275B2 (en) | 2012-10-26 | 2019-02-19 | Vale S.A. | Iron ore concentration process with grinding circuit, dry desliming and dry or mixed (dry and wet) concentration |
| CN102921547A (en) * | 2012-11-20 | 2013-02-13 | 北方重工集团有限公司 | Dry type ore dressing process for iron ore |
| CN103816990A (en) * | 2014-02-19 | 2014-05-28 | 哈巴河金坝矿业有限公司 | Method and device for comprehensively recycling gold flotation tailings |
| CN103816990B (en) * | 2014-02-19 | 2016-06-29 | 哈巴河金坝矿业有限公司 | A kind of gold flotation tailing comprehensive recovering process and device thereof |
| CN107159429A (en) * | 2017-07-11 | 2017-09-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry grinding dry separation craft of iron ore |
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Open date: 20080312 |