CN102976117B - Crystallized aluminum salt multilevel relay-type flexible helical blanking system and method - Google Patents
Crystallized aluminum salt multilevel relay-type flexible helical blanking system and method Download PDFInfo
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- CN102976117B CN102976117B CN201210528058.4A CN201210528058A CN102976117B CN 102976117 B CN102976117 B CN 102976117B CN 201210528058 A CN201210528058 A CN 201210528058A CN 102976117 B CN102976117 B CN 102976117B
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Abstract
The invention belongs to the production technical field of aluminum oxide production, and particularly discloses a crystallized aluminum salt multilevel relay-type flexible helical blanking system and a method. The crystallized aluminum salt multilevel relay-type flexible helical blanking system comprises multiple blanking systems which are gradually connected with one another level by level and a roasting system, wherein each blanking system consists of a crystallized aluminum salt stock cabin, a material stirrer, a rotary discharge valve and a flexible helical blanking device, by adopting the multilevel relay-mode blanking systems, the crystallized aluminum salt enters the roasting system after being adequately stirred and mixed through by multilevel blanking systems, a dust removal system is additionally arranged on an outlet of the roasting system, aluminum oxide in the recovery waste reenters the mixing process, so that the efficiency is increased; meanwhile, materials are prevented from being accumulated in the roasting system; and viscosity and caking of the material can be effectively reduced through the multilevel relay-mode blanking method.
Description
Technical field
The invention belongs to technical field of alumina production, be specifically related to a kind of blanking system about crystalline aluminium salt and method.
Background technology
The mass transport mode of China's alkaline process production aluminium oxide generally adopts the mode of gravity transfer or pressurized air injection, but it is high that acid system is produced the crystalline aluminium salt aqueous ingredients of aluminium oxide, there is following technical barrier in blanking process: 1. due to the easy deliquescence of crystalline aluminium salt, hygroscopic character is strong, material consecutive low temperature state, be prone to conglomeration, the appearance of slagging scorification phenomenon, the continuous drive ability of equipment is poor, causes the obstruction of material.2. the aggressive fume that crystalline aluminium salinity solution discharges is (as HCl, SO
3) easily condensation generation dew point corrosion, bringing serious etching problem to equipment, material requirements is higher.
Summary of the invention
The object of the invention is to for prior art shortcoming, a kind of crystalline aluminium salt multi-stage relay formula flexible screw blanking system and method are provided.
Realize technical scheme of the present invention as follows:
A kind of crystalline aluminium salt multi-stage relay formula flexible screw blanking system, it comprises the multiple blanking systems and the burning training system that connect step by step, described blanking system is made up of crystalline aluminium salt feed bin, material stirrer, rotary discharge valve and flexible screw blanking device; Described crystalline aluminium salt feed bin is symmetrical bucket shape structure, upper surface processing import, and its center is provided with material stirrer; Exit, the below connecting tube of described crystalline aluminium salt feed bin, pipeline is provided with rotary discharge valve, and the end of this pipeline connects flexible screw blanking device; Flexible screw blanking device in higher level's blanking system is connected with one of them import of crystalline aluminium salt feed bin in subordinate blanking system; One of two import of the crystalline aluminium salt feed bin in the blanking system of described the top connect Feed system, and another connects the outlet of dust pelletizing system; The entrance of described dust pelletizing system is connected with the outlet of burning training system; The end of the flexible screw blanking device of the blanking system of described below is connected with burning training system.
In above-mentioned a kind of crystalline aluminium salt multi-stage relay formula flexible screw blanking system: described blanking system is 2 ~ 5.
In above-mentioned a kind of crystalline aluminium salt multi-stage relay formula flexible screw blanking system: described material stirrer comprises an installation shaft, axle is provided with and stirs thorn, is arranged on the axis place of crystalline aluminium salt feed bin by installation shaft.
In above-mentioned a kind of crystalline aluminium salt multi-stage relay formula flexible screw blanking system: described flexible screw blanking device comprises that angle of inclination is tremie pipe, pipe link, the actuating device of 30 degree～60 degree and is located at the flexible screw in tremie pipe, the end of described tremie pipe is provided with discharging opening, upper end is provided with inlet point, described flexible screw stretches out discharging opening 10cm～20cm, described flexible screw is connected with pipe link, and pipe link is connected with actuating device.
A kind of crystalline aluminium salt multi-stage relay formula flexible screw baiting method, comprises the steps:
1) crystalline aluminium salt being made to water ratio is 5%～12%, and packs in the crystalline aluminium salt feed bin of the top blanking system and aluminium oxide blending;
2) entered after multistage blanking system stirs and make muddy, and carried out roasting through the crystalline aluminium salt of the blanking system output of below, sintering temperature is controlled between 450 DEG C to 1100 DEG C, makes crystalline aluminium salt change Al into
2o
3;
3) output finished product Al
2o
3;
4) by above-mentioned steps 2) in produce the high-temperature flue gas with aluminium oxide carry out dedusting recovery, the Al being recycled after dedusting
2o
3enter into the top first order blanking system, with the abundant blending of crystalline aluminium salt newly entering, repeat above-mentioned steps 2) and 3), until obtain enough finished product Al
2o
3.
The obtained beneficial effect of the present invention is as follows: the blanking system of the multi-stage relay pattern of the present invention's design, make crystalline aluminium salt through after multistage abundant Agitation and mixing, enter into the training system of burning, set up dust pelletizing system at burning training system outlet simultaneously, reclaiming the central aluminium oxide of waste material reenters in mixed process, efficiency is improved, prevent piling up of material simultaneously in burning training system; The blanking of multi-stage relay pattern can effectively reduce material viscosity, prevents conglomeration caking.
Further, flexible screw blanking device of the present invention is by the drive of actuating device, and the flexible screw that is arranged to certain angle can become the passive active into spiral thrust of crystalline aluminium salt Action of Gravity Field, prevents the accumulation of material.
Baiting method of the present invention, utilizes said system to form multistage blanking step, fully blending, the crystalline aluminium salt conglomeration caking of mode blanking process.
Brief description of the drawings
Fig. 1 is crystalline aluminium salt multi-stage relay formula flexible screw blanking system schematic diagram of the present invention;
Fig. 2 is the structural representation of flexible screw blanking device;
In figure: 1. one-level blanking system; 2. secondary blanking system; 3. roasting system; 4. dust pelletizing system; 5. crystalline aluminium salt feed bin; 6. material stirrer; 7. rotary discharge valve; 8. flexible screw blanking device; 9. actuating device; 10. connecting device; 11. inlet points; 12. flexible screws; 13. tremie pipes; 14. discharging openings.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, one-level blanking system 1 is made up of crystalline aluminium salt feed bin 5, material stirrer 6, rotary discharge valve 7 and flexible screw blanking device 8.Crystalline aluminium salt feed bin 5 is symmetrical bucket shape structure, and two imports of upper surface processing receive respectively from the finished product aluminium oxide after the crystalline aluminium salt of easy caking and cyclone system 4 processing of one-level blanking system top of Feed system.The shaft core position of described crystalline aluminium salt feed bin 5 is installed material stirrer 6, on the axle of this material stirrer 6, be processed with and stir thorn, guarantee mixes with the even of alumina particle from cyclone system 4 from the crystalline aluminium salt of the easy caking of Feed system, reduce the material viscosity of crystalline aluminium salt, the easy caking characteristics that overcomes crystalline aluminium salt, prevents solid accumulation putty.The bottom of crystalline aluminium salt feed bin 5 is fixedly connected with rotary discharge valve 7, and flexible screw blanking device 8 is installed in the below of rotary discharge valve 7.
As shown in Figure 2, described flexible screw blanking device 8 comprises that angle of inclination is the tremie pipe 13 of 45 degree, in described tremie pipe 13, is provided with flexible screw 12, and the end of described tremie pipe 13 is processed with discharging opening 14, and upper end is provided with inlet point 11.Described flexible screw 12 stretches out the discharging opening 14 of tremie pipe 13.Described flexible screw 12 is connected with pipe link 10, and pipe link 10 is connected with actuating device 9, and pipe link 10 is driven by this actuating device 9, drives flexible screw 12 in the interior rotation of tremie pipe 13 simultaneously.
Described flexible screw 12 is coiled and is formed for stainless steel bars.
The below of one-level blanking system 1 is that the structure of 2, two blanking systems of secondary blanking system is identical.End at the flexible screw blanking device 8 of secondary blanking system 2 connects roasting system 3, and described calciner is conventional calciner, comprises the device such as rotary kiln, fluid bed.
The top of described one-level blanking system 1 is dust pelletizing system 4, its import is by pipeline and roasting system 3, receive the high-temperature flue gas of carrying dust secretly that roasting system 3 is exported, the outlet of cyclone system 4 connects an import of crystalline aluminium salt feed bin 5 upper surfaces of above-mentioned one-level blanking system 1 by pipeline.
Above-mentioned blanking system 1 also can expand to 3,4 or 5.
Application said system, in the time that crystalline aluminium salt is six water crystallization aluminium chlorides or crystalline sulfuric acid aluminium, its flexible screw baiting method step is as follows:
1) crystalline aluminium salt being made to water ratio is 5%～12%, packs the crystalline aluminium salt feed bin 5 of above-mentioned one-level blanking system 1 into;
2) pack alumina material into dust pelletizing system, through entering the crystalline aluminium salt feed bin 5 of one-level blanking system 1 after dedusting, with the crystalline aluminium salt in step 1 in the 5 interior blending of crystalline aluminium salt feed bin;
3) enter into secondary blanking system 2 through mixed crystalline aluminium salt and carry out further fully blending.
4) the crystalline aluminium salt after 2 blending of secondary blanking system is carried out to roasting, sintering temperature is controlled between 450 DEG C to 1100 DEG C, can get 450 DEG C, 800 DEG C or 1100 DEG C, thereby makes crystalline aluminium salt change Al into
2o
3.
5) utilize above-mentioned roasting system in step 3), to produce Al
2o
3the high-temperature flue gas of carrying partial oxidation aluminium secretly producing in process carries out dedusting recovery, is again transported to the crystalline aluminium salt feed bin 5 of one-level blanking system 1, with the blending of crystalline aluminium salt.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.If these amendments and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (5)
1. a crystalline aluminium salt multi-stage relay formula flexible screw blanking system, it is characterized in that: it comprises several blanking systems and 1 the burning training system (3) that connect step by step, and described blanking system is made up of crystalline aluminium salt feed bin (5), material stirrer (6), rotary discharge valve (7) and flexible screw blanking device (8); Described crystalline aluminium salt feed bin (5) is symmetrical bucket shape structure, upper surface processing import, and its center is provided with material stirrer (6); Exit, the below connecting tube of described crystalline aluminium salt feed bin (5), pipeline is provided with rotary discharge valve (7), and the end of this pipeline connects flexible screw blanking device (8); Flexible screw blanking device (8) in higher level's blanking system is connected with one of them import of crystalline aluminium salt feed bin (5) in subordinate blanking system; One of two import of the crystalline aluminium salt feed bin (5) in the blanking system of the top connect Feed system, and another connects the outlet of dust pelletizing system; The entrance of described dust pelletizing system is connected with the outlet of burning training system (3); The end of the flexible screw blanking device (8) of the blanking system of below is connected with burning training system (3).
2. crystalline aluminium salt multi-stage relay formula flexible screw blanking system as claimed in claim 1, is characterized in that: described blanking system is 2～5.
3. crystalline aluminium salt multi-stage relay formula flexible screw blanking system as claimed in claim 1 or 2, it is characterized in that: described material stirrer (6) comprises an installation shaft, axle is provided with and stirs thorn, is arranged on the axis place of crystalline aluminium salt feed bin (5) by installation shaft.
4. crystalline aluminium salt multi-stage relay formula flexible screw blanking system as claimed in claim 1 or 2, it is characterized in that: described flexible screw blanking device (8) comprises that angle of inclination is the tremie pipe (13) of 30 degree～60 degree, pipe link (10), actuating device (9) and be located at the flexible screw (12) in tremie pipe (13), the end of described tremie pipe (13) is provided with discharging opening (14), upper end is provided with inlet point (11), described flexible screw (12) stretches out discharging opening (14) 10cm～20cm, described flexible screw (12) is connected with pipe link (10), pipe link (10) is connected with actuating device (9).
5. a crystalline aluminium salt multi-stage relay formula flexible screw baiting method, it is characterized in that, the method utilizes multi-stage relay formula flexible screw blanking system to carry out blanking operation, multi-stage relay formula flexible screw blanking system comprises several blanking systems and 1 the burning training system (3) that connect step by step, and described blanking system is made up of crystalline aluminium salt feed bin (5), material stirrer (6), rotary discharge valve (7) and flexible screw blanking device (8); Described crystalline aluminium salt feed bin (5) is symmetrical bucket shape structure, upper surface processing import, and its center is provided with material stirrer (6); Exit, the below connecting tube of described crystalline aluminium salt feed bin (5), pipeline is provided with rotary discharge valve (7), and the end of this pipeline connects flexible screw blanking device (8); Flexible screw blanking device (8) in higher level's blanking system is connected with one of them import of crystalline aluminium salt feed bin (5) in subordinate blanking system; One of two import of the crystalline aluminium salt feed bin (5) in the blanking system of the top connect Feed system, and another connects the outlet of dust pelletizing system; The entrance of described dust pelletizing system is connected with the outlet of burning training system (3); The end of the flexible screw blanking device (8) of the blanking system of below is connected with burning training system (3);
The method comprises the steps:
1) crystalline aluminium salt being made to water ratio is 5%～12%, and packs in the crystalline aluminium salt feed bin (5) of the top blanking system of multi-stage relay formula flexible screw blanking system and aluminium oxide blending;
2) entered after multistage blanking system stirs and make muddy, and carried out roasting through the crystalline aluminium salt of the blanking system output of the below of multi-stage relay formula flexible screw blanking system, sintering temperature is controlled between 450 DEG C to 1100 DEG C, makes crystalline aluminium salt change Al into
2o
3;
3) output finished product Al
2o
3;
4) by above-mentioned steps 2) in produce the high-temperature flue gas with aluminium oxide carry out dedusting recovery, the Al being recycled after dedusting
2o
3enter into the top first order blanking system, with the abundant blending of crystalline aluminium salt newly entering, repeat above-mentioned steps 2) and 3), until obtain enough finished product Al
2o
3.
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| CN201210528058.4A CN102976117B (en) | 2012-12-10 | 2012-12-10 | Crystallized aluminum salt multilevel relay-type flexible helical blanking system and method |
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| CN201210528058.4A CN102976117B (en) | 2012-12-10 | 2012-12-10 | Crystallized aluminum salt multilevel relay-type flexible helical blanking system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105775789B (en) * | 2016-03-14 | 2018-08-03 | 蔡惠文 | A kind of staged helical conveyer crushing plant |
| CN116240586B (en) * | 2023-04-04 | 2023-11-10 | 北京华索科技股份有限公司 | Aluminum oxide continuous blanking device and method for aluminum electrolysis cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005008282A (en) * | 2003-04-25 | 2005-01-13 | Nippon Seiki Co Ltd | Feeder of powder |
| JP2005327118A (en) * | 2004-05-14 | 2005-11-24 | Kyowa:Kk | Multivariable control optimization program and volumetric feeder |
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| US4065271A (en) * | 1973-09-15 | 1977-12-27 | Metallgesellschaft Aktiengesellschaft | Process of separating hydrogen fluoride from gases |
| US4671497A (en) * | 1984-02-15 | 1987-06-09 | Klockner-Humboldt-Deutz Aktiengesellschaft | Apparatus and method for the continuous calcination of aluminum hydroxide |
| US5348195A (en) * | 1991-10-28 | 1994-09-20 | Symac | Apparatus for extracting a substance stored in the divided state in a silo |
| CN1464826A (en) * | 2001-07-03 | 2003-12-31 | 株式会社日本触媒 | Continuous manufacturing method for hygroscopic resin powder and powder level detector used therefor |
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