CN208732621U - A kind of extraction tank for mid low grade phosphate rock - Google Patents
A kind of extraction tank for mid low grade phosphate rock Download PDFInfo
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- CN208732621U CN208732621U CN201821247235.0U CN201821247235U CN208732621U CN 208732621 U CN208732621 U CN 208732621U CN 201821247235 U CN201821247235 U CN 201821247235U CN 208732621 U CN208732621 U CN 208732621U
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Abstract
The utility model belongs to phosphorus ore phosphoric acid technical field made of stones, more particularly to a kind of extraction tank for mid low grade phosphate rock, including main extraction section, auxiliary extraction area, three, growing the grain area reaction zone, the main extraction section, auxiliary extraction area, growing the grain area are linked in sequence by connecting tube；Main extraction section is linked in sequence by slurry vessel, several main extraction tanks, overfall slot by connecting tube, and overfall slot is connect with slurry vessel by connecting tube；Growing the grain area is made of several growing the grain slots respectively, it is linked in sequence between each growing the grain slot by connecting tube, auxiliary extraction slot residue 40 ~ 50% slurry in auxiliary extraction area passes sequentially through all growing the grain slots, and least significant end growing the grain slot slurry enters filter, filtrate is phosphoric acid solution, and filter cake is calcium sulfate.The utility model realizes the efficient extraction of mid low grade phosphate rock, and obtains the good crystal of calcium sulfate of strainability, and extraction yield reaches 97%, and Washing ratio reaches 98.5%.
Description
Technical field
The invention belongs to phosphorus ore phosphoric acid technical fields made of stones, and in particular to a kind of extraction tank for mid low grade phosphate rock.
Background technique
Phosphoric acid is mainly used for the industry such as pharmacy, food, fertilizer, including as antirust agent, food additives, dentistry and orthopedic
Surgery, EDIC corrosive agent, electrolyte, scaling powder, dispersing agent, industrial corrosion agent, the raw material and component household cleaning product of fertilizer,
With wide application market.Phosphoric acid production is broadly divided into thermal phosphoric acid, phosphoric acid by wet process, and phosphoric acid by wet process is exactly rock phosphate in powder and strong acid
Extraction reaction occurs under certain index environment, the process of weak acid is made by strong acid, referred to as extracts.China's phosphor resource total amount is close
17000000000 tons, but the mid-low grade collophanite ore that cannot directly utilize is up to 11,000,000,000 tons, accounts for about the 65% of phosphor resource total amount.Nearly 40 years
Come, since most domestic bargh carries out the exploitation phychology of " it is poor to adopt rich abandoning ", causes the huge waste of phosphate rock resource.It makes
At China as the big demand state of rock phosphate in powder first in the world, remaining rich ore is only capable of maintaining more than ten years exploitation.In order to rationally utilize money
Sustainable development is realized in source, and research and development mid low grade phosphate rock phosphoric acid extraction technology is instantly extremely urgent thing.For in
The extraction of low-grade phosphate ore, original extraction tank for high-grade ore pulp is there are low output, product situation not up to standard, therefore
It is badly in need of a kind of extraction tank for mid low grade phosphate rock, effective realization is extracted with rock phosphate in powder and phosphoric acid is made.
Summary of the invention
To solve the above problems, the present invention provides a kind of extraction tank for mid low grade phosphate rock, effectively
Realization rock phosphate in powder, which extracts, is made phosphoric acid, and extraction yield is high.
Technical solution are as follows: a kind of extraction tank for mid low grade phosphate rock, including main extraction section, auxiliary extraction area, growing the grain
Three, area reaction zone, the main extraction section, auxiliary extraction area, growing the grain area are linked in sequence by connecting tube；
Main extraction section by slurry vessel, several main extraction tanks, overfall slot by connecting tube be linked in sequence, and overfall slot with
Slurry vessel is connected by connecting tube, and slurry vessel is added in phosphate ore pulp, and main extraction tank is added in sulfuric acid, and material passes sequentially through slurry vessel, master
Extraction tank, overfall slot, overfall slot slurry 60 ~ 70% return to slurry vessel, and 30 ~ 40% enter auxiliary extraction area；
Auxiliary extraction area mends acid tank and several auxiliary extraction slots by several and is linked in sequence by connecting tube, and last
One auxiliary extraction slot is connect with first benefit acid tank by connecting tube, and main 30 ~ 40% slurry of extraction section overfall slot residue enters auxiliary
First benefit acid tank for helping extraction section adds sulfuric acid mending acid tank, and material, which passes sequentially through, mends acid tank and auxiliary extraction slot, auxiliary extraction
It takes slot slurry 50 ~ 60% to return and mends acid tank, 40 ~ 50% enter growing the grain area；
Growing the grain area is made of several growing the grain slots respectively, is linked in sequence between each growing the grain slot by connecting tube, auxiliary extraction
Auxiliary extraction slot residue 40 ~ 50% slurry in area's passes sequentially through all growing the grain slots, and least significant end growing the grain slot slurry enters filter, filtrate
For phosphoric acid solution, filter cake is calcium sulfate.
Further, the main extraction section volume accounts for overall reaction volume 40 ~ 50%, and the auxiliary extraction area volume Zhan is total
Conversion zone volume 20 ~ 30%, growing the grain area volume account for overall reaction volume 20 ~ 30%.
Further, the main extraction tank number is 2 ~ 4, and the benefit acid tank is 2 ~ 3, and the auxiliary extraction slot is 3 ~ 8
It is a.
Further, the sulfuric acid concentration that the main extraction tank and benefit acid tank are added is 80 ~ 90%.
Further, the concentration that phosphate ore pulp is added in the slurry vessel is 20 ~ 30%.
Further, the slurry vessel, main extraction tank, overfall slot, mend acid tank, auxiliary extraction slot, be provided in growing the grain slot
Agitating device.
Further main extraction section, auxiliary extraction area, growing the grain area height once reduce, in order to main extraction section, auxiliary extraction
Take area, growing the grain area liquid can smooth flow, reach good reaction effect.
Beneficial effects of the present invention: the generally existing reactivity of mid low grade phosphate rock is low, impurity content is high, causes side reaction
It is more, phosphoric acid is big, crystallize tiny, phosphorus ore particle and be easy to appear package.The height of mid low grade phosphate rock is realized by this patent
Effect extraction, and the good crystal of calcium sulfate of strainability is obtained, extraction yield reaches 97%, and Washing ratio reaches 98.5%.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model
1- slurry vessel, the 2- main extraction tank II of main extraction tank I, 3-, 4- overfall slot, 5- mend acid tank I, and 6- mends acid tank II, 7-
Auxiliary extraction slot I, 8- auxiliary extraction slot II, 9- auxiliary extraction slot III, 10- auxiliary extraction slot V, 11- growing the grain slot I, 12- are feeding
Brilliant slot II, 13- growing the grain slot III, 14- growing the grain slot V, 15- growing the grain slot VI, 16- growing the grain slot VII.
Specific embodiment
As shown in Figure 1, being made of 1 slurry vessel, 2 main extraction tanks, 2 benefit acid tanks, 4 auxiliary extraction slots, 6 growing the grain slots
Extraction tank for, specifically introduce its operational process, be provided with agitating device in each slot.
Embodiment 1
Main extraction section volume accounts for overall reaction volume 40%, and main extraction section is by slurry vessel 1, main extraction tank 2, main extraction tank
3, overfall slot 4 form, slurry vessel 1, main extraction tank I2, main extraction tank II3, overfall slot 4 by connecting tube sequence head and the tail connection (
It is exactly 1,2,3,4 sequential connections, 4 and 1 connection), slurry vessel 1 is added in the phosphate ore pulp that concentration is 20%, and the sulfuric acid that concentration is 80% adds
Extraction tank I2 and main extraction tank II3 are become owner of, material passes sequentially through 1,2,3,4, and the slurry 60% in overfall slot 4 returns to slurry vessel 1,
40% enters benefit acid tank I5；
Auxiliary extraction area volume accounts for overall reaction volume 30%, and auxiliary extraction area is by benefit acid tank I5, benefit acid tank II6, auxiliary
Extraction tank I7, auxiliary extraction slot II8, auxiliary extraction slot III9, auxiliary extraction slot V10 composition, mend acid tank I5, mend acid tank II6, is auxiliary
Extraction tank I7, auxiliary extraction slot II8, auxiliary extraction slot III9, auxiliary extraction slot V10 is helped to connect by connecting tube sequence head and the tail
(it is logical to mend acid tank I5, benefit acid tank II6, auxiliary extraction slot I7, auxiliary extraction slot II8, auxiliary extraction slot III9, auxiliary extraction slot V10
Connecting tube sequential connection is crossed, auxiliary extraction slot V10 is connected with benefit acid tank I5 by connecting tube), adding concentration in right amount 5 and 6 is
80% sulfuric acid, material pass sequentially through 5,6,7,8,9,10, and auxiliary extraction slot V10 slurry 50%, which returns, mends acid tank I5, and 50% entrance is supported
Brilliant slot 11；
Growing the grain area volume accounts for overall reaction volume 30%, and growing the grain area is by growing the grain slot I1, growing the grain slot II12, growing the grain slot
III13, growing the grain slot V14, growing the grain slot VI 15 and growing the grain slot VI 16 form, and growing the grain slot 11,12,13,14,15 and 16 passes through connecting tube
Being linked in sequence, (growing the grain slot 11,12,13,14,15,16 is connected by connecting tube sequence, but the not phase from beginning to end of growing the grain slot 11 and 16
Even), material passes sequentially through growing the grain slot 11,12,13,14,15,16, and VI 16 slurry of growing the grain slot enters filter, and filtrate is that phosphoric acid is molten
Liquid, filter cake are calcium sulfate.
Embodiment 2
Main extraction section volume accounts for overall reaction volume 50%, and main extraction section is by slurry vessel 1, main extraction tank 2, main extraction tank
3, overfall slot 4 form, slurry vessel 1, main extraction tank I2, main extraction tank II3, overfall slot 4 by connecting tube sequence head and the tail connection (
It is exactly 1,2,3,4 sequential connections, 4 and 1 connection), slurry vessel 1 is added in the phosphate ore pulp that concentration is 20%, and the sulfuric acid that concentration is 80% adds
Extraction tank I2 and main extraction tank II3 are become owner of, material passes sequentially through 1,2,3,4, and the slurry 60% in overfall slot 4 returns to slurry vessel 1,
40% enters benefit acid tank I5；
Auxiliary extraction area volume accounts for overall reaction volume 25%, and auxiliary extraction area is by benefit acid tank I5, benefit acid tank II6, auxiliary
Extraction tank I7, auxiliary extraction slot II8, auxiliary extraction slot III9, auxiliary extraction slot V10 composition, mend acid tank I5, mend acid tank II6, is auxiliary
Extraction tank I7, auxiliary extraction slot II8, auxiliary extraction slot III9, auxiliary extraction slot V10 is helped to connect by connecting tube sequence head and the tail
(it is logical to mend acid tank I5, benefit acid tank II6, auxiliary extraction slot I7, auxiliary extraction slot II8, auxiliary extraction slot III9, auxiliary extraction slot V10
Connecting tube sequential connection is crossed, auxiliary extraction slot V10 is connected with benefit acid tank I5 by connecting tube), adding concentration in right amount 5 and 6 is
80% sulfuric acid, material pass sequentially through 5,6,7,8,9,10, and auxiliary extraction slot V10 slurry 50%, which returns, mends acid tank I5, and 50% entrance is supported
Brilliant slot 11；
Growing the grain area volume accounts for overall reaction volume 25%, and growing the grain area is by growing the grain slot I1, growing the grain slot II12, growing the grain slot
III13, growing the grain slot V14, growing the grain slot VI 15 and growing the grain slot VI 16 form, and growing the grain slot 11,12,13,14,15 and 16 passes through connecting tube
Being linked in sequence, (growing the grain slot 11,12,13,14,15,16 is connected by connecting tube sequence, but the not phase from beginning to end of growing the grain slot 11 and 16
Even), material passes sequentially through growing the grain slot 11,12,13,14,15,16, and VI 16 slurry of growing the grain slot enters filter, and filtrate is that phosphoric acid is molten
Liquid, filter cake are calcium sulfate.
Basic principle of the invention:
Phosphoric acid by wet process is also referred to as extracted using the method for phosphoric acid obtained by sulfuric acid or other strong acid decomposing phosphate rocks.Main extraction
Take that area's stirring intensity is big, it is big to return slurry amount, being conducive to dispersed material as early as possible reduces degree of supersaturation, improves extraction yield；Auxiliary extraction area
Stirring intensity is larger, returns slurry amount, advantageously reduces plane of crystal degree of supersaturation, promotes crystal growth；Growing the grain area stirring intensity
It is smaller, do not return slurry, advantageously reduce the generation of broken nucleus, be further reduced plane of crystal degree of supersaturation, promote crystal at
It is long, improve intensity filter.
It is to make full use of the hydrogen ion in return slurry to phosphorus that 1st area, which is added phosphate ore pulp and mixes with 70% return slurry,
Mine particle is decomposed, and enters the calcium ion in phosphorus ore in solution, while largely returning the degree of supersaturation of slurry reduction system, is subtracted
The generation of few nucleus avoids phosphorus ore particle from generating package phenomenon；2,3rd area are for utilization sulfate radical combination calcium ion formation calcium sulfate
(gypsum) precipitating, while further decomposing phosphate rock, being separately added into sulfuric acid is the degree of supersaturation in order to reduce system, reduces nucleus
It generates, phosphorus ore particle is avoided to generate package phenomenon；4 area's slurry a part enter 5th area and continue to extract, and another part returns to 1
Area adjusts technic index.
Auxiliary extraction area: being divided into 6 reaction zones, according to the technological requirements, adds sulfuric acid in right amount in the area 5-6, material successively leads to
The area 5-6-7-8-9-10 reactive tank is crossed, 10 area's reactive tank slurry a part return to 5th area, and another part enters 5 area's reactive tanks；
5,6th area are in order to form calcium sulfate (gypsum) using sulfate radical combination calcium ion, while further decomposing phosphate rock, respectively
It is the degree of supersaturation in order to reduce system that sulfuric acid, which is added, reduces the generation of nucleus, phosphorus ore particle is avoided to generate package phenomenon；7,8,
9,10th area further eliminate slurry degree of supersaturation, further decomposing phosphate rock.Slurry enters 11st area and continues growing the grain.
Growing the grain area: being divided into 6 reaction zones, and material passes sequentially through the area 11-12-13-14-15-16 reactive tank, 16 area's reactive tanks
Slurry enters filter.
The effect in the area 11-16 is mainly under the conditions of mildly reaction (low stirring intensity), gradually by the tiny crystalline substance in slurry
Body is dissolved into liquid phase, at the same by liquid phase sulfate ion and calcium ion be transferred to gypsum crystal surface, eliminate supersaturation
Degree promotes crystal further to grow up.
This patent realizes the efficient extraction of mid low grade phosphate rock, and obtains the good crystal of calcium sulfate of strainability,
Extraction yield reaches 97%, and Washing ratio reaches 98.5%.
The generally existing reactivity of mid low grade phosphate rock is low, impurity content is high, causes that side reaction is more, phosphoric acid is big, knot
Brilliant tiny, phosphorus ore particle is easy to appear package.By the method for this patent technique, stirring is increased in early period and returns slurry amount, is used
Subregion charging, sufficiently reduction degree of supersaturation, abundant Regeneration response surface greatly improves extraction yield.The middle and later periods take by
Step reduces stirring intensity, appropriateness returns slurry, increases the residence time, carries out extraction reaction sufficiently, while fine crystalline being dissolved, promotees
It further grows up into gypsum crystal, not only increases extraction yield, simultaneously as crystallization is coarse, intensity filter and Washing ratio are also significantly
It improves.
The slurry vessel, main extraction tank, overfall slot, mend acid tank, auxiliary extraction slot, the difference between growing the grain slot are groove bodies
Constituent material and structure are essentially the same, are exactly effect difference in process of production.
System waste heat is cooling using extraction, extraction tail gas through three-level wash it is up to standard after empty through chimney.
Claims (6)
1. a kind of extraction tank for mid low grade phosphate rock, which is characterized in that including main extraction section, auxiliary extraction area, growing the grain area
Three reaction zones, the main extraction section, auxiliary extraction area, growing the grain area are linked in sequence by connecting tube；
Main extraction section is linked in sequence by slurry vessel, several main extraction tanks, overfall slot by connecting tube, and overfall slot and slurry
Slot is connected by connecting tube, and slurry vessel is added in phosphate ore pulp, and main extraction tank is added in sulfuric acid, and material passes sequentially through slurry vessel, main extraction
Slot, overfall slot；
Auxiliary extraction area mends acid tank and several auxiliary extraction slots by several and is linked in sequence by connecting tube, and the last one
Auxiliary extraction slot is connect with first benefit acid tank by connecting tube；
Growing the grain area is made of several growing the grain slots respectively, is linked in sequence between each growing the grain slot by connecting tube.
2. a kind of extraction tank for mid low grade phosphate rock as described in claim 1, which is characterized in that least significant end growing the grain slot material
Slurry enters filter, and filtrate is phosphoric acid solution, and filter cake is calcium sulfate.
3. a kind of extraction tank for mid low grade phosphate rock as described in claim 1, which is characterized in that the main extraction section holds
Product accounts for overall reaction volume 40 ~ 50%, and auxiliary extraction area volume accounts for overall reaction volume 20 ~ 30%, the growing the grain area
Volume accounts for overall reaction volume 20 ~ 30%.
4. a kind of extraction tank for mid low grade phosphate rock as described in claim 1, which is characterized in that
The main extraction tank number is 2 ~ 4, and the benefit acid tank is 2 ~ 3, and the auxiliary extraction slot is 3 ~ 8.
5. a kind of extraction tank for mid low grade phosphate rock as described in claim 1, which is characterized in that the slurry vessel, master
Extraction tank, overfall slot mend acid tank, auxiliary extraction slot, are provided with agitating device in growing the grain slot.
6. a kind of extraction tank for mid low grade phosphate rock as described in claim 1, which is characterized in that the overfall slot slurry
60 ~ 70% return to slurry vessel, and 30 ~ 40% enter auxiliary extraction area；Main 30 ~ 40% slurry of extraction section overfall slot residue enters auxiliary extraction
First benefit acid tank for taking area adds sulfuric acid mending acid tank, and material, which passes sequentially through, mends acid tank and auxiliary extraction slot, auxiliary extraction slot
Slurry 50 ~ 60%, which returns, mends acid tank, and 40 ~ 50% enter growing the grain area；40 ~ 50% slurry of auxiliary extraction area auxiliary extraction slot residue is successively
Pass through all growing the grain slots.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108622868A (en) * | 2018-08-03 | 2018-10-09 | 禄丰天宝磷化工有限公司 | A kind of extraction tank for mid low grade phosphate rock |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108622868A (en) * | 2018-08-03 | 2018-10-09 | 禄丰天宝磷化工有限公司 | A kind of extraction tank for mid low grade phosphate rock |
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Address after: 651203 Shalang village, Qinfeng Town, Lufeng County, Chuxiong Yi Autonomous Prefecture, Yunnan Province Patentee after: Tianbao Animal Nutrition Technology Co., Ltd Address before: 675000 Yunnan Yi Autonomous Prefecture in Chuxiong Province Qin Lufeng County Fengzhen village of Sharon Patentee before: Lufeng Tianbao Phosphorus Chemical Co., Ltd. |