CN109626398A - A kind of method of essence potassium slurry concentration dehalogenation - Google Patents
A kind of method of essence potassium slurry concentration dehalogenation Download PDFInfo
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- CN109626398A CN109626398A CN201910116250.4A CN201910116250A CN109626398A CN 109626398 A CN109626398 A CN 109626398A CN 201910116250 A CN201910116250 A CN 201910116250A CN 109626398 A CN109626398 A CN 109626398A
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- potassium
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/14—Purification
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/08—Preparation by working up natural or industrial salt mixtures or siliceous minerals
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
A kind of method that the present invention discloses smart potassium slurry concentration dehalogenation, comprising the following steps: washed Step 1: thick potassium is delivered to washing tank, obtain smart potassium slurry；Step 2: smart potassium slurry pipeline transport to the concentrator is concentrated, concentration underflow is obtained；Step 3: being separated by solid-liquid separation to the concentration underflow, solid phase and filtrate are obtained, obtains potassium chloride after the solid phase is dry.The present invention washs thick potassium to obtain smart potassium slurry, then smart potassium slurry is concentrated, and improves its concentration, is then separated by solid-liquid separation, and separation of solid and liquid is effectively reduced wears filter rate, avoids small particles material inefficient cycle in systems, reduces produce load, improves production yields.
Description
Technical field
The present invention relates to technical field of inorganic salt production, and in particular to a kind of method of essence potassium slurry concentration dehalogenation.
Background technique
Qinghai is the big province of resource, and natural resources is many kinds of, wherein representative resource is salt lake resources, and in salt lake resources
Mainly there are deposition resource and Brine resources, salt lake bittern to belong to liquid chloride mineral resources, is rich in various ingredients, salt lake bittern
Using the carnallite of rich content, potassium chloride can be made in processing, and for producing potash fertilizer, potash fertilizer is nitrogen, the big chemistry fertilizer of phosphorus potassium three
One of material, potassium element act on the life process adjusted in plant the absorption shape for being significantly conducive to improve plant internal water
The synthesis and transfer of condition, carbohydrate, the yield and quality of crops can be effectively improved using potash fertilizer.
Technique using the carnallite production potassium chloride in salt lake bittern has very much, mainly including direct floatation process and instead
Floatation process.The process flow of direct flotation are as follows: carnallite decomposition and crystallization obtains thick potassium slurry, thick potassium slurry by direct flotation,
Dehalogenation obtains thick potassium, obtains smart potassium slurry after thick potassium washing, smart potassium slurry obtains smart potassium, the technique stream of reverse flotation through dehalogenation again
Journey are as follows: carnallite ore pulp reverse flotation obtains low-sodium carnalite slurry, and low-sodium carnalite slurry obtains thick potassium through dehalogenation, decomposition and crystallization
Slurry, thick potassium slurry obtain thick potassium by dehalogenation, obtain smart potassium slurry after thick potassium washing, smart potassium slurry obtains essence through dehalogenation again
Potassium.
The method of mesh first two production potassium chloride includes the process of smart potassium slurry dehalogenation, the equipment for being commonly used in dehalogenation
For centrifuge, although centrifuge separation, so that the water capacity of material is low, the sieve of centrifuge wears that filter rate is larger, and smart potassium is easy damage
It loses, in order to recycle the solid phase essence potassium worn in filtrate, is often furnished with concentrator, the bottom of concentrator after centrifuge in process flow
It flows slurry and returns to thick potassium washing procedure, wear filter solid phase for recycling this part.
In order to guarantee good washing effect, the concentration into the smart potassium slurry of centrifuge dehalogenation is generally lower, cause from
Scheming wears that filter rate is excessive, and maximum wears filter rate up to 40% or so, wears the little particle potassium chloride filtered out and follows in vain in systems always
Ring not only increases produce load, but also increases production cost, and a large amount of material wears filter and causes centrifuge sieve erosive wear tight
Weight, screen life-span is short, and it is higher to wear filter rate.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of smart potassium slurry concentration dehalogenation, for solving existing smart potassium slurry
Excessive filter rate is worn when dehalogenation, little particle potassium chloride inefficient cycle, influences the problem of production.
To achieve the goals above, the invention provides the following technical scheme: it is a kind of essence potassium slurry concentration dehalogenation method,
In, comprising the following steps:
It is washed Step 1: thick potassium is delivered to washing tank, obtains smart potassium slurry；
Step 2: smart potassium slurry pipeline transport to the concentrator is concentrated, concentration underflow is obtained；
Step 3: being separated by solid-liquid separation to the concentration underflow, solid phase and filtrate are obtained, obtains chlorine after the solid phase is dry
Change potassium.
Preferably, filtrate cycle described in step 3 is to the washing tank to recycle.
Preferably, the step 3 further include:
The concentration underflow is sieved, oversize and screenings are obtained；
The oversize is separated by solid-liquid separation, oversize solid phase and oversize filtrate are obtained, the oversize solid phase is dry
Potassium chloride is obtained after dry.
Preferably, the concentration of the oversize is 60%~80%.
Preferably, the screenings is separated by solid-liquid separation, obtains screenings filtrate and screenings solid phase, the screenings
Potassium chloride is obtained after solid phase is dry.
Preferably, the screenings filtrate cycle is to the washing tank to recycle.
Preferably, overflowing liquid is obtained when the concentrator is concentrated, the overflowing liquid is for preparing decomposition nut liquid.
Compared with the prior art, the method for smart potassium slurry concentration dehalogenation provided by the invention has the advantage that
The present invention washs thick potassium to obtain smart potassium slurry, then smart potassium slurry is concentrated, and improves its concentration, then carries out
It is separated by solid-liquid separation, separation of solid and liquid is effectively reduced wears filter rate, avoids small particles material inefficient cycle in systems, and it is negative to reduce production
Lotus improves production yields.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.In the accompanying drawings:
Fig. 1 is the process flow that the method for dehalogenation is concentrated in a kind of smart potassium slurry of preferred embodiment provided by the invention
Figure；
Fig. 2 is the process flow that the method for dehalogenation is concentrated in the smart potassium slurry of another preferred embodiment provided by the invention
Figure.
Specific embodiment
The present invention provides many applicable creative concepts, which be can be reflected in a large number of on specific
Hereinafter.The specific embodiment described in following embodiments of the present invention is only used as a specific embodiment of the invention
Exemplary illustration, and be not meant to limit the scope of the invention.
The invention will be further described with specific embodiment with reference to the accompanying drawing.
The present invention provides a kind of method of smart potassium slurry concentration dehalogenation, for direct floatation process in producing potash fertilizer or anti-floating
The thick potassium washing for selecting technique to obtain is smart potassium slurry, carries out concentration dehalogenation, produces potassium chloride.
As shown in FIG. 1, FIG. 1 is a kind of methods of the smart potassium slurry of preferred embodiment provided by the invention concentration dehalogenation
Process flow chart.It is described essence potassium slurry concentration dehalogenation method the following steps are included:
It is washed Step 1: thick potassium is delivered to washing tank, obtains smart potassium slurry；
Step 2: smart potassium slurry pipeline transport to the concentrator is concentrated, concentration underflow is obtained；
Step 3: being separated by solid-liquid separation to the concentration underflow, solid phase and filtrate are obtained, obtains chlorine after the solid phase is dry
Change potassium.
The present invention washs thick potassium to obtain smart potassium slurry, then smart potassium slurry is concentrated, and improves its concentration, then carries out
It is separated by solid-liquid separation, separation of solid and liquid is effectively reduced wears filter rate, avoids small particles material inefficient cycle in systems, and it is negative to reduce production
Lotus improves production yields.
As shown in Fig. 2, the method that dehalogenation is concentrated in the smart potassium slurry that Fig. 2 is another preferred embodiment provided by the invention
Process flow chart.It is described essence potassium slurry concentration dehalogenation method the following steps are included:
It is washed Step 1: thick potassium is delivered to washing tank, obtains smart potassium slurry.
The thick potassium is the thick potassium containing potassium chloride obtained in potash fertilizer production by direct floatation process or reverse floatation process
Product, water capacity < 8%.
The washing process are as follows: the thick potassium is delivered to washing tank, fresh water is added and carries out plasm scouring again, the essence potassium material
The mass concentration of solid phase is 30~40% in slurry.
Step 2: smart potassium slurry pipeline transport to the concentrator is concentrated, concentration underflow is obtained.
Further, overflowing liquid is also obtained when the concentrator is concentrated, the overflowing liquid is improved for preparing decomposition nut liquid
The utilization rate of the overflowing liquid, avoids the overflowing liquid direct emission, and solid-phase material therein is wasted.
The concentrator is concentrated using the gravitational settling of solid phase particles in the smart potassium slurry, obtain overflowing liquid, with
And concentration underflow, specifically, the solid phase particles in the essence potassium slurry are since self gravitation effect is gradually to the concentrator
Bottom free settling, to be separated by solid-liquid separation realization concentration, overflowing liquid floats on the top of the concentrator, and underflow is concentrated to sinking
Product, flows out the concentrator by pipeline.
Step 3: being separated by solid-liquid separation to the concentration underflow, solid phase and filtrate are obtained, obtains chlorine after the solid phase is dry
Change potassium, the filtrate cycle to the washing tank is to recycle.
In the present invention signified " being separated by solid-liquid separation to the concentration underflow ", both include directly to the concentration underflow into
Row is separated by solid-liquid separation, and also includes being separated by solid-liquid separation again after handling the concentration underflow, i.e., indirectly to the concentration underflow
It is separated by solid-liquid separation, above content is within the scope of the present invention.
In the present invention, the concentration underflow is separated by solid-liquid separation by centrifuge, the concentration underflow of different solid contents, i.e.,
The material of various concentration is separated by solid-liquid separation by centrifuge, in solid content certain (for 10%) of filtrate, wears filter rate
Difference, the results are shown in Table 1.
Filter rate is worn under 1 different feeds concentration of table
| Input concentration | 40% | 50% | 60% | 70% | 80% |
| Wear filter rate | 16.7% | 11.11% | 7.4% | 4.8% | 2.78% |
From table 1 it follows that improving the input concentration of centrifuge for subtracting in the case where certain filtrate solid content
It is fairly obvious that the effect of filter rate is worn less.When input concentration increases, material is easier to form bridge formation effect on the sieve of centrifuge,
It can effectively reduce the solid content in filtrate, input concentration is every to promote 10%, and the solid content in filtrate can reduce about 1%.
Therefore, the step 3 includes:
The concentration underflow is sieved, oversize and screenings are obtained；
The oversize is separated by solid-liquid separation, oversize solid phase and oversize filtrate are obtained, the oversize solid phase is dry
Potassium chloride is obtained after dry.
When sieving to the concentration underflow, a large amount of small particles materials contained in the concentration underflow form the sieve
Lower object, little particle when reducing later period separation of solid and liquid in slurry, avoids these small particles materials and rushes to centrifuge sieve
Brush, extends the service life of centrifuge, reduces invalid increased produce load in system.
Preferably, the concentration of the oversize is 60%~80%.After screening, the charging for improving centrifuge is dense
It spends to 60%~80%, reduces centrifuge and wear filter rate to 4%, and the solid-phase material in the oversize will not be to centrifugation
The sieve of machine causes to damage.
Preferably, the screenings is separated by solid-liquid separation, obtains screenings filtrate and screenings solid phase, the screenings
Potassium chloride is obtained after solid phase is dry.
Contain a large amount of small particles materials in the screenings, after the screenings is separated by solid-liquid separation, the screenings solid phase
Little particle potassium chloride can be obtained after drying, little particle potassium chloride is recycled while producing potassium chloride, is avoided
Material waste improves production yields.
Preferably, the screenings filtrate cycle is to the washing tank to recycle.
The screenings filtrate is back to the washing tank, is used as cleaning solution, it is possible to reduce the additional amount of fresh water.
In the present embodiment, if the concentration of the oversize is 60%, the solid content in the oversize filtrate is 8%,
It is 5.8% that centrifuge, which wears filter rate, and the sieve service life of centrifuge increases 2.5 months, and production 1t potassium chloride increases little particle
Potassium chloride 0.62t.
If the concentration of the oversize is 70%, the solid content in the oversize filtrate is 7%, and centrifuge wears filter rate
It is 3.2%, the sieve service life of centrifuge increases 3.5 months, and production 1t potassium chloride increases little particle potassium chloride 0.62t.
When the concentration of the oversize is 80%, the solid content in the oversize filtrate is 6%, and centrifuge wears filter rate and is
1.6%, the sieve service life of centrifuge increases 5 months, and production 1t potassium chloride increases little particle potassium chloride 0.62t.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and this
Field technical staff can be designed alternative embodiment without departing from the scope of the appended claims.In claim
In, any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" is not excluded for depositing
In element or step not listed in the claims.
Claims (7)
1. a kind of method of essence potassium slurry concentration dehalogenation, wherein the following steps are included:
It is washed Step 1: thick potassium is delivered to washing tank, obtains smart potassium slurry；
Step 2: smart potassium slurry pipeline transport to the concentrator is concentrated, concentration underflow is obtained；
Step 3: being separated by solid-liquid separation to the concentration underflow, solid phase and filtrate are obtained, obtains chlorination after the solid phase is dry
Potassium.
2. the method for essence potassium slurry concentration dehalogenation according to claim 1, wherein filtrate cycle described in step 3 to institute
Washing tank is stated to recycle.
3. the method for essence potassium slurry concentration dehalogenation according to claim 1, wherein the step 3 further include:
The concentration underflow is sieved, oversize and screenings are obtained；
The oversize is separated by solid-liquid separation, oversize solid phase and oversize filtrate are obtained, after the oversize solid phase is dry
Obtain potassium chloride.
4. it is according to claim 3 essence potassium slurry concentration dehalogenation method, wherein the concentration of the oversize be 60%~
80%.
5. the method for essence potassium slurry concentration dehalogenation according to claim 3, wherein carry out solid-liquid point to the screenings
From obtaining screenings filtrate and screenings solid phase, obtain potassium chloride after the screenings solid phase is dry.
6. the method for essence potassium slurry concentration dehalogenation according to claim 5, wherein the screenings filtrate cycle is to described
Washing tank is to recycle.
7. the method for essence potassium slurry concentration dehalogenation according to claim 1, wherein the concentrator obtains overflow when being concentrated
Liquid, the overflowing liquid is for preparing decomposition nut liquid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910116250.4A CN109626398A (en) | 2019-02-13 | 2019-02-13 | A kind of method of essence potassium slurry concentration dehalogenation |
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| CN201910116250.4A CN109626398A (en) | 2019-02-13 | 2019-02-13 | A kind of method of essence potassium slurry concentration dehalogenation |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1180046A (en) * | 1997-03-13 | 1998-04-29 | 青海盐湖工业集团有限公司 | Process for producing potassium chloride from carnallite |
| CN101323457A (en) * | 2008-07-25 | 2008-12-17 | 国家海洋局天津海水淡化与综合利用研究所 | Method for preparing potassium muriate by using sea water |
| CN104058427A (en) * | 2014-07-03 | 2014-09-24 | 青海盐湖工业股份有限公司 | High-grade potassium chloride production system and method thereof |
| CN204111339U (en) * | 2014-07-03 | 2015-01-21 | 青海盐湖工业股份有限公司 | A kind of higher-grade KCl production system |
| CN105668591A (en) * | 2016-04-01 | 2016-06-15 | 上海冠纯精细化工科技有限公司 | Production method of chemical reagent potassium chloride |
| WO2018069909A1 (en) * | 2016-10-13 | 2018-04-19 | Marine Mineral Resources Ltd | Process for the extraction of salts and fresh water from seawater or wastewater of various industries |
| CN107954452A (en) * | 2017-12-18 | 2018-04-24 | 青海盐湖工业股份有限公司 | A kind of KCl production device mother liquor at low temperature convert halogen technology |
| CN108862328A (en) * | 2018-06-29 | 2018-11-23 | 青海盐湖工业股份有限公司 | A kind of technique using carnallite production potassium chloride |
-
2019
- 2019-02-13 CN CN201910116250.4A patent/CN109626398A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1180046A (en) * | 1997-03-13 | 1998-04-29 | 青海盐湖工业集团有限公司 | Process for producing potassium chloride from carnallite |
| CN101323457A (en) * | 2008-07-25 | 2008-12-17 | 国家海洋局天津海水淡化与综合利用研究所 | Method for preparing potassium muriate by using sea water |
| CN104058427A (en) * | 2014-07-03 | 2014-09-24 | 青海盐湖工业股份有限公司 | High-grade potassium chloride production system and method thereof |
| CN204111339U (en) * | 2014-07-03 | 2015-01-21 | 青海盐湖工业股份有限公司 | A kind of higher-grade KCl production system |
| CN105668591A (en) * | 2016-04-01 | 2016-06-15 | 上海冠纯精细化工科技有限公司 | Production method of chemical reagent potassium chloride |
| WO2018069909A1 (en) * | 2016-10-13 | 2018-04-19 | Marine Mineral Resources Ltd | Process for the extraction of salts and fresh water from seawater or wastewater of various industries |
| CN107954452A (en) * | 2017-12-18 | 2018-04-24 | 青海盐湖工业股份有限公司 | A kind of KCl production device mother liquor at low temperature convert halogen technology |
| CN108862328A (en) * | 2018-06-29 | 2018-11-23 | 青海盐湖工业股份有限公司 | A kind of technique using carnallite production potassium chloride |
Non-Patent Citations (1)
| Title |
|---|
| 法耶德等: "《粉体工程手册》", 31 August 1992, 化学工业出版社 * |
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Application publication date: 20190416 |