CN103861711A - Ore grinding process for self-automatic grinding machine - Google Patents
Ore grinding process for self-automatic grinding machine Download PDFInfo
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- CN103861711A CN103861711A CN201410124484.0A CN201410124484A CN103861711A CN 103861711 A CN103861711 A CN 103861711A CN 201410124484 A CN201410124484 A CN 201410124484A CN 103861711 A CN103861711 A CN 103861711A
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Abstract
The invention discloses an ore grinding process for a self-automatic grinding machine. The process comprises the following steps: (1) controlling the aperture of a discharge hole of the self-automatic grinding machine to be smaller than 80mm, and leading materials of which the size fractions are less than 80mm out of the discharged materials; (2) arranging a double-layer screen outside the discharge hole, and grading the materials of which the size fractions are 30-80mm, 2.5-30mm and less than 2.5mm, and respectively leading the materials out; and (3) leading the materials of which the size fractions are 30-80mm into an ore grinding process in the subsequent operation as an ore grinding medium, returning the materials of which the size fractions are 2.5-30mm to the self-automatic grinding machine for cyclic re-grinding, and leading the materials of which the size fractions are less than 2.5mm to a coarse grinding device. The ore grinding process for the self-automatic grinding machine has the beneficial effects that the materials of which the size fractions are less than 80mm are discharged by controlling the size of the discharge hole of the self-automatic grinding machine, and the materials of which the size fractions are 30-80mm are screened by the double-layer screen to serve as the ore grinding medium in the ore grinding process in the subsequent operation, so that the problem that the self-automatic grinding machine is unreasonable is solved, and the consumption of steel ball media in the ore grinding operation is reduced.
Description
Technical field
The present invention relates to grinding process, relate in particular to the grinding process of semi-autogenous mill.
Background technology
The maximum feature of autogenous tumbling mill is the ore of the raw ore from stope or process coarse crushing etc. directly can be fed to grinding machine.Conventionally mineral feed grinding machine autogenous grinding by certain grain grade proportion.Autogenous tumbling mill account for the more than 20%～50% of product population by its content of material once can be ground into-0.074mm.Comminution ratio can reach 4000～5000, higher tens times than ball, rod mill.Autogenous tumbling mill is a kind of novel grinding attachment that has broken and two kinds of functions of grinding concurrently.It utilizes grinding charge material from as medium, is realized and being pulverized by mutual impact and ablation, and therefore autogenous tumbling mill gains the name.Autogenous tumbling mill is also called autogenous mill.Rubbing miner process difference, autogenous tumbling mill can be divided into two kinds of dry type (gas fall formula) and wet types (rushing down formula).China is widely used is at present wet autogenous mill.
Autogenous tumbling mill has speed change and different capacity to determine two kinds of driving styles of rotating speed, and some autogenous tumbling mills are also equipped with inching gear.Cylindrical shell jacking system is equipped with for ease of maintenance; For large-sized grinder, the static resistance square while startup for eliminating, has adopted the modern advanced such as hydrostatic bearing, to guarantee that autogenous tumbling mill can safe handling.
Semi-Autogenously in autogenous tumbling mill, add a small amount of steel ball (being generally 2-8%) exactly, its result treatment ability can improve 10-30%, the Energy Intensity Reduction 10-20% of unit product, but wear liner increases by 15% relatively, and product fineness also chap is a little.
Semi-autogenous mill is synchronous machine drives, motor drives barrel to rotate by the transmission of driving section, in the time of barrel body rotation, be contained in abrasive media-steel ball in cylindrical shell and nugget under the effect of frictional force and centrifugal force, be thus lifted to certain altitude along with cylindrical shell revolution, then left according to certain linear velocity, ore is fallen additional crushing between the shock of steel ball and steel ball and steel ball and between steel ball and grinding machine and nugget and mill stripping effect and is pulverized, and by means of the impulse force of water, the qualified material being grated is sent outside cylindrical shell.
The chats of the current mine ore dressing of China is regrinded and is used steel ball as milling medium poor effect, is difficult to effectively fully monomer dissociation.
Chinese invention patent application numbers 201210032756.5 discloses " a kind of grinding process of magnesite ", raw ore enters autogenous tumbling mill or semi-autogenous mill ore grinding after coarse crushing, after ore pulp classification after ore grinding, be back to autogenous tumbling mill or semi-autogenous mill is regrinded, just reduce steel ball number, and the problem that the loss of unresolved semi-autogenous mill liner plate is large, equipment life is short, metal loss is large.
Summary of the invention
The technical problem to be solved in the present invention is that the hard rock of this difficult mill of the material of the 30-80mm grade in existing semi-autogenous mill is drawn, thereby the liner plate loss that is conducive to solve body is large, the service life of equipment, the problems such as equipment operation rate is low, metal loss is large provide a kind of grinding process of semi-autogenous mill for this reason.
Technical scheme of the present invention is: the grinding process of semi-autogenous mill, and it comprises the following steps: (1), the relief hole of semi-autogenous mill is controlled at below 80mm, draw the material of the following grade of 80mm in discharge; (2), at relief hole, double deck screen is set outward, the stock grading of 30-80mm, 30-2.5mm and the following grade of 2.5mm is drawn respectively; (3), the material of 30-80mm grade caused to next operation chats with belt regrind in ore grinding as milling medium, the material of 30-2.5mm grade is returned to semi-autogenous mill and recycles, the material of the following grade of 2.5mm is caused to corase grind.
The invention has the beneficial effects as follows by controlling Semi-Autogenous relief hole size material that double-deck screen shale shaker the sifts out 30-80mm grade milling medium in next chats Grinding procedure is drawn and passed through to the material of the following grade of 80mm in semi-autogenous mill, replace original steel ball milling medium, both solved Semi-Autogenous liner plate loss large, the service life of equipment, the problems such as equipment operation rate is low, metal loss is large, have reduced again the steel ball dielectric dissipation of chats grinding operation; Improve the grinding efficiency of Regrinding, reduce overground argillization; Avoid Regrinding steel ball to form Fe (OH) 3 at mineral surfaces, be conducive to improve the rate of recovery of association gold and silver.
Detailed description of the invention
Embodiment 1:(1), the relief hole of semi-autogenous mill is controlled at below 80mm, draw the material of 80mm grade in discharge; (2), at relief hole, double deck screen is set outward, the stock grading of 30-80mm, 30-2.5mm and the following grade of 2.5mm is drawn respectively; (3), the material of 30mm grade is caused in next operation chats ore grinding as milling medium with belt, the material of 30-2.5mm grade is returned to semi-autogenous mill and recycle, the material of the following grade of 2.5mm is caused to corase grind.
Embodiment 2:(1), the relief hole of semi-autogenous mill is controlled at below 80mm, draw the material of 80mm grade in discharge; (2), at relief hole, double deck screen is set outward, the stock grading of 30-80mm, 30-2.5mm and the following grade of 2.5mm is drawn respectively; (3), the material of 80mm grade is caused in next operation chats ore grinding as milling medium with belt, the material of 30-2.5mm grade is returned to semi-autogenous mill and recycle, the material of the following grade of 2.5mm is caused to corase grind.
Core of the present invention is creationary the material of the 30-80mm grade in semi-autogenous mill to be discharged for the milling medium of lower road chats Grinding procedure, replace traditional steel ball milling medium, and the material grinding efficiency of 30-80mm grade is equal to the steel ball of 20-60mm particle diameter, can be for the milling medium of next operation in ore grinding, be mainly used for coarse concentrate regrinding or chats is regrinded, most importantly regrind for chats.The benefit of doing is like this to extract the material that is difficult to broken 30-80mm grade in semi-autogenous mill on the one hand, avoids damaging liner plate, makes on the other hand the material of the 30-80mm grade of taking out be applied to lower road Grinding procedure as milling medium, has reduced the consumption of steel ball.
The present invention is mainly applicable to the carse, medium and small misproportion dissemination of valuable mineral, has corase grind and Regrinding in grinding process flow process.
The present invention is exemplarily described above in conjunction with the embodiments; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (1)
1. the grinding process of semi-autogenous mill, is characterized in that it comprises the following steps: (1), the relief hole of semi-autogenous mill is controlled at below 80mm, draw the material of the following grade of 80mm in discharge; (2), at relief hole, double deck screen is set outward, the stock grading of 30-80mm, 30-2.5mm and the following grade of 2.5mm is drawn respectively; (3), the material of 30-80mm grade is caused in next operation chats ore grinding as milling medium with belt, the material of 30-2.5mm grade is returned to semi-autogenous mill circulation and regrind, the material of the following grade of 2.5mm is caused to corase grind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410124484.0A CN103861711B (en) | 2014-03-31 | 2014-03-31 | The grinding process of semi-autogenous mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410124484.0A CN103861711B (en) | 2014-03-31 | 2014-03-31 | The grinding process of semi-autogenous mill |
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| CN103861711A true CN103861711A (en) | 2014-06-18 |
| CN103861711B CN103861711B (en) | 2015-11-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665081A (en) * | 2016-05-05 | 2016-06-15 | 江西理工大学 | Ore grinding technology for replacing vertical mill steel ball with semi-autogenous grinding hard rock |
| CN105944800A (en) * | 2016-05-17 | 2016-09-21 | 中国瑞林工程技术有限公司 | Ore grinding technology production method using hard rocks as ore grinding medium |
| CN108525835A (en) * | 2018-05-18 | 2018-09-14 | 玉溪大红山矿业有限公司 | A kind of method and its system of continuous removal semi-autogenous mill abrasion steel ball |
| CN111298906A (en) * | 2019-12-19 | 2020-06-19 | 安徽东巨新型建材有限公司 | Steel slag-based filling material levigating method |
Citations (6)
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|---|---|---|---|---|
| US5033682A (en) * | 1987-10-20 | 1991-07-23 | Ici Australia Operations Propreitary Limited | Grinding process |
| KR100486167B1 (en) * | 2004-12-17 | 2005-04-29 | 정규성 | System for crushing and grinding of matter construction waste and ore |
| CN2910356Y (en) * | 2006-02-16 | 2007-06-13 | 中国恩菲工程技术有限公司 | Semi-self-grinding ball mill for ores |
| CN101491789A (en) * | 2009-02-12 | 2009-07-29 | 中国瑞林工程技术有限公司 | Beneficiation process of mixed dregs using three copper smelting methods of flash smelting furnace, revolving furnace and depletion electric furnace |
| CN101507942A (en) * | 2009-03-12 | 2009-08-19 | 中信重工机械股份有限公司 | Detachable double-layer self-return screen of large-size autogenous mill |
| CN103357491A (en) * | 2013-08-08 | 2013-10-23 | 中冶北方（大连）工程技术有限公司 | Automatic hard rock returning device with semi-automatic grinding machine |
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2014
- 2014-03-31 CN CN201410124484.0A patent/CN103861711B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5033682A (en) * | 1987-10-20 | 1991-07-23 | Ici Australia Operations Propreitary Limited | Grinding process |
| KR100486167B1 (en) * | 2004-12-17 | 2005-04-29 | 정규성 | System for crushing and grinding of matter construction waste and ore |
| CN2910356Y (en) * | 2006-02-16 | 2007-06-13 | 中国恩菲工程技术有限公司 | Semi-self-grinding ball mill for ores |
| CN101491789A (en) * | 2009-02-12 | 2009-07-29 | 中国瑞林工程技术有限公司 | Beneficiation process of mixed dregs using three copper smelting methods of flash smelting furnace, revolving furnace and depletion electric furnace |
| CN101507942A (en) * | 2009-03-12 | 2009-08-19 | 中信重工机械股份有限公司 | Detachable double-layer self-return screen of large-size autogenous mill |
| CN103357491A (en) * | 2013-08-08 | 2013-10-23 | 中冶北方（大连）工程技术有限公司 | Automatic hard rock returning device with semi-automatic grinding machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665081A (en) * | 2016-05-05 | 2016-06-15 | 江西理工大学 | Ore grinding technology for replacing vertical mill steel ball with semi-autogenous grinding hard rock |
| CN105944800A (en) * | 2016-05-17 | 2016-09-21 | 中国瑞林工程技术有限公司 | Ore grinding technology production method using hard rocks as ore grinding medium |
| CN105944800B (en) * | 2016-05-17 | 2018-11-13 | 中国瑞林工程技术有限公司 | A kind of grinding process production method for making milling medium using hard rock |
| CN108525835A (en) * | 2018-05-18 | 2018-09-14 | 玉溪大红山矿业有限公司 | A kind of method and its system of continuous removal semi-autogenous mill abrasion steel ball |
| CN111298906A (en) * | 2019-12-19 | 2020-06-19 | 安徽东巨新型建材有限公司 | Steel slag-based filling material levigating method |
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| Publication number | Publication date |
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| CN103861711B (en) | 2015-11-18 |
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