CN106348320B - A kind of high efficiency flame retardant of magnesium hydroxide wet preparation method - Google Patents
A kind of high efficiency flame retardant of magnesium hydroxide wet preparation method Download PDFInfo
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- CN106348320B CN106348320B CN201610770291.1A CN201610770291A CN106348320B CN 106348320 B CN106348320 B CN 106348320B CN 201610770291 A CN201610770291 A CN 201610770291A CN 106348320 B CN106348320 B CN 106348320B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/14—Magnesium hydroxide
- C01F5/145—Purification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/002—Inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K21/00—Fireproofing materials
- C09K21/02—Inorganic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/005—Dispersants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
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Abstract
The invention discloses a kind of high efficiency flame retardant of magnesium hydroxide wet preparation methods, it is related to wet dressing technical field.It is that raw material progress wet purification prepares flame retardant of magnesium hydroxide that it, which is using low-grade shepardite, and shepardite raw ore broken first is at rubble；Rubble is put into overflow ball mill and carries out wet milling, shepardite slurries are made；Shepardite slurries are purified by spiral sand removing machine and hydrocyclone desanding；The mixed iron micro mist impurity in ball milling is removed by high gradient magnetic separator, then adding medicine flotation is classified, and is further purified；After carrying out natural sedimentation drainage, press filtration, drying, ultra-fine grinding to the shepardite slurries after purification, the flame retardant of magnesium hydroxide of different-grain diameter is made.The present invention uses wet beneficiation craft so that and low-grade shepardite is purified, and the resource utilization of shepardite ore is substantially increased, meanwhile, in entire ore dressing process rationally using large-scale processing machinery, substantially increase beneficiating efficiency.
Description
Technical field
The present invention relates to wet dressing technical fields, and in particular to a kind of high efficiency flame retardant of magnesium hydroxide wet method preparation side
Method.
Background technology
There are many existing method for preparing flame retardant of magnesium hydroxide, mainly there is Physical and chemical method two ways, Physical
It is by being carried out made from physics deep processing to natural minerals shepardite, chemical method mainly utilizes chemical synthesis, that is, passes through
Using the raw materials such as the brine containing magnesium chloride, halogen mine with bases reacting in aqueous medium, chemical method mostly production process
Complexity, raw material are not easy to obtain, environment easy to pollute, are unacceptable from the point of view of commercial Application cost.
It is largely relied on it is known that carrying out Physical using shepardite mineral and preparing flame retardant of magnesium hydroxide
The grade of mineral itself, high-grade brucite mineral are utilized by preferential exploitation, but with the exhaustion of high-grade mineral resources, are remained
Those lower low-grade brucite minerals just need a new technique by it by beneficiation enrichment, and removal is mixed in quartz therein
Rock class mineral, to reach available value.Meanwhile the production efficiency of ore dressing is also taken into account, to reach industrially scalable.
Invention content
The object of the present invention is to provide a kind of high efficiency producing flame retardant of magnesium hydroxide using low-grade shepardite mineral
Wet preparation method.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of high efficiency flame retardant of magnesium hydroxide wet preparation method, the technique be using low-grade shepardite be raw material into
Row wet method prepares flame retardant of magnesium hydroxide, includes the following steps：
A., shepardite raw ore is directly broken into the shepardite rubble of a diameter of 5 ~ 10cm by crusher；
B. shepardite rubble obtained in step A is put into overflow ball mill, and is passed through clear water, ball mill is in water ring
By the cooperation of its internal cast steel ball and waveform liner plate under border, a series of shock is carried out to shepardite rubble, shearing, is crushed,
To which the shepardite slurries containing coarse sand be made；
C. the shepardite slurries obtained containing coarse sand in step B are passed through into spiral sand removing machine, utilizes the piece of shepardite ore particle
Shape suspendability removes contained coarse sand；
D. will be removed in step C the shepardite slurries of coarse sand by the hydrocyclone group that is cascaded from big to small according to
It is secondary be classified, desanding, purification, to be made shepardite purify liquid；
E. shepardite purification liquid obtained in step D is pumped into high gradient magnetic separator, it is mixed in ball milling to remove
Iron micro mist impurity；In order to avoid influencing the whiteness of mineral.
F. it will be pumped into the top floation tank in staged pond, add by except the shepardite purification liquid after iron in step E
Enter a certain amount of floating agent, the shepardite purification liquid separation on pond upper layer is drawn in stirring, static rear progress gravity floatation classification
Enter into the lower part settling tank in staged pond, obtain shepardite refined liquid, floation tank bottom is then mixed with bulky grain water
Magnesite ore particle and the shepardite of fine sand stone grain purification liquid are discharged by the pipeline of bottom of pond；
G., by carrying out centrifuge dewatering except the shepardite refined liquid after iron, shepardite wet feed will be obtained in step F；
H. after the shepardite wet feed obtained in step G being carried out expansion drying, ultra-fine grinding successively, different-grain diameter is made
Flame retardant of magnesium hydroxide.
Further, the floating agent includes sodium carbonate, calgon and waterglass, wherein calgon and water
Glass serves as dispersant, so that shepardite ore particle suspends in water according to itself radius-thickness ratio laminar dispersion；Sodium carbonate is for adjusting
The acid-base value for saving ore pulp, to improve the peptizaiton of dispersant.
Further, the pH value of the shepardite purification liquid is controlled 8 ~ 10.
Further, the dosage of the calgon controls 3 ‰ ~ 4 ‰ of the shepardite ore particle weight in floation tank.
Further, the dosage of the waterglass controls 4 ‰ ~ 5 ‰ of the shepardite ore particle weight in floation tank.
Further, the concentration of the shepardite purification liquid is controlled in 10% ~ 20% (mass fraction), if concentration is too low, no
Conducive to the promotion of yield, if excessive concentration, it is unfavorable for the effect of gravity floatation.
Further, the hydrocyclone group include 300,150,75,50 and 25 5 kind of specification (according to cylinder
Internal diameter divides, and unit is mm), according to sequence from big to small, the quantity of the hydrocyclone group of the latter specification is previous
2 times of the water conservancy cyclone group of specification are connected using the hydrocyclone group of this five kinds of specifications, and classification carries layer by layer from big to small
It is pure, be conducive to improve desanding effect, while the quantity of these cyclone groups is successively with 2 times of increased number, is to reach place
The balance of reason amount.
Further, the diameter of the hydrocyclone overflow port is 1.5 ~ 2 times of spigot diameter, can be improved in this way
The effect of desanding reduces the chance that thicker shepardite ore particle is excluded from spigot.
Further, the cast steel ball includes that 30,40,50 and 60 4 kind of specification (divide, unit according to sphere diameter
It is mm), the ratio of input is 1:1.5:1.5:1, cast steel ball mix and match different size of in this way is conducive to shepardite ore and exists
It is fully crushed in ball mill.
The beneficial effects of the present invention are：
The present invention uses wet beneficiation craft, technological process coherent so that and low-grade shepardite is purified, and to
Flame retardant of magnesium hydroxide is prepared, the resource utilization of shepardite ore is substantially increased, meanwhile, it is reasonable in entire ore dressing process
Using large size processing machinery, beneficiating efficiency is substantially increased.
Specific implementation mode
The specific embodiment of the invention uses following technical scheme：
Embodiment one：
A kind of high efficiency flame retardant of magnesium hydroxide wet preparation method, it is that raw material carries out wet method which, which is using shepardite,
Flame retardant of magnesium hydroxide is prepared, is included the following steps：
A., shepardite raw ore is directly broken into the shepardite rubble of a diameter of 5cm by crusher；
B. shepardite rubble obtained in step A is put into overflow ball mill, and is passed through clear water, ball mill is in water ring
By the cooperation of its internal cast steel ball and waveform liner plate under border, a series of shock is carried out to shepardite rubble, shearing, is crushed,
To which the shepardite slurries containing coarse sand be made；
C. the shepardite slurries obtained containing coarse sand in step B are passed through into spiral sand removing machine, utilizes the piece of shepardite ore particle
Shape suspendability removes contained coarse sand；
D. will be removed in step C the shepardite slurries of coarse sand by the hydrocyclone group that is cascaded from big to small according to
It is secondary be classified, desanding, purification, to be made shepardite purify liquid；Wherein, the hydrocyclone group include 300,150,
75,50 and 25 5 kind of specification (being divided according to cylinder internal diameter, unit is mm), according to sequence from big to small, the latter specification
The quantity of hydrocyclone group be 2 times of water conservancy cyclone group of previous specification；The hydrocyclone overflow port it is straight
Diameter is 1.5 times of spigot diameter；
E. shepardite purification liquid obtained in step D is pumped into high gradient magnetic separator, it is mixed in ball milling to remove
Iron micro mist impurity；
F. it will be pumped into the top floation tank in staged pond by except the shepardite purification liquid after iron in step E, water
Magnesite purifies the concentration control of liquid in 10% (mass fraction), and a certain amount of floating agent, stirring, static rear progress gravity is added
Flotation is classified, and the shepardite purification liquid separation on pond upper layer is introduced into the lower part settling tank in staged pond, water magnesium is obtained
Stone refined liquid, then shepardite purification liquid that floation tank bottom is mixed with to bulky grain shepardite ore particle and fine sand stone grain pass through pond
The pipeline at bottom is discharged；Wherein, the floating agent includes sodium carbonate, calgon and waterglass, wherein calgon and
Waterglass serves as dispersant, so that shepardite ore particle suspends in water according to itself radius-thickness ratio laminar dispersion；Sodium carbonate is used for
The acid-base value for adjusting ore pulp, to improve the peptizaiton of dispersant；The pH value of the shepardite purification liquid is controlled 8；Described six
The dosage of sodium metaphosphate controls 3 ‰ of the shepardite ore particle weight in floation tank；The dosage of the waterglass is controlled in floation tank
The 4 ‰ of middle shepardite ore particle weight；
G., by carrying out centrifuge dewatering except the shepardite refined liquid after iron, shepardite wet feed will be obtained in step F；
H. after the shepardite wet feed obtained in step G being carried out expansion drying, ultra-fine grinding successively, different-grain diameter is made
Flame retardant of magnesium hydroxide.
Embodiment two：
A kind of high efficiency flame retardant of magnesium hydroxide wet preparation method, it is that raw material carries out wet method which, which is using shepardite,
Flame retardant of magnesium hydroxide is prepared, is included the following steps：
A., shepardite raw ore is directly broken into the shepardite rubble of a diameter of 7.5cm by crusher；
B. shepardite rubble obtained in step A is put into overflow ball mill, and is passed through clear water, ball mill is in water ring
By the cooperation of its internal cast steel ball and waveform liner plate under border, a series of shock is carried out to shepardite rubble, shearing, is crushed,
To which the shepardite slurries containing coarse sand be made；
C. the shepardite slurries obtained containing coarse sand in step B are passed through into spiral sand removing machine, utilizes the piece of shepardite ore particle
Shape suspendability removes contained coarse sand；
D. will be removed in step C the shepardite slurries of coarse sand by the hydrocyclone group that is cascaded from big to small according to
It is secondary be classified, desanding, purification, to be made shepardite purify liquid；Wherein, the hydrocyclone group include 300,150,
75,50 and 25 5 kind of specification (being divided according to cylinder internal diameter, unit is mm), according to sequence from big to small, the latter specification
The quantity of hydrocyclone group be 2 times of water conservancy cyclone group of previous specification；The hydrocyclone overflow port it is straight
Diameter is 1.75 times of spigot diameter；
E. shepardite purification liquid obtained in step D is pumped into high gradient magnetic separator, it is mixed in ball milling to remove
Iron micro mist impurity；
F. it will be pumped into the top floation tank in staged pond by except the shepardite purification liquid after iron in step E, water
Magnesite purifies the concentration control of liquid in 15% (mass fraction), and a certain amount of floating agent, stirring, static rear progress gravity is added
Flotation is classified, and the shepardite purification liquid separation on pond upper layer is introduced into the lower part settling tank in staged pond, water magnesium is obtained
Stone refined liquid, then shepardite purification liquid that floation tank bottom is mixed with to bulky grain shepardite ore particle and fine sand stone grain pass through pond
The pipeline at bottom is discharged；Wherein, the floating agent includes sodium carbonate, calgon and waterglass, wherein calgon and
Waterglass serves as dispersant, so that shepardite ore particle suspends in water according to itself radius-thickness ratio laminar dispersion；Sodium carbonate is used for
The acid-base value for adjusting ore pulp, to improve the peptizaiton of dispersant；The pH value of the shepardite purification liquid is controlled 9；Described six
The dosage of sodium metaphosphate controls 3.5 ‰ of the shepardite ore particle weight in floation tank；The dosage of the waterglass is controlled in flotation
The 4.5 ‰ of shepardite ore particle weight in pond；
G., by carrying out centrifuge dewatering except the shepardite refined liquid after iron, shepardite wet feed will be obtained in step F；
H. after the shepardite wet feed obtained in step G being carried out expansion drying, ultra-fine grinding successively, different-grain diameter is made
Flame retardant of magnesium hydroxide.
Embodiment three：
A kind of high efficiency flame retardant of magnesium hydroxide wet preparation method, it is that raw material carries out wet method which, which is using shepardite,
Flame retardant of magnesium hydroxide is prepared, is included the following steps：
A., shepardite raw ore is directly broken into the shepardite rubble of a diameter of 10cm by crusher；
B. shepardite rubble obtained in step A is put into overflow ball mill, and is passed through clear water, ball mill is in water ring
By the cooperation of its internal cast steel ball and waveform liner plate under border, a series of shock is carried out to shepardite rubble, shearing, is crushed,
To which the shepardite slurries containing coarse sand be made；
C. the shepardite slurries obtained containing coarse sand in step B are passed through into spiral sand removing machine, utilizes the piece of shepardite ore particle
Shape suspendability removes contained coarse sand；
D. will be removed in step C the shepardite slurries of coarse sand by the hydrocyclone group that is cascaded from big to small according to
It is secondary be classified, desanding, purification, to be made shepardite purify liquid；Wherein, the hydrocyclone group include 300,150,
75,50 and 25 5 kind of specification (being divided according to cylinder internal diameter, unit is mm), according to sequence from big to small, the latter specification
The quantity of hydrocyclone group be 2 times of water conservancy cyclone group of previous specification；The hydrocyclone overflow port it is straight
Diameter is 2 times of spigot diameter；
E. shepardite purification liquid obtained in step D is pumped into high gradient magnetic separator, it is mixed in ball milling to remove
Iron micro mist impurity；
F. it will be pumped into the top floation tank in staged pond by except the shepardite purification liquid after iron in step E, water
Magnesite purifies the concentration control of liquid in 20% (mass fraction), and a certain amount of floating agent, stirring, static rear progress gravity is added
Flotation is classified, and the shepardite purification liquid separation on pond upper layer is introduced into the lower part settling tank in staged pond, water magnesium is obtained
Stone refined liquid, then shepardite purification liquid that floation tank bottom is mixed with to bulky grain shepardite ore particle and fine sand stone grain pass through pond
The pipeline at bottom is discharged；Wherein, the floating agent includes sodium carbonate, calgon and waterglass, wherein calgon and
Waterglass serves as dispersant, so that shepardite ore particle suspends in water according to itself radius-thickness ratio laminar dispersion；Sodium carbonate is used for
The acid-base value for adjusting ore pulp, to improve the peptizaiton of dispersant；The pH value of the shepardite purification liquid is controlled 10；Described six
The dosage of sodium metaphosphate controls 4 ‰ of the shepardite ore particle weight in floation tank；The dosage of the waterglass is controlled in floation tank
The 5 ‰ of middle shepardite ore particle weight；
G., by carrying out centrifuge dewatering except the shepardite refined liquid after iron, shepardite wet feed will be obtained in step F；
H. after the shepardite wet feed obtained in step G being carried out expansion drying, ultra-fine grinding successively, different-grain diameter is made
Flame retardant of magnesium hydroxide.
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 (5)
1. a kind of high efficiency flame retardant of magnesium hydroxide wet preparation method, which is characterized in that this method is to utilize low-grade water magnesium
Stone is that raw material progress wet method prepares flame retardant of magnesium hydroxide, is included the following steps：
A., shepardite raw ore is directly broken into the shepardite rubble of a diameter of 5 ~ 10cm by crusher；
B. shepardite rubble obtained in step A is put into overflow ball mill, and is passed through clear water, ball mill is under water environment
By the cooperation of its internal cast steel ball and waveform liner plate, a series of shock is carried out to shepardite rubble, shearing, is crushed, to
The shepardite slurries containing coarse sand are made；
C. the shepardite slurries obtained containing coarse sand in step B are passed through into spiral sand removing machine, it can using the sheet of shepardite ore particle
Suspension removes contained coarse sand；
D. will be removed in step C the shepardite slurries of coarse sand by the hydrocyclone group that is cascaded from big to small successively into
Row classification, desanding, purification purify liquid to which shepardite be made；
E. shepardite purification liquid obtained in step D is pumped into high gradient magnetic separator, it is micro- to remove the mixed iron in ball milling
Powder impurity；
F. it will be pumped into the top floation tank in staged pond by except the shepardite purification liquid after iron in step E, be added one
The shepardite purification liquid separation on pond upper layer is introduced by quantitative floating agent, stirring, static rear progress gravity floatation classification
In the lower part settling tank in staged pond, shepardite refined liquid is obtained, floation tank bottom is then mixed with bulky grain shepardite
Ore particle and the shepardite of fine sand stone grain purification liquid are discharged by the pipeline of bottom of pond；
G., by carrying out centrifuge dewatering except the shepardite purification liquid after iron, shepardite wet feed will be obtained in step F；
H. after the shepardite wet feed obtained in step G being carried out expansion drying, ultra-fine grinding successively, the hydrogen-oxygen of different-grain diameter is made
Change magnesium fire retardant,
The floating agent includes sodium carbonate, calgon and waterglass, and wherein calgon and waterglass serves as dispersion
Agent, so that shepardite ore particle suspends in water according to itself radius-thickness ratio laminar dispersion；Sodium carbonate is used to adjust the soda acid of ore pulp
Degree, to improve the peptizaiton of dispersant；The pH value of the shepardite purification liquid is controlled 8 ~ 10；The use of the calgon
Amount controls 3 ‰ ~ 4 ‰ of the shepardite ore particle weight in floation tank；The dosage of the waterglass controls the shepardite in floation tank
The 4 ‰ of ore particle weight ~ 5 ‰.
2. high efficiency flame retardant of magnesium hydroxide wet preparation method according to claim 1, which is characterized in that the water magnesium
The concentration that stone purifies liquid controls mass fraction 10% ~ 20%.
3. high efficiency flame retardant of magnesium hydroxide wet preparation method according to claim 1, which is characterized in that the waterpower
Cyclone group includes five kinds of specifications of 300mm, 150mm, 75mm, 50mm and 25mm according to cylinder internal diameter division, according to from big
To small sequence, the quantity of the hydrocyclone group of the latter specification is 2 times of the water conservancy cyclone group of previous specification.
4. wanting the high efficiency flame retardant of magnesium hydroxide wet preparation method described in 3 according to right, which is characterized in that the waterpower rotation
The diameter of stream device overflow port is 1.5 ~ 2 times of spigot diameter.
5. high efficiency flame retardant of magnesium hydroxide wet preparation method according to claim 1, which is characterized in that the cast steel
Ball includes tetra- kinds of specifications of 30mm, 40mm, 50mm and 60mm according to sphere diameter division, and the ratio of input is 1:1.5:1.5:
1。
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| CN108672092A (en) * | 2018-05-16 | 2018-10-19 | 东北大学 | The process for effectively purifying of the low grade shepardite of high-silicon high calcium high ferro |
| CN109626402A (en) * | 2019-01-28 | 2019-04-16 | 包头钢铁（集团）有限责任公司 | The purification process of magnesium oxide product and the preparation method of magnesia |
| CN113318866B (en) * | 2021-06-01 | 2023-02-10 | 合肥皖燃新材料科技有限公司 | Aeration type flotation machine for processing high-white superfine magnesium hydroxide fire retardant by physical method |
| CN113980490A (en) * | 2021-11-16 | 2022-01-28 | 江西广源化工有限责任公司 | Magnesium hydroxide with high specific surface area, and preparation method and application thereof |
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| CN101214968A (en) * | 2007-12-28 | 2008-07-09 | 河北工业大学 | Method for purifying and processing attapulgite clay mineral |
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