CN104923383A - Dressing and grinding technology for low-grade magnesite - Google Patents
Dressing and grinding technology for low-grade magnesite Download PDFInfo
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- CN104923383A CN104923383A CN201410099545.2A CN201410099545A CN104923383A CN 104923383 A CN104923383 A CN 104923383A CN 201410099545 A CN201410099545 A CN 201410099545A CN 104923383 A CN104923383 A CN 104923383A
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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
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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Abstract
The invention relates to a magnesite dressing and grinding technology, and especially relates to a dressing and grinding technology for low-grade magnesite. The dressing and grinding technology comprises following steps of medium-fine grinding, desilication by reverse floatation, concentrate condensation, middling regrinding and decalcification by obverse floatation. The desilication by reverse floatation step is carried out in a way that after the slurry mixing process of the grinding product, the mineral slurry concentration is 25-35%, a floatation process that rougher flotation and cleaner flotation are sequentially executed is adopted by the reverse floatation, dodecylamine serves as a collecting agent, the dodecylamine is present in an amount of 80-100g, based on a ton of raw ore, water glass serves as an inhibitor, and the water glass is present in an amount of 100-200g, based on a ton of raw ore. The dressing and grinding technology for the low-grade magnesite is advantaged in that by optimizing the grinding flow, over crushing phenomena are reduced, the argillization degree is reduced, the mineral processing index can be further increased, and the filtering performance of the mineral processing product can be improved.
Description
Technical field
The present invention relates to a kind of magnesite ore dressing and grinding process, particularly relate to a kind of low-grade magnesite ore dressing and grinding process.
Background technology
Dashiqiao, Liaoning-Haicheng City magnesite belongs to explanation type magnesite deposit, and in Dashiqiao-Haicheng City mine belt, each mining area master stratum belongs to calcium carbonate and magnesium carbonate group in the middle part of Liaohe Group Proterozoic erathem.Stratum, mining area is extremely newly had by old: mica schist section, bottom silication dolomite press from both sides phyllite layer, tremolite dolomite stratigraph and upper suicide dolomite and presss from both sides phyllite layer.Ore body is contained in tremolite dolomite or tremolite dolomitic marble.Each mining area is monoclinal structure, major constituents form to be fractured into master, fold agensis; Tomography can be summarized as longitudinal tomography and the large class of lateral fault two by its character, due to the impact by tomography, and fecund more raw obvious joint and cracks.Later stage dolomite or dolomite magnesite mineral ore is filled with in joint and crack.
Flotation utilizes the difference of mineral surface physicochemical properties to carry out ore dressing.As talcum belongs to nonpolar mineral, surface wettability is little, and natural floatability is better, and the segregation ratio between magnesite is easier to, and only adds foaming agent just can swim to film-form talcum, for other talcums in neutral medium, and also can emersion after adding amine collector.But magnesite and dolomite are polar mineral, after broken, mineral surfaces is ionic bond, and hydrophily is strong, not easily floats.And floatability difference between them is very little, add calcium, between iron with magnesium, easily become isomorph, therefore the separation between them is very difficult.The flotation of current magnesite is generally, after adopting reverse flotation to remove the silicate minerals such as talcum, add effective inhibitor and suppress other gangue minerals, in alkaline ore pulp, with the trans-direct flotation principle process of fatty acid collecting agent direct flotation magnesite.Because the grindability between talcum and dolomite exists larger difference, therefore, single ore grinding can produce argillization phenomenon, produces larger impact to flotation, and the index that therefore suitable ore grinding is formulated for concentrate has larger impact.
Summary of the invention
In order to solve the problem, the invention provides a kind of low-grade magnesite ore dressing and grinding process, object makes granularmetric composition in ore milling product reasonable, reduces its argillization degree, improve sorting index further, and can improve the strainability sorting product.
For achieving the above object, the invention provides a kind of low-grade magnesite ore dressing and grinding process, it comprises the steps:, and middle grinding, Counterfloatating desiliconization, concentrate be concentrated, middling ore regrinding, direct flotation decalcification.
Middle grinding be low-grade magnesite through fragmentation, product feeds high-pressure roller mill; High-pressure roller mill and air classifier form closed circuit grinding system, make ore milling product granularity for-0.074mm content is at 55-65%.
Counterfloatating desiliconization is that ore milling product makes pulp density be 25-35% after sizing mixing, and reverse flotation employing one is thick, the flotation flowsheet of two essences, and lauryl amine is as collecting agent, and consumption is 80-100 gram/ton-raw ore; Waterglass is as inhibitor, and consumption is 100-200 gram/ton-raw ore.
Concentrate concentrate be concentrate after flotation by dehydration equipment, make pulp density bring up to 45-55%.
Middling ore regrinding is that the concentrate after dehydration feeds ball mill, and ball mill and grader form closed circuit grinding system, makes ore milling product granularity for-0.074mm content is at 65-85%.
Direct flotation decalcification be ore milling product after sizing mixing, make pulp density be 20-30%, direct flotation adopts flotation flowsheet that is thick, an essence.Oleic acid after saponification is as collecting agent, and consumption is 800-1000 gram/ton-raw ore; Calgon is as inhibitor, and consumption is 150-300 gram/ton-raw ore.
Advantage of the present invention is: make the talcs mineral of the easiest monomer dissociation and magnesite and dolomite reach monomer dissociation by middle grinding, by reverse flotation, talcum is removed; Make dolomite and magnesite reach monomer dissociation for concentrate regrinding, by direct flotation, dolomite is removed.Can be reduced it by the optimization of grinding flowsheet and cross pulverizing, reduce its argillization degree, can further improve sorting index, and the strainability sorting product can be improved.
Detailed description of the invention
The invention will be further described below.
Embodiment 1
Low-grade magnesite, through fragmentation, feeds high-pressure roller mill; High-pressure roller mill and air classifier form closed circuit grinding system, make ore milling product granularity for-0.074mm content is 55%; Ore milling product pulp density after sizing mixing is 25%; Reverse flotation 4 adopts flotation flowsheet that is thick, two essences, and lauryl amine consumption is 80 grams/ton-raw ore, waterglass consumption is 100 grams/ton-raw ore; After flotation concentrate is concentrated, pulp density is 45%; Concentrate after concentrated is through feeding ball mill, and ball mill and grader form closed circuit grinding system, makes ore milling product granularity for-0.074mm content is 65%; Ore milling product pulp density after sizing mixing is 20%; Direct flotation employing one is thick, the flotation flowsheet of an essence, and the oleic acid consumption after saponification is 800 grams/ton-raw ore, calgon consumption is 150 grams/ton-raw ore.Its result is as shown in table 1:
。
Embodiment 2
Low-grade magnesite, through fragmentation, feeds high-pressure roller mill; High-pressure roller mill and air classifier form closed circuit grinding system, make ore milling product granularity for-0.074mm content is 60%; Ore milling product pulp density after sizing mixing is 35%; Reverse flotation employing one is thick, the flotation flowsheet of two essences, and lauryl amine consumption is 90 grams/ton-raw ore, waterglass consumption is 150 grams/ton-raw ore; After flotation concentrate is concentrated, pulp density is 55%; Concentrate after concentrated is through feeding ball mill, and ball mill and grader form closed circuit grinding system, makes ore milling product granularity for-0.074mm content is 80%; Ore milling product pulp density after sizing mixing is 30%; Direct flotation employing one is thick, the flotation flowsheet of an essence, and the oleic acid consumption after saponification is 950 grams/ton-raw ore, calgon consumption is 180 grams/ton-raw ore.Its result is as shown in table 2:
。
Embodiment 3
Low-grade magnesite, through fragmentation, feeds high-pressure roller mill; High-pressure roller mill and air classifier form closed circuit grinding system, make ore milling product granularity for-0.074mm content is 65%; Ore milling product pulp density after sizing mixing is 30%; Reverse flotation employing one is thick, the flotation flowsheet of two essences, and lauryl amine consumption is 85 grams/ton-raw ore, waterglass consumption is 180 grams/ton-raw ore; After flotation concentrate is concentrated, pulp density is 50%; Concentrate after concentrated is through feeding ball mill, and ball mill and grader form closed circuit grinding system, makes ore milling product granularity for-0.074mm content is 75%; Ore milling product pulp density after sizing mixing is 25%; Direct flotation employing one is thick, the flotation flowsheet of an essence, and the oleic acid consumption after saponification is 900 grams/ton-raw ore, calgon consumption is 200 grams/ton-raw ore.Its result is as shown in table 3:
。
Embodiment 4
Low-grade magnesite, through fragmentation, feeds high-pressure roller mill; High-pressure roller mill and air classifier form closed circuit grinding system, make ore milling product granularity for-0.074mm content is 60%; Ore milling product pulp density after sizing mixing is 35%; Reverse flotation employing one is thick, the flotation flowsheet of two essences, and lauryl amine consumption is 100 grams/ton-raw ore, waterglass consumption is 200 grams/ton-raw ore; After flotation concentrate is concentrated, pulp density is 55%; Concentrate after concentrated is through feeding ball mill, and ball mill and grader form closed circuit grinding system, makes ore milling product granularity for-0.074mm content is 85%; Ore milling product pulp density after sizing mixing is 30%; Direct flotation employing one is thick, the flotation flowsheet of an essence, and the oleic acid consumption after saponification is 1000 grams/ton-raw ore, calgon consumption is 300 grams/ton-raw ore.Its result is as shown in table 4:
Claims (6)
1. a low-grade magnesite ore dressing and grinding process, is characterized in that being made up of following step: through in grinding, Counterfloatating desiliconization, concentrate concentrated, middling ore regrinding, direct flotation decalcification process.
2. a kind of low-grade magnesite ore dressing and grinding process according to claim 1, it is characterized in that middle grinding be low-grade magnesite through fragmentation, feed high-pressure roller mill; High-pressure roller mill and air classifier form closed circuit grinding system, make ore milling product granularity for-0.074mm content is at 55-65%.
3. a kind of low-grade magnesite ore dressing and grinding process according to claim 1, it is characterized in that Counterfloatating desiliconization is that ore milling product makes pulp density be 25-35% after sizing mixing, reverse flotation employing one is thick, the flotation flowsheet of two essences, wherein lauryl amine is as collecting agent, and consumption is 80-100 gram/ton-raw ore; Waterglass is as inhibitor, and consumption is 100-200 gram/ton-raw ore.
4. a kind of low-grade magnesite ore dressing and grinding process according to claim 1, it is characterized in that concentrate concentrate be concentrate after flotation by dehydration equipment, make pulp density bring up to 45-55%.
5. a kind of low-grade magnesite ore dressing and grinding process according to claim 1, it is characterized in that middling ore regrinding be concentrated after concentrate feed ball mill, ball mill and grader form closed circuit grinding system, make ore milling product granularity for-0.074mm content is at 65-85%.
6. a kind of low-grade magnesite ore dressing and grinding process according to claim 1, it is characterized in that direct flotation decalcification is that ore milling product is after sizing mixing, pulp density is made to be 20-30%, direct flotation employing one is thick, the flotation flowsheet of an essence, oleic acid wherein after saponification is as collecting agent, and consumption is 800-1000 gram/ton-raw ore; Calgon is as inhibitor, and consumption is 150-300 gram/ton-raw ore.
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| CN201410099545.2A CN104923383A (en) | 2014-03-18 | 2014-03-18 | Dressing and grinding technology for low-grade magnesite |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179759A (en) * | 2016-07-26 | 2016-12-07 | 大连理工大学 | High-voltage pulse outfield intensifying combines electrostatic separation and reclaims the method and apparatus of magnesite |
| CN106311459A (en) * | 2016-10-25 | 2017-01-11 | 吉林吉恩镍业股分有限公司 | Method for grading and dehydration by using vibrating screen in graphite flotation |
| CN106345616A (en) * | 2016-11-28 | 2017-01-25 | 肃北镁科技耐火材料有限责任公司 | Flotation calcium-removing agent and method for magnesite |
| CN106552716A (en) * | 2017-01-10 | 2017-04-05 | 太原理工大学 | A kind of method of magnesite upgrading |
| CN106733101A (en) * | 2017-01-11 | 2017-05-31 | 沈阳鑫博工业技术股份有限公司 | A kind of flotation starches preparation system and method with low-grade magnesite |
| CN107413514A (en) * | 2017-06-19 | 2017-12-01 | 中冶北方（大连）工程技术有限公司 | A kind of high-silicon high calcium magnesite low cost ore-dressing technique |
| CN110124851A (en) * | 2019-04-30 | 2019-08-16 | 东北大学 | A method of the decalcification of magnesite ore inverse flotation is carried out using EDDHA inhibitor |
| WO2020118739A1 (en) * | 2018-12-14 | 2020-06-18 | 东北大学 | Method for temperature controlled flotation decalcification of magnesite |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179759A (en) * | 2016-07-26 | 2016-12-07 | 大连理工大学 | High-voltage pulse outfield intensifying combines electrostatic separation and reclaims the method and apparatus of magnesite |
| CN106311459A (en) * | 2016-10-25 | 2017-01-11 | 吉林吉恩镍业股分有限公司 | Method for grading and dehydration by using vibrating screen in graphite flotation |
| CN106311459B (en) * | 2016-10-25 | 2019-01-15 | 吉林吉恩镍业股份有限公司 | A method of using vibrating screen Dewatering in graphite flotation |
| CN106345616A (en) * | 2016-11-28 | 2017-01-25 | 肃北镁科技耐火材料有限责任公司 | Flotation calcium-removing agent and method for magnesite |
| CN106552716A (en) * | 2017-01-10 | 2017-04-05 | 太原理工大学 | A kind of method of magnesite upgrading |
| CN106733101A (en) * | 2017-01-11 | 2017-05-31 | 沈阳鑫博工业技术股份有限公司 | A kind of flotation starches preparation system and method with low-grade magnesite |
| CN107413514A (en) * | 2017-06-19 | 2017-12-01 | 中冶北方（大连）工程技术有限公司 | A kind of high-silicon high calcium magnesite low cost ore-dressing technique |
| CN107413514B (en) * | 2017-06-19 | 2019-03-15 | 中冶北方（大连）工程技术有限公司 | A kind of high-silicon high calcium magnesite low cost ore-dressing technique |
| WO2020118739A1 (en) * | 2018-12-14 | 2020-06-18 | 东北大学 | Method for temperature controlled flotation decalcification of magnesite |
| CN110124851A (en) * | 2019-04-30 | 2019-08-16 | 东北大学 | A method of the decalcification of magnesite ore inverse flotation is carried out using EDDHA inhibitor |
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Application publication date: 20150923 |