CN109879293A - A kind of method of microfine high-silicon iron ore desiliconization coproduction potassium silicate - Google Patents
A kind of method of microfine high-silicon iron ore desiliconization coproduction potassium silicate Download PDFInfo
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- CN109879293A CN109879293A CN201910233974.7A CN201910233974A CN109879293A CN 109879293 A CN109879293 A CN 109879293A CN 201910233974 A CN201910233974 A CN 201910233974A CN 109879293 A CN109879293 A CN 109879293A
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- iron ore
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- potassium silicate
- silicon
- silicon iron
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 84
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 62
- 239000010703 silicon Substances 0.000 title claims abstract description 62
- 235000019353 potassium silicate Nutrition 0.000 title claims abstract description 33
- 239000004111 Potassium silicate Substances 0.000 title claims abstract description 32
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052913 potassium silicate Inorganic materials 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 26
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 59
- 239000003513 alkali Substances 0.000 claims abstract description 46
- 239000003337 fertilizer Substances 0.000 claims abstract description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 30
- 239000012141 concentrate Substances 0.000 claims abstract description 25
- 238000003801 milling Methods 0.000 claims abstract description 13
- 238000004090 dissolution Methods 0.000 claims abstract description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000005406 washing Methods 0.000 claims description 16
- 238000002386 leaching Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 6
- 229940072033 potash Drugs 0.000 claims description 5
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 5
- 235000015320 potassium carbonate Nutrition 0.000 claims description 5
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 4
- 239000011707 mineral Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 229910052681 coesite Inorganic materials 0.000 description 11
- 229910052906 cristobalite Inorganic materials 0.000 description 11
- 229910052682 stishovite Inorganic materials 0.000 description 11
- 229910052905 tridymite Inorganic materials 0.000 description 11
- 239000000377 silicon dioxide Substances 0.000 description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 9
- 238000001914 filtration Methods 0.000 description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- 239000002689 soil Substances 0.000 description 7
- 238000011084 recovery Methods 0.000 description 5
- 238000000227 grinding Methods 0.000 description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 2
- 229910001919 chlorite Inorganic materials 0.000 description 2
- 229910052619 chlorite group Inorganic materials 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 2
- 229910052570 clay Inorganic materials 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 230000007775 late Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000021749 root development Effects 0.000 description 1
- 230000002786 root growth Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Fertilizers (AREA)
Abstract
The invention belongs to Mineral Processing Engineering technical fields, disclose a kind of method of microfine high-silicon iron ore desiliconization coproduction potassium silicate, and the method for the microfine high-silicon iron ore desiliconization coproduction potassium silicate utilizes alkali by the SiO in high-silicon iron ore under the conditions of temperature-pressure2Dissolution abjection obtains high grade iron concentrate and water-soluble potassium silicate fertilizer；By control alkali mine, when pulp density carries out grind grading, controls 150~300 DEG C of temperature, 0.5~3MPa of pressure is leached；Alkali mine ratio is mass ratio 1:5~1:2；Ore milling concentration is 60~80%；Grind grading product fineness is -200 mesh >=75%.The present invention is compared with well known technology, using alkali (mainly potassium hydroxide or being furnished with based on potassium hydroxide suitable sodium hydroxide) by the SiO in high-silicon iron ore2Dissolution abjection obtains high grade iron concentrate and water-soluble potassium silicate fertilizer, realizes the high level high-efficiency comprehensive utilization of microfine refractory iron ore, and the present invention has the characteristics that iron recycling is high, process flow is simple, the discharge of clean manufacturing, anury.
Description
Technical field
The invention belongs to Mineral Processing Engineering technical field more particularly to a kind of microfine high-silicon iron ore desiliconization coproduction silicic acid
The method of potassium.
Background technique
Currently, the immediate prior art: microfine high-silicon iron ore passes through since the embedding cloth of grain is thin, monomer dissociation is difficult
Ore is readily formed subparticle after muck and ore grinding, along with the big feature of its clay content, belongs to complex refractory ore.In recent years
Come that China's development of iron & steel industry is rapid, the poor Iron Ore Reserve of high-grad iron ore deposit and Yi Xuan are gradually decreasing, iron ore external dependence degree
Height, how to exploit Refractory iron ore becomes one of the key project of Current resource comprehensive utilization.In recent years, domestic dresser
Author has done a large amount of work to the ore dressing of high-silicon iron ore, and obtains certain progress, but still fine fundamentally to solve always
The development and utilization problem of grain high-silicon iron ore.Research contents include direct-reduction process, high-gradient magnetic separation, Selective agglomeration-reverse flotation,
Reverse floatation process, whole ore roasting-magnetic separation, raw ore flash magnetization roasting-magnetic separation-reverse floatation process etc., moreover, ore dressing obtains Gao Pin
While the iron ore concentrate of position, a large amount of tailing is produced.
The world siliceous fertilizer Yi Bei soil educational circles is confirmed as the 4th kind of growth elements fertilizer, siliceous fertilizer conduct after nitrogen, phosphorus, potash fertilizer
New-type fertilizer plays an increasingly important role in agricultural production: (1) siliceous fertilizer is the indispensable element of crop growth；(2) silicon
Fertilizer is the health care fertilizer of crops；(3) siliceous fertilizer is the quality fertilizer of crops；(4) siliceous fertilizer is the nutrition adjustment fertilizer of crops
Material；(5) siliceous fertilizer has the function of volume increase, upgrading；(6) siliceous fertilizer has the function of resistant to lodging, disease and insect resistance, drought-resistant；(7) siliceous fertilizer
Have the function of promoting photosynthesis, promotes root growth and development, promotes efficient nutrient use；(8) siliceous fertilizer has effect passivation weight
Metal mitigates heavy metal pollution of soil, improves the effect of soil alkali.As it can be seen that the research of novel siliceous fertilizer and application are to improving me
State's agricultural production has important practical significance.
Siliceous fertilizer can be divided into Water-soluble silicon fertilizer and solubility in citric acid siliceous fertilizer by the type of effective silicon, had their own characteristics: water-soluble silicon
Fertilizer has quick-acting, but easy leaching loss after being manured into soil, fertilizer efficiency are short；Solubility in citric acid siliceous fertilizer has late effect property, and silicon discharges after being manured into soil
Relatively slowly, fertilizer efficiency is long.
In conclusion problem of the existing technology is: the complicated microfine refractory iron ore of the prior art is difficult to develop
It utilizes, causes seriously polluted.The present invention solves the problems, such as that this can realize the high-efficiency comprehensive utilization of such iron resource, anury discharge.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of microfine high-silicon iron ore desiliconization coproduction potassium silicates
Method.
The invention is realized in this way a kind of method of microfine high-silicon iron ore desiliconization coproduction potassium silicate, the microfine
The method of high-silicon iron ore desiliconization coproduction potassium silicate utilizes alkali by the SiO in high-silicon iron ore2Dissolution abjection, obtains high grade iron concentrate
With water-soluble potassium silicate fertilizer；By control alkali mine, when pulp density carries out grind grading, controls 150~300 DEG C of temperature, pressure
0.5~3MPa is leached；Alkali mine ratio is mass ratio 1:5~1:2；Ore milling concentration is 60~80%；Grind grading product fineness be-
200 mesh >=75%.By controlling above each technical data, the chemistry of silicones in iron can be deviate to obtain high grade iron essence
Mine, and comprehensively utilize silicon.
Further, the microfine high-silicon iron ore desiliconization coproduction potassium silicate method the following steps are included:
High-silicon iron ore, alkali, water are given to ball mill by the when ore milling concentration requirement of alkali mine and carry out grind grading extremely by the first step
Certain fineness ore milling product；
The ore pulp containing alkali mine ratio of milled is given to autoclave by second step, controls reaction temperature and pressure stirring
It leaches, makes the SiO in alkali and high-silicon iron ore2Sufficiently reaction；
Third step filters controlled at 60~90 DEG C, respectively obtains leachate potassium silicate product and leached mud, leached mud
Washing obtains high grade iron concentrate, realizes that the high level of high silicon iron resource efficiently utilizes；
Leached mud washing water is returned as mill mining water, recycles wherein remaining alkali by the 4th step.
Further, the alkali of the first step is potassium hydroxide or is furnished with sodium hydroxide based on potassium hydroxide.
Further, the alkali extraction temperature of the second step is 150~300 DEG C, and pressure is 0.5~3MPa, when leaching
Between be 30~240 minutes, make the SiO in alkali and high-silicon iron ore2Sufficiently reaction.
Further, the third step control temperature is filtered at 60~90 DEG C, respectively obtains leachate potassium silicate product and leaching
It slags tap, leached mud washs to obtain high grade iron concentrate.
Another object of the present invention is to provide a kind of methods by the microfine high-silicon iron ore desiliconization coproduction potassium silicate
Obtained iron ore concentrate.
In conclusion advantages of the present invention and good effect are as follows: what the conventional technique of preparing of present invention solution cannot be handled answers
Miscellaneous microfine refractory iron ore, and potassium silicate can be converted as soil conditioner for silicon therein and used, realize that such iron provides
The high-efficiency comprehensive utilization in source, anury discharge.The present invention using alkali (mainly potassium hydroxide or based on potassium hydroxide equipped with appropriate
Sodium hydroxide, according to quality than potassium hydroxide: sodium hydroxide=1:0~1:1) by the SiO in high-silicon iron ore2Dissolution, washing
It is obtained by filtration high grade iron concentrate, the iron ore concentrate rate of recovery almost 100%.Leachate is potassium silicate Water-soluble silicon fertilizer, is realized
The high level of silicon efficiently utilizes in microfine refractory iron ore.Leached mud washing water is returned as mill mining water, is further recycled
Using wherein remaining alkali, clean manufacturing, anury discharge are realized.
Detailed description of the invention
Fig. 1 is the method flow diagram of microfine high-silicon iron ore desiliconization coproduction potassium silicate provided in an embodiment of the present invention.
Fig. 2 is the method implementation flow chart of microfine high-silicon iron ore desiliconization coproduction potassium silicate provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Easy leaching loss, fertilizer efficiency are short after being manured into soil for existing Water-soluble silicon fertilizer.Silicon discharges after solubility in citric acid siliceous fertilizer is manured into soil
Slower problem.The present invention will be in high-silicon iron ore equipped with suitable sodium hydroxide using potassium hydroxide or based on potassium hydroxide
SiO2Dissolution obtains potassium silicate Water-soluble silicon fertilizer while obtaining high grade iron concentrate, realizes microfine refractory iron ore
The high level high-efficiency comprehensive utilization of stone, clean manufacturing, anury discharge.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
As shown in Figure 1, the method for microfine high-silicon iron ore desiliconization coproduction potassium silicate provided in an embodiment of the present invention include with
Lower step:
S101: high-silicon iron ore, alkali, water are given to ball mill by the when ore milling concentration requirement of alkali mine and carry out grind grading to one
Determine fineness ore milling product；
S102: being given to autoclave for the ore pulp containing certain alkali mine ratio of milled, control certain reaction temperature and
Pressure leaching makes the SiO in alkali and high-silicon iron ore2Sufficiently reaction；
S103: filtering controlled at 60~90 DEG C, respectively obtains leachate potassium silicate product and leached mud, leaches wash heat
It washs to obtain high grade iron concentrate, realizes that the high level of high silicon iron resource efficiently utilizes；
S104: leached mud washing water being returned as mill mining water, wherein remaining alkali is further recycled, and is realized clear
Clean production, anury discharge.
In a preferred embodiment of the invention, the alkali of step S101 mainly potassium hydroxide or with potassium hydroxide it is
Main to be furnished with suitable sodium hydroxide, in step s101, by control alkali mine, when pulp density carries out grind grading, alkali mine ratio
For mass ratio 1:5~1:2；Ore milling concentration is 60~80%；Grind grading product fineness is generally -200 mesh >=75%.
In a preferred embodiment of the invention, in step s 102, alkali extraction temperature is 150~300 DEG C, pressure 0.5
~3MPa, leaching time are 30~240 minutes, make the SiO in alkali and high-silicon iron ore2Sufficiently reaction.
In a preferred embodiment of the invention, in step s 103, control temperature is filtered at 60~90 DEG C, respectively obtains leaching
Liquid potassium silicate product and leached mud out, leached mud wash to obtain high grade iron concentrate, realize that the high level of high silicon iron resource is efficiently sharp
With.
In a preferred embodiment of the invention, in step S104, leached mud washing water is returned and is used as mill mining water, into
One step recycles wherein remaining alkali.
Application principle of the invention is further described combined with specific embodiments below.
Embodiment 1:
The high silicon hematite-limonite in Yunnan, ferrous grade 38.12% contain SiO227.43%, the iron and silicon in ore are in micro-
Fine-grained disseminated grain, silicon mainly with quartz form exist, average particle size≤10 μm, alkali mine ratio be 1:3, ore milling concentration 80%,
Ore grinding is to -200 mesh 75%, leaching 1 hour in autoclave, and extraction temperature is 300 DEG C, and leaching pressure is 3MPa,
80 DEG C of filterings are cooled to, are obtained by filtration containing K2O 20%, SiO230% silicic acid potash fertilizer, residue washing obtain ferrous grade and are
64.43%, contain SiO22.31% high-order iron ore concentrate, the iron ore concentrate rate of recovery almost 100%, washing water are can be recycled.
Embodiment 2:
The high silicon bloodstone in Guizhou, ferrous grade 47.21% contain SiO217.32%, gangue mineral mainly have quartz,
Chlorite, clay, average particle size≤5 μm of ore, alkali mine ratio are 1:5, ore milling concentration 60%, ore grinding to -200 mesh 80%,
Leaching 2 hours in autoclave, extraction temperature are 150 DEG C, and leaching pressure is 0.5MPa, are cooled to 90 DEG C of filterings,
It is obtained by filtration containing K2O 16%, SiO225% silicic acid potash fertilizer, it is 68.72% that residue washing, which obtains ferrous grade, is contained
SiO21.31% high-order iron ore concentrate, the iron ore concentrate rate of recovery almost 100%, washing water are can be recycled.
Embodiment 3:
The high silicon limonite in Sichuan, ferrous grade 37.11% contain SiO216.32%, gangue mineral mainly have quartz,
Chlorite, clay, average particle size≤5 μm of ore, alkali mine ratio are 1:2, ore milling concentration 75%, ore grinding to -200 mesh 85%,
Leaching 1 hour in autoclave, extraction temperature are 300 DEG C, and leaching pressure is 3MPa, is cooled to 60 DEG C of filterings, mistake
Filter is obtained containing K2O 20%, SiO220% silicic acid potash fertilizer, it is 54.72% that residue washing, which obtains ferrous grade, contains SiO21.31%
Iron ore concentrate, the iron ore concentrate rate of recovery almost 100%, washing water is can be recycled.
The present invention utilizes alkali (mainly potassium hydroxide or being furnished with suitable sodium hydroxide based on potassium hydroxide) by high silicon
SiO in iron ore2Dissolution, washing are obtained by filtration high grade iron concentrate, the iron ore concentrate rate of recovery almost 100%.Leachate is silicon
Sour potassium Water-soluble silicon fertilizer, the high level for realizing silicon in microfine refractory iron ore efficiently utilize.Leached mud washing water is returned and is made
To grind mining water, wherein remaining alkali is further recycled, realizes clean manufacturing, anury discharge.
The present invention compared with well known technology, using alkali (mainly potassium hydroxide or based on potassium hydroxide equipped with appropriate
Sodium hydroxide) by the SiO in high-silicon iron ore2Dissolution abjection obtains high grade iron concentrate and water-soluble potassium silicate fertilizer, realizes
The high level high-efficiency comprehensive utilization of microfine refractory iron ore, the present invention have iron recycling is high, process flow is simple, clean manufacturing,
The features such as anury discharges.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of method of microfine high-silicon iron ore desiliconization coproduction potassium silicate, which is characterized in that the microfine high-silicon iron ore is de-
The method of silicon coproduction potassium silicate utilizes alkali by the SiO in high-silicon iron ore2Dissolution abjection, obtains high grade iron concentrate and water-soluble silicon
Sour potash fertilizer；By control alkali mine, when pulp density carries out grind grading, controls 150~300 DEG C of temperature, 0.5~3MPa of pressure
It leaches；Alkali mine ratio is mass ratio 1:5~1:2；Ore milling concentration is 60~80%；Grind grading product fineness be -200 mesh >=
75%.
2. the method for microfine high-silicon iron ore desiliconization coproduction potassium silicate as described in claim 1, which is characterized in that described fine
Grain high-silicon iron ore desiliconization coproduction potassium silicate method the following steps are included:
High-silicon iron ore, alkali, water are given to ball mill by the when ore milling concentration requirement of alkali mine and carry out grind grading to certain by the first step
Fineness ore milling product；
The ore pulp containing alkali mine ratio of milled is given to autoclave, controls reaction temperature and pressure leaching by second step,
Make the SiO in alkali and high-silicon iron ore2Sufficiently reaction；
Third step filters controlled at 60~90 DEG C, respectively obtains leachate potassium silicate product and leached mud, leached mud washing
High grade iron concentrate is obtained, realizes that the high level of high silicon iron resource efficiently utilizes；
Leached mud washing water is returned as mill mining water, recycles wherein remaining alkali by the 4th step.
3. the method for microfine high-silicon iron ore desiliconization coproduction potassium silicate as claimed in claim 2, which is characterized in that described first
The alkali of step is potassium hydroxide or is furnished with sodium hydroxide based on potassium hydroxide；According to quality than potassium hydroxide: sodium hydroxide=1:0
~1:1.
4. the method for microfine high-silicon iron ore desiliconization coproduction potassium silicate as claimed in claim 2, which is characterized in that described second
The alkali extraction temperature of step is 150~300 DEG C, and pressure is 0.5~3MPa, and the leaching time is 30~240 minutes, makes alkali and height
SiO in avasite2Sufficiently reaction.
5. the method for microfine high-silicon iron ore desiliconization coproduction potassium silicate as claimed in claim 2, which is characterized in that the third
Step control temperature is filtered at 60~90 DEG C, respectively obtains leachate potassium silicate product and leached mud, leached mud washs to obtain Gao Pin
Position iron ore concentrate.
What 6. a kind of method of the microfine high-silicon iron ore desiliconization coproduction potassium silicate as described in Claims 1 to 5 any one obtained
Iron ore concentrate.
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2019
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Application publication date: 20190614 |