CN100427223C - First separation process for lean magnetic iron ore - Google Patents
First separation process for lean magnetic iron ore Download PDFInfo
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- CN100427223C CN100427223C CNB2006100127510A CN200610012751A CN100427223C CN 100427223 C CN100427223 C CN 100427223C CN B2006100127510 A CNB2006100127510 A CN B2006100127510A CN 200610012751 A CN200610012751 A CN 200610012751A CN 100427223 C CN100427223 C CN 100427223C
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Abstract
The present invention relates to an iron ore dressing technology, and more specifically, is a first ore dressing technology for low-grade lean magnetic iron ore. The technology comprises the following steps: ore is crushed by a jaw crusher, and magnetized and dry selected by a magnetization wheel, the ore material dry selected by the magnetization wheel is directly filled in a hammer crusher, and the finely crushed ore is entered roller screen for sieving; the ore material with a particle diameter smaller than 4mm is filled in a mud pump, and the ore material with a particle diameter larger than 4mm is filled in the hammer crusher for crushing again; the ore slurry with a particle diameter smaller than 4mm is sucked in a mamagnetic separator by the mud pump, 50 grade of a finished product and tailings are separated, and tailings are filled in a recovering machine; 30 grade of iron mineral powder is recycled, the rest parts are filled in the roller screen for sieving, and sand and slurry waste are separated. In the present invention, the hammer crusher replaces a ball mill, the consumption of a ball and a lining board is decreased, the maintenance cost is reduced, and single investment saves 9 times of background technique. The consumption of electricity and water are respectively decreased by 50%, the sieved waste material is not mixed for processing with the useful ore, the process of processing the ore particle to be a particle with a diameter below 1mm for magnetic selection is omitted, and therefore, the processing cost is saved and the grade of iron powder is enhanced.
Description
Technical field
The present invention relates to a kind of iron ore-dressing technique, particularly relate to one of a kind of lean magnetic low grade iron ore and select technology.
Background technology
The mineral processing circuit of at present domestic lean magnetic low grade iron ore to iron-holder about 20% is: with ore reduction, magnetization dry separation, ball milling, magnetic separation, high frequency screening, magnetic separation, the ore iron-holder is brought up to 50%～60%, this process is called a choosing.This technological process is domestic middle or small one to select factory extensively to adopt.Its weak point is, the one, and to build one of equal scale and select factory, equipment investment is big, generally needs 200～3,000,000 yuans; The 2nd, the time of founding the factory is long, needs more than 6 months; The 3rd, water consumption in the production process, power consumption are big, and last mine tailing falls as whole waste disposal.This technology can not satisfy the social environment needs of energy-saving and environmental protection well.
Summary of the invention
Goal of the invention of the present invention is intended at disadvantages of background technology, and provide a kind of and replace ball mill with hammer-crusher, mine tailing roller screen sizing screening, the investment of founding the factory is little, and one of energy-saving and cost-reducing lean magnetic low grade iron ore selects technology.
Goal of the invention of the present invention is achieved in that the new technology of a kind of lean magnetic low grade iron ore one choosing of design, replace ball mill with hammer-crusher, finishing operation increases roller screen, with roller screen mine tailing is divided into sand, mud, mud is waste product, and clean sand can be used as construction material.
Technological process of the present invention is: comprise and select ore, with ore jaw crushing crusher machine, magnetization dry separation is taken turns with magnetization in broken back, its invention main points are, will be carefully broken directly into hammer-crusher through the mineral aggregate of magnetization wheel dry separation, ore after thin the breaking enters the roller screen screening, and particle diameter enters slush pump less than shot-like particle and the powder of 4mm, and particle diameter enters hammer-crusher fragmentation once more greater than the shot-like particle of 4mm; Slush pump will carry out magnetic separation less than 4mm ore pulp suction magnetic separator, tell the finished product and the mine tailing of 50 grades of iron content 50%, and mine tailing is entered the recovery machine, and the recovery grade is 30 Iron Ore Powder, and remainder enters the roller screen screening, sub-elects sand and mud.
The present invention compares with traditional handicraft and has the following advantages:
1, investment is little.Equipment investment is 1/5 (500,000/2,500,000) of traditional process equipment investment;
2, instant effect.Build identical production-scale factory, the present invention is constructed and put into operation needs 30 days, and mounting cost reduces.Traditional handicraft needs 180 days, and mounting cost is big.
3, replace ball mill with hammer-crusher, ball, liner plate consumption reduce, and maintenance expense reduces, and independent investment can be saved 9 times than background technology.
4, energy efficiency.Electric consumption reduces by 50%, and water consumption reduces by 50%, and the waste material that sieves out no longer confuses processing with valuable rock, energy savings.
5, screenings of the present invention is grain, the powder mixed ore pulp less than 4mm, has cast out ore particles is processed into below the 1mm process of magnetic separation again, has saved processing charges, has improved the iron powder grade.
6, mine tailing roller screen sizing screening drops to refuse minimum.
Description of drawings
Accompanying drawing 1 is a process chart of the present invention
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.Accompanying drawing 1 provides is that the iron ore one of 450 ton of 20 grade selects embodiment, and referring to accompanying drawing 1, technological process of the present invention is: the lean magnetic low grade iron ore of 450 ton of 20 grade is selected, selected 50 tons in rubble.400 tons of iron ores selecting are put into the jaw crusher fragmentation that operating power is 35KW, mineral aggregate after the fragmentation is through the magnetization wheel dry separation of 10KW, after selecting the part rubble, the hammer-crusher of going into 120 type 75KW is carefully broken, material after thin the breaking enters 15KW, 4mm hole roller screen, in roller screen, per hour add 50 tons in water, enter the 13KW slush pump through roller screen screening back screenings particle diameter less than the material of 4mm, the oversize particle diameter returns in the hammer-crusher to confuse with the raw material behind the broken crusher machine of jaw greater than the material of 4mm and continues fragmentation.Slush pump will carry out magnetic separation less than the magnetic separator of the ore pulp suction 10KW of 4mm, tell two kinds of products, a kind of is 180 tons of the iron powders of the iron content 50% of 50 grades, and another kind is the mine tailing that contains small amounts of iron, sand, these mine tailings are gone into the recovery machine of 5KW, the vibration magnetic separation is reclaimed, and reclaims 10 tons of the iron powders of 30 grades, and remainder enters last procedure-roller screen, roller screen is selected the 1.5mm mesh sieve for use, sub-elect sand and mine tailing mud, oversize is 80 tons of clean sands, can be used as construction material and uses.The lower part of screen is divided into 130 tons of refuse mine tailings.
The present invention enters 450 tons of the iron ores of 20 grades, can gather in the crops 180 tons of the Iron Ore Powder of 50 grades, 10 tons of the Iron Ore Powder of 30 grades, 80 tons of sands.
Jaw crusher of the present invention adopts 400 * 600 types, and magnetization wheel dry-dressing machine is 450 * 600 types, and hammer-crusher is 120 types, roller screen is 1.2 * 3m type sieve, and slush pump is the 50ZDQ type, and magnetic separator is the CTB718 type, the recovery machine is the YC1/8 type, and roller screen is 0.5mm, 1.2 * 3m type sieve.
The present invention need not to change technology if will change output, adjusts plant capacity and can obtain to set output.
Claims (1)
1, one of a kind of lean magnetic low grade iron ore selects technology, comprise and select ore, with ore jaw crushing crusher machine, magnetization dry separation is taken turns with magnetization in broken back, it is characterized in that its technological process also comprises: will be carefully broken directly into hammer-crusher through the mineral aggregate of magnetization wheel dry separation, the ore after thin the breaking enters the roller screen screening, particle diameter enters slush pump less than shot-like particle and the powder of 4mm, and particle diameter enters hammer-crusher fragmentation once more greater than the shot-like particle of 4mm; Slush pump will carry out magnetic separation less than 4mm ore pulp suction magnetic separator, tell the finished product and the mine tailing of 50 grades of iron content 50%, and mine tailing is entered the recovery machine, and the recovery grade is 30 Iron Ore Powder, and remainder enters the roller screen screening, sub-elects sand and mud refuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100127510A CN100427223C (en) | 2006-05-23 | 2006-05-23 | First separation process for lean magnetic iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100127510A CN100427223C (en) | 2006-05-23 | 2006-05-23 | First separation process for lean magnetic iron ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1857798A CN1857798A (en) | 2006-11-08 |
| CN100427223C true CN100427223C (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100127510A Expired - Fee Related CN100427223C (en) | 2006-05-23 | 2006-05-23 | First separation process for lean magnetic iron ore |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318159B (en) * | 2007-06-08 | 2013-04-10 | 鞍钢集团矿业公司 | Process for recycling Anshan type lean octahedral iron ore mine tailing |
| CN102179284B (en) * | 2011-01-26 | 2012-10-03 | 重钢西昌矿业有限公司 | Method for crushing iron ore |
| CN102198425A (en) * | 2011-04-23 | 2011-09-28 | 内蒙古科技大学 | Dry presorting and tailings discarding process for ultra-poor magnetite |
| CN102773142B (en) * | 2012-05-31 | 2014-04-02 | 安徽大昌矿业集团有限公司 | Anshan type lean magnetite underground ore dressing and filling method |
| CN104174483A (en) * | 2014-09-03 | 2014-12-03 | 鞍钢集团矿业公司 | Method for sorting fine-particle strongly magnetic mineral in hematite beneficiation process |
| CN107803340A (en) * | 2017-12-08 | 2018-03-16 | 承德天宝矿业集团有限公司 | The method and system of phosphorus composition is extracted from iron ore tailings |
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| CN2154752Y (en) * | 1993-02-11 | 1994-02-02 | 鞍山钢铁公司 | Pulp oscillator |
| US5496526A (en) * | 1993-08-30 | 1996-03-05 | The United States Of America As Represented By The Secretary Of The Interior | Production of intermediate grade manganese concentrate from low grade manganiferous ores |
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| CN2626608Y (en) * | 2003-04-11 | 2004-07-21 | 王建鑫 | Rotor of vertical shaft type fine crusher |
| CN1454715A (en) * | 2003-04-18 | 2003-11-12 | 韩淑芬 | Iron ore dressing method |
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| CN1857798A (en) | 2006-11-08 |
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