CN108097470B - A kind of separation method of calcite and magnesite - Google Patents
A kind of separation method of calcite and magnesite Download PDFInfo
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- CN108097470B CN108097470B CN201711443278.6A CN201711443278A CN108097470B CN 108097470 B CN108097470 B CN 108097470B CN 201711443278 A CN201711443278 A CN 201711443278A CN 108097470 B CN108097470 B CN 108097470B
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- magnesite
- calcite
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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
- B03D1/02—Froth-flotation processes
Abstract
The present invention provides the separation methods of a kind of calcite and magnesite, its pretreatment process for sorting, the magnesite rough concentrate pulp density containing calcite is first adjusted to 30 ~ 50wt%, dispersing agent is added, stirring added sulfuric acid solution after 2 minutes, pH value is adjusted to 1~3, is separated by solid-liquid separation after stirring at low speed 20 ~ 60s；Solid after separation is added in the polyvinyl alcohol water solution of 2~5wt%, makes 10~30wt% of pulp density, sulfuric acid solution, adjusting pH value to 1~5 is added in stirring after 2 minutes, then obtains magnesite concentrate after conventional flotation.Method of the invention reduces the dosage of collecting agent and foaming agent, and has obtained the magnesite concentrate of high-purity.
Description
Technical field
The invention belongs to separation technology fields, and in particular to a kind of separation method of calcite and magnesite.
Background technique
Magnesite is one of China's Dominant Mineral Resources, and 3,000,000,000 t of proven reserve accounts for about the 1/4 of world's proved reserves, is occupied
First of the world.Resource focuses primarily upon South Liaoning, and reserves account for about the 86% of the total proved reserves in China up to 25.8 hundred million t.Magnesite
It is a kind of carbonic acid magnesium mineral of great industrial value, due to fire resistance with higher, cohesiveness and other excellent physicochemical characteristics
It is widely used in the fields such as metallurgy, building materials, chemical industry, light industry, agriculture and animal husbandry and magnesium metal refinement.No matter quantitatively magnesite resource
Or all there is advantageous advantage in quality, established solid material base for China's magnesium salts industrial expansion.
In recent years, with the continuous progress of science and technology, every profession and trade is also higher and higher to the quality requirement of concentrate, reduces magnesite
The content of middle calcite, the concentrate grade for improving magnesite can effectively improve the benefit of downstream industry.Floatation is to divide at present
Main method from magnesite and calcite, but sorting index is undesirable always, this is mainly due to mineral hydrophily is stronger, table
Face hydration shell is thicker, and the two crystal structure and surface nature are close, floatability difference very little, the selectivity of conventional collecting agent
It is poor.
Consolidate traditional froth flotation mainly increases purpose mine by the way that collecting agent is added in air-water-three phase boundary
The hydrophobic difference of object and gangue mineral, hydrophobic ore particle adhere to bubble floating, and hydrophilic ore particle stays Yu Shuizhong.But the mineralising of bubble needs
Bubble is wanted to collide with ore particle, the two breaks through the potential barrier of hydration shell during, causes hydration shell to rupture to form two and connect
Ore particle can be just firmly adsorbed on bubble when touching, this just increases the difficulty that target minreal is adsorbed on bubble.Conventional flotation
The generation of middle bubble mostlys come from flotation device mechanical stirring and external inflation, its main feature is that aeration quantity is big, but generates in this way
Bubble to the poor selectivity of target minreal.For these reasons, the present invention develops the new calcite and magnesite of one kind
Separation method.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to the separation method of a kind of calcite and magnesite is provided,
It can effectively solve the problems, such as that current calcite and magnesite are difficult to separate, and improve the concentrate grade of magnesite.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of separation method of calcite and magnesite comprising following steps:
1) pulp density of the magnesite rough concentrate containing calcite is adjusted to 30 ~ 50wt%, and dispersing agent is then added, stirs
It mixes 2 minutes；
2) sulfuric acid solution that concentration is 15~25wt% is added into the ore pulp of step 1), adjusts pH value to 1~3, stirs 20
After ~ 60s, it is separated by solid-liquid separation；
3) by solid portion be added to concentration be 2~5wt% polyvinyl alcohol water solution in, make pulp density 10~
30wt% is stirred 2 minutes；
4) sulfuric acid solution that addition concentration is 15~25wt% into the ore pulp of step 3), adjusting pH value to 1~5, then often
Magnesite concentrate is obtained after advising flotation.
The granularity of magnesite rough concentrate described in step 1) containing calcite is 0.1~5mm.
The pulp density of magnesite rough concentrate in step 1) containing calcite is to 25 ~ 45wt%.
Dispersing agent described in step 1) includes waterglass.
It is 1 ~ 2 that slurry pH is adjusted in step 2.
The speed of step 3) stirring is 1000~1500r/min.
It is 2 ~ 5 that slurry pH is adjusted in step 4).
Remarkable advantage of the invention is:
1) present invention adds sulfuric acid first, calcite with can be in Surface Creation gypsum, when gypsum is tired in sour reaction process
Meter will obstruct hydrogen ion afterwards to a certain extent, and the reaction was continued with Calcite Surface, and magnesite surface not will form covering, can
To continue to react with acid.Then rough concentrate is coated using polyvinyl alcohol, the reaction was continued for the magnesite after cladding and acid, can make water chestnut
The carbon dioxide bubble that magnesium mine surface is formed is stablized in mineral surfaces, forms gas-solid association, foam and magnesite one are opened at this time
Begin exactly two to be in contact, does not have to consider bubble and ore particle collision problem, also there is no the situations for overcoming hydration shell.And the cover has stone
The Calcite Surface of cream no longer generates bubble, this makes smithsonite become unique mineral for carrying microvesicle, to realize selective
Sort；
2) the method for the present invention can greatly reduce the dosage of collecting agent and foaming agent, obtain the magnesite concentrate of high-purity.
Specific embodiment
In order to make content of the present invention easily facilitate understanding, With reference to embodiment to of the present invention
Technical solution is described further, but the present invention is not limited only to this.
Embodiment 1
Flotation is carried out to the magnesite rough concentrate (granularity is 0.1~1.5 mm) containing calcite, passes through the following steps:
Magnesite rough concentrate is adjusted into pulp density to 40wt%；Dispersing agent waterglass 300g/t is added, stirs 2 minutes；Again
The sulfuric acid solution that concentration is 15wt% is added, adjusts pH value to 1, is separated by solid-liquid separation after stirring 30s；Solid after separation is added to
In the polyvinyl alcohol water solution of 3wt%, making pulp density 30wt%, sulfuric acid solution is added after 2 minutes in stirring (1000 r/min),
PH value is adjusted to 1, then after conventional flotation magnesite concentrate.
The grade of gained magnesite concentrate reaches 47.5%, and the rate of recovery compares close to 91% with conventional flotation results,
Grade improves 1% or so, and the rate of recovery improves nearly 20%.
Embodiment 2
Flotation is carried out to the magnesite rough concentrate (granularity is 1~2 mm) containing calcite, passes through the following steps:
Magnesite rough concentrate is adjusted into pulp density to 30wt%；Dispersing agent waterglass 300g/t is added, stirs 2 minutes；Again
The sulfuric acid solution that concentration is 25wt% is added, adjusts pH value to 2, is separated by solid-liquid separation after stirring 50s；Solid after separation is added to
In the polyvinyl alcohol water solution of 4wt%, making pulp density 20wt%, sulfuric acid solution is added after 2 minutes in stirring (1200 r/min),
PH value is adjusted to 2, then after conventional flotation magnesite concentrate.
The grade of gained magnesite concentrate reaches 47.6%, and the rate of recovery compares close to 95% with conventional flotation results,
Grade improves 1% or so, and the rate of recovery improves nearly 25%.
Embodiment 3
Flotation is carried out to the magnesite rough concentrate (granularity is 2~3 mm) containing calcite, passes through the following steps:
Magnesite rough concentrate is adjusted into pulp density to 50wt%；Dispersing agent waterglass 300g/t is added, stirs 2 minutes；Again
The sulfuric acid solution that concentration is 25wt% is added, adjusts pH value to 3, is separated by solid-liquid separation after stirring 60s；Solid after separation is added to
In the polyvinyl alcohol water solution of 5wt%, making pulp density 30wt%, sulfuric acid solution is added after 2 minutes in stirring (1400 r/min),
PH value is adjusted to 4, then after conventional flotation magnesite concentrate.
The grade of gained magnesite concentrate reaches 47.7%, and the rate of recovery compares close to 96% with conventional flotation results,
Grade improves 1% or so, and the rate of recovery improves nearly 25%.
Embodiment 4
Flotation is carried out to the magnesite rough concentrate (granularity is 3~5 mm) containing calcite, passes through the following steps:
Magnesite rough concentrate is adjusted into pulp density to 40wt%；Dispersing agent waterglass 300g/t is added, stirs 2 minutes；Again
The sulfuric acid solution that concentration is 25wt% is added, adjusts pH value to 1, is separated by solid-liquid separation after stirring 60s；Solid after separation is added to
In the polyvinyl alcohol water solution of 5wt%, making pulp density 10wt%, sulfuric acid solution is added after 2 minutes in stirring (1500 r/min),
PH value is adjusted to 5, then after conventional flotation magnesite concentrate.
The grade of gained magnesite concentrate reaches 47.5%, and the rate of recovery compares close to 96% with conventional flotation results,
Grade improves 1% or so, and the rate of recovery improves nearly 25%.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (4)
1. the separation method of a kind of calcite and magnesite, characterized by the following steps:
1) pulp density of the magnesite rough concentrate containing calcite is adjusted to 30 ~ 50wt%, and dispersing agent is then added, stirs 2 points
Clock；
2) sulfuric acid solution that concentration is 15~25wt% is added into the ore pulp of step 1), adjusts pH value to 1~3, stirs 20 ~ 60s
Afterwards, it is separated by solid-liquid separation；
3) solid portion is added in the polyvinyl alcohol water solution that concentration is 2~5wt%, makes 10~30wt% of pulp density,
Stirring 2 minutes；
4) sulfuric acid solution that concentration is 15~25wt%, adjusting pH value to 1~5 are added into the ore pulp of step 3), then is floated through conventional
Magnesite concentrate is obtained after choosing；
The granularity of magnesite rough concentrate described in step 1) containing calcite is 0.1~5mm；
The speed of step 3) stirring is 1000~1500r/min.
2. the separation method of calcite according to claim 1 and magnesite, it is characterised in that: adjust and contain in step 1)
The pulp density of the magnesite rough concentrate of calcite is to 40 ~ 45wt%.
3. the separation method of calcite according to claim 1 and magnesite, it is characterised in that: adjust ore pulp in step 2
PH value is 1 ~ 2.
4. the separation method of calcite according to claim 1 and magnesite, it is characterised in that: adjust ore pulp in step 4)
PH value is 2 ~ 5.
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| CN201711443278.6A CN108097470B (en) | 2017-12-27 | 2017-12-27 | A kind of separation method of calcite and magnesite |
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| CN201711443278.6A CN108097470B (en) | 2017-12-27 | 2017-12-27 | A kind of separation method of calcite and magnesite |
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| CN108097470A CN108097470A (en) | 2018-06-01 |
| CN108097470B true CN108097470B (en) | 2019-09-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110575911A (en) * | 2019-10-22 | 2019-12-17 | 湖北富邦新材料有限公司 | High-calcium magnesite flotation collector |
| CN112474026A (en) * | 2020-11-16 | 2021-03-12 | 福州大学 | Magnesite acid triggering-spiral chute preselecting method |
| CN112474025A (en) * | 2020-11-16 | 2021-03-12 | 福州大学 | Calcite acid triggering-hydraulic flotation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1632499A1 (en) * | 1989-01-18 | 1991-03-07 | Научно-Исследовательский И Проектный Институт Обогащения И Механической Обработки Полезных Ископаемых "Уралмеханобр" | Method flotation of magnesite ores |
| CN102284372A (en) * | 2011-07-26 | 2011-12-21 | 昆明理工大学 | Flotation method for carbonate minerals |
| CN103071580A (en) * | 2013-01-30 | 2013-05-01 | 昆明理工大学 | Method for removing magnesium from phosphate ore |
| CN104437819A (en) * | 2014-11-04 | 2015-03-25 | 中蓝连海设计研究院 | Turbid liquid and method for improving efficiency of reverse flotation of carbonate from phosphorus |
| CN106111350A (en) * | 2016-06-30 | 2016-11-16 | 福州大学 | A kind of method for floating of zinc oxide ore |
-
2017
- 2017-12-27 CN CN201711443278.6A patent/CN108097470B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1632499A1 (en) * | 1989-01-18 | 1991-03-07 | Научно-Исследовательский И Проектный Институт Обогащения И Механической Обработки Полезных Ископаемых "Уралмеханобр" | Method flotation of magnesite ores |
| CN102284372A (en) * | 2011-07-26 | 2011-12-21 | 昆明理工大学 | Flotation method for carbonate minerals |
| CN103071580A (en) * | 2013-01-30 | 2013-05-01 | 昆明理工大学 | Method for removing magnesium from phosphate ore |
| CN104437819A (en) * | 2014-11-04 | 2015-03-25 | 中蓝连海设计研究院 | Turbid liquid and method for improving efficiency of reverse flotation of carbonate from phosphorus |
| CN106111350A (en) * | 2016-06-30 | 2016-11-16 | 福州大学 | A kind of method for floating of zinc oxide ore |
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