CN106669966A - Beneficiation method for specular hematite in iron ore - Google Patents
Beneficiation method for specular hematite in iron ore Download PDFInfo
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- CN106669966A CN106669966A CN201510757464.1A CN201510757464A CN106669966A CN 106669966 A CN106669966 A CN 106669966A CN 201510757464 A CN201510757464 A CN 201510757464A CN 106669966 A CN106669966 A CN 106669966A
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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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
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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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- 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
Abstract
The invention discloses a beneficiation method for specular hematite in iron ore. The beneficiation method comprises the following steps that firstly, the ion grade of crude ore contains 31.65% of Fe. After a segment of closed-circuit grinding and classification is conducted, the ore is ground to -0.074 mm, the size fraction accounts for 50%, a small amount of hematite is separated out through a weak magnetic separator, primary rough separation and primary scavenging are conducted through a strong magnetic separator, the ahead abandonment yield is 43.00%, and the grade contains 9.21% of tailings; secondly, a second segment of closed-circuit grinding and classification is conducted on the weak magnetic separation concentrate and strong magnetic separation concentrate, the concentrate is ground to -0.074 mm, the size fraction accounts for 80%, then a part of finished iron concentrate with the grade containing more than 65% of Fe is obtained through the second-segment weak magnetic separation and second-segment strong magnetic concentrate separation, the iron concentrate yield of the second-segment strong magnetic concentrate separation accounts for 29.5% of the iron concentrate yield of the crude ore and accounts for 75.74% of the iron concentrate yield of the total concentrate in the whole process; and thirdly, the tailings obtained through the second-segment strong magnetic concentrate separation are subjected to second-segment strong magnetic scavenging, the concentrate obtained through the second-segment strong magnetic scavenging is subjected to reverse-flotation concentrate separation after being concentrated, and the other part of finished iron concentrate with the grade of 64.96% is obtained through reverse-flotation. By the adoption of the beneficiation method for the specular hematite in the iron ore, the whole production process is stable, and the index is excellent.
Description
Technical field
The present invention relates to a kind of speculum iron beneficiation method, and in particular to the beneficiation method of speculum iron in a kind of iron mine, belong to speculum iron technical field of beneficiation.
Background technology
Ferrum is the most metal of consumption in the world, steel and iron industry occupies critical role in the national economy of various countries, therefore iron ore resource is substantially effectively developed, for the continual and steady development of China's steel and iron industry the important leverage that stable, enough, high-quality iron ore raw material is China's steel and iron industry sustainable development is provided；China's iron ore resource major part is lean ore, disseminated grain size is thin, complicated difficult ore dressing is more, the rich ore of iron content more than 50% only accounts for 5.7%, lean ore accounts for 94.3%, chromium depleted zone is had to pass through after ore dressing could be smelted, with the development and the continuous progress of science and technology of society, application of the nonmetallic ore in national economy is more and more extensive, it is increasing to the demand of nonmetallic ore material, the prescription of nonmetallic ore also more and more higher, for most of nonmetal mineral products, ferrous contaminants are that its is main while being also most harmful impurity composition, in some industries such as glass, Ceramic Material, the applications such as refractory material, carry out iron removing and impurity reducing to raw mineral materials has become necessary technological requirement；Magnetic separation is to make different minerals realize a kind of detached beneficiation method using the magnetic contrast between mineral in non-uniform magnetic field; magnetic method is widely used in the sorting of ferrous metal Ore, has in the recovery of medium in the selected of normal complexion rare metal ore, heavymedia separation, nonmetallic ore raw material except ferrum and discharge ferrum thing protection disintegrating machine and other equipment, steel scrap is reclaimed from the slag for smelting production and pollutant etc. are removed from production and sanitary sewage.
The content of the invention
（One）The technical problem to be solved
To solve the above problems, the present invention proposes a kind of beneficiation method of speculum iron in iron mine, and whole production procedure is stablized, and index is excellent.
（Two）Technical scheme
The beneficiation method of speculum iron, comprises the following steps in the iron mine of the present invention：
The first step：Raw ore Iron grade 31.65%Fe, mono- section of closed circuit grinding classification of Jing to -0.074mm grades account for 50%, a small amount of bloodstone is selected with weak magnetic separator, one roughing is carried out with intensity magnetic separator and once purging selection abandons in advance yield for 43.00%, grade is 9.21% mine tailing, it is ensured that one section strong magnetic tailings grade remains at low levels；
Second step：Weak magnetic concentrate selection and the closed circuit classifying grinding of high intensity magnetic separation concentrate Jing two-stage nitration to -0.074mm grades account for 80%, then with the selected iron ore concentrate finished product for obtaining more than the Fe of a part of grade 65% of two-stage nitration low intensity magnetic separation and the strong magnetic of two-stage nitration, the wherein selected iron ore concentrate yield of the strong magnetic of two-stage nitration accounts for the 29.5% of raw ore, accounts for the 75.74% of the total concentrate of whole process；
3rd step：The selected mine tailing of the strong magnetic of two-stage nitration again scan by the strong magnetic of Jing two-stage nitration, and selected with reverse flotation after the strong magnetic scavenger concentrate of two-stage nitration is concentrated, reverse flotation obtains the iron ore concentrate finished product that another part grade is 64.96%.
Used as preferred embodiment, one section of high intensity magnetic separation slightly sweeps using one in the method for the first step to the 3rd step, and two-stage nitration high intensity magnetic separation single-minded is swept using one, it is ensured that whole process obtains higher recovery rate in ore-dressing；Due to high intensity magnetic separation operating cost it is low, high intensity magnetic separation has been abandoned most of mine tailing and drawn most of concentrate in advance, and the strong magnetic scavenger concentrate of two-stage nitration for only accounting for raw ore 12% enters people's reverse flotation work, due to the operating cost of reverse flotation it is higher, the ore deposit amount for entering people's reverse flotation is fewer, and full-range production cost is lower.
（Three）Beneficial effect
Compared with prior art, the beneficiation method of speculum iron in the iron mine of the present invention, the maximization of pulsating high gradient magnetic separator with vertical ring advantageously reduces the energy consumption for processing Ore per ton, by optimizing magnetic architecture, reduction leakage field, using measures such as high-quality copper pipe, the consumption of increase copper and reduction exciting curent density, make power consumption have significant reduction, reduce production cost.
Specific embodiment
The beneficiation method of speculum iron, comprises the following steps in a kind of iron mine：
The first step：Raw ore Iron grade 31.65%Fe, mono- section of closed circuit grinding classification of Jing to -0.074mm grades account for 50%, a small amount of bloodstone is selected with weak magnetic separator, one roughing is carried out with intensity magnetic separator and once purging selection abandons in advance yield for 43.00%, grade is 9.21% mine tailing, it is ensured that one section strong magnetic tailings grade remains at low levels；
Second step：Weak magnetic concentrate selection and the closed circuit classifying grinding of high intensity magnetic separation concentrate Jing two-stage nitration to -0.074mm grades account for 80%, then with the selected iron ore concentrate finished product for obtaining more than the Fe of a part of grade 65% of two-stage nitration low intensity magnetic separation and the strong magnetic of two-stage nitration, the wherein selected iron ore concentrate yield of the strong magnetic of two-stage nitration accounts for the 29.5% of raw ore, accounts for the 75.74% of the total concentrate of whole process；
3rd step：The selected mine tailing of the strong magnetic of two-stage nitration again scan by the strong magnetic of Jing two-stage nitration, and selected with reverse flotation after the strong magnetic scavenger concentrate of two-stage nitration is concentrated, reverse flotation obtains the iron ore concentrate finished product that another part grade is 64.96%.
Wherein, one section of high intensity magnetic separation slightly sweeps using one in the method for the first step to the 3rd step, and two-stage nitration high intensity magnetic separation single-minded is swept using one, it is ensured that whole process obtains higher recovery rate in ore-dressing；Due to high intensity magnetic separation operating cost it is low, high intensity magnetic separation has been abandoned most of mine tailing and drawn most of concentrate in advance, and the strong magnetic scavenger concentrate of two-stage nitration for only accounting for raw ore 12% enters people's reverse flotation work, due to the operating cost of reverse flotation it is higher, the ore deposit amount for entering people's reverse flotation is fewer, and full-range production cost is lower.
Embodiment described above is only that the preferred embodiment of the present invention is described, and not the spirit and scope of the present invention are defined.On the premise of without departing from design concept of the present invention; various modifications and improvement that this area ordinary person makes to technical scheme; protection scope of the present invention all should be dropped into, the technology contents that the present invention is claimed all have been recorded in detail in the claims.
Claims (2)
1. in a kind of iron mine speculum iron beneficiation method, it is characterised in that：Comprise the following steps：
The first step：Mono- section of closed circuit grinding classification of raw ore Iron grade 31.65%Fe, Jing accounts for 50% to -0.074mm grades, and with weak magnetic separator a small amount of bloodstone is selected, and carries out one roughing with intensity magnetic separator and once purging selection abandons in advance yield for 43.00%, and grade is 9.21% mine tailing；
Second step：Weak magnetic concentrate selection and the closed circuit classifying grinding of high intensity magnetic separation concentrate Jing two-stage nitration to -0.074mm grades account for 80%, then with the selected iron ore concentrate finished product for obtaining more than the Fe of a part of grade 65% of two-stage nitration low intensity magnetic separation and the strong magnetic of two-stage nitration, the wherein selected iron ore concentrate yield of the strong magnetic of two-stage nitration accounts for the 29.5% of raw ore, accounts for the 75.74% of the total concentrate of whole process；
3rd step：The selected mine tailing of the strong magnetic of two-stage nitration again scan by the strong magnetic of Jing two-stage nitration, and selected with reverse flotation after the strong magnetic scavenger concentrate of two-stage nitration is concentrated, reverse flotation obtains the iron ore concentrate finished product that another part grade is 64.96%.
2. in iron mine according to claim 1 speculum iron beneficiation method, it is characterised in that：One section of high intensity magnetic separation slightly sweeps using one in the method for the first step to the 3rd step, and two-stage nitration high intensity magnetic separation single-minded is swept using one.
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| CN201510757464.1A CN106669966A (en) | 2015-11-10 | 2015-11-10 | Beneficiation method for specular hematite in iron ore |
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| CN201510757464.1A CN106669966A (en) | 2015-11-10 | 2015-11-10 | Beneficiation method for specular hematite in iron ore |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108654833A (en) * | 2018-05-09 | 2018-10-16 | 东北大学 | A kind of polypropylene carboxylic acid pretreatment-abnormity medium magnetic separation process |
| CN110142134A (en) * | 2019-05-16 | 2019-08-20 | 辽宁万隆科技研发有限公司长沙分公司 | A kind of method of iron ore country rock comprehensive utilization |
-
2015
- 2015-11-10 CN CN201510757464.1A patent/CN106669966A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108654833A (en) * | 2018-05-09 | 2018-10-16 | 东北大学 | A kind of polypropylene carboxylic acid pretreatment-abnormity medium magnetic separation process |
| CN110142134A (en) * | 2019-05-16 | 2019-08-20 | 辽宁万隆科技研发有限公司长沙分公司 | A kind of method of iron ore country rock comprehensive utilization |
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