CN110395741A - A kind of kaolin high-efficient deferrization technique - Google Patents
A kind of kaolin high-efficient deferrization technique Download PDFInfo
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- CN110395741A CN110395741A CN201910788660.3A CN201910788660A CN110395741A CN 110395741 A CN110395741 A CN 110395741A CN 201910788660 A CN201910788660 A CN 201910788660A CN 110395741 A CN110395741 A CN 110395741A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/40—Clays
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of kaolin high-efficient deferrization techniques, are related to kaolin production field, comprising the following steps: transport to store up in agitator tank by the ore pulp primary material after pulping and grit and starch, addition acid solution between 2.0~5.0, obtains pickling material to pH value；Pickling material is transported in hydrocyclone by pipeline and is classified, and before pickling material transports to hydrocyclone, cationic flocculant is continually fed into the pipeline of conveying pickling material, concentration of the cationic flocculant in pickling material is 4-8ppm, and pickling material obtains upper layer pickle liquor and the heavy slurry of lower layer's pickling after hydroclone classification；It is passed through clear water into the heavy slurry of lower layer's pickling, clear water is transported in hydrocyclone together with the heavy slurry of lower layer's pickling and is classified three times, obtains upper layer cleaning waste liquid and the heavy slurry of lower layer's cleaning；Being passed through alkaline solution in the heavy slurry of lower layer's cleaning into step 3 and being neutralized to pH is then to transport in filter press between 6 ~ 7.The present invention has the advantages that improve de-ironing efficiency, improves kaolinic production efficiency.
Description
Technical field
The present invention relates to kaolin production fields, more specifically, it relates to a kind of kaolin high-efficient deferrization technique.
Background technique
Kaolin is a kind of nonmetallic minerals, is a kind of clay and clay rock based on kaolinite race clay mineral, because
White and fine and smooth, also known as white clouds are native.
A kind of kaolin preparation method is disclosed in the Chinese invention patent that Authorization Notice No. is CN101798096B, is wrapped
It includes: mining impurity elimination, digging pineization kaolin mineral aggregate, and clay, sundries are just isolated, obtain base-material；Pulping and grit, by base-material system
Simultaneously desanding is starched, ore pulp primary material is obtained；Chemical bleaching, by ore pulp primary material transport in high-speed stirred tank store up starch, be added sulfuric acid solution and
The mass ratio of hydrogensulfite solution, sulfuric acid solution and ore pulp primary material is 0.3: 100~0.8: 100, and sodium dithionite is molten
The mass ratio of liquid and kaolin ore slurry initial material is 0.6: 100~1.0: 100, and adjusting mixed liquor pH value is 2.0~3.0, with 140~
The speed of 180r/min stirs 40~45 minutes, obtains ore pulp fine fodder；Ore pulp fine fodder is recycled washing dehydration, obtained by washing dehydration
Ore pulp is obtained to expect eventually；Dry powder processed, by ore pulp, material filter-press dehydration, acquisition kaolin filter cake will crush after kaolin filtration cakes torrefaction eventually
It collects, obtains kaolin finished product.
Existing kleit preparation method and substantially identical as above-mentioned preparation method, be required to by mining impurity elimination,
Chemical bleaching, washing dehydration, dry these steps of powder processed.And the purpose of kaolin chemical bleaching is to remove in existing step
The iron in kaolin is removed, principle is so that iron simple substance is become ferrous ion by adding acid solution, then pass through washing dehydration
Step removes ferrous ion.
And during the washing dehydration after iron simple substance becomes ferrous ion, need by kaolin ore slurry be sent into storage tank or
It is settled in stock chest, is taken out on upper layer with the clear liquid of ferrous ion after sedimentation, be then passed through clear water mixing and again again
Supernatant liquor is extracted in sedimentation out again, and iterative cycles can repeatedly guarantee that the amount of ferrous ion is reduced under standard volume.Herein
In the process, since kaolin sedimentation needs time for standing longer, and it is qualified to need could remove iron after settling repeatedly, therefore this
The de-ironing efficiency of kind method for removing iron is extremely low；And using after such method, ore pulp can occupy storage tank or storage during standing
Hopper long period, subsequent ore pulp also can not normally flow into storage tank or stock chest, reduce kaolinic production efficiency.
It is, therefore, desirable to provide a kind of new scheme solves the above problems.
Summary of the invention
In view of the deficienciess of the prior art, the purpose of the present invention one is to provide a kind of kaolin high-efficient deferrization technique,
It has the advantages that improve de-ironing efficiency, improves kaolinic production efficiency.
To achieve the above object, the present invention provides the following technical scheme that
A kind of kaolin high-efficient deferrization technique, comprising the following steps:
Step 1: the ore pulp primary material after pulping and grit being transported to store up in agitator tank and is starched, be added acid solution to pH value 2.0~
Between 5.0, pickling material is obtained；
Step 2: the pickling material being transported in hydrocyclone by pipeline and is classified, and transports to waterpower rotation in pickling material
Before flowing device, it is continually fed into cationic flocculant into the pipeline of conveying pickling material, cationic flocculant is dense in pickling material
Degree is 4-8ppm, and pickling material obtains upper layer pickle liquor and the heavy slurry of lower layer's pickling after hydroclone classification；
Step 3: being passed through clear water in the heavy slurry of Xiang Suoshu lower layer pickling, and clear water and the heavy slurry of lower layer's pickling are transported to hydraulic cyclone together
It is classified three times in device, obtains upper layer cleaning waste liquid and the heavy slurry of lower layer's cleaning；
Step 4: alkaline solution is passed through in the heavy slurry of lower layer cleaning into step 3 and is neutralized to pH=7, then transports to filters pressing
In machine.
By using above-mentioned technical proposal, ferrous ion colloid easy to form under alkaline condition, therefore in step 1
The pH of ore pulp primary material is controlled enable to most ferrous ion stable between 2.0~5.0 there are in ore pulp primary material,
It will not be hydrolyzed.
Cationic flocculant is then passed through into pickling material in step 2, cationic flocculant is to the suspension in pickling material
Particle (i.e. kaolin) has extremely strong flocculating setting effect, especially more shows it to the colloidal solution particle with negative electrical charge
Superiority, and ferrous ion has positive charge, therefore ferrous ion can keep dissolving in water.Subsequent pickling material is revolved by waterpower
Upper layer pickle liquor is separated with the heavy slurry of lower layer's pickling after stream device, and pickle liquor is useless with a large amount of ferrous ions at the middle and upper levels
Liquid, and the heavy slurry of lower layer's pickling is kaolin ore slurry, since ferrous ion is most of in the pickle liquor of upper layer, kaolin ore
The ferrous ion amount having in slurry greatly reduces.
The heavy slurry of lower layer's pickling is passed through the classification three times that clear water clean and pass through hydrocyclone in step 3, this
When ferrous ion be diluted to qualified amount completely.After then adjusting pH pressure filtration molding can be carried out in defeated pine to filter press.
In above process, ore pulp is without keeping static condition to precipitate kaolin, and the conveying that ore pulp can continue
To filter press, storage tank or stock chest will not be occupied for a long time, saves a large amount of sedimentation time, not only improve except iron is imitated
Rate, and improve kaolinic production efficiency.
Further preferably, hydrocyclone is transported to after cationic flocculant is added in the pickling material and in pickling material
Before interior, pickling material is transported in stirring pool and is stirred, obtain flocculation material, flocculation material transports to hydrocyclone internal classification.
By using above-mentioned technical proposal, pickling material for making clothes is stirred after cationic flocculant is added by stirring pool,
Cationic flocculant is adequately dispersed in pickling material, kaolinic flocculating effect is improved, and then improves waterpower rotation
The classification efficiency for flowing device, improves kaolinic yield.
Further preferably, the flocculation material flows through filter pipe before transporting to hydrocyclone, and the filter pipe includes
Interconnected upper lateral tube, vertical tube, lower transverse tubule, the upper lateral tube, vertical tube, lower transverse tubule are distributed at " Z " font, and the vertical tube is separate
All side walls of upper lateral tube offer mounting hole, and the vertical tube week side wall is removably connected with the filter cloth of covering mounting hole, under described
One end of transverse tube is connected to the hydrocyclone in step 2, and other end sustainable supply has clear water.
By using above-mentioned technical proposal, flocculation material can pass sequentially through upper lateral tube, vertical tube, lower cross when passing through filter pipe
Pipe, is finally delivered in the hydrocyclone in step 2 with clear water together, during flocculation material is by filter pipe, wadding
Water of the major part with ferrous ion in condensate can pass through filter cloth, and kaolin and small part water can fall into lower transverse tubule out of vertical tube
It is interior, while the clear water in lower transverse tubule drives kaolin and small part water to flow to hydrocyclone direction, dilutes in kaolin
Ferrous ion, improve de-ironing efficiency.
Further preferably, the knocking device for beaing filter cloth is provided with outside the vertical tube, the knocking device includes
The spring of lower transverse tubule outer wall is fixed in inclination, and the one end of the spring far from lower transverse tubule is fixed with towards filter cloth direction to be supported with filter cloth
The oscillating plate connect.
By using above-mentioned technical proposal, oscillating plate is connected to the outer wall of filter cloth, and flocculation material will push after beating on filter cloth
Oscillating plate, oscillating plate can vibrate under the action of the spring, so that oscillating plate vibrates together with filter cloth, so that in filter cloth
Kaolin be vibrated in sheer pole, cooperate scour without sediment motion, kaolin be not easy block vertical tube, improve flocculation material passing through filter
Stability when water pipe.
Further preferably, ore pulp primary material is transported to before transporting to the ore pulp primary material in step 1 in agitator tank
Iron is removed in magnetic separator.
By using above-mentioned technical proposal, magnetic separator is to be used in the screenings such as the removing iron powder recycled in powdery plastochondria to set
It is standby.Magnetic separator can remove the biggish iron of partial size, play the role of tentatively removing iron, improve de-ironing efficiency.
Further preferably, one of which of the cationic flocculant in alum or cationic polyacrylamide.
By using above-mentioned technical proposal, alum and cationic polyacrylamide are flocculating effects in cationic flocculant
Preferable material, alum and cationic polyacrylamide, which is added, can preferably improve flocculating effect, so that ferrous ion
It is separated with kaolin completely, improves kaolinic production efficiency.
Further preferably, the acid solution is by hydrogensulfite solution and sulfuric acid solution according to the quality of 1~2:1
Than compounding.
By using above-mentioned technical proposal, sodium dithionite has stronger reproducibility, can be in by iron oxide reduction
Iron ion, and sulfuric acid is easy to adjust the pH of ore pulp primary material, the two compounding can play synergistic effect.
In conclusion compared with prior art, the invention has the following advantages:
(1) by the way that ore pulp primary material is carried out pickling and adds cationic flocculant, the molecules such as kaolin can be agglomerated together,
After hydroclone classification, pickling solution and kaolin separation are then cleaned kaolin and are classified again, will be had
The kaolin of iron-content qualification can be obtained in the cleaning waste liquid of ferrous ion after removing, whole process can continue to carry out, be not necessarily to
The time for repeatedly settling and being cleaned multiple times is waited, kaolinic de-ironing efficiency is greatly improved；
(2) by setting filter pipe, kaolin is enabled to after filter pipe in flocculation stream and has the water of ferrous ion again
Secondary separation improves de-ironing efficiency；Knocking device is set, the kaolin being deposited in the vertical tube in filter pipe can be beaten,
Avoid drainage blockage；
(3) by the way that kaolin ore slurry is passed through in magnetic separator before kaolin pickling, magnetic separator can by partial size in kaolin compared with
Big iron removes, and improves the pickling efficiency of iron, and then improve kaolinic de-ironing efficiency.
Detailed description of the invention
Fig. 1 be the present invention in filter pipe in conjunction with knocking device after structural schematic diagram.
Appended drawing reference: 1, upper lateral tube；2, vertical tube；3, lower transverse tubule；4, filter cloth；5, knocking device；501, spring；502, it vibrates
Plate；503, limited post；6, water pipe.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
A kind of kaolin high-efficient deferrization technique, comprising the following steps:
Step 1: the ore pulp primary material after pulping and grit in the prior art is transported to store up in agitator tank and is starched, acid solution is added and adjusts
PH=3 obtains pickling material.Wherein, the weight ratio of kaolin and water is 1:4 in ore pulp primary material in this step；It is stirred in this step
Mixing speed in tank is 250r/min, and mixing time is 15 minutes；Acid solution in the present embodiment is sodium dithionite
The mass ratio of solution, hydrogensulfite solution and kaolin ore slurry initial material is 1.5:100.
Step 2: pickling material being transported in hydrocyclone by pipeline and is classified, and transports to waterpower rotation in pickling material
Before flowing device, it is continually fed into cationic flocculant into the pipeline of conveying pickling material, cationic flocculant is dense in pickling material
Degree is 4ppm, and pickling material obtains upper layer pickle liquor and the heavy slurry of lower layer's pickling after hydroclone classification.Wherein, this step
In cationic flocculant be alum, upper layer pickle liquor is the waste liquid with a large amount of ferrous ions, and the heavy slurry of lower layer's pickling is band
There is the kaolin ore slurry of a small amount of ferrous ion.
Step 3: being continually fed into clear water in the heavy slurry of lower layer's pickling into step 2, by clear water and the heavy slurry one of lower layer's pickling
It is classified three times with transporting in hydrocyclone, obtains upper layer cleaning waste liquid and the heavy slurry of lower layer's cleaning.Wherein in the present embodiment
Be classified as three times be successively classified by three concatenated hydrocyclones.
Step 4: alkaline solution is passed through in the heavy slurry of lower layer's cleaning into step 3 and is neutralized to pH=7, then transports to filters pressing
In machine.Wherein, the alkaline solution in the present embodiment is potassium hydroxide solution.
Embodiment 2: a kind of kaolin high-efficient deferrization technique, difference from example 1 is that, it is cationic in step 2
Concentration of the flocculant in pickling material is 8ppm.
Embodiment 3: a kind of kaolin high-efficient deferrization technique, difference from example 1 is that, sun is added in pickling material
After ionic flocculant and before pickling material is transported in hydrocyclone, pickling material is transported in stirring pool and is stirred, it is stirred
Cheng Yici includes: that stirring rate is 300r/min, mixing time 3min；Stirring rate is 100r/min, mixing time 5min；It stirs
Mixing rate is 30r/min, mixing time 5min.After above-mentioned whipping process, flocculation material is obtained, flocculation material is transported in step 2
Hydrocyclone in be classified.
Embodiment 4: referring to Fig.1, a kind of kaolin high-efficient deferrization technique, with embodiment 3 the difference is that, step 2
In flocculation material before transporting to hydrocyclone followed by three filter pipes.Filter pipe include interconnected upper lateral tube 1,
Vertical tube 2, lower transverse tubule 3, upper lateral tube 1, vertical tube 2, lower transverse tubule 3 are distributed at " Z " font, and upper lateral tube 1 is located at the top of lower transverse tubule 3, In
In actual mechanical process, the one end of upper lateral tube 1 far from vertical tube 2 is connected to the bottom end of the hydrocyclone of classification pickling material.
Lower transverse tubule 3 is extended close to one end of vertical tube 2 to the direction far from 3 other end of lower transverse tubule, and elongated end and clear
Water pipe 6 is connected to, and the water pipe 6 in the present embodiment is the pipeline for being persistently connected with clear water.In actual production, lower transverse tubule 3 is far from clear
One end of water pipe 6 is connected to the hydrocyclone in step 2.
Vertical tube 2 offers mounting hole (not shown) far from all side walls of upper lateral tube 1, and 2 weeks side walls of vertical tube are located at installation
The filter cloth of covering mounting hole is provided with outside hole, filter cloth is clamped on vertical tube 2 by clip (not shown), by opening clip
It can will realize the disassembly of filter cloth.
Flocculation material is by that can pass sequentially through upper lateral tube 1, vertical tube 2, lower transverse tubule 3 when filter pipe, and in the process, flocculation is expected
Can be by filter-cloth filtering, the flocculation material flowed into lower transverse tubule 3 can be with defeated in the hydrocyclone in the same direction of clear water one in water pipe 6
It send.
Embodiment 5: referring to Fig.1, a kind of kaolin high-efficient deferrization technique, with embodiment 4 the difference is that, vertical tube 2
It is provided with the knocking device 5 for beaing filter cloth outside, knocking device 5 includes the spring 501 that 3 outer wall of lower transverse tubule is fixed in inclination,
One end of spring 501 is plugged in 3 outer wall of lower transverse tubule, and the other end is in hanging setting and this end is extended towards filter cloth direction.
3 weeks side walls of lower transverse tubule have the limited post 503 coaxial with spring 501 towards spring 501 is projecting inward, and limited post 503 rises
To limit effect, the service life of spring 501 is improved.
Spring 501 is welded with oscillating plate 502 far from one end of lower transverse tubule 3, side of the oscillating plate 502 far from spring 501 with
Filter cloth outer wall abuts.There is gap, this gap is to spring between the one end of limited post 503 far from lower transverse tubule 3 and oscillating plate 502
501 provide elastic space.
Embodiment 6: a kind of kaolin high-efficient deferrization technique, with embodiment 5 the difference is that, will be in step 1
Ore pulp primary material is transported to the ore pulp primary material except iron in magnetic separator, after magnetic separator is except iron by ore pulp primary material before transporting in agitator tank
It is passed through in agitator tank again.
Embodiment 7: a kind of kaolin high-efficient deferrization technique, difference from example 1 is that, in step 2 sun from
Sub- flocculant is cationic-type polyacrylamide.
Embodiment 8: a kind of kaolin high-efficient deferrization technique, difference from example 1 is that, the acidity in step 1
Solution is compounded with sulfuric acid solution according to the mass ratio of 1:1 by hydrogensulfite solution, the acid solution in the present embodiment
Mass ratio with kaolin ore slurry initial material is 1.5:100.
Embodiment 9: a kind of kaolin high-efficient deferrization technique, the difference is that, acid solution is by even two with embodiment 8
Sodium sulfite solution is compounded with sulfuric acid solution according to the mass ratio of 2:1, the mass fraction of the sulfuric acid solution in the present embodiment
It is 75%.
Embodiment 10: a kind of kaolin high-efficient deferrization technique, with embodiment 9 the difference is that, the alkali in step 4
Property solution be sodium hydroxide solution.
Comparative example 1: a kind of kaolin preparation method, the Chinese invention patent for being CN101798096B according to patent announcement number
Embodiment 1 be made.
Comparative example 2: a kind of kaolinic efficient iron removal by magnetic separation technique is in CN103086390A according to patent publication No.
The embodiment 1 of state's patent of invention operates.
Test name: iron rate testing experiment sample is removed: using the kaolin filter cake obtained in Examples 1 to 10 as test
Sample 1~10, using the kaolin filter cake obtained in comparative example 1~2 as control sample 1~2.
Test method: the Fe of test experiments sample 1~10 and control sample 1~22O3Content.This test method and patent are public
The number of opening is Fe in the Chinese invention patent of CN103086390A2O3The test method of content is consistent.
Table 1 removes iron rate test result
Test result: as shown in Table 1, test specimen 1~10 removes iron rate 71.1%~82.5%, is superior to control sample 1
With control sample 2 except iron rate, illustrate that the kaolinic iron content produced through the invention can be less than according to Patent No.
The Chinese invention patent of CN103086390A kaolin produced.
It is found that it can be largely after filter pipe material will be flocculated according to test specimen 1~2 and test specimen 4~5
Raising it is kaolinic remove iron rate, illustrate filter pipe can by kaolin ore slurry have ferrous ion water filter.
According to test specimen 1~2 and test specimen 6 it is found that by the way that ore pulp primary material is delivered to magnetic separator before pickling
It is interior to the greatest extent to remove iron.
The present invention flocculates to kaolin by being passed through cationic flocculant into pickling material；Ferrous ion band simultaneously
There is positive charge, dissolved state in water can be kept.Kaolin ore slurry after multi-stage water power cyclone and three filter pipes,
Kaolin is separated with the ore pulp with ferrous ion, and then removes the iron in kaolin.In the process, ore pulp is without protecting
Holding static condition precipitates kaolin, and what ore pulp can continue is delivered in filter press, will not occupy storage tank or storage for a long time
Hopper saves a large amount of sedimentation time, not only improves de-ironing efficiency, but also improve kaolinic production efficiency.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of kaolin high-efficient deferrization technique, which comprises the following steps:
Step 1: the ore pulp primary material after pulping and grit being transported to store up in agitator tank and is starched, be added acid solution to pH value 2.0~
Between 5.0, pickling material is obtained；
Step 2: the pickling material being transported in hydrocyclone by pipeline and is classified, and transports to waterpower rotation in pickling material
Before flowing device, it is continually fed into cationic flocculant into the pipeline of conveying pickling material, cationic flocculant is dense in pickling material
Degree is 4-8ppm, and pickling material obtains upper layer pickle liquor and the heavy slurry of lower layer's pickling after hydroclone classification；
Step 3: being passed through clear water in the heavy slurry of Xiang Suoshu lower layer pickling, and clear water and the heavy slurry of lower layer's pickling are transported to hydraulic cyclone together
It is classified three times in device, obtains upper layer cleaning waste liquid and the heavy slurry of lower layer's cleaning；
Step 4: being passed through alkaline solution and be neutralized to pH and be between 6 ~ 7 in the heavy slurry of lower layer cleaning into step 3, then defeated
To filter press.
2. a kind of kaolin high-efficient deferrization technique according to claim 1, which is characterized in that sun is added in the pickling material
After ionic flocculant and before pickling material is transported in hydrocyclone, pickling material is transported in stirring pool and is stirred, is wadded a quilt with cotton
Condensate, flocculation material transport to hydrocyclone internal classification.
3. a kind of kaolin high-efficient deferrization technique according to claim 2, which is characterized in that the flocculation material is transporting to water
Filter pipe is flowed through before power cyclone, the filter pipe includes interconnected upper lateral tube (1), vertical tube (2), lower transverse tubule (3), institute
It states upper lateral tube (1), vertical tube (2), lower transverse tubule (3) to be distributed at " Z " font, the vertical tube (2) is opened far from all side walls of upper lateral tube (1)
Equipped with mounting hole, all side walls of the vertical tube (2) are removably connected with the filter cloth (4) of covering mounting hole, and the one of the lower transverse tubule (3)
End is connected to the hydrocyclone in step 2, and other end sustainable supply has clear water.
4. a kind of kaolin high-efficient deferrization technique according to claim 3, which is characterized in that the vertical tube (2) is arranged outside
There is the knocking device (5) for beaing filter cloth (4), the knocking device (5) includes the bullet that lower transverse tubule (3) outer wall is fixed in inclination
Spring (501), the spring (501) are fixed with towards filter cloth (4) direction far from the one end of lower transverse tubule (3) and abut with filter cloth (4)
Oscillating plate (502).
5. a kind of kaolin high-efficient deferrization technique according to claim 1, which is characterized in that will be described in step 1
Ore pulp primary material transports to ore pulp primary material in magnetic separator except iron before transporting in agitator tank.
6. a kind of kaolin high-efficient deferrization technique of preparation method according to claim 1, which is characterized in that it is described sun from
One of which of the sub- flocculant in alum or cationic-type polyacrylamide.
7. a kind of kaolin high-efficient deferrization technique according to claim 1, which is characterized in that the acid solution is by even two
Sodium sulfite solution is compounded with sulfuric acid solution according to the mass ratio of 1 ~ 2:1.
8. a kind of kaolin high-efficient deferrization technique according to claim 1, which is characterized in that the alkaline solution includes hydrogen
At least one of potassium oxide and sodium hydroxide solution.
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| CN114308241A (en) * | 2021-12-31 | 2022-04-12 | 漳州市龙华矿产有限公司 | Chemical iron removal method for kaolin |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114308241A (en) * | 2021-12-31 | 2022-04-12 | 漳州市龙华矿产有限公司 | Chemical iron removal method for kaolin |
| CN114308241B (en) * | 2021-12-31 | 2022-12-06 | 漳州市龙华矿产有限公司 | Chemical iron removal method for kaolin |
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Application publication date: 20191101 |