CN106629798A - Novel two-stage-decomposition intensive system and process for producing sandy aluminum oxide - Google Patents
Novel two-stage-decomposition intensive system and process for producing sandy aluminum oxide Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
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- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
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Abstract
The invention belongs to the technical field of the production of aluminum oxide, and particularly relates to a novel two-stage-decomposition intensive system and a novel two-stage-decomposition intensive process for producing sandy aluminum oxide. The novel two-stage-decomposition intensive system for producing the sandy aluminum oxide, which is provided by the invention, comprises agglomeration tanks and growing tanks, wherein a fine crystal seed filtering machine and a fine crystal seed filtering machine gas-liquid separator are arranged above an agglomeration tank 1# and an agglomeration tank 2#; a coarse seed crystal filtering machine and a coarse crystal seed filtering machine gas-liquid separator are arranged above a growing tank 1# and a growing tank 2#; a classifying cyclone set is arranged above structural frameworks of the fine crystal seed filtering machine and the coarse crystal seed filtering machine. By using the novel two-stage-decomposition intensive system, the floor area is saved; the investment of the construction cost of a factory building is decreased; further, the short-distance natural flow is realized by utilizing a potential difference; thus, a procedure is simplified; a conveying distance is shortened; the investment and running costs of a device and the workload of manually cleaning a scab are effectively decreased.
Description
Technical field
The invention belongs to technical field of alumina production, and in particular to a kind of new producing sand-shaped alumina by two-section decomposition
Intensification system and technique.
Background technology
It is one of main technological route of current sandy alumina production that two sections are decomposed.Domestic and international two sections points of alumina producer
The traditional handicraft configuration mode of solution is decomposing tank series, and thick, fine grain kind filters factory building and cyclone classification factory building and need to individually build.This
Planting the weak point of configuration mode is：（1）Floor space is larger, needs individually to build thick, fine grain kind filtration factory building and eddy flow point
Level factory building, total figure needs special position to be planned；（2）Flow process is cumbersome, thick, fine grain kind filter need it is special it is thick,
Grown up and agglomeration head grooves with being pumped into after fine grain kind channelization slurry, accordingly increase thick, thin seed mixer, thick, fine grain kind pump, thick, fine grain
Plant filter overflow launder and thick, fine grain kind filter flood pump；（3）Classification factory building need to configure corresponding Grading Overflow groove and classification
Underflow groove, recycles Grading Overflow pump and classification underflow pump that material is got into plant downstream, and long flow path, operation are more, plugging risk
Increase, the workload that field worker operation and cleaning are safeguarded increases；（4）Cost of investment increases, the hardware such as mill construction and equipment
Cost increases；（5）Operating cost increases, and need to increase coarse seed groove, thin seed mixer, coarse seed pump, fine grain kind pump, coarse seed and filter
Machine, fine grain kind filter overflow launder, coarse seed filter flood pump, fine grain kind filter flood pump, Grading Overflow groove, classification are overflow
The consumption of stream pump, classification underflow groove, the electric load of classification underflow pump and correspondence standby redundancy.
The content of the invention
For the deficiencies in the prior art, the present invention provides a kind of intensive system of new producing sand-shaped alumina by two-section decomposition
System and technique, it is therefore an objective to according to flow process rule, optimize and combine the configuration relation between each split workshop, make full use of closely certainly
Stream conveying, reaches and saves intermediate link, simple flow, saves and take up an area and equipment investment, reduction labor strength and operation dimension
The results of industrial application of shield cost.
The intensification system of the new producing sand-shaped alumina by two-section decomposition of the present invention, including agglomeration groove and long vat, carefully
Crystal seed filter and fine grain kind filter gas-liquid separator be configured in 1# agglomeration groove and 2# agglomeration groove top, coarse seed filter and
Coarse seed filter gas-liquid separator is configured in the long vats of 1# and the long vat tops of 2#, and classifying cyclone group is configured in fine grain kind mistake
The structural framing top of filter and coarse seed filter；
Wherein, 1# agglomeration groove charging aperture is connected with the hot seminal fluid pipe of seminal fluid heat exchange short circuit；
The discharge zone of described fine grain kind filter and back-blowing system connectivity, chute blanking to rush dilute mouth cold with seminal fluid heat exchange
Seminal fluid discharging opening is connected, and the end of chute feed opening connects with 1# agglomeration groove and 2# agglomeration grooves, overfall and the last groove of section of growing up
Charging aperture is connected；One of dispensing head of fine grain kind filter is connected with the mother liquor tank charging aperture of plant downstream, another point
Connect with fine grain kind filter gas-liquid separator with head, fine grain kind filter gas-liquid separator top bleeding point connects with vacuum system
Logical, lower section is provided with liquid outlet, and liquid outlet is connected with the mother liquor tank charging aperture of plant downstream；
The discharge zone of described coarse seed filter and back-blowing system connectivity, chute blanking to rush dilute mouth cold with seminal fluid heat exchange
Seminal fluid discharging opening is connected, and the end of chute feed opening connects with the long vats of 1# and the long vats of 2#, overfall and the last groove of section of growing up
Charging aperture is connected；One of dispensing head of coarse seed filter is connected with the mother liquor tank charging aperture of plant downstream, another point
Connect with coarse seed filter gas-liquid separator with head, coarse seed filter gas-liquid separator top bleeding point connects with vacuum system
Logical, lower section is provided with liquid outlet, and liquid outlet is connected with the mother liquor tank charging aperture of plant downstream；The charging aperture of coarse seed filter with it is thick
The discharging opening connection of crystal seed filter feed pump, the charging aperture of coarse seed filter feed pump connects with the discharging opening of section end groove of growing up
It is logical；
The overfall of described classifying cyclone group is connected with the charging aperture of fine grain kind filter, and underflow opening is flat with plant downstream
Disk filter charging aperture is connected；The charging aperture of classifying cyclone group feed pump is connected with the discharging opening of section of growing up groove second from the bottom.
Wherein, when 1# agglomeration grooves, section of growing up end groove and section of growing up groove second from the bottom carry out cleaning maintenance, 2# is enabled respectively
Agglomeration groove, section of growing up groove second from the bottom and section of growing up groove third from the bottom are connected accordingly.
The technique of sandy alumina is produced using the intensification system of above-mentioned new producing sand-shaped alumina by two-section decomposition, is pressed
Carry out according to following steps：
（1）Filtered to the suction of fine grain kind filter and blowback, be passed through the cold seminal fluid in part and rush the filter unloaded in dilute filter process
Cake, after cold seminal fluid mixes with filter cake, together with a part of short-circuit hot seminal fluid, into 1# agglomeration grooves, when the cleaning of 1# agglomeration groove is overhauled
When use 2# agglomeration grooves, enter the long vats of 1# by decomposing chute after the completion of agglomeration, when the cleaning maintenance of 1# long vats, 2# length
Vat is used as section head grooves of growing up；
Simultaneously by being filtered to the suction of coarse seed filter and blowback, it is passed through the cold seminal fluid in part and rushes and unload in dilute filter process
Filter cake, after cold seminal fluid mixes with filter cake, into the long vats of 1#, when the long vat cleaning maintenance of 1#, the long vats of 2# are used as growing up
The first groove of section；
（2）Mixed slurry in the long vats of 1# coordinates intermediate temperature drop system to be decomposed through long vats at different levels, after the completion of decomposition
Part Jing grows up the discharging of section groove second from the bottom, when section of growing up groove cleaning maintenance second from the bottom from section inverse three grooves discharging of growing up,
The feed pump discharging of discharging Jing classifying cyclone groups enters classifying cyclone group；Remainder is by section end groove discharging Jing coarse seeds of growing up
Filter feed pump enters coarse seed filter, when section end groove cleaning of growing up is overhauled from section of growing up groove discharging second from the bottom；
The overflow of classifying cyclone group is flow automatically into fine grain kind filter, and underflow enters the horizontal table filter that neighbouring finished product is filtered；
Fine grain kind filter, fine grain kind filter gas-liquid separator and coarse seed filter, the filtrate of coarse seed gas-liquid separator
Into the mother liquor tank of plant downstream；
Slightly, the overflow of fine grain kind filter enters section end groove of growing up, and during the groove cleaning maintenance of section of growing up end section inverse the of growing up is entered
Two grooves.
In above-mentioned technique, 100 ~ 150g/l of solids content in agglomeration section 1# agglomeration groove, temperature is 75 ~ 82 DEG C, agglomeration section point
The solution time is 4 ~ 6 hours.
In above-mentioned technique, 380 ~ 480g/l of solids content in the long vats of section 1# of growing up, temperature is 65 ~ 72 DEG C, section of growing up point
The solution time is 27 ~ 32 hours.
In above-mentioned technique, decompose solids content in the slurries for completing in the groove of section of growing up end and be about 450 ~ 550g/L, temperature is
46 ~ 54 DEG C, the content of aluminum oxide is 70 ~ 120g/L wherein in liquid phase, and the content of sodium oxide molybdena is 120 ~ 170g/L.
In above-mentioned technique, from seminal fluid heat exchange, cold seminal fluid exchanges heat seminal fluid from plate type heat exchanger, hot seminal fluid for short circuit not
The seminal fluid of Jing heat exchange, each section of seminal fluid proportion relation is that it is 15 ~ 20% that hot seminal fluid enters the percentage by weight of agglomeration section 1# agglomeration groove, cold
Seminal fluid rush dilute fine grain kind filter cake percentage by weight be 32 ~ 42%, cold seminal fluid rush coarse seed filter cake percentage by weight be 38 ~
48%。
In above-mentioned technique, the overflow solids content of classifying cyclone group is 250 ~ 350g/l, and the solids content of underflow is 700
~900g/L。
Compared with prior art, of the invention the characteristics of and beneficial effect are：
Fine grain kind filter places 1# agglomeration grooves in the intensification system of the new producing sand-shaped alumina by two-section decomposition of the present invention
On 2# agglomeration grooves, coarse seed filter is placed on the long vats of 1# and the long vats of 2#, thick, the fine grain kind filter cake Jing after filtration
Seminal fluid rush it is dilute after be directly entered agglomeration and long vat, filter system is supported using steel frame, using filter blanking funnel reality
The switching of existing 1#, 2# feed well.Classifying cyclone group be configured in slightly, fine grain kind filter framework on, underflow is used as finished product gravity-flow
Enter the horizontal table filter of finished product filtration plant nearby, overflow gravity flow enters fine grain kind filter.
Compared with thick, fine grain kind filters the legacy configuration mode for individually building factory building, the present invention saves floor space, reduces
Factory building builds the input taken, and realizes that short distance is flow automatically using potential difference, so as to simple flow, reduces fed distance, effectively subtracts
Equipment investment and operating cost, and the workload that labor cleaning scabs are lacked.
Description of the drawings
Fig. 1 is the intensification system schematic diagram of the new producing sand-shaped alumina by two-section decomposition of the present invention；
Wherein：1：1# agglomeration grooves；2：2# agglomeration grooves；3：The long vats of 1#；4：The long vats of 2#；5：Section of growing up groove third from the bottom； 6：It is long
Big section groove second from the bottom；7：Section of growing up end groove；8：Classifying cyclone group；9：Fine grain kind filter；10：Fine grain kind filter gas-liquid
Separator；11：Coarse seed filter；12；Coarse seed filter gas-liquid separator； 13：Classifying cyclone group feed pump；14；Slightly
Crystal seed filter feed pump.
Specific embodiment
Model GLL-180 of the coarse seed vertical-disk filter adopted in the embodiment of the present invention；
Model GLL-120 of the fine grain kind vertical-disk filter adopted in the embodiment of the present invention；
Model ZVN/D12 of the classifying cyclone adopted in the embodiment of the present invention；
The agglomeration groove size adopted in the embodiment of the present invention is for ￠ 14x36.5m；
The long vat size adopted in the embodiment of the present invention is for ￠ 14x（35.5~30.4）m.
Technical scheme is described further with reference to specific embodiment.
The intensification system of the new producing sand-shaped alumina by two-section decomposition of the present embodiment is as shown in figure 1, including agglomeration groove
With long vat, fine grain kind filter 9 and fine grain kind filter gas-liquid separator 10 are configured on 1# agglomeration groove 1 and 2# agglomeration groove 2
Side, coarse seed filter 11 and coarse seed filter gas-liquid separator 12 are configured in the long vats 3 of 1# and the long tops of vat 4 of 2#, point
Level cyclone group 8 is configured in the structural framing top of fine grain kind filter 9 and coarse seed filter 11；
Wherein, the charging aperture of 1# agglomeration groove 1 is connected with the hot seminal fluid pipe of seminal fluid heat exchange short circuit；
Dilute mouth and seminal fluid heat exchange are rushed in the discharge zone of described fine grain kind filter 9 and back-blowing system connectivity, chute blanking
Cold seminal fluid discharging opening connection, the end of chute feed opening connects with 1# agglomeration groove 1 and 2# agglomeration groove 2, and overfall and section of growing up are last
The charging aperture connection of groove 7；One of dispensing head of fine grain kind filter 9 is connected with the mother liquor tank charging aperture of plant downstream, separately
One dispensing head is connected with fine grain kind filter gas-liquid separator 10, the top bleeding point of fine grain kind filter gas-liquid separator 10 with
Vacuum system is connected, and lower section is provided with liquid outlet, and liquid outlet is connected with the mother liquor tank charging aperture of plant downstream；
Dilute mouth and seminal fluid heat exchange are rushed in the discharge zone of described coarse seed filter 11 and back-blowing system connectivity, chute blanking
Cold seminal fluid discharging opening connection, the end of chute feed opening connects with the long vats 3 of 1# and the long vats 4 of 2#, and overfall and section of growing up are last
The charging aperture connection of groove 7；One of dispensing head of coarse seed filter 11 is connected with the mother liquor tank charging aperture of plant downstream, separately
One dispensing head is connected with coarse seed filter gas-liquid separator 12, the top bleeding point of coarse seed filter gas-liquid separator 12 with
Vacuum system is connected, and lower section is provided with liquid outlet, and liquid outlet is connected with the mother liquor tank charging aperture of plant downstream；Coarse seed filter 11
Charging aperture connect with the discharging opening of coarse seed filter feed pump 14, the charging aperture of coarse seed filter feed pump 14 with grow up
The discharging opening connection of the last groove 7 of section；
The overfall of described classifying cyclone group 8 is connected with the charging aperture of fine grain kind filter, underflow opening and plant downstream
Horizontal table filter charging aperture is connected；The discharging opening of the charging aperture of classifying cyclone group feed pump 13 and section of growing up groove 6 second from the bottom
Connection.
Wherein, when 1# agglomeration groove 1, section of growing up end groove 7 and section of growing up groove 6 second from the bottom carry out cleaning maintenance, open respectively
Connected accordingly with 2# agglomeration groove 2, section of growing up groove 6 second from the bottom and section of growing up groove 5 third from the bottom.
The technique of sandy alumina is produced using the intensification system of above-mentioned new producing sand-shaped alumina by two-section decomposition, is pressed
Carry out according to following steps：
（1）Filtered to the suction of fine grain kind filter 9 and blowback, be passed through the cold seminal fluid in part and rush the filter unloaded in dilute filter process
Cake, after cold seminal fluid mixes with filter cake, together with a part of short-circuit hot seminal fluid, into 1# agglomeration groove 1, when the cleaning of 1# agglomeration groove 1 is examined
2# agglomeration groove 2 is used when repairing, the long vats 3 of 1# are entered by decomposing chute after the completion of agglomeration, when the long cleaning of vat 3 maintenance of 1#,
The long vats 4 of 2# are used as section head grooves of growing up；
Simultaneously by being filtered to the suction of coarse seed filter 11 and blowback, it is passed through the cold seminal fluid in part and rushes and unload in dilute filter process
Under filter cake, after cold seminal fluid mixes with filter cake, into the long vats 3 of 1#, when the long cleaning of vat 3 maintenance of 1#, the long vats 4 of 2# are made
For section head grooves of growing up；
（2）Mixed slurry in the long vats 3 of 1# coordinates intermediate temperature drop system to be decomposed through long vats at different levels, after the completion of decomposition
Jing section grooves 6 second from the bottom of growing up in part discharge, and go out from section three grooves 5 of inverse of growing up when section of the growing up cleaning of groove 6 maintenance second from the bottom
Material, discharging Jing classifying cyclone groups feed pump 13 discharges and enters classifying cyclone group 8；Remainder is discharged by section end groove 7 of growing up
Jing coarse seed filters feed pump 14 enters coarse seed filter 11, reciprocal from section of growing up when the section end cleaning of groove 7 of growing up is overhauled
Second groove 6；
The overflow of classifying cyclone group 8 is flow automatically into fine grain kind filter 9, and underflow enters the horizontal table filter that neighbouring finished product is filtered；
Fine grain kind filter 9, fine grain kind filter gas-liquid separator 10 and coarse seed filter 11, coarse seed gas-liquid separator 12
Filtrate enter plant downstream mother liquor tank；
Slightly, the overflow of fine grain kind filter enters section end groove 7 of growing up, and enters section of growing up during the cleaning maintenance of groove 7 of section of growing up end reciprocal
Second groove 6.
Embodiment 1
Solids content 150g/l in agglomeration section 1# agglomeration groove 1 in the present embodiment, temperature is 79 DEG C, and the agglomeration section resolving time is 6 little
When；
Solids content 400g/l in the long vats 3 of section 1# that grows up, temperature is 69 DEG C, grows up section resolving time for 30 hours；
It is 475g/L to decompose solids content in the slurries for completing in the groove 7 of section of growing up end, and temperature is 51 DEG C, aluminum oxide in its liquid phase
Content is 110g/L, and the content of sodium oxide molybdena is 160g/L；
Each section of seminal fluid proportion relation is that hot seminal fluid enters agglomeration section 1# agglomeration groove（2# agglomeration grooves are used during cleaning maintenance）Weight hundred
Divide than being 20%, it is 38% that cold seminal fluid rushes the percentage by weight of dilute fine grain kind filter cake, and cold seminal fluid rushes the weight percent of coarse seed filter cake
Than for 42%；
The overflow solids content of classifying cyclone group is 300g/l, and the solids content of underflow is 600g/L.
Embodiment 2
In the present embodiment the intensification system of new producing sand-shaped alumina by two-section decomposition include 1# agglomeration groove 1,2# agglomeration groove 2,
16 of the long vat 4 of the long vats 3,2# of 1#, section of growing up groove 5 third from the bottom, section of growing up groove 6 second from the bottom and section end groove 7 etc. of growing up
Decomposer is connected in series composition；
Solids content 150g/l in agglomeration section 1# agglomeration groove 1, temperature is 79 DEG C, and the agglomeration section resolving time is 6 hours；
Solids content 400g/l in the long vats 3 of section 1# that grows up, temperature is 69 DEG C, grows up section resolving time for 29 hours；
It is 470g/L to decompose solids content in the slurries for completing in the groove 7 of section of growing up end, and temperature is 52 DEG C, aluminum oxide in its liquid phase
Content is 110g/L, and the content of sodium oxide molybdena is 160g/L；
Each section of seminal fluid proportion relation is that hot seminal fluid enters agglomeration section 1# agglomeration groove（2# agglomeration grooves are used during cleaning maintenance）Weight hundred
Divide than being 20%, it is 38% that cold seminal fluid rushes the percentage by weight of dilute fine grain kind filter cake, and cold seminal fluid rushes the weight percent of coarse seed filter cake
Than for 42%；
The overflow solids content of classifying cyclone group 8 is 303g/l, and the solids content of underflow is 693g/L.
Embodiment 3
In the present embodiment the intensification system of new producing sand-shaped alumina by two-section decomposition include 1# agglomeration groove 1,2# agglomeration groove 2,
14 of the long vat 4 of the long vats 3,2# of 1#, section of growing up groove 5 third from the bottom, section of growing up groove 6 second from the bottom and section end groove 7 etc. of growing up
Decomposer is connected in series composition；
Solids content 150g/l in agglomeration section 1# agglomeration groove 1, temperature is 79 DEG C, and the agglomeration section resolving time is 4 hours；
Solids content 400g/l in the long vats 3 of section 1# that grows up, temperature is 69 DEG C, grows up section resolving time for 29 hours；
It is 465g/L to decompose solids content in the slurries for completing in the groove 7 of section of growing up end, and temperature is 53 DEG C, aluminum oxide in its liquid phase
Content is 110g/L, and the content of sodium oxide molybdena is 160g/L；
Each section of seminal fluid proportion relation is that hot seminal fluid enters agglomeration section 1# agglomeration groove（2# agglomeration grooves are used during cleaning maintenance）Weight hundred
Divide than being 20%, it is 38% that cold seminal fluid rushes the percentage by weight of dilute fine grain kind filter cake, and cold seminal fluid rushes the weight percent of coarse seed filter cake
Than for 42%；
The overflow solids content of classifying cyclone group 8 is 305g/l, and the solids content of underflow is 698g/L.
Claims (8)
1. a kind of intensification system of new producing sand-shaped alumina by two-section decomposition, including agglomeration groove and long vat, its feature exists
1# agglomeration groove and 2# agglomeration groove top are configured in fine grain kind filter and fine grain kind filter gas-liquid separator, coarse seed is filtered
Machine and coarse seed filter gas-liquid separator are configured in the long vats of 1# and the long vat tops of 2#, and classifying cyclone group is configured in fine grain
Plant the structural framing top of filter and coarse seed filter；
Wherein, 1# agglomeration groove charging aperture is connected with the hot seminal fluid pipe of seminal fluid heat exchange short circuit；
The discharge zone of described fine grain kind filter and back-blowing system connectivity, chute blanking to rush dilute mouth cold with seminal fluid heat exchange
Seminal fluid discharging opening is connected, and the end of chute feed opening connects with 1# agglomeration groove and 2# agglomeration grooves, overfall and the last groove of section of growing up
Charging aperture is connected；One of dispensing head of fine grain kind filter is connected with the mother liquor tank charging aperture of plant downstream, another point
Connect with fine grain kind filter gas-liquid separator with head, fine grain kind filter gas-liquid separator top bleeding point connects with vacuum system
Logical, lower section is provided with liquid outlet, and liquid outlet is connected with the mother liquor tank charging aperture of plant downstream；
The discharge zone of described coarse seed filter and back-blowing system connectivity, chute blanking to rush dilute mouth cold with seminal fluid heat exchange
Seminal fluid discharging opening is connected, and the end of chute feed opening connects with the long vats of 1# and the long vats of 2#, overfall and the last groove of section of growing up
Charging aperture is connected；One of dispensing head of coarse seed filter is connected with the mother liquor tank charging aperture of plant downstream, another point
Connect with coarse seed filter gas-liquid separator with head, coarse seed filter gas-liquid separator top bleeding point connects with vacuum system
Logical, lower section is provided with liquid outlet, and liquid outlet is connected with the mother liquor tank charging aperture of plant downstream；The charging aperture of coarse seed filter with it is thick
The discharging opening connection of crystal seed filter feed pump, the charging aperture of coarse seed filter feed pump connects with the discharging opening of section end groove of growing up
It is logical；
The overfall of described classifying cyclone group is connected with the charging aperture of fine grain kind filter, and underflow opening is flat with plant downstream
Disk filter charging aperture is connected；The charging aperture of classifying cyclone group feed pump is connected with the discharging opening of section of growing up groove second from the bottom.
2. a kind of intensification system of new producing sand-shaped alumina by two-section decomposition according to claim 1, its feature exists
In when 1# agglomeration grooves, section of growing up end groove and section of growing up groove second from the bottom carry out cleaning maintenance, 2# agglomeration grooves are enabled respectively, is grown up
Section groove second from the bottom and section groove third from the bottom of growing up are connected accordingly.
3. the technique of sandy alumina is produced using the intensification system of above-mentioned new producing sand-shaped alumina by two-section decomposition, it is special
Levy is to follow the steps below：
（1）Filtered to the suction of fine grain kind filter and blowback, be passed through the cold seminal fluid in part and rush the filter unloaded in dilute filter process
Cake, after cold seminal fluid mixes with filter cake, together with a part of short-circuit hot seminal fluid, into 1# agglomeration grooves, when the cleaning of 1# agglomeration groove is overhauled
When use 2# agglomeration grooves, enter the long vats of 1# by decomposing chute after the completion of agglomeration, when the cleaning maintenance of 1# long vats, 2# length
Vat is used as section head grooves of growing up；
Simultaneously by being filtered to the suction of coarse seed filter and blowback, it is passed through the cold seminal fluid of remainder and rushes in dilute filter process
The filter cake for unloading, after cold seminal fluid mixes with filter cake, into the long vats of 1#, when the long vat cleaning maintenance of 1#, the long vat conducts of 2#
Section of growing up head grooves；
（2）Mixed slurry in the long vats of 1# coordinates intermediate temperature drop system to be decomposed through long vats at different levels, after the completion of decomposition
Part Jing grows up the discharging of section groove second from the bottom, when section of growing up groove cleaning maintenance second from the bottom from section inverse three grooves discharging of growing up,
The feed pump discharging of discharging Jing classifying cyclone groups enters classifying cyclone group；Remainder is by section end groove discharging Jing coarse seeds of growing up
Filter feed pump enters coarse seed filter, when section end groove cleaning of growing up is overhauled from section of growing up groove discharging second from the bottom；
The overflow of classifying cyclone group is flow automatically into fine grain kind filter, and underflow enters the horizontal table filter that neighbouring finished product is filtered；
Fine grain kind filter, fine grain kind filter gas-liquid separator and coarse seed filter, the filtrate of coarse seed gas-liquid separator
Into the mother liquor tank of plant downstream；
Slightly, the overflow of fine grain kind filter enters section end groove of growing up, and during the groove cleaning maintenance of section of growing up end section inverse the of growing up is entered
Two grooves.
4. the intensive technique of new producing sand-shaped alumina by two-section decomposition according to claim 3, it is characterised in that institute
100 ~ 150g/l of solids content in the agglomeration section 1# agglomeration groove stated, temperature is 75 ~ 82 DEG C, and the agglomeration section resolving time is 4 ~ 6 hours.
5. the intensive technique of new producing sand-shaped alumina by two-section decomposition according to claim 3, it is characterised in that institute
380 ~ 480g/l of solids content in the long vats of section 1# of growing up stated, temperature is 65 ~ 72 DEG C, and it is little for 27 ~ 32 to grow up section resolving time
When.
6. the intensive technique of new producing sand-shaped alumina by two-section decomposition according to claim 3, it is characterised in that institute
Decompose solids content in the slurries for completing in the section end groove of growing up stated and be about 450 ~ 550g/L, temperature is 46 ~ 54 DEG C, wherein liquid phase
The content of middle aluminum oxide is 70 ~ 120g/L, and the content of sodium oxide molybdena is 120 ~ 170g/L.
7. the intensive technique of new producing sand-shaped alumina by two-section decomposition according to claim 3, it is characterised in that institute
The seminal fluid stated exchanges heat from seminal fluid heat exchange, cold seminal fluid from plate type heat exchanger, and hot seminal fluid is seminal fluid of the short circuit without heat exchange, respectively
Section seminal fluid proportion relation is that it is 15 ~ 20% that hot seminal fluid enters the percentage by weight of agglomeration section 1# agglomeration groove, and cold seminal fluid rushes dilute fine grain kind
The percentage by weight of filter cake is 32 ~ 42%, and it is 38 ~ 48% that cold seminal fluid rushes the percentage by weight of coarse seed filter cake.
8. the intensive technique of new producing sand-shaped alumina by two-section decomposition according to claim 3, it is characterised in that institute
The overflow solids content of the classifying cyclone group stated is 250 ~ 350g/l, and the solids content of underflow is 700 ~ 900g/L.
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| CN1760130A (en) * | 2005-10-20 | 2006-04-19 | 贵阳铝镁设计研究院 | Method for producing sandy alumina through decomposing seeds in low concentration |
| CN1962448A (en) * | 2006-11-23 | 2007-05-16 | 沈阳铝镁设计研究院 | Two-stage decomposition for producing sand-like alumina product and seed classification process |
| CN102515226A (en) * | 2011-12-22 | 2012-06-27 | 东北大学设计研究院（有限公司） | Decomposition and filtration method during alumina production process |
| CN103130253A (en) * | 2011-11-25 | 2013-06-05 | 贵阳铝镁设计研究院有限公司 | Two stage decomposition process method of Bayer process alumina production |
| CN105399122A (en) * | 2015-12-18 | 2016-03-16 | 东北大学设计研究院（有限公司） | First-tank temperature controlling and discharging grading method for producing sandy aluminium oxide through two-segment decomposition |
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- 2016-12-29 CN CN201611248446.1A patent/CN106629798B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760130A (en) * | 2005-10-20 | 2006-04-19 | 贵阳铝镁设计研究院 | Method for producing sandy alumina through decomposing seeds in low concentration |
| CN1962448A (en) * | 2006-11-23 | 2007-05-16 | 沈阳铝镁设计研究院 | Two-stage decomposition for producing sand-like alumina product and seed classification process |
| CN103130253A (en) * | 2011-11-25 | 2013-06-05 | 贵阳铝镁设计研究院有限公司 | Two stage decomposition process method of Bayer process alumina production |
| CN102515226A (en) * | 2011-12-22 | 2012-06-27 | 东北大学设计研究院（有限公司） | Decomposition and filtration method during alumina production process |
| CN105399122A (en) * | 2015-12-18 | 2016-03-16 | 东北大学设计研究院（有限公司） | First-tank temperature controlling and discharging grading method for producing sandy aluminium oxide through two-segment decomposition |
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