CN106311445A - Crushing classification-ore grinding method for bauxite - Google Patents
Crushing classification-ore grinding method for bauxite Download PDFInfo
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- CN106311445A CN106311445A CN201510351809.3A CN201510351809A CN106311445A CN 106311445 A CN106311445 A CN 106311445A CN 201510351809 A CN201510351809 A CN 201510351809A CN 106311445 A CN106311445 A CN 106311445A
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Abstract
The invention relates to a crushing classification-ore grinding method for bauxite, in particular to a crushing classification-ore grinding method for accumulated bauxite and belongs to the technical field of aluminum oxide production. The accumulated cleaned ores are sieved through a high-frequency relaxation sieve, and plus-sieve ores enter a roller press; materials discharged from the roller press and undersize ores are jointly added to a ball mill, the materials discharged from the ball mill are treated through classification equipment, qualified ore pulp is obtained, and then the qualified ore pulp is conveyed to a pre-desiliconization process; the undersize ores can be controlled within the range from 5 mm to 10 mm in particle size and directly enter the ball mill, and the energy consumption of the ball mill is lowered by 20% to 30%; and material cakes squeezed by the roller press enter the ball mill, and the productivity of the ball mill is improved by 40% to 60%.
Description
Technical field
The present invention relates to a kind of bauxite classification-milling method, particularly relate to a kind of Accumulative Bauxite and crush classification-milling method, belong to technical field of alumina production.
Background technology
Present stage bauxite raw ore slurry preparation section flow process mostly is the two stage grinding flow process of rod mill+ball mill, and equipment investment is big, and ore grinding power consumption is high.According to document " the many broken mill new technology research less of bauxite " (light metal, 2001,10) mention: Ore Grin-ding energ7 substantially: explosion 3%～6%, broken 5%～7%, ore grinding 85%～90%, ore grinding energy consumption is much larger than broken, and the concept of " much broken and lessmill " thus produces.Along with scientific and technological progress, partial oxidation aluminium manufacturer introduces roll squeezer and replaces rod mill, owing to roll squeezer energy consumption is low, can make Ore internal generation crackle in small, broken bits, make grinding machine production capacity improve 45 ~ 60%, and energy consumption of unit product reduces by 20 ~ 25%.
But according to document " high-pressure roller mill is for the experimental study of bauxite and application " (light metal, 2014,3) report, roll squeezer pan feeding moisture content for high-moisture percentage Accumulative Bauxite, should not still use traditional rod milling+ball-milling technology higher than 7%.Accumulative Bauxite is divided into breeze felted Ore and clay gel junction type Ore, and the Accumulative Bauxite of China is mainly distributed on Guangxi, Yunnan, Guizhou and Sichuan etc. and saves.The usual clay content of this Ore is big, uses the operations such as coarse crushing, drum washer, screw classifying to wash away clay, obtains can be used for the clean ore deposit of Bayer process flow process, and moisture content is generally 8 ~ 15%.If using the raw ore slurry preparation flow of roll squeezer+ball mill, ore grinding energy consumption can be greatly reduced.
Summary of the invention
A kind of bauxite is provided to crush classification-milling method in order to solve the above-mentioned technical problem present invention, purpose is to make to clean ore deposit by Task-size Controlling to be suitable for roll squeezer, roll squeezer is used to replace rod mill, realize " much broken and lessmill ", can also control to enter the ore grain size of ball mill simultaneously, reduce roll squeezer and ball mill energy consumption, improve ball mill production capacity.
For reaching above-mentioned purpose, the present invention is achieved in that a kind of bauxite crushes classification-milling method, and accumulation type is cleaned ore deposit and first passed through the screening of high frequency flip flop screen, and on sieve, Ore enters roll squeezer；Joining in ball mill together with roll squeezer discharging Ore lower with sieve, ball mill discharging obtains qualified ore pulp through classifying equipoment, is sent to pre-desiliconizing operation.
Described high frequency flip flop screen screen mesh size 5 ~ 10mm.
Described high frequency flip flop screen is made up of 1 ~ 6 layer of screen cloth.
The described oversize moisture content entering roll squeezer can be reduced to less than 7%.
Described high frequency flip flop screen screen cloth material is high resilience polyurethane material.
Ore deposit moisture content 8% ~ 15% cleaned by described accumulation type.
Ore moisture content 9% ~ 11% under described sieve, the lower ore grain size of 99% sieve is less than 8mm.
The present invention, compared with tradition rod mill+ball mill technique, has the advantage that
(1)
Moisture enrichment under sieve on little granular ore is achieved by screening；
(2)
Oversize moisture content after separation is reduced to less than 7%, it is adaptable to roll squeezer；
(3)
Can control to sieve lower ore grain size 5 ~ 10mm, be directly entered ball mill, reduce ball mill energy consumption 20 ~ 30%；
(4)
Material cake after roll squeezer extruding enters ball mill, improves ball mill production capacity 40 ~ 60%.
Accompanying drawing explanation
Fig. 1 is present invention process flow chart
In figure: ore deposit cleaned by 1, accumulation type；2, high frequency flip flop screen；3, Ore on sieve；4, the lower Ore of sieve；5, roll squeezer；6, ball mill；7, classifying equipoment；8, qualified ore pulp.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited by embodiment.
Embodiment 1
A kind of bauxite crushes classification-milling method as shown in Figure 1, and ore deposit 1(moisture content 11% cleaned by accumulation type) first pass through high frequency flip flop screen 2 and sieve, the number of plies 1 layer, screen mesh size 5mm.Ore 3(moisture content 6% on sieve) enter roll squeezer 5, sieve classification efficiency 90%.Roll squeezer discharging and the lower Ore 4(moisture content 10% of sieve, 99% granularity is less than 6mm), join together in ball mill 6.Ball mill discharging obtains qualified ore pulp 8 through classifying equipoment 7.It is sent to pre-desiliconizing operation.
Embodiment 2
A kind of bauxite crushes classification-milling method as shown in Figure 1, and ore deposit 1(moisture content 8% cleaned by accumulation type) first pass through high frequency flip flop screen 2 and sieve, the number of plies 6 layers, screen mesh size 8mm.Ore 3(moisture content 5.4% on sieve) enter roll squeezer 5, sieve classification efficiency 92%.Roll squeezer discharging and the lower Ore 4(moisture content 9% of sieve, 99% granularity is less than 8mm), join together in ball mill 6.Ball mill discharging obtains qualified ore pulp 8 through classifying equipoment 7.It is sent to pre-desiliconizing operation.
Embodiment 3
A kind of bauxite crushes classification-milling method as shown in Figure 1, and ore deposit 1(moisture content 15% cleaned by accumulation type) first pass through high frequency flip flop screen 2 and sieve, the number of plies 4 layers, screen mesh size 10mm.Ore 3(moisture content 6.8% on sieve) enter roll squeezer 5, sieve classification efficiency 89%.Roll squeezer discharging and the lower Ore 4(moisture content 11% of sieve, 99% granularity is less than 7mm), join together in ball mill 6.Ball mill discharging obtains qualified ore pulp 8 through classifying equipoment 7.It is sent to pre-desiliconizing operation.
Claims (7)
1. a bauxite crushes classification-milling method, it is characterised in that accumulation type is cleaned ore deposit and first passed through the screening of high frequency flip flop screen, and on sieve, Ore enters roll squeezer；Joining in ball mill together with roll squeezer discharging Ore lower with sieve, ball mill discharging obtains qualified ore pulp through classifying equipoment, is sent to pre-desiliconizing operation.
A kind of bauxite the most according to claim 1 crushes classification-milling method, it is characterised in that described high frequency flip flop screen screen mesh size 5 ~ 10mm.
A kind of bauxite the most according to claim 1 crushes classification-milling method, it is characterised in that described high frequency flip flop screen is made up of 1 ~ 6 layer of screen cloth.
A kind of bauxite the most according to claim 1 crushes classification-milling method, it is characterised in that the described oversize moisture content entering roll squeezer can be reduced to less than 7%.
A kind of bauxite the most according to claim 1 crushes classification-milling method, it is characterised in that described high frequency flip flop screen screen cloth material is high resilience polyurethane material.
A kind of bauxite the most according to claim 1 crushes classification-milling method, it is characterised in that ore deposit moisture content 8% ~ 15% cleaned by described accumulation type.
A kind of bauxite the most according to claim 1 crushes classification-milling method, it is characterised in that Ore moisture content 9% ~ 11% under described sieve, and the lower ore grain size of 99% sieve is less than 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510351809.3A CN106311445A (en) | 2015-06-24 | 2015-06-24 | Crushing classification-ore grinding method for bauxite |
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| CN201510351809.3A CN106311445A (en) | 2015-06-24 | 2015-06-24 | Crushing classification-ore grinding method for bauxite |
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| CN106311445A true CN106311445A (en) | 2017-01-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262224A (en) * | 2017-07-31 | 2017-10-20 | 长沙矿冶研究院有限责任公司 | A kind of zinc oxygen leaching method for preparing raw material and two sections of vertical stirring mill series connection open-circuit grinding systems |
| CN113070151A (en) * | 2021-03-18 | 2021-07-06 | 沈阳盛世五寰科技有限公司 | Crushing and grading process for reducing processing cost of magnetic ore |
| CN114669388A (en) * | 2022-04-19 | 2022-06-28 | 安徽马钢矿业资源集团姑山矿业有限公司 | Pre-screening device applied to semi-autogenous grinding and screening process thereof |
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| CN101693221A (en) * | 2009-10-21 | 2010-04-14 | 长沙有色冶金设计研究院 | Ore-washing method of accumulative bauxite with high mud and high viscocity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262224A (en) * | 2017-07-31 | 2017-10-20 | 长沙矿冶研究院有限责任公司 | A kind of zinc oxygen leaching method for preparing raw material and two sections of vertical stirring mill series connection open-circuit grinding systems |
| CN113070151A (en) * | 2021-03-18 | 2021-07-06 | 沈阳盛世五寰科技有限公司 | Crushing and grading process for reducing processing cost of magnetic ore |
| CN114669388A (en) * | 2022-04-19 | 2022-06-28 | 安徽马钢矿业资源集团姑山矿业有限公司 | Pre-screening device applied to semi-autogenous grinding and screening process thereof |
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Application publication date: 20170111 |