CN105129819A - Method of extracting potassium chloride raw products in sylvinite ore through air jigging - Google Patents
Method of extracting potassium chloride raw products in sylvinite ore through air jigging Download PDFInfo
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- CN105129819A CN105129819A CN201510614880.6A CN201510614880A CN105129819A CN 105129819 A CN105129819 A CN 105129819A CN 201510614880 A CN201510614880 A CN 201510614880A CN 105129819 A CN105129819 A CN 105129819A
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- repone
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Abstract
A method of extracting potassium chloride raw products in sylvinite ore through air jigging comprises the following steps of (1) crashing: crashing solid sylvinite ore; (2) jigging separation: feeding crashed materials into an air jigging separator, taking gas-solid suspensoid of pressurized air plus magnetite powder or ferrosilicon powder as a medium to separate sodium chloride from potassium chloride, so as to obtain potassium chloride concentrate and sodium chloride tailings; or when the sylvinite ore contains carnallite, performing a first section of jigging separation to obtain potassium chloride and carnallite bulk concentrate and sodium chloride tailings, and then performing a second section of jigging separation to obtain potassium chloride concentrate and carnallite tailings; (3) magnetic separation: feeding the potassium chloride concentrate into a magnetic separator, and recycling the magnetite powder or the ferrosilicon powder, so as to obtain a potassium chloride product. According to the method, the cyclic utilization rate of the medium is high, the technological process is simple, the operability is high, the separation result is good, the yield coefficient can reach up to 90 percent, the content of KCL in the obtained potassium chloride product is larger than or equal to 72 percent, and the method is specially suitable for water-deficient areas.
Description
Technical field
The present invention relates to a kind of method extracting Repone K crude product in sylvite ore, be specifically related to a kind of method that air jigging extracts Repone K crude product in underground mining sylvite ore.
Background technology
Potash fertilizer is one of agricultural three large base fertilizers (N P and K), and China at present potassium deficiency cultivated area accounts for 60% of total cultivated area, and potassium deficiency seriously have impact on crop yield and quality.China is world's potash fertilizer first country of consumption, adds up the total Apparent con-sumption of Chinese potash fertilizer in 2014 reach 1,742 ten thousand tons according to inorganic salt industry in China TIA, increases by 19.1% than 2013.In the 7 large class Mineral resources that China is the most in short supply (oil gas, high-grad iron ore deposit, sylvite, copper mine, bauxite, manganese ore, chrome ore), sylvite external dependence degree is very high, within 2014, the domestic potash fertilizer output of Repone K reaches the new highest record in history 8,770,000 tons (folding Repone K), import potash fertilizer reaches 8,030,000 tons (material objects), importation dependence about 50%.
At present, the treatment process of solid sylvite ore has flotation process, thermosoling, cold decomposition-flotation process, cool technology-crystallization method, reverse flotation-method such as cold junction crystallization, dense medium method.In the above-mentioned methods, flotation process needs the saturated mother liquor of sylvite to remove Isolating chlorinated potassium and sodium-chlor as medium, and thermosoling exists that temperature is high, the high obvious inferior position of pressure, and dense medium method is also just to its effect of special ore body competence exertion.Having no sylvite so far adopts the Isolating chlorinated sodium of air jigging, magnesium chloride to extract the relevant report of Repone K.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of technique simple, good separation effect, Repone K yield is high, produces without waste water, and easy to operate air jigging extracts the method for the thick product of Repone K in sylvite ore.
The technical solution adopted for the present invention to solve the technical problems is as follows: a kind of air jigging extracts the method for the thick product of Repone K in sylvite ore, comprises the following steps:
(1) broken: solid sylvite ore is carried out fragmentation, controlling sample ore size range is 1 ~ 2mm;
(2) jigging is separated: the material after step (1) gained fragmentation is sent into air jigging separator, to have pressure air+magnetite powder or to have pressure air+ferrosilicon powder to form density for 2.0 ~ 2.1g/cm
3gas-solid suspensoid be medium, by jigging be separated sodium-chlor is separated with Repone K, obtain Repone K rough concentrate and sodium-chlor mine tailing;
(3) magnetic separation: step (2) gained Repone K concentrate is sent into magnetic separator, reclaims magnetite powder or ferrosilicon powder, obtains Potassium Chloride Product.
Because the density of mineral each in solid sylvite ore is different: Repone K density 1.98g/cm
3, sodium-chlor density 2.13g/cm
3, contriver studies through test of many times, and showing that jigging is separated gas-solid suspensoid Media density scope is 2.0 ~ 2.1g/cm
3.
Further, in step (1), the main component of described solid sylvite ore is KCl and NaCl, and wherein, KCl mass percentage is 30% ~ 50%(preferably 40% ~ 48%).
Described NaCl mass percentage is 40% ~ 70%(preferably 45% ~ 55%).
Further, in step (1), described crumbling method is two sections of closed circuit crushings.If solid sylvite ore size range < is 1mm, the meticulous sorting being unfavorable for air jigging of granularity, if solid sylvite ore size range > is 2mm, granularity is excessively slightly unfavorable for fully dissociating of sylvite ore; Two sections of closed circuit crushings are conducive to the granularity controlling the fragmentation of solid sylvite ore, thus sylvite ore can fully be dissociated, and are conducive to air jigging again.
Further, in step (2), described in have pressure air pressure be 0.5 ~ 1.2MPa.
Further, sodium-chlor mine tailing described in step (2) is isolated magnetite powder or ferrosilicon powder through magnetic separation.
Air jigging extracts a method for the thick product of Repone K in sylvite ore, comprises the following steps:
(1) broken: solid sylvite ore is carried out fragmentation, controlling sample ore size range is 1 ~ 2mm;
(2) first paragraph jigging is separated: the material after step (1) gained fragmentation is sent into air jigging separator, to have pressure air+magnetite powder or to have pressure air+ferrosilicon powder to form density for 2.0 ~ 2.1g/cm
3gas-solid suspensoid medium, by jigging be separated Repone K is separated with sodium-chlor with carnallitite, obtain Repone K, carnallitite collective concentrate and sodium-chlor mine tailing;
(3) second segment jigging is separated: step (2) gained Repone K and carnallitite collective concentrate are sent into air jigging separator, to have pressure air+magnetite powder or to have pressure air+ferrosilicon powder to form density for 1.6 ~ 1.9g/cm
3(preferably 1.70 ~ 1.85g/cm
3) gas-solid suspensoid medium, by jigging be separated Repone K is separated with carnallitite, obtain Repone K concentrate and carnallitite mine tailing;
(4) magnetic separation: step (3) gained Repone K concentrate is sent into magnetic separator, reclaims magnetite powder or ferrosilicon powder, obtains Potassium Chloride Product.
Because the density of mineral each in solid sylvite ore is different: carnallitite density 1.6g/cm
3, Repone K density 1.98g/cm
3, sodium-chlor density 2.13g/cm
3, magnesium chloride density 1.56g/cm
3, contriver studies through test of many times, and showing that first paragraph jigging is separated gas-solid suspensoid Media density scope is 2.0 ~ 2.1g/cm
3; Second segment heavy-fluid separating medium density range is 1.6 ~ 1.9g/cm
3, be preferably 1.70 ~ 1.85g/cm
3.
Further, in step (1), the main component of described solid sylvite ore is KCl, NaCl and KClMgCl
26H
2o, wherein, KCl mass percentage is 30% ~ 50%.
Described NaCl mass percentage is 40% ~ 55%, KClMgCl
26H
2o mass percentage is 10% ~ 15%.
Further, in step (1), the mode of described fragmentation is two sections of closed circuit crushings.
Further, in step (2), (3), described in have pressure air pressure be 0.5 ~ 1.2MPa.
Further, sodium-chlor mine tailing described in step (2) is isolated magnetite powder or ferrosilicon powder through magnetic separation; Carnallitite mine tailing described in step (3) is isolated magnetite powder or ferrosilicon powder through magnetic separation.
The magnetite powder adopted in the inventive method or the purity of ferrosilicon powder are more than 95%.
The side product chlorinated sodium mine tailing produced in the inventive method can be used for backfill.
The solid sylvite ore that the present invention is directed to heterogeneity gives the method that two kinds are extracted Repone K, when sylvite ore main component is KCl and NaCl, utilization has pressure air+magnetite powder or ferrosilicon powder as medium, using the NaCl in sylvite ore as hypostasis, KCl is as floating thing, carry out one section of jigging to be separated, obtain the Potassium Chloride Product that purity is higher; When sylvite ore main component is KCl, NaCl and KClMgCl
26H
2o, namely wherein containing carnallitite, utilization has pressure air+magnetite powder or ferrosilicon powder as medium, and using the NaCl in sylvite ore as hypostasis, KCl and carnallitite are as floating thing, after isolating the collective concentrate of Repone K and carnallitite, further utilization has pressure air+magnetite powder or ferrosilicon powder as medium, and using the KCl in the collective concentrate of Repone K and carnallitite as hypostasis, carnallitite is as floating thing, carry out the separation of second segment jigging, obtain the Potassium Chloride Product that purity is higher.Make use of the density difference opposite sex principle of Repone K, sodium-chlor, carnallitite, magnesium chloride in aforesaid method, adopt jigging separation method each component to be separated.
The beneficial effect of the inventive method is: compared with the existing technology, the maximum feature of the present invention does not need to utilize saturated mother liquor, also there is not the influence factor such as temperature, pressure, finally do not have sewage to produce, technical process is simple, workable, medium circulation utilization ratio is high, pollution-free, good separation effect, the thick product yield of the inventive method Repone K is high, and yield can up to 90%; The thick good product quality of gained Repone K, KCl content >=72%, economic benefit is obvious.The method is especially applicable to west area and the highlands of lack of water.In addition, the recovery utilization rate of magnetite powder or ferrosilicon powder all >=97%.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
In the embodiment of the present invention, sylvite ore used belongs to solid sylvite class; Magnetite powder used, ferrosilicon powder purity are more than 95%.
embodiment 1
(1) broken: solid sylvite ore (main component: KCl and NaCl, wherein, KCl mass percentage is 43%, NaCl mass percentage is 50%) is carried out two sections of closed circuit crushings, controlling sample ore size range is 1 ~ 2mm; (2) jigging is separated: the material after step (1) gained fragmentation is sent into air jigging separator, forms density for 2.0g/cm with the pressure air+magnetite powder that has of 0.5MPa
3gas-solid suspensoid be medium, by jigging be separated sodium-chlor is separated with Repone K, obtain Repone K concentrate and sodium-chlor mine tailing, sodium-chlor mine tailing isolated magnetite powder through magnetic separation, the sodium-chlor mine tailing after magnetic separation be used for backfill; (3) magnetic separation: step (2) gained Repone K concentrate is sent into magnetic separator, reclaim magnetite powder, obtain Potassium Chloride Product, magnetite powder recovery utilization rate is 97%, and in Potassium Chloride Product, KCE content is 75%, and Repone K yield is 90%.
embodiment 2
(1) broken: solid sylvite ore (main component: KCl and NaCl, wherein, KCl mass percentage is 45%, NaCl mass percentage is 45%) is carried out two sections of closed circuit crushings, controlling sample ore size range is 1 ~ 2mm; (2) jigging is separated: the material after step (1) gained fragmentation is sent into air jigging separator, forms density for 2.08g/cm with the pressure air+ferrosilicon powder that has of 1.0MPa
3gas-solid suspensoid be medium, by jigging be separated sodium-chlor is separated with Repone K, obtain Repone K concentrate and sodium-chlor mine tailing, sodium-chlor mine tailing isolated ferrosilicon powder through magnetic separation, the sodium-chlor mine tailing after magnetic separation be used for backfill; (3) magnetic separation: step (2) gained Repone K concentrate is sent into magnetic separator, reclaim ferrosilicon powder, obtain Potassium Chloride Product, ferrosilicon powder recovery utilization rate is 97.6%, and in Potassium Chloride Product, KCE content is 80%, and Repone K yield is 87.5%.
embodiment 3
(1) broken: by solid sylvite ore (main component: KCl, NaCl and KClMgCl
26H
2o, wherein, KCl mass percentage is 30%, NaCl mass percentage is 55%, carnallitite KClMgCl
26H
2o mass percentage is 10%) carry out two sections of closed circuit crushings, controlling sample ore mean particle size is 1 ~ 2mm; (2) first paragraph jigging is separated: the material after step (1) gained fragmentation is sent into air jigging separator, forms density for 2.02g/cm with the pressure air+magnetite powder that has of 1.2MPa
3gas-solid suspensoid medium, by jigging be separated Repone K, carnallitite are separated with sodium-chlor, obtain Repone K, carnallitite collective concentrate and sodium-chlor mine tailing, sodium-chlor mine tailing isolated magnetite powder through magnetic separation, the sodium-chlor mine tailing after magnetic separation be used for backfill; (3) second segment jigging is separated: step (2) gained Repone K, carnallitite collective concentrate are sent into air jigging separator, forms density for 1.75g/cm with the pressure air+magnetite powder that has of 1.2MPa
3gas-solid suspensoid medium, by jigging be separated Repone K is separated with carnallitite, obtain Repone K concentrate and carnallitite mine tailing, carnallitite mine tailing isolated magnetite powder through magnetic separation, the carnallitite mine tailing after magnetic separation be used for backfill; (4) magnetic separation: step (3) gained Repone K concentrate is sent into magnetic separator, reclaim magnetite powder, obtain Potassium Chloride Product, magnetite powder recovery utilization rate is 97%, and in Potassium Chloride Product, KCE content is 75%, and Repone K yield is 89.6%.
embodiment 4
(1) broken: by solid sylvite ore (main component: KCl, NaCl and KClMgCl
26H
2o, wherein, KCl mass percentage is 35%, NaCl mass percentage is 50%, carnallitite KClMgCl
26H
2o mass percentage is 15%) carry out two sections of closed circuit crushings, controlling sample ore mean particle size is 1 ~ 2mm; (2) first paragraph jigging is separated: the material after step (1) gained fragmentation is sent into air jigging separator, forms density for 2.07g/cm with the pressure air+ferrosilicon powder that has of 0.8MPa
3gas-solid suspensoid medium, by jigging be separated Repone K, carnallitite are separated with sodium-chlor, obtain Repone K, carnallitite collective concentrate and sodium-chlor mine tailing, sodium-chlor mine tailing isolated ferrosilicon powder through magnetic separation, the sodium-chlor mine tailing after magnetic separation be used for backfill; (3) second segment jigging is separated: step (2) gained Repone K, carnallitite collective concentrate are sent into air jigging separator, forms density for 1.85g/cm with the pressure air+ferrosilicon powder that has of 0.8MPa
3gas-solid suspensoid medium, by jigging be separated Repone K is separated with carnallitite, obtain Repone K concentrate and carnallitite mine tailing, carnallitite mine tailing isolated ferrosilicon powder through magnetic separation, the carnallitite mine tailing after magnetic separation be used for backfill; (4) magnetic separation: step (3) gained Repone K concentrate is sent into magnetic separator, reclaim ferrosilicon powder, obtain Potassium Chloride Product, ferrosilicon powder recovery utilization rate is 98%, and in Potassium Chloride Product, KCE content is 72%, and Repone K yield is 90%.
Claims (10)
1. air jigging extracts a method for the thick product of Repone K in sylvite ore, it is characterized in that: comprise the following steps:
(1) broken: solid sylvite ore is carried out fragmentation, controlling sample ore size range is 1 ~ 2mm;
(2) jigging is separated: the material after step (1) gained fragmentation is sent into air jigging separator, to have pressure air+magnetite powder or to have pressure air+ferrosilicon powder to form density for 2.0 ~ 2.1g/cm
3gas-solid suspensoid be medium, by jigging be separated sodium-chlor is separated with Repone K, obtain Repone K rough concentrate and sodium-chlor mine tailing;
(3) magnetic separation: step (2) gained Repone K concentrate is sent into magnetic separator, reclaims magnetite powder or ferrosilicon powder, obtains Potassium Chloride Product.
2. air jigging extracts the method for the thick product of Repone K in sylvite ore according to claim 1, and it is characterized in that: in step (1), the main component of described solid sylvite ore is KCl and NaCl, and wherein, KCl mass percentage is 30% ~ 50%.
3. according to claim 1 or 2, air jigging extracts the method for the thick product of Repone K in sylvite ore, and it is characterized in that: in step (1), described crumbling method is two sections of closed circuit crushings.
4. extract the method for the thick product of Repone K in sylvite ore according to the described air jigging of one of claims 1 to 3, it is characterized in that: in step (2), described in have the pressure of pressure air to be 0.5 ~ 1.2MPa.
5. extract the method for the thick product of Repone K in sylvite ore according to the described air jigging of one of Claims 1 to 4, it is characterized in that: sodium-chlor mine tailing described in step (2) is isolated magnetite powder or ferrosilicon powder through magnetic separation.
6. air jigging extracts a method for the thick product of Repone K in sylvite ore, it is characterized in that: comprise the following steps:
(1) broken: solid sylvite ore is carried out fragmentation, controlling sample ore size range is 1 ~ 2mm;
(2) first paragraph jigging is separated: the material after step (1) gained fragmentation is sent into air jigging separator, to have pressure air+magnetite powder or to have pressure air+ferrosilicon powder to form density for 2.0 ~ 2.1g/cm
3gas-solid suspensoid medium, by jigging be separated Repone K is separated with sodium-chlor with carnallitite, obtain Repone K, carnallitite collective concentrate and sodium-chlor mine tailing;
(3) second segment jigging is separated: step (2) gained Repone K and carnallitite collective concentrate are sent into air jigging separator, to have pressure air+magnetite powder or to have pressure air+ferrosilicon powder to form density for 1.6 ~ 1.9g/cm
3gas-solid suspensoid medium, by jigging be separated Repone K is separated with carnallitite, obtain Repone K concentrate and carnallitite mine tailing;
(4) magnetic separation: step (3) gained Repone K concentrate is sent into magnetic separator, reclaims magnetite powder or ferrosilicon powder, obtains Potassium Chloride Product.
7. air jigging extracts the method for the thick product of Repone K in sylvite ore according to claim 6, and it is characterized in that: in step (1), the main component of described solid sylvite ore is KCl, NaCl and KClMgCl
26H
2o, wherein, KCl mass percentage is 30% ~ 50%.
8. according to claim 6 or 7, air jigging extracts the method for the thick product of Repone K in sylvite ore, and it is characterized in that: in step (1), the mode of described fragmentation is two sections of closed circuit crushings.
9. extract the method for the thick product of Repone K in sylvite ore according to the described air jigging of one of claim 6 ~ 8, it is characterized in that: in step (2), (3), described in have the pressure of pressure air to be 0.5 ~ 1.2MPa.
10. extract the method for the thick product of Repone K in sylvite ore according to the described air jigging of one of claim 6 ~ 9, it is characterized in that: sodium-chlor mine tailing described in step (2) is isolated magnetite powder or ferrosilicon powder through magnetic separation; Carnallitite mine tailing described in step (3) is isolated magnetite powder or ferrosilicon powder through magnetic separation.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5470554A (en) * | 1993-05-25 | 1995-11-28 | Environmental Projects, Inc. | Benefication of saline minerals |
| CN103253687A (en) * | 2013-05-25 | 2013-08-21 | 朱建江 | Improvement of potassium nitrate producing method |
| CN104760977A (en) * | 2015-04-01 | 2015-07-08 | 化工部长沙设计研究院 | Method for separating and extracting potassium chloride crude product from solid potassic salt ore heavy-liquid |
-
2015
- 2015-09-24 CN CN201510614880.6A patent/CN105129819B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5470554A (en) * | 1993-05-25 | 1995-11-28 | Environmental Projects, Inc. | Benefication of saline minerals |
| CN103253687A (en) * | 2013-05-25 | 2013-08-21 | 朱建江 | Improvement of potassium nitrate producing method |
| CN104760977A (en) * | 2015-04-01 | 2015-07-08 | 化工部长沙设计研究院 | Method for separating and extracting potassium chloride crude product from solid potassic salt ore heavy-liquid |
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