CN101597068B - Method for enriching borax pentahydrate from low-grade sediments in salt lakes - Google Patents
Method for enriching borax pentahydrate from low-grade sediments in salt lakes Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000013049 sediment Substances 0.000 title claims abstract description 10
- RSCACTKJFSTWPV-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane;pentahydrate Chemical compound O.O.O.O.O.[Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 RSCACTKJFSTWPV-UHFFFAOYSA-N 0.000 title claims abstract description 7
- 150000003839 salts Chemical class 0.000 title abstract 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims abstract description 61
- 229910021538 borax Inorganic materials 0.000 claims abstract description 60
- 239000004328 sodium tetraborate Substances 0.000 claims abstract description 60
- 159000000000 sodium salts Chemical class 0.000 claims abstract description 18
- 238000001953 recrystallisation Methods 0.000 claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 230000018044 dehydration Effects 0.000 claims abstract description 9
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 239000012452 mother liquor Substances 0.000 claims description 34
- 239000000243 solution Substances 0.000 claims description 26
- 238000005406 washing Methods 0.000 claims description 25
- 239000012065 filter cake Substances 0.000 claims description 20
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 17
- 239000001103 potassium chloride Substances 0.000 claims description 17
- 235000011164 potassium chloride Nutrition 0.000 claims description 17
- 239000006210 lotion Substances 0.000 claims description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 13
- 235000010755 mineral Nutrition 0.000 claims description 13
- 239000011707 mineral Substances 0.000 claims description 13
- 239000000047 product Substances 0.000 claims description 13
- 230000032258 transport Effects 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 11
- 239000010802 sludge Substances 0.000 claims description 11
- 230000029087 digestion Effects 0.000 claims description 10
- 239000012634 fragment Substances 0.000 claims description 10
- 239000010413 mother solution Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 239000000706 filtrate Substances 0.000 claims description 8
- 229920002472 Starch Polymers 0.000 claims description 7
- 235000019698 starch Nutrition 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 238000005119 centrifugation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052796 boron Inorganic materials 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 5
- 238000004090 dissolution Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 abstract 1
- 230000008676 import Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 230000001627 detrimental effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
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- 230000003245 working effect Effects 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for enriching borax pentahydrate from low-grade sediments in salt lakes in the Qinghai-Tibet Plateau. The method is carried out according to the following process steps: exploitation and transportation of crude ore from a salt lake, elimination of potassium salt and sodium salt from the crude ore, high-temperature dissolution, slag-slurry separation, solution decoloring, cooling down for recrystallization, dehydration, drying and metering and packaging to obtain a finished product. The preparation method has simple preparation process and low cost and can be directly implemented in a resource producing area; moreover, the method ensures stable product quality and above 80 percent of borax yield, thereby realizing reasonable and maximum enrichment of nonrenewable resources; in addition, the product can be used in different industries, which solves the problem that China only has limited boron resource.
Description
Technical field
The present invention relates to the preparation method of BORAX PENTAHYDRATE-99.9 MIN.Particularly, present method relate to a kind of from the Qinghai-Tibet Platean low-grade salt lake sediment (B wherein
2O
3Content≤15%) method of enriching borax pentahydrate in.Belong to physics chemical technique technical field.
Background technology
Since the establishment of the nation, the boron industry of China is the major production base with the Liao Dynasty's (rather) lucky (woods) always.Because resource is non-renewable, causes the resource in the above-mentioned resource place of production to face exhaustion.At present, the borax market 70% of China is the borax of the import Turkey and the U.S..Yet the Qinghai-Tibet Platean has salt lake more than 500, wherein in low-grade native borax (the raw ore chemical ingredients sees the following form) reserves have several ten million tons, thereby low-grade borax mineral in the development and use, imperative.Mainly show:
1, under the prerequisite that meets national mineral exploration and exploitation policy, by utilize resources synthetically, no longer need to adopt richness abandon poor, thereby with non-renewable Resource Rationalization, enrichment utilization in addition substantially.
2, constant product quality can reach and surpass the quality standard of import borax, thereby reduces or need not and solved the problem of the long-term dependence on import boraxs of industry such as China's enamel, high borosilicate glass, high-purity boron fertilizer from external import borax.
3, the exploitation of industry can be the place and increases the state tax revenue, and drive resource location peasants and herdsmen transportation, labor service increase income.
4, the mine tailing after the enrichment, body refuse covering sand can be used for planting artificially sown pastures, thereby play the change ecotope, reduce the effect of Greenhouse effect.
5, huge resource reserve is a popular feelings project of benefiting the nation and the people, benefiting future generations with hundreds of years of sustainable exploitation.
Summary of the invention
The object of the present invention is to provide a kind of from the low-grade salt lake sediment in Qinghai-Tibet Platean the method for enriching borax pentahydrate.This method has made full use of the dissolubility difference of borax under differing temps, and under different Tcs, bake out temperature the different principle of products therefrom, its preparation technology is simple, cost is low, can directly implement in the resource location, and the product that makes can use for a plurality of industries, thereby reduces or stopped from external import BORAX PENTAHYDRATE-99.9 MIN.
For achieving the above object, the present invention is undertaken by following processing step:
The salt lake raw ore fells and transports → raw ore remove sylvite, sodium salt → high-temperature digestion → slag slurry separation → solution decolouring → cooling recrystallization → dewater → dry → measure, pack finished product, described low taste salt lake sediment is Qinghai-Tibet low-grade salt lake sediment, wherein B
2O
3Content≤15%; Wherein
Raw ore removes sylvite, sodium salt is meant: crushing raw ore is become the fragment of 1～60mm, with 30～40 ℃ of warm water washings 2～3 times, make the content reduction by 35～55% of sylvite, sodium salt again;
High-temperature digestion is meant: the raw ore fragment after will washing is put into application number and is the horizontal revolving dissolver of " 200920080107.6 ", and by the ore deposit: water=2～4: 1 weight ratio adds entry, with Na
2B
4O
7Calculate, concentration is 35～52.5%, heats while stirring to 85～100 ℃, and is incubated 10～20 minutes, treat that borax dissolves fully after, starch from obtaining containing sludge with 40～80 purpose vibrosieves again;
Described horizontal revolving dissolver comprises stack shell, the horizontal setting of described stack shell, and stack shell is placed on the support roller, and the described stack shell of drive mechanism is done turning motion on support roller; One end of described stack shell has opening for feed, the other end has discharge port, charging guide plate and returning face plate have been covered with on the stack shell inwall, a plurality of charging guide plates form the guide panel, and a plurality of returning face plates form the stirring panel, are provided with steam inlet tube near discharge port end on stack shell, on stack shell, be provided with steam and go out pipe near feed inlet end, it is all fixing that described steam inlet tube and steam go out pipe, and be tightly connected with described stack shell, is provided with the bimetallic thermometer that detects temperature of charge at the charging oral-lateral;
Slag slurry separates and is meant: will above-mentionedly contain sludge and starch to separate down in 85～100 ℃ constant temperature and obtain containing mineral solution and filter cake, wherein filter cake reclaims washing lotion after with 85～100 ℃ hot wash, and merging contains mineral solution and the filter cake washing lotion gets mother liquor 1;
The solution decolouring is meant: under 85～100 ℃ constant temperature, add H in the mother liquor 1 of band look
2O
2, after decolouring, add polymeric flocculant again, wherein, through centrifugation, filtrate and filter cake washing lotion merge makes mother liquor 2 usefulness to throw out under 85～100 ℃ constant temperature, and then will merge in the back input cleaner through mother liquor after the decolouring 1 and mother liquor 2;
The cooling recrystallization is meant: with the mother liquor input application number after purifying treatment is in the horizontal continuous discharge crystallizer of " 200920080108.0 ", and be cooled to 65～70 ℃ indirectly with 40～60 ℃ water termostat, dissolved borax recrystallization from solution is come out;
Described horizontal continuous discharge crystallizer, comprise horizontal water tank, have entrance of cooling water and cooling water outlet on the water tank, in water tank, be provided with the materail tube more than, materail tube one end is provided with opening for feed, and the other end is provided with discharge port, is provided with the spiral propeller of high-temperature material in the materail tube being pushed to discharge port from opening for feed in the materail tube, described spiral propeller rotates through drive mechanism, and materail tube is provided with bimetallic thermometer near the discharging oral-lateral;
Dehydration is meant: the borax in the crystallizer is reinstated together with crystalline mother solution one be pumped into the screw unloading separating centrifuge, with the rotating speed more than 1200 rev/mins, make crystalline mother solution and borax separation, gained borax free water content≤10%.
The concrete technical scheme that the present invention adopts is as follows:
A kind of from low-grade salt lake sediment the method for enriching borax pentahydrate, it is characterized in that being undertaken by following processing step:
The salt lake raw ore fells and transports → and raw ore removes sylvite, sodium salt → high-temperature digestion → slag slurry separations → solution decolouring → cooling recrystallization → dehydration → oven dry → metering, packs, and the specific implementation method of each processing step is as follows:
One, the salt lake raw ore fells and transports
1, adopt excavator, shovel loader or dump truck to fell and transport for the borate raw ore in the playa lake.Described borate raw ore (B wherein
2O
3Content≤15%).
2, can fell and transport by following two kinds of methods for the borate raw ore under the lake water:
(1) adopt stifled lake to cut off the water supply, water pump is operated by the mode of playa lake after water is drained again.
(2) large-scale Sand pump is installed aboard ship, and after being equipped with reamer solid mineral being rubbed, with sand pump inhale, pipeline fortune, send raw ore to enter enrichment factory.
Described enrichment factory should be as far as possible in the addressing more nearby from the minery, and maximally utilises drop, to reduce the operation production cost.
Two, raw ore removes sylvite, sodium salt
After by hand picking out bulk sodium sulfate, stone, with crusher crushing raw ore is become the fragment of 1～60mm earlier, with 30～40 ℃ of warm water washings 2～3 times, make the content reduction by 35～55% of sylvite, sodium salt again.
The concentration that reduces sylvite, sodium salt is can not separate out sylvite or sodium salt when guaranteeing the borax crystallization.
Three, high-temperature digestion
Raw ore fragment after the washing is put into the horizontal revolving dissolver, and by the ore deposit: water=2～4: 1 weight ratio adds entry, with Na
2B
4O
7Calculate, concentration is 35～52.5%, heats while stirring to 85～100 ℃, and is incubated 10～20 minutes, treat that borax dissolves fully after, starch from obtaining containing sludge with 40～80 purpose vibrosieves again.
Described horizontal revolving dissolver has been applied for utility model patent on April 9th, 2009 to State Intellectual Property Office by the applicant, and the application number of this utility application is " 200920080107.6 ".
Four, the slag slurry separates
The above-mentioned sludge slurry that contains is sent in squeezing, plate cabinet or the vacuum type filter, under 85～100 ℃ constant temperature, separated obtaining containing mineral solution and filter cake; Wherein filter cake reclaims washing lotion after with 85～100 ℃ hot wash, merges to contain mineral solution and filter cake washing lotion, and mother liquid obtained 1 changes the decolouring pond over to decolours.
Five, solution decolouring
Under 85～100 ℃ constant temperature, in the mother liquor 1 of band look, add H
2O
2Decolour, add in the mother liquor 1 after the decolouring to do ore deposit weight and count 0.1～0.5% polymeric flocculant, with the impurity of absorption suspension; Wherein, through centrifugation, reclaim by filtrate under 85～100 ℃ constant temperature for throw out, and filter cake reclaims washing lotion and makes mother liquor 2 usefulness with filtrate merging through 85～100 ℃ hot wash.To merge through mother liquor after the decolouring 1 and mother liquor 2 then, and concentration will be controlled at 240～600g/l, remove detrimental impurity and water-insoluble in the mother liquor input cleaner after will merging again at last.
Described polymeric flocculant is an anionic polyacrylamide.
Described cleaner is more medium filter or automatic backwashing filter.
Six, cooling recrystallization
Mother liquor after purifying treatment is imported in the horizontal continuous discharge crystallizer, and be cooled to 65～70 ℃ indirectly, dissolved borax recrystallization from solution is come out with 40～60 ℃ water termostat.
Described horizontal continuous discharge crystallizer has been applied for utility model patent on April 9th, 2009 to State Intellectual Property Office by the applicant, and the application number of this utility application is " 200920080108.0 ".
Seven, dehydration
Borax in the crystallizer reinstated together with crystalline mother solution one be pumped into the screw unloading separating centrifuge, with the rotating speed more than 1200 rev/mins, make crystalline mother solution and borax separation, gained borax free water content≤10%.
Eight, oven dry
Isolated borax sent in the dryer dry.Bake out temperature is controlled at 100～122 ℃, and is incubated 10～20 minutes, gets BORAX PENTAHYDRATE-99.9 MIN.
Nine, metering, packing
With the oven dry after borax change in the aggregate bin of being furnished with air cooled chiller, cooled borax by numerical control or human metering pack respectively the BORAX PENTAHYDRATE-99.9 MIN finished product.
Beneficial effect of the present invention shows:
1, preparation technology of the present invention is simple, cost is low, can directly implement in the resource location, and constant product quality, also can make B simultaneously
2O
3Content reaches 66.75% higher-grade borax, but Turkey's borax of import substitution and U.S.'s borax, thereby non-renewable Resource Rationalization, in addition enrichment utilization, and products obtained therefrom substantially can be used for a plurality of industries, thereby reduce or need not from external import BORAX PENTAHYDRATE-99.9 MIN.
2, the present invention adopts the horizontal revolving dissolver to realize the rapid dissolving of borax under high-temperature stirring, thus can obtain having better performance index contain the sludge slurry, be more conducive to the slag slurry and fully separate.
3, the yield of borax of the present invention is up to more than 80%, thereby for the boron industry provides a large amount of source resources, solved the difficult problem that the existing boron resource of China is extremely limited to.
Embodiment
Embodiment 1
With Tibet Qiu Linan wood lake is example, through raw ore fell and transport → raw ore removes sylvite, sodium salt → high-temperature digestion → slag slurry separations → solution decolouring → cooling recrystallization → dehydration → oven dry → metering, packs, and obtains B
2O
3Content reaches 44.53% BORAX PENTAHYDRATE-99.9 MIN, and concrete processing step is as follows:
One, the salt lake raw ore fells and transports
Adopt excavator, shovel loader or dump truck to fell and transport raw ore.
Two, raw ore removes sylvite, sodium salt
After by hand picking out bulk sodium sulfate, stone, with crusher crushing raw ore is become the fragment of 1～30mm earlier, with 30～40 ℃ of warm water washings 2 times, make the content reduction by 40% of sylvite, sodium salt again.
Three, high-temperature digestion
Raw ore fragment after the washing is put into the horizontal revolving dissolver, and by the ore deposit: the weight ratio of water=3: 1 adds entry, with Na
2B
4O
7Calculate, concentration is 45.7%, heats while stirring to 85～100 ℃, is incubated after 10 minutes, starches from obtaining containing sludge with 60～80 purpose vibrosieves again.
Four, the slag slurry separates
The above-mentioned sludge slurry that contains is sent in the press type filter, under 85～100 ℃ constant temperature, separated obtaining containing mineral solution and filter cake; Wherein filter cake reclaims washing lotion after with 85～100 ℃ hot wash, merges to contain mineral solution and filter cake washing lotion, and mother liquid obtained 1 changes the decolouring pond over to decolours.
Five, solution decolouring
Under 85～100 ℃ constant temperature, in the mother liquor 1 of band look, add H
2O
2Decolour, add in the mother liquor 1 after the decolouring to do ore deposit weight and count 0.1～0.3% anionic polyacrylamide flocculation agent, wherein, throw out under 85～100 ℃ constant temperature through centrifugation, filtrate is reclaimed, filter cake reclaims washing lotion and makes mother liquor 2 usefulness with filtrate merging through 85～100 ℃ hot wash.To merge through mother liquor after the decolouring 1 and mother liquor 2 then, and concentration will be controlled at 450～600g/l, remove detrimental impurity and water-insoluble in the mother liquor input more medium filter after will merging again at last.
Described more medium filter is produced by Chengdu Danone development in science and technology Industrial Co., Ltd..
Six, cooling recrystallization
Mother liquor after purifying treatment is imported in the horizontal continuous discharge crystallizer, and be cooled to 65～70 ℃ indirectly, dissolved borax recrystallization from solution is come out with 40～60 ℃ water termostat.
Seven, dehydration
Borax in the crystallizer reinstated together with crystalline mother solution one be pumped into the screw unloading separating centrifuge, with the rotating speed more than 1200 rev/mins, make crystalline mother solution and borax separation, gained borax free water content≤10%.
Eight, oven dry
Isolated borax sent in the dryer dry.Bake out temperature is controlled at 120 ℃, and is incubated 10～15 minutes, gets BORAX PENTAHYDRATE-99.9 MIN.
Nine, metering, packing
With the oven dry after borax change in the aggregate bin of being furnished with air cooled chiller, cooled borax by digital control meter pack respectively the BORAX PENTAHYDRATE-99.9 MIN finished product.
This BORAX PENTAHYDRATE-99.9 MIN finished product detects through China Testing Technology Institute, and its relevant test data and result are as follows:
Embodiment 2
With Tibet Qiu Linan wood lake is example, through raw ore fell and transport → raw ore removes sylvite, sodium salt → high-temperature digestion → slag slurry separations → solution decolouring → cooling recrystallization → dehydration → oven dry → metering, packs, and obtains B
2O
3Content reaches 47.16% BORAX PENTAHYDRATE-99.9 MIN, and concrete processing step is as follows:
Two, the salt lake raw ore fells and transports
Adopt excavator, shovel loader or dump truck to fell and transport raw ore.
Two, raw ore removes sylvite, sodium salt
After by hand picking out bulk sodium sulfate, stone, with crusher crushing raw ore is become the fragment of 30～60mm earlier, with 30～40 ℃ of warm water washings 3 times, make the content reduction by 50% of sylvite, sodium salt again.
Three, high-temperature digestion
Raw ore fragment after the washing is put into the horizontal revolving dissolver, and by the ore deposit: the weight ratio of water=2: 1 adds entry, with Na
2B
4O
7Calculate, concentration is 50.3%, heats while stirring to 85～100 ℃, is incubated after 15 minutes, starches from obtaining containing sludge with 40～60 purpose vibrosieves again.
Four, the slag slurry separates
The above-mentioned sludge slurry that contains is sent in the vacuum type filter, under 85～100 ℃ constant temperature, separated obtaining containing mineral solution and filter cake; Wherein filter cake reclaims washing lotion after with 85～100 ℃ hot wash, merges to contain mineral solution and filter cake washing lotion, and mother liquid obtained 1 changes the decolouring pond over to decolours.
Five, solution decolouring
Under 85～100 ℃ constant temperature, in the mother liquor 1 of band look, add H
2O
2Decolour, add in the mother liquor 1 after the decolouring to do ore deposit weight and count 0.1～0.3% polymeric flocculant, wherein, throw out under 85～100 ℃ constant temperature through centrifugation, filtrate is reclaimed, and filter cake reclaims washing lotion and makes mother liquor 2 usefulness with filtrate merging through 85～100 ℃ hot wash.To merge through mother liquor after the decolouring 1 and mother liquor 2 then, and concentration will be controlled at 300～500g/l, remove detrimental impurity and water-insoluble in the mother liquor input automatic backwashing filter after will merging again at last.
Described automatic back flushing strainer is produced by the BeiJing WoTeRui Environment Protection Technology Co., Ltd.
Six, cooling recrystallization
Mother liquor after purifying treatment is imported in the horizontal continuous discharge crystallizer, is 40～60 ℃ water termostat indirectly after the cooling by temperature, and the dissolved borax can come out by recrystallization from solution.
Seven, dehydration
Borax in the crystallizer reinstated together with crystalline mother solution one be pumped into the screw unloading separating centrifuge, with the rotating speed more than 1200 rev/mins, make crystalline mother solution and borax separation, gained borax free water content≤10%.
Eight, oven dry
Isolated borax sent in the dryer dry.Bake out temperature is controlled at 100 ℃, and is incubated 10～15 minutes, gets BORAX PENTAHYDRATE-99.9 MIN.
Nine, metering, packing
With the oven dry after borax change in the aggregate bin of being furnished with air cooled chiller, cooled borax by digital control meter pack respectively the BORAX PENTAHYDRATE-99.9 MIN finished product.
This BORAX PENTAHYDRATE-99.9 MIN finished product through Tibet Autonomous Region survey innings centralab and detect, a B wherein
2O
3Measured value be 47.16%.
Embodiment 3
Implement horizontal revolving dissolver of the present invention (application number is " 200920080107.6 ") and comprise stack shell, the horizontal setting of described stack shell, stack shell is placed on the support roller, and the described stack shell of drive mechanism is done turning motion on support roller; One end of described stack shell has opening for feed, the other end has discharge port, charging guide plate and returning face plate have been covered with on the stack shell inwall, a plurality of charging guide plates form the guide panel, and a plurality of returning face plates form the stirring panel, are provided with steam inlet tube near discharge port end on stack shell, on stack shell, be provided with steam and go out pipe near feed inlet end, it is all fixing that described steam inlet tube and steam go out pipe, and be tightly connected with described stack shell, is provided with the bimetallic thermometer that detects temperature of charge at the charging oral-lateral.This dissolver adopts horizontal type structure, adopts self rotating mode stirring and guide, and material is dissolved in dissolver fully, thoroughly changed the mode of operation of vertical dissolver, and discharge port can not stop up, and just advances in the stack shell to clean without the special messenger yet, and prolonged work-ing life.
Embodiment 4
Implement horizontal continuous discharge crystallizer of the present invention (application number is " 200920080108.0 "), comprise horizontal water tank, have entrance of cooling water and cooling water outlet on the water tank, in water tank, be provided with the materail tube more than, materail tube one end is provided with opening for feed, the other end is provided with discharge port, be provided with the spiral propeller of high-temperature material in the materail tube being pushed to discharge port from opening for feed in the materail tube, described spiral propeller rotates through drive mechanism, and materail tube is provided with bimetallic thermometer near the discharging oral-lateral.This crystallizer adopts horizontal type structure, can carry out crystallization treatment to the high-temperature material in the many materail tubes simultaneously, and water coolant can contact with the materail tube outer wall directly, the heat exchanger effectiveness height is significantly improved, the also phenomenal growth of disposable crystallized stock amount has reduced production cost.
Embodiment 5
Automatic back flushing strainer of the present invention is produced by the BeiJing WoTeRui Environment Protection Technology Co., Ltd.Its every technology, performance and application indexes are as follows:
Range of application: the various water systems that are applicable to every profession and trade filter link, can replace sand filtration equipment.
Technical qualification: water inlet suspended substance≤150 mg/litre, go out water suspension 〉=5 mg/litre, impurity particle diameter 〉=15 micron, 65 ℃ of water temperatures, oil-containing≤20 mg/litre, minimum line pressure 0.3MPa, operating pressure can reach 2.5MPa.
Products characteristics: blowdown does not affect water supply, need not any external energy, realize that by equipment self pressure reduction automatic backflushing washes, and volume is little not to be taken up an area.
Claims (4)
1. the method for an enriching borax pentahydrate from low-grade salt lake sediment, it is characterized in that being undertaken by following processing step: the salt lake raw ore fells and transports → raw ore remove sylvite, sodium salt → high-temperature digestion → slag slurry separation → solution decolouring → cooling recrystallization → dewater → dry → measure, pack finished product, described low taste salt lake sediment is Qinghai-Tibet low-grade salt lake sediment, wherein B
2O
3Content≤15%; Wherein
Raw ore removes sylvite, sodium salt is meant: crushing raw ore is become the fragment of 1～60mm, with 30～40 ℃ of warm water washings 2～3 times, make the content reduction by 35～55% of sylvite, sodium salt again;
High-temperature digestion is meant: the raw ore fragment after will washing is put into application number and is the horizontal revolving dissolver of " 200920080107.6 ", and by the ore deposit: water=2～4: 1 weight ratio adds entry, with Na
2B
4O
7Calculate, concentration is 35～52.5%, heats while stirring to 85～100 ℃, and is incubated 10～20 minutes, treat that borax dissolves fully after, starch from obtaining containing sludge with 40～80 purpose vibrosieves again;
Described horizontal revolving dissolver comprises stack shell, the horizontal setting of described stack shell, and stack shell is placed on the support roller, and the described stack shell of drive mechanism is done turning motion on support roller; One end of described stack shell has opening for feed, the other end has discharge port, charging guide plate and returning face plate have been covered with on the stack shell inwall, a plurality of charging guide plates form the guide panel, and a plurality of returning face plates form the stirring panel, are provided with steam inlet tube near discharge port end on stack shell, on stack shell, be provided with steam and go out pipe near feed inlet end, it is all fixing that described steam inlet tube and steam go out pipe, and be tightly connected with described stack shell, is provided with the bimetallic thermometer that detects temperature of charge at the charging oral-lateral;
Slag slurry separates and is meant: will above-mentionedly contain sludge and starch to separate down in 85～100 ℃ constant temperature and obtain containing mineral solution and filter cake, wherein filter cake reclaims washing lotion after with 85～100 ℃ hot wash, and merging contains mineral solution and the filter cake washing lotion gets mother liquor 1;
The solution decolouring is meant: under 85～100 ℃ constant temperature, add H in the mother liquor 1 of band look
2O
2, after decolouring, add polymeric flocculant again, wherein, through centrifugation, filtrate and filter cake washing lotion merge makes mother liquor 2 usefulness to throw out under 85～100 ℃ constant temperature, and then will merge in the back input cleaner through mother liquor after the decolouring 1 and mother liquor 2;
The cooling recrystallization is meant: with the mother liquor input application number after purifying treatment is in the horizontal continuous discharge crystallizer of " 200920080108.0 ", and be cooled to 65～70 ℃ indirectly with 40～60 ℃ water termostat, dissolved borax recrystallization from solution is come out;
Described horizontal continuous discharge crystallizer, comprise horizontal water tank, have entrance of cooling water and cooling water outlet on the water tank, in water tank, be provided with the materail tube more than, materail tube one end is provided with opening for feed, and the other end is provided with discharge port, is provided with the spiral propeller of high-temperature material in the materail tube being pushed to discharge port from opening for feed in the materail tube, described spiral propeller rotates through drive mechanism, and materail tube is provided with bimetallic thermometer near the discharging oral-lateral;
Dehydration is meant: the borax in the crystallizer is reinstated together with crystalline mother solution one be pumped into the screw unloading separating centrifuge, with the rotating speed more than 1200 rev/mins, make crystalline mother solution and borax separation, gained borax free water content≤10%.
2. method according to claim 1 is characterized in that described polymeric flocculant is an anionic polyacrylamide in solution decolouring step.
3. method according to claim 1 and 2 is characterized in that the add-on of described polymeric flocculant in mother liquor 1, counts 0.1～0.5% to do ore deposit weight.
4. method according to claim 1 is characterized in that in described baking step, bake out temperature is controlled at 100～122 ℃, and is incubated 10～20 minutes, gets BORAX PENTAHYDRATE-99.9 MIN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101495689A CN101597068B (en) | 2009-04-09 | 2009-06-26 | Method for enriching borax pentahydrate from low-grade sediments in salt lakes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910058886.4 | 2009-04-09 | ||
| CN200910058886A CN101519212A (en) | 2009-04-09 | 2009-04-09 | Method for enriching borax pentahydrate from low-grade deposits of salt lake |
| CN2009101495689A CN101597068B (en) | 2009-04-09 | 2009-06-26 | Method for enriching borax pentahydrate from low-grade sediments in salt lakes |
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| CN101597068A CN101597068A (en) | 2009-12-09 |
| CN101597068B true CN101597068B (en) | 2011-05-11 |
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| CN200910058886A Pending CN101519212A (en) | 2009-04-09 | 2009-04-09 | Method for enriching borax pentahydrate from low-grade deposits of salt lake |
| CN2009101495689A Expired - Fee Related CN101597068B (en) | 2009-04-09 | 2009-06-26 | Method for enriching borax pentahydrate from low-grade sediments in salt lakes |
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| CN200910058886A Pending CN101519212A (en) | 2009-04-09 | 2009-04-09 | Method for enriching borax pentahydrate from low-grade deposits of salt lake |
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| CN101905889A (en) * | 2010-08-26 | 2010-12-08 | 大连交通大学 | Hot-blast air drying method for preparing borax pentahydrate |
| CN113955766B (en) * | 2021-11-25 | 2022-12-02 | 山东聚优新材料科技有限公司 | Method for preparing zinc borate by using zinc chloride in anion resin chlorination mother liquor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810643A (en) * | 2006-02-21 | 2006-08-02 | 西藏奇发矿业有限公司 | Process of extracting borax decahydrate from salt lake sediment |
| CN101337679A (en) * | 2008-08-28 | 2009-01-07 | 西藏掘鉒矿业有限公司 | Method for enriching magnesium borate and calcium borate powders form salt lake deposit |
-
2009
- 2009-04-09 CN CN200910058886A patent/CN101519212A/en active Pending
- 2009-06-26 CN CN2009101495689A patent/CN101597068B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810643A (en) * | 2006-02-21 | 2006-08-02 | 西藏奇发矿业有限公司 | Process of extracting borax decahydrate from salt lake sediment |
| CN101337679A (en) * | 2008-08-28 | 2009-01-07 | 西藏掘鉒矿业有限公司 | Method for enriching magnesium borate and calcium borate powders form salt lake deposit |
Non-Patent Citations (2)
| Title |
|---|
| 杨幼坤等.青海盐湖资源开发与利用.《矿冶》.2003,第12卷(第1期),67-70，74. * |
| 高世扬等.青藏高原盐湖硼酸盐矿物.《矿物学报》.1982,(第2期),107-112. * |
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| CN101519212A (en) | 2009-09-02 |
| CN101597068A (en) | 2009-12-09 |
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