CN102228889A - Novel magnetite two-stage closed-circuit and two-stage pre-selection crushing process - Google Patents
Novel magnetite two-stage closed-circuit and two-stage pre-selection crushing process Download PDFInfo
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- CN102228889A CN102228889A CN2010102216642A CN201010221664A CN102228889A CN 102228889 A CN102228889 A CN 102228889A CN 2010102216642 A CN2010102216642 A CN 2010102216642A CN 201010221664 A CN201010221664 A CN 201010221664A CN 102228889 A CN102228889 A CN 102228889A
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Abstract
The invention relates to the technical field of magnetite beneficiation, and in particular relates to a novel magnetite two-stage closed-circuit and two-stage pre-selection crushing process. The novel magnetite two-stage closed-circuit and two-stage pre-selection crushing process comprises the following steps of: carrying out coarse crushing on magnetite, conveying coarse-crushed discharge material to a dry magnetic pulley, conveying separated dry magnetic pulley concentrate to a vibrating sieve for classification, discarding separated dry magnetic pulley waste rock, conveying plus sieve products of the vibrating sieve to medium crushing and returning the medium-crushed products to the vibrating sieve, and is characterized by conveying the minus sieve products of the vibrating sieve to a dry magnetic separator for separating dry magnetic separator concentrate and dry magnetic separator waste rock, conveying the dry magnetic separator concentrate used as the crushed final product to ore grinding process and discarding the dry magnetic separator waste rock. The novel magnetite two-stage closed-circuit and two-stage pre-selection crushing process provided by the invention has reasonable process and obvious effects in energy saving and consumption reducing, improves the economic benefits of concentration plants, and annually saves **** yuan on the basis of saving *** yuan per ton of ore.
Description
Technical field
The present invention relates to the magnetite separation technical field, two section one broken new technology of closed circuit two sections preliminary elections of particularly a kind of magnetic iron ore.
Background technology
In recent years along with the mine to deep mining, the orebody mining condition runs down, rock intercalation increases, ore output grade descends.Since the rock of sneaking in a large number through broken, sort, the last person causes dressing expenses to increase, and rock easy argillization in grinding process, the raising of restriction iron concentrate grade.If low to grade, mix the big ore of rock and give up, will cause that the rate of extraction is low, stripping-to-ore ratio big, cost up, the wasting of resources, and can not satisfy the demand of ore dressing plant ore amount for the ore deposit ability.Therefore in order before ore grinding, to reject abandoned mine, improve and go into to grind grade, realize the energy-saving and cost-reducing of ore dressing plant, reduce beneficiation cost, adopt dry type magnetic pulley preliminary election technology that magnetic iron ore is realized throwing in advance tail, this technology be in crushing operation thick broken or in broken back add the dry type magnetic pulley, realizes two sections or three section one technological process that closed circuit coarse grain one is thrown tail or two throwing tails.
The shortcoming of dry type magnetic pulley is can't sorting for the particulate that is mixed in the coarse grain.This kind crushing process still can't satisfy the selected grade of ore grinding for the lower magnetic ore deposit of head grade.Cause that qualified gangue enters ore grinding in the ore after the fragmentation, increase dressing expenses and use.
Summary of the invention
The invention provides two section one broken new technology of closed circuit two sections preliminary elections of a kind of magnetic iron ore, purpose is to reject abandoned mine before ore grinding to greatest extent, improves and goes into to grind grade, realizes the energy-saving and cost-reducing of ore dressing plant, reduces beneficiation cost.
The objective of the invention is to realize by following technical proposals:
Two section one broken new technology of closed circuit two sections preliminary elections of a kind of magnetic iron ore of the present invention, comprise coarse crushing, the discharge of coarse crushing is sent into the dry type magnetic pulley, the dry type magnetic pulley concentrate that sub-elects enters the vibratory sieve classification, the dry type magnetic pulley barren rock that sub-elects is abandoned, the oversize of vibratory sieve enters middle fragmentation, middle crushed product returns vibratory sieve, the undersize that it is characterized in that described vibratory sieve enters dry-type magnetic extractor, sub-elect dry-type magnetic extractor concentrate and dry-type magnetic extractor barren rock, the dry-type magnetic extractor concentrate is sent to ore grinding as the final products of fragmentation, and the dry-type magnetic extractor barren rock is abandoned.
The characteristics of two section one broken new technology of closed circuit two sections preliminary elections of magnetic iron ore of the present invention are to adopt two section one closed circuit, two sections preliminary election flow process, before ore grinding, reject abandoned mine to greatest extent, improve the grade of going into ore grinding, reduce and go into the mill amount, the purpose that reach energy-saving and cost-reducing, reduces beneficiation cost.
Technology of the present invention is reasonable, and energy conservation and consumption reduction effects is obvious, has improved the economic benefit in ore dressing plant, in 100 yuan of ore saving per ton, and 1,000 ten thousand yuan of year saving.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
As shown in Figure 1, two section one broken new technology of closed circuit two sections preliminary elections of a kind of magnetic iron ore of the present invention, comprise coarse crushing, the discharge of coarse crushing is sent into the dry type magnetic pulley, the dry type magnetic pulley concentrate that sub-elects enters the vibratory sieve classification, the dry type magnetic pulley barren rock that sub-elects is abandoned, the oversize of vibratory sieve enters middle fragmentation, middle crushed product returns vibratory sieve, the undersize that it is characterized in that described vibratory sieve enters dry-type magnetic extractor, sub-elect dry-type magnetic extractor concentrate and dry-type magnetic extractor barren rock, the dry-type magnetic extractor concentrate is sent to ore grinding as the final products of fragmentation, and the dry-type magnetic extractor barren rock is abandoned.
The characteristics of two section one broken new technology of closed circuit two sections preliminary elections of magnetic iron ore of the present invention are to adopt two section one closed circuit, two sections preliminary election flow process, before ore grinding, reject abandoned mine to greatest extent, improve the grade of going into ore grinding, reduce and go into the mill amount, the purpose that reach energy-saving and cost-reducing, reduces beneficiation cost.
Technology of the present invention is reasonable, and energy conservation and consumption reduction effects is obvious, has improved the economic benefit in ore dressing plant, in 100 yuan of ore saving per ton, and 1,000 ten thousand yuan of year saving.
Claims (1)
1. two section one broken new technology of closed circuit two sections preliminary elections of a magnetic iron ore, comprise coarse crushing, the discharge of coarse crushing is sent into the dry type magnetic pulley, the dry type magnetic pulley concentrate that sub-elects enters the vibratory sieve classification, the dry type magnetic pulley barren rock that sub-elects is abandoned, the oversize of vibratory sieve enters middle fragmentation, middle crushed product returns vibratory sieve, the undersize that it is characterized in that described vibratory sieve enters dry-type magnetic extractor, sub-elect dry-type magnetic extractor concentrate and dry-type magnetic extractor barren rock, the dry-type magnetic extractor concentrate is sent to ore grinding as the final products of fragmentation, and the dry-type magnetic extractor barren rock is abandoned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102216642A CN102228889A (en) | 2010-07-09 | 2010-07-09 | Novel magnetite two-stage closed-circuit and two-stage pre-selection crushing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102216642A CN102228889A (en) | 2010-07-09 | 2010-07-09 | Novel magnetite two-stage closed-circuit and two-stage pre-selection crushing process |
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| Publication Number | Publication Date |
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| CN102228889A true CN102228889A (en) | 2011-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102216642A Pending CN102228889A (en) | 2010-07-09 | 2010-07-09 | Novel magnetite two-stage closed-circuit and two-stage pre-selection crushing process |
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| CN (1) | CN102228889A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012112093A1 (en) * | 2012-12-11 | 2014-06-12 | Thyssenkrupp Resource Technologies Gmbh | Process and installation for the treatment of ore-containing material |
| CN107262276A (en) * | 2017-07-11 | 2017-10-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry type of fine fraction magnetic iron ore throws useless technique |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219413A (en) * | 2008-01-22 | 2008-07-16 | 福州昌晖自动化系统有限公司 | Technique for manufacturing hyperpure iron extract |
| CN201291149Y (en) * | 2008-10-31 | 2009-08-19 | 鞍钢集团矿业公司 | Two-stage double closed circuit crushing screening facilites |
| CN101559403A (en) * | 2009-05-31 | 2009-10-21 | 安徽大昌矿业集团有限公司 | Method for concentrating extremely low-grade refractory magnetite |
| CN101579654A (en) * | 2009-05-26 | 2009-11-18 | 包头市石宝铁矿集团有限责任公司 | Iron ore powder mineral dressing process |
-
2010
- 2010-07-09 CN CN2010102216642A patent/CN102228889A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219413A (en) * | 2008-01-22 | 2008-07-16 | 福州昌晖自动化系统有限公司 | Technique for manufacturing hyperpure iron extract |
| CN201291149Y (en) * | 2008-10-31 | 2009-08-19 | 鞍钢集团矿业公司 | Two-stage double closed circuit crushing screening facilites |
| CN101579654A (en) * | 2009-05-26 | 2009-11-18 | 包头市石宝铁矿集团有限责任公司 | Iron ore powder mineral dressing process |
| CN101559403A (en) * | 2009-05-31 | 2009-10-21 | 安徽大昌矿业集团有限公司 | Method for concentrating extremely low-grade refractory magnetite |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012112093A1 (en) * | 2012-12-11 | 2014-06-12 | Thyssenkrupp Resource Technologies Gmbh | Process and installation for the treatment of ore-containing material |
| DE102012112093B4 (en) * | 2012-12-11 | 2016-12-15 | Thyssenkrupp Industrial Solutions Ag | Process and installation for the treatment of ore-containing material |
| CN107262276A (en) * | 2017-07-11 | 2017-10-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry type of fine fraction magnetic iron ore throws useless technique |
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Application publication date: 20111102 |