CN212374899U - Device for reducing alkali liquor impurities in Bayer process production of aluminum hydroxide - Google Patents
Device for reducing alkali liquor impurities in Bayer process production of aluminum hydroxide Download PDFInfo
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- CN212374899U CN212374899U CN202020497585.3U CN202020497585U CN212374899U CN 212374899 U CN212374899 U CN 212374899U CN 202020497585 U CN202020497585 U CN 202020497585U CN 212374899 U CN212374899 U CN 212374899U
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- alkali liquor
- aluminum hydroxide
- bayer process
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Abstract
The utility model is suitable for an aluminium hydroxide production facility technical field provides a reduce device of alkali lye impurity during Bayer process production aluminium hydroxide, including rotating electrical machines, seal cap, helical agitator, nut, cartridge filter, double-screw bolt fixed part, first pressure flange, alkali lye entry, pipeline, second pressure flange, alkali lye export, dome cover, drain pipe and valve, the utility model discloses a cooperation between above each component can realize reducing the impurity of alkali lye during Bayer process production aluminium hydroxide.
Description
Technical Field
The utility model belongs to the technical field of aluminium hydroxide production facility, especially, relate to the device that reduces alkali lye impurity when Bayer process production aluminium hydroxide.
Background
The bayer process is a widely used industrial chemical process for producing alumina from bauxite. In 1887, the invention was invented by austria engineers karl joseph bayer, whose basic principle was to convert aluminum hydroxide into sodium aluminate with concentrated sodium hydroxide solution, to re-precipitate aluminum hydroxide by dilution and addition of aluminum hydroxide seed crystal, and to reuse the remaining sodium hydroxide solution for the treatment of the next batch of bauxite, thus realizing continuous production. Today, 95% of the world's aluminum companies are producing alumina using the bayer process.
The bayer process comprises two main processes, namely two patents proposed by bayer, one is that it is found that sodium aluminate solution with a molar ratio of sodium oxide to aluminum oxide of 1.8 is precipitated slowly as aluminum hydroxide at normal temperature, as long as aluminum hydroxide is added as seed crystal and stirring is continued, until the molar ratio of sodium oxide to aluminum oxide is increased to 6, most of aluminum hydroxide solution is already precipitated, and alumina hydrate in bauxite can be dissolved out during heating, namely, the bauxite is dissolved out by using seed precipitation liquor, and the two processes are alternately used to treat bauxite in batches, so that pure aluminum hydroxide products are obtained, and a so-called bayer process cycle is formed.
In the lye of the Bayer process cycle, some Ba is contained+、Ca+The impurities of the alkaline liquor can influence the subsequent production of the aluminum hydroxide, so that the produced product is doped, generally by adding Na2CO3Mixing the solutions to precipitate CaCO and BaCO3Precipitated and then filtered.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device for reducing alkali liquor impurities in the Bayer process of producing aluminum hydroxide, which aims to solve the problem that the alkali liquor provided in the background technology is doped with precipitation substances.
The utility model is realized in such a way, the device for reducing alkali liquor impurities in the Bayer process of producing aluminum hydroxide comprises a rotating motor, a sealing top cover, a spiral stirrer, a nut, a filter cartridge, a stud fixing part, a first pressure flange, an alkali liquor inlet, a pipeline, a second pressure flange, an alkali liquor outlet, a dome cover, a drain pipe and a valve, wherein the left side on the pipeline is provided with the alkali liquor inlet, the right side on the pipeline is provided with the alkali liquor outlet, one end of the pipeline, which is far away from the alkali liquor outlet, is fixedly provided with four stud fixing parts on the pipeline, each stud fixing part is fixedly provided with the stud, one end of the pipeline, which is far away from the alkali liquor outlet, is provided with the sealing top cover, the sealing top cover is fixed by matching the stud with the nut, and the rotating motor is fixedly arranged on the sealing top, the utility model discloses a valve, including the pipeline, the pipeline is placed inside the filter cartridge, the spiral agitator set up in the pipeline, the rotating electrical machines with the spiral agitator is connected, one has been placed to pipeline inside the cartridge filter, the pipeline is kept away from the one end of alkali lye entry is connected and is fixed with one the dome cover, the geometric center department of dome cover is connected with one the drain pipe, install one on the drain pipe the valve, the alkali lye entry passes through first pressure flange is connected with the alkali lye inflow pipeline of production aluminium hydroxide, the alkali lye export is passed through second pressure flange is connected with the alkali lye outflow pipeline of production aluminium hydroxide.
Furthermore, the aperture size of the uniformly distributed filter holes on the filter cartridge is 1 mm.
Still further, the seal cap, the filter cartridge, the conduit, and the dome are made of glass fiber reinforced plastic.
Further, the connection of the seal cap and the pipe is sealed by a circular sealing sheet.
Furthermore, the spiral stirrer is made of nickel alloy.
Furthermore, one end of the filter cylinder is provided with a circular ring piece which is attached to the inner wall of the pipeline.
About implementing the utility model discloses a beneficial technological effect does: the utility model discloses a cooperation between each component among the above technical scheme can realize reducing the impurity of alkali lye when Bayer process production aluminium hydroxide.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is an exploded view of the present invention;
fig. 3 is a schematic sectional structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-3, the utility model relates to a device for reducing alkali liquor impurities during the production of aluminum hydroxide by Bayer process, comprising a rotary motor 1, a sealing top cover 2, a helical agitator 3, a nut 4, a filter cartridge 5, a stud 6, a stud fixing part 7, a first pressure flange 8, an alkali liquor inlet 9, a pipeline 10, a second pressure flange 11, an alkali liquor outlet 12, a dome cover 13, a drain pipe 14 and a valve 15, wherein the left side of the pipeline 10 is provided with the alkali liquor inlet 9, the right side of the pipeline 10 is provided with the alkali liquor outlet 12, four stud fixing parts 7 are fixed on the pipeline 10 at the end of the pipeline 10 far away from the alkali liquor outlet 12, a stud 6 is fixed on each stud fixing part 7, a sealing top cover 2 is placed at the end of the pipeline 10 far away from the alkali liquor outlet 12, the sealing top cover 2 is fixed by matching the stud 6 with the nut 4, a rotary, helical agitator 3 sets up in pipeline 10, rotating electrical machines 1 is connected with helical agitator 3, a cartridge filter 5 has been placed to pipeline 10 inside, pipeline 10 is kept away from the one end connection of alkali lye entry 9 and is fixed with a dome lid 13, the geometric center department of dome lid 13 is connected with a drain pipe 14, install a valve 15 on the drain pipe 14, alkali lye entry 9 is connected through the alkali lye inflow pipeline of first pressure flange 8 with production aluminium hydroxide, alkali lye export 12 is connected through the alkali lye outflow pipeline of second pressure flange 11 with production aluminium hydroxide.
The aperture size of the filter holes evenly distributed on the filter cartridge 5 is 1 mm. So as to filter out the precipitated particles with the diameter of more than 1 mm.
The material of the seal cap 2, filter cartridge 5, conduit 10 and dome 13 is glass reinforced plastic. The glass fiber reinforced plastic has good alkali corrosion resistance.
The connection of the seal cap 2 to the pipeline 10 is sealed by a circular sealing sheet. Preventing the alkali liquor from leaking.
The spiral stirrer 3 is made of nickel alloy. The nickel alloy has good alkali corrosion resistance.
One end of the filter cartridge 5 is provided with a circular ring piece which is attached to the inner wall of the pipeline 10. The lye containing the precipitated particles is prevented from passing the filter cartridge 5 without being filtered.
In practical application, alkali liquor enters from the alkali liquor inlet 9, the rotating motor 1 is started, and the rotating motor 1 drives the spiral stirrer 3 to rotate so as to push the alkali liquor to flow. Then the alkali liquor passes through the filter cartridge 5, and the filter cartridge 5 filters out the precipitation particles with the diameter larger than 1mm in the alkali liquor. The filtered lye flows out from the lye outlet 12. The outlet pipe 14 can be used for sampling alkali liquor, and the valve 15 can control the flow of the outlet pipe 14.
About implementing the utility model discloses a beneficial technological effect does: the utility model discloses a cooperation between each component in the above embodiment, the impurity that reduces alkali lye when can realizing the Bayer process production aluminium hydroxide.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. Device for reducing alkali liquor impurities in aluminum hydroxide production by Bayer process, which is characterized by comprising a rotating motor (1), a sealing top cover (2), a spiral stirrer (3), a nut (4), a filter cartridge (5), studs (6), stud fixing parts (7), a first pressure flange (8), an alkali liquor inlet (9), a pipeline (10), a second pressure flange (11), an alkali liquor outlet (12), a dome cover (13), a drain pipe (14) and a valve (15), wherein the left side of the pipeline (10) is provided with the alkali liquor inlet (9), the right side of the pipeline (10) is provided with the alkali liquor outlet (12), one end of the pipeline (10) far away from the alkali liquor outlet (12) is fixed with four stud fixing parts (7) on the pipeline (10), and each stud fixing part (7) is fixed with one stud (6), keep away from in pipeline (10) one has been placed to the one end of alkali lye export (12) seal cap (2), seal cap (2) pass through double-screw bolt (6) with nut (4) cooperation is fixed, fixed mounting has one on seal cap (2) rotating electrical machines (1), spiral agitator (3) set up in pipeline (10), rotating electrical machines (1) with spiral agitator (3) are connected, pipeline (10) inside has placed one cartridge filter (5), pipeline (10) are kept away from the one end of alkali lye entry (9) is connected and is fixed with one dome lid (13), the geometric centre department of dome lid (13) is connected with one drain pipe (14), install one on drain pipe (14) valve (15), alkali lye entry (9) pass through first pressure flange (8) are connected with the alkali lye inflow pipeline of production aluminium hydroxide, the alkali liquor outlet (12) is connected with an alkali liquor outflow pipeline for producing aluminum hydroxide through the second pressure flange (11).
2. The apparatus for reducing impurities in alkaline liquor during the Bayer process for producing aluminum hydroxide according to claim 1, wherein the filter cylinders (5) are provided with uniformly distributed filter holes with the pore size of 1 mm.
3. The apparatus for reducing lye impurities in the Bayer Process for the production of aluminum hydroxide according to claim 1 wherein the material of the top sealing cap (2), the filter cartridges (5), the pipe (10) and the dome (13) is glass reinforced plastic.
4. The Bayer process aluminum hydroxide production apparatus for reducing lye impurities according to claim 1, wherein the connection of the seal cap (2) to the pipeline (10) is sealed by a circular sealing sheet.
5. The Bayer process aluminum hydroxide production apparatus reducing lye impurities as claimed in claim 1 wherein said helical agitator (3) is made of a nickel alloy.
6. The apparatus for reducing impurities in alkaline liquor during the Bayer process for producing aluminum hydroxide according to claim 1, wherein one end of the filter cylinder (5) is provided with an annular disc which is attached to the inner wall of the pipeline (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020497585.3U CN212374899U (en) | 2020-04-08 | 2020-04-08 | Device for reducing alkali liquor impurities in Bayer process production of aluminum hydroxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020497585.3U CN212374899U (en) | 2020-04-08 | 2020-04-08 | Device for reducing alkali liquor impurities in Bayer process production of aluminum hydroxide |
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| CN212374899U true CN212374899U (en) | 2021-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114515629A (en) * | 2022-02-18 | 2022-05-20 | 贵州广铝氧化铝有限公司 | Slurry stirring and grinding equipment for aluminum oxide production |
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2020
- 2020-04-08 CN CN202020497585.3U patent/CN212374899U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114515629A (en) * | 2022-02-18 | 2022-05-20 | 贵州广铝氧化铝有限公司 | Slurry stirring and grinding equipment for aluminum oxide production |
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