CN103127978A - Bauxite grinding system equipment and grinding process - Google Patents
Bauxite grinding system equipment and grinding process Download PDFInfo
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- CN103127978A CN103127978A CN2011103949626A CN201110394962A CN103127978A CN 103127978 A CN103127978 A CN 103127978A CN 2011103949626 A CN2011103949626 A CN 2011103949626A CN 201110394962 A CN201110394962 A CN 201110394962A CN 103127978 A CN103127978 A CN 103127978A
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Abstract
The invention discloses bauxite grinding system equipment and a grinding process. According to the bauxite grinding system equipment, a high-position feeding bin (1) is connected with a high-pressure roller mill (2) which is connected with a distributor (7), and a rim material outlet of the distributor (7) is connected with a rim material circulating system (3). The rim material circulating system (3) comprises a rim material cutting machine and a bucket type lifter which is connected with the high-position feeding bin (1). The pre-grinding technological process in which the high-pressure roller mill is used as main equipment is added into a bauxite pulp preparing system, ore granularity after roller milling is lowered, and meanwhile an ore grading system is added, and parts of ores after roller milling are directly used for preparing qualified ore pulp. The bauxite grinding system equipment and the grinding process have the advantages that the Bond work index of the ores after roller milling is lowered, so that energy consumption of the whole ore pulp preparing system is lowered, more crushing and less grinding are achieved, the granularity of the ground ores is lowered, and accordingly the capacity of a grinding machine set can be improved.
Description
Technical field
The bauxite that the present invention relates in a kind of alumina producing grinds workshop section's equipment and grinds flow process.
Background technology
The ore pulp preparation system of bauxite is one of important step of process for making alumina, and the energy consumption of this system accounts for suitable proportion in full factory energy consumption.Broken and basic procedure that grind for ore is at present: single stage crushing → two-stage crushing → three section fragmentation → aluminium ore homogenizing → raw material grinds." single stage crushing (coarse crushing) " is positioned at the mine, ore grain size after fragmentation is generally 200mm, " two-stage crushing (in broken) " is positioned at mine or alumina producer, ore grain size after fragmentation is 60～70mm, " three sections fragmentations (in small, broken bits) " are positioned at mine or alumina producer, and the ore grain size after fragmentation is 15～25mm.Ore after fragmentation enters that the homogenizing stockyard is stored up, after homogenizing, be sent to " raw material grinding mill " workshop section and grind and become qualified ore pulp.There are the bauxite ore particles alligatoring in " three sections fragmentations (in small, broken bits) " of prior art, " raw material grinding mill " workshop section, and production capacity is not high, the shortcomings such as energy consumption height.
Summary of the invention
The technical problem to be solved in the present invention is, grinding system equipment and adopting this system equipment to grind flow process of a kind of bauxite is provided, this system equipment and grind flow process and can make the further refinement of the bauxite ore particles that enters the raw material grinding mill unit, improve the production capacity of raw material grinding mill unit, and can reduce the energy consumption of whole ore pulp preparation system, the bauxite ore particles alligatoring that exists to overcome prior art, production capacity is not high, the deficiency of energy consumption height.
In order to solve described technical problem, bauxite milling system equipment of the present invention by the following technical solutions: high-order feeding feed bin is connected with high-pressure roller mill, and high-pressure roller mill is connected with tripper, and the rim charge outlet of tripper is connected with rim charge circulating system.Rim charge circulating system comprises rim charge cutting machine, bucket elevator, and bucket elevator is connected with high-order feeding feed bin.
The middle material outlet of tripper is connected with the ore classification system, and the ore classification system is connected with the finished product pulp tank, and the finished product pulp tank is connected with the finished product ore slurry pump.
it is as follows that employing bauxite milling system equipment of the present invention grinds flow process: the ore after fragmentation is delivered to the high-order feeding bin that is positioned at the high-pressure roller mill top through bucket elevator, ore after compacting enters roller mill uniformly, after the lamination fragmentation, between two rollers (stationary roll and movable roll), the ore (hereinafter to be referred as " middle material ") at middle part enters follow-up workshop section as finished product, the ore of avris between two rollers (hereinafter to be referred as " rim charge ") is according to the demand of follow-up workshop section, can select directly to deliver to follow-up workshop section as finished product, also can again be sent to the roller mill porch and again carry out the roller mill.Need to prove, 15%～20% ore grain size is being arranged in the finished product after roll-in below 74 μ m, belonged to qualified ore, it is qualified ore powder, this part powder can be selected by increase the classification operation in above-mentioned flow process, directly enter the finished product pulp tank, no longer enter raw material grinding mill, thereby reduce the load of raw material grinding machine unit.
High-pressure roller mill is the energy-efficient equipment with " lamination is broken " principle work, and this type equipment is static pressure crushing to material enforcement, is the mutual pulverizing between material and material, there is no fierce collision and impacts.High-pressure roller mill mainly is comprised of systems such as frame, stationary roll, movable roll, bearing, transmission, feeding, hydraulic pressure, lubricated and controls.For guaranteeing feed pressure, need above the equipment charging aperture, ore storage bin to be installed, and require to have the stock column of certain altitude.During work, by two cover drive systems opposite direction rotatings, material feeds between two rollers from the feed ore storage bin of top respectively for stationary roll and movable roll, and adjustable feeding device is controlled feeding coal.Keep certain interval between two rollers, the movable roll bearing block can slide between frame, makes movable roll a small amount of mobile along with the fluctuation of feeding coal or material properties.The High Pressure that hydraulic system produces is under high pressure fully compressed the space of storeroom on roll bearing seat, thereby realizes the broken of wholegrain level or form micro-crack in granule interior.
Technical characterstic of the present invention
1) ratio of reduction of high-pressure roller mill is large.After adopting high-pressure roller mill, can cancel existing three sections fragmentations (in small, broken bits) workshop sections.
2) the ore Bond work index after high pressure roller mill can reduce by 20～25%, makes the energy consumption of whole raw material system significantly reduce, and then makes aluminium oxide become to produce cost decline, also meets the policy requirements of country's " energy-saving and emission-reduction " simultaneously.
3) ore grain size after the roller mill reduces, and has realized " how broken few mill ", can make the production capacity of grinding machine improve 30～45%, and then reduce the quantity of grinding machine unit.
4) 15%～20% ore grain size is arranged in finished product below 74 μ m, can directly prepare the finished product ore pulp after this part ore is classified, reduced and enter to grind ore amount.
5) high-pressure roller mill is reliable, and is easy to maintenance.The running rate of roller mill can reach 95% and can be complementary with the running rate of whole alumina system.Simultaneously, material squeezes broken by static pressure, there is no fierce collision and impacts, and noise is lower.
6) high pressure roller mill system floor space is little, and auxiliary facility is simple, can reduce the floor space of alumina producer, meets national relevant policies requirement.
In sum, in traditional bauxite ore pulp preparation system, increase the ore pre-grinding system equipment take high-pressure roller mill as capital equipment and grind flow process, still modernizing and expanding the existing factory for the construction of new factory all has larger meaning.
Description of drawings
Fig. 1 is technological process of the present invention (containing the system equipment that flow process adopts) schematic diagram, does not comprise the flow process of ore classification system in this figure;
Fig. 2 is another technological process of the present invention (containing the system equipment that flow process adopts) schematic diagram, comprises the flow process of ore classification system in this figure.
The high-order feeding bin of being labeled as in accompanying drawing: 1-, 2-high-pressure roller mill, 3-rim charge circulating system, 4-ore classification system, 5-finished product pulp tank, 6-finished product ore slurry pump.
The specific embodiment
, be described in further detail in aluminum oxide production process of the present invention, high-pressure roller mill being applied to bauxite milling system equipment and grinding flow process below in conjunction with drawings and Examples, but not as the present invention being done the foundation of any restriction.
Embodiment one: bauxite milling system equipment is: high-order feeding bin 1 is connected with high-pressure roller mill 2, and high-pressure roller mill 2 is connected with tripper 7, and the rim charge outlet of tripper 7 is connected with rim charge circulating system 3.Rim charge circulating system 3 comprises rim charge cutting machine, bucket elevator, and bucket elevator is connected with high-order feeding bin 1.
Adopting the flow process that grinds of bauxite milling system equipment is that (flow process is seen accompanying drawing 1.), in traditional ore pulp preparation system after crushing section, raw material increases the ore pre-grinding flow process take high-pressure roller mill as capital equipment before grinding workshop section.The idiographic flow of pre-grinding workshop section is: the ore after fragmentation is delivered to the high-order feeding bin 1 that is positioned at high-pressure roller mill 2 tops through bucket elevator, ore after compacting enters high-pressure roller mill 1 uniformly, after the lamination fragmentation, between two rollers (stationary roll and movable roll), the ore (hereinafter to be referred as " middle material ") at middle part enters follow-up workshop section as finished product, the ore of avris between two rollers (hereinafter to be referred as " rim charge ") is according to the demand of follow-up workshop section, can select directly to deliver to follow-up workshop section as finished product, also can again be sent to the roller mill porch and again carry out the roller mill.Need to prove, 15%～20% ore grain size is being arranged in the finished product after roll-in below 74 μ m, belonged to qualified ore, can this part ore be selected by increase the classification operation in above-mentioned flow process, directly enter the finished product pulp tank, no longer enter raw material grinding mill, thereby reduce the load of raw material grinding machine unit.
Embodiment two: bauxite milling system equipment also has on the basis of embodiment one: the middle material outlet of tripper 7 is connected with ore classification system 4, and ore classification system 4 is connected with finished product pulp tank 5, and finished product pulp tank 5 is connected with finished product ore slurry pump 6.
Adopt bauxite milling system equipment to grind flow process as follows: the ore after fragmentation enters high-order feeding feed bin 1 through bucket elevator, in the storehouse after of short duration storage, ore evenly enters high-pressure roller mill 2 and carries out roll-in, and " rim charge " after roll-in is sent to the charging bucket elevator through rim charge circulating system 3 and again enters high pressure roll press 1 and carry out roll-in; " middle material " after roll-in enters ore classification system 4 and carries out classification.The qualified ore of the raw ore slurry that can directly prepare in " middle material " sifts out in this system, after this part ore that sifts out enters finished product pulp tank 5 and circulating mother liquor mixes, be delivered to next workshop section (" raw material grinding mill " workshop section or " pre-desiliconizing " workshop section) through finished product ore slurry pump 6; The remainder ore of " middle material " is sent to next workshop section (" raw material grinding mill " workshop section or " aluminium ore homogenizing " workshop section) through bucket elevator.Pre-grinding workshop section flow process with the classification operation is seen accompanying drawing 2.
Claims (4)
1. bauxite milling system equipment, it is characterized in that: high-order feeding bin (1) is connected with high-pressure roller mill (2), and high-pressure roller mill (2) is connected with tripper (7), and the rim charge outlet of tripper (7) is connected with rim charge circulating system (3); Rim charge circulating system (3) comprises rim charge cutting machine, bucket elevator, and bucket elevator is connected with high-order feeding bin (1).
2. bauxite milling system equipment according to claim 1, it is characterized in that: the middle material outlet of tripper (7) is connected with ore classification system (4), ore classification system (4) is connected with finished product pulp tank (5), and finished product pulp tank (5) is connected with finished product ore slurry pump (6).
3. flow process that grinds that adopts bauxite milling system equipment claimed in claim 1, it is characterized in that: the ore after fragmentation is delivered to the high-order feeding bin (1) that is positioned at high-pressure roller mill (2) top through bucket elevator, ore after compacting enters high-pressure roller mill (2) uniformly, after the lamination fragmentation, between two rollers the ore at middle part namely " middle material " enter grinding machine workshop section as finished product; Between two rollers the ore of avris namely " rim charge " directly deliver to follow-up workshop section as finished product, perhaps be sent to high-pressure roller mill (2) porch and again carry out the roller mill.
4. employing bauxite milling system equipment according to claim 4 grinds flow process, it is characterized in that: between two rollers the ore at middle part namely " middle material " enter ore classification system (4) and sieve, the coarse fodder that obtains of screening goes to grinding machine workshop section, and the powder that screening obtains send finished product pulp tank (5) to make ore pulp and sent by the finished product ore slurry pump.
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| CN2011103949626A CN103127978A (en) | 2011-12-02 | 2011-12-02 | Bauxite grinding system equipment and grinding process |
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| CN2011103949626A CN103127978A (en) | 2011-12-02 | 2011-12-02 | Bauxite grinding system equipment and grinding process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934077A (en) * | 2014-04-04 | 2014-07-23 | 中国地质科学院郑州矿产综合利用研究所 | High-efficiency low-consumption ultrafine crushing-grinding process |
| CN105126957A (en) * | 2015-10-09 | 2015-12-09 | 河南东大矿业股份有限公司 | Crushing-grinding method for bauxite waste slag high-pressure rolling-grinding |
| CN105268531A (en) * | 2015-11-10 | 2016-01-27 | 桂林鸿程矿山设备制造有限责任公司 | External circulating movable powder processing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934077A (en) * | 2014-04-04 | 2014-07-23 | 中国地质科学院郑州矿产综合利用研究所 | High-efficiency low-consumption ultrafine crushing-grinding process |
| CN103934077B (en) * | 2014-04-04 | 2015-12-02 | 中国地质科学院郑州矿产综合利用研究所 | High-efficiency low-consumption ultrafine crushing-grinding process |
| CN105126957A (en) * | 2015-10-09 | 2015-12-09 | 河南东大矿业股份有限公司 | Crushing-grinding method for bauxite waste slag high-pressure rolling-grinding |
| CN105126957B (en) * | 2015-10-09 | 2017-10-03 | 河南东大科技股份有限公司 | A kind of broken mill method of bauxite waste residue high pressure roller mill |
| CN105268531A (en) * | 2015-11-10 | 2016-01-27 | 桂林鸿程矿山设备制造有限责任公司 | External circulating movable powder processing system |
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Application publication date: 20130605 |