CN103288102A - Method and device for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer - Google Patents
Method and device for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer Download PDFInfo
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- CN103288102A CN103288102A CN2013102685780A CN201310268578A CN103288102A CN 103288102 A CN103288102 A CN 103288102A CN 2013102685780 A CN2013102685780 A CN 2013102685780A CN 201310268578 A CN201310268578 A CN 201310268578A CN 103288102 A CN103288102 A CN 103288102A
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Abstract
The invention discloses a method for roasting water insoluble potassium ore to extract potassium chloride to produce potash fertilizer. The method comprises the following steps of: 1) respectively crushing chloride and calcium raw materials used as accessory ingredients of the water insoluble potassium ore, and distributing the materials to obtain a raw material; 2) grinding the obtained raw material until the residue on sieve of a square hole sieve of 80 microns is 10-40%; 3) conveying the obtained raw material into a rotary kiln for roasting, wherein the temperature of a burning zone is 750-1000 DEG C, and the standing time of the material in the kiln is 40-80 minutes; 4) cooling a roasted product; 5) dissolving and soaking the cooled roasted product in water, performing evaporating and crystallization separating on the solution to obtain a potassium chloride product with purity larger than 95%. The invention further discloses a device adopting the method. The method disclosed by the invention is simple in technological process, low in energy consumption and low in production cost.
Description
Technical field
The present invention relates to a kind of method and device that utilizes water-insoluble potassium ore deposit to produce potash fertilizer, particularly a kind of roasting water-insoluble potassium ore deposit extraction Repone K is produced method and the device of potash fertilizer.
Background technology
The external interdependency of China's potash fertilizer reaches more than 60%, has injured China's grain security.China's soluble potassium ore resources is shortage very, and 4.57 hundred million tons of retained reserves only account for 2.6% of world saving; Yet water-insoluble potassium ore resources is but very abundant, and total reserves is more than 10,000,000,000 tons.Accelerate the extractive technique of potassium in the research potassium bearing rock, potash fertilizer is made in development and use water-insoluble potassium ore deposit, is of great importance for improving China's potash fertilizer degree of self-sufficiency.
China's water-insoluble contains potassium rock ore deposit and comprises silicate minerals and sulfate mineral two classes, and common water-insoluble potassium-bearing mineral mostly is the potassium aluminium silicate mineral, mainly contains potassium felspar sand, glaukonine, white garnet, nepheline, phlogopite, white mica and biotite etc.Potash feldspar ore is the water-insoluble potassium resource that potassium content is higher, distribution is the widest, reserves are maximum.
Utilize extracting potassium from potash feldspar that following several method is roughly arranged both at home and abroad: blast-furnace smelting method, thermolysis water seaoning, hot legal system solubility in citric acid potash fertilizer, low-temperature decomposition method, the hot method of pressure and microbiological degradation method etc.The blast-furnace smelting method once in last century the eighties put into production in Wenxi County, Shanxi Province mid-term, start China's comprehensive utilization potassium felspar sand resource and realized the first that industrialization is produced, but have problems such as energy expenditure is big, the white cement difficult quality reaches a standard, the later stage is forced to change the line of production.The required furnace temperature of hot this method of legal system solubility in citric acid potash fertilizer is too high, and energy consumption is big, and only can make the low composite fertilizer of potassium content, sad economic closing.The low-temperature decomposition method is decomposing of potassium feldspar at low temperatures, though reduced energy consumption, the potassium rate of decomposition is low, and this method can cause environmental pollution and equipment heavy corrosion, and technology is difficult to promote.Press hot method pressure too high, facility investment is big, does not still have industrial production so far.The microbiological degradation method has characteristics such as technical process is short, energy consumption is low, pollution is little; but the viability that its outstanding shortcoming the is bacterial classification cycle weak, spawn culture is oversize, rate of decomposition is slow excessively, the potassium solubility rate is low excessively, and it is ripe not enough to make that this method is applied to large-scale industrial production.
Thermal decomposition method generally need be added the branch enzymolysis auxiliary agent and be carried out, and effective auxiliary agent has multiple, as NaOH, and K
2CO
3, CaSO
4, CaCO
3, CaCl
2With NaCl etc.NaOH and K
2CO
3The decomposition effect better, but expensive and corrodibility is strong; And CaSO
4And CaCO
3The decomposition effect relatively poor relatively; CaCl
2Lower with the price of NaCl, industrial raw material can obtain from the waste residue of soda industry and waste liquid, and little to the corrodibility of equipment, the rate of decomposition of acquisition is higher relatively.The Han Xiaozhao of domestic HeFei University of Technology etc. has studied different auxiliary agents (NaCl, CaCl
2Deng) to the influence of potassium felspar sand extraction yield; The Peng Qing of University Of Jishou waits also having studied NaCl and CaCl quietly
2The potassium process of carrying of potassium felspar sand when making auxiliary agent; The Hu Tianxi of East China University of Science etc. has studied CaCl
2Make the experimental study of mixed aid decomposing of potassium feldspar with NaCl.But all these researchs all only rest on laboratory stage, also have with a certain distance from suitability for industrialized production.Adopt low-cost auxiliary agent, and develop that a kind of flow process is simple, lower, the eco-friendly method of extracting soluble potassium from water-insoluble potassium ore deposit of energy consumption, in industrial realization extracting potassium from potash feldspar and obtain higher potassium extraction yield, for comprehensive utilization China water-insoluble potassium ore deposit significance is arranged.
Summary of the invention
The present invention provides a kind of roasting water-insoluble potassium ore deposit of carrying potassium and obtain higher potassium extraction yield from water-insoluble potassium ore deposit in industrial realization to extract method and the device that Repone K is produced potash fertilizer for solving the technical problem that exists in the known technology.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the method that Repone K is produced potash fertilizer is extracted in a kind of roasting water-insoluble potassium ore deposit, may further comprise the steps:
One) with muriate and calcareous raw material as the auxiliary agent in water-insoluble potassium ore deposit, prepare burden after the fragmentation respectively, to obtain raw material; During batching, the potassium in the water-insoluble potassium ore deposit is amounted to into K
+Expression, the muriate auxiliary agent is amounted to into Cl
-Expression, the calcareous raw material auxiliary agent is amounted to into Ca
2+Expression, in amount of substance, K
+: Cl
-: Ca
2+=1:(2～6): (0.2～2.5);
Two) raw grinding to the 80 μ m square hole sieve that obtains being tailed over is 10%～40%;
Three) the raw material powder that obtains is sent into rotary kiln baking, burning zone temperature is 750～1000 ° of C, and the residence time of material in kiln is 40～80 minutes;
Four) cooling product of roasting;
Five) cooled product of roasting is soaked with water-soluble, solution obtains purity greater than 95% Repone K product, for the production of potash fertilizer through pervaporation, Crystallization Separation.
Described step 3), rotary kiln baking is sent in the raw material powder elder generation preheating that obtains again.
Described muriate auxiliary agent is NaCl, CaCl
2And MgCl
2In the mixture of any one or at least two kinds, or effective constituent is NaCl, CaCl
2And MgCl
2In a kind of or at least two kinds a kind of or at least two kinds mineral.
Described calcareous raw material auxiliary agent is Wingdale or the CaCO after Wingdale or the calcining
3Or CaO.
Another technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the device that Repone K is produced potash fertilizer is extracted in a kind of aforesaid method roasting water-insoluble potassium ore deposit of adopting, and comprises the rotary kiln and the refrigerating unit that link to each other in turn.
The afterbody of described rotary kiln is connected with kiln tail smoke-box, and described kiln tail smoke-box is connected with pre-heating system, and described pre-heating system is provided with one-level whirlwind tube at least.
Described kiln tail smoke-box is connected with the import airduct of the final stage whirlwind tube of described pre-heating system.
Described refrigerating unit links to each other with described rotary kiln by the kiln hood cover.
Advantage and positively effect that the present invention has are:
1) with muriate and the calcareous raw material auxiliary agent as water-insoluble potassium ore deposit, adopt the technology of preheater preheating and calcined by rotary kiln, with less auxiliary agent, lower maturing temperature, just can obtain higher potassium extraction yield, production cost is lower.2) take full advantage of out the one-level whirlwind tube waste gas of pre-heating system and the heat content of the interior intensification air of refrigerating unit, reach the purpose of energy saving of system.3) technological design of the present invention is reasonable, and technical process is simple.
Description of drawings
Fig. 1 is the structural representation of one of device of roasting water-insoluble potassium of the present invention ore deposit extraction Repone K production potash fertilizer;
Fig. 2 is that two the structural representation that Repone K is produced the device of potash fertilizer is extracted in roasting water-insoluble potassium of the present invention ore deposit.
Among the figure: the 1st, feeding-distribution device, the 2nd, the one-level whirlwind tube of pre-heating system, the 3rd, the secondary whirlwind tube of pre-heating system, the 4th, kiln tail smoke-box, the 5th, rotary kiln, the 6th, kiln hood cover, the 7th, burner, the 8th, grate cooler, the 9th, dust-precipitator, the 10th, air lift mud pump, the 11st, cooling blower, the 81st, the one-level whirlwind tube of cooling cyclone, the 82nd, the secondary whirlwind tube of cooling cyclone, the 83rd, three grades of whirlwind tubes of cooling cyclone.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
The method that Repone K is produced potash fertilizer is extracted in a kind of roasting water-insoluble of the present invention potassium ore deposit, may further comprise the steps:
One) with muriate and calcareous raw material as the auxiliary agent in water-insoluble potassium ore deposit, prepare burden after the fragmentation respectively, to obtain raw material; During batching, the potassium in the water-insoluble potassium ore deposit is amounted to into K
+Expression, the muriate auxiliary agent is amounted to into Cl
-Expression, the calcareous raw material auxiliary agent is amounted to into Ca
2+Expression, in amount of substance, K
+: Cl
-: Ca
2+=1:(2～6): (0.2～2.5);
Two) raw grinding to the 80 μ m square hole sieve that obtains being tailed over is 10%～40%;
Three) the raw material powder that obtains is sent into rotary kiln baking, burning zone temperature is 750～1000 ° of C, and the residence time of material in kiln is 40～80 minutes;
Four) cooling product of roasting;
Five) cooled product of roasting is soaked with water-soluble, solution obtains purity greater than 95% Repone K product, for the production of potash fertilizer through pervaporation, Crystallization Separation.
Described muriate auxiliary agent is NaCl, CaCl
2And MgCl
2In the mixture of any one or at least two kinds, or effective constituent is NaCl, CaCl
2And MgCl
2In a kind of or at least two kinds a kind of or at least two kinds mineral.
Described calcareous raw material auxiliary agent is Wingdale or the CaCO after Wingdale or the calcining
3Or CaO.
Embodiment 1-4:
1) selection of raw material
Use has the potassium aluminium silicate mineral of chemical ingredients shown in the table 1.
The chemical ingredients of table 1 raw material (%)
| ? | LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | K 2O | Na 2O | Cl |
| The potassium ore deposit | 3.89 | 56.88 | 16.62 | 7.51 | 0.14 | 2.10 | 9.47 | 0.18 | 0.008 |
| Halite | N/A | 0.21 | 0.14 | 0 | 0.04 | 0.06 | 0.04 | 48.00 | 52.625 |
| Wingdale | 43.02 | 1.70 | 0.20 | 0.10 | 54.28 | 0.32 | 0.04 | 0.04 | 0.009 |
2) preparation of raw material
Potassium ore deposit, halite and Wingdale is broken respectively, by certain (K
+: Cl
-: Ca
2+) ratio of amount of substance prepares burden and obtain raw material, adopts Vertical Mill that raw grinding to 80 μ m is tailed over 10～40%.
3) roasting of raw material
With raw material powder feeding pre-heating system, the feeding capacity that control is suitable guarantees suitable kiln speed and kiln ventilation amount, and burning zone temperature is 750～1000 ° of C, and the residence time of material in kiln is 40～80 minutes;
4) cooling of product of roasting
By the multistage cyclone water cooler product of roasting is cooled to 250 ° below the C.
5) water logging with separate
Cooled product of roasting soaks with water-soluble, and solution obtains purity greater than 95% Repone K product, for the production of potash fertilizer through pervaporation, Crystallization Separation.Sampling is filtered in the laboratory water logging, adopts atomic absorption spectrophotometer to analyze the concentration of potassium in the filtrate, calculates the potassium extraction yield.
Water-insoluble potassium ore deposit adopts halite and Wingdale as auxiliary agent, and table 2 has provided the potassium extraction yield of the proportioning that raw material adopt, fineness, the interior residence time of material of kiln and acquisition.
Table 2 parameter and result
Content of the present invention is not limited in the above-described embodiment, and the technician in the same domain can propose other embodiment easily within technical director's thought of the present invention, for example: with main NaCl, the CaCl of using
2And MgCl
2In a kind of or at least two kinds mixture, or effective constituent is NaCl, CaCl
2And MgCl
2In a kind of or at least two kinds a kind of or at least two kinds of mineral replace halites, with Wingdale or the CaCO after the calcining
3Or CaO replacing lime stone; adopt other potassium aluminium silicate mineral; all can obtain result same as the previously described embodiments; such embodiment is that the technician expects on the basis of above-described embodiment easily in the same domain, and therefore such embodiment should be included in protection scope of the present invention.
See also Fig. 1, adopt aforesaid method roasting water-insoluble potassium ore deposit to extract Repone K and produce one of device of potash fertilizer, comprise grinding system (not shown), pre-heating system, rotary kiln, refrigerating unit, leaching device (not shown) and evaporative crystallization tripping device (not shown), rotary kiln 5 links to each other in turn with refrigerating unit.
In the present embodiment, the afterbody of described rotary kiln 5 links to each other with kiln tail smoke-box 4, and described kiln tail smoke-box 4 is connected with pre-heating system, and described pre-heating system is provided with secondary whirlwind tube.The charging airduct of the at different levels described whirlwind tube of described pre-heating system is connected with feeding-distribution device 1 respectively.Described refrigerating unit is the multistage cyclone water cooler.The one-level whirlwind tube 2 of described pre-heating system is provided with the airduct that is connected with grinding system.Described multistage cyclone water cooler is provided with the airduct that is connected with the kiln hood cover 6 of described rotary kiln 5.Described kiln hood cover 6 is connected by air lift mud pump 10 with described multistage cyclone water cooler.Described kiln tail smoke-box 4 is connected with the import airduct of the final stage whirlwind tube of described pre-heating system.Cooling blower 11 provides cold wind for three grades of whirlwind tubes of multistage cyclone water cooler.Burner 7 provides fuel for rotary kiln 5.
The principle of work of the device of above-mentioned production potash fertilizer:
Raw material behind the grinding are delivered to the kiln tail by lift technique, at first raw material enter behind the import airduct of one-level whirlwind tube 2 of pre-heating system through abundant dispersion, and carry out heat exchange with air-flow that secondary whirlwind tube 3 from pre-heating system comes out and realize pre-heating temperature elevation, the dust-contained airflow one-level whirlwind tube 2 that enters pre-heating system carries out gas solid separation then, isolated material enters the import airduct of the secondary whirlwind tube 3 of pre-heating system, air-flow after the separation enters the off gas treatment link, and the gas after the processing can be delivered to grinding system oven dry crude fuel; Material carries out heat exchange with the air-flow that comes out from kiln tail smoke-box 4 after entering the import airduct of secondary whirlwind tube 3 of pre-heating system, the dust-contained airflow secondary whirlwind tube 3 that enters pre-heating system carries out gas solid separation then, isolated material enters kiln tail smoke-box 4, and the air-flow after the separation enters the one-level whirlwind tube 2 of pre-heating system; Material enters rotary kiln 5 and carries out roasting behind process kiln tail smoke-box 4; Product of roasting falls by kiln hood cover 6, and be promoted to by air lift mud pump 10 behind the import airduct of cooling cyclone one-level whirlwind tube 81 through abundant dispersion, and carry out heat exchange with air-flow that cooling cyclone secondary whirlwind tube 82 comes out and realize cooling, dust-contained airflow enters cooling cyclone one-level whirlwind tube 81 and carries out gas solid separation then, isolated material enters the import airduct of cooling cyclone secondary whirlwind tube 82, and the air-flow after the separation enters rotary kiln 5 as secondary air from kiln hood cover 6; Material enters behind the import airduct of cooling cyclone secondary whirlwind tube 82 through abundant dispersion, and carry out heat exchange with air-flow that three grades of whirlwind tubes 83 of cooling cyclone come out and realize cooling, dust-contained airflow enters cooling cyclone secondary whirlwind tube 82 and carries out gas solid separation then, isolated material enters the import airduct of three grades of whirlwind tubes 83 of cooling cyclone, and the air-flow after the separation enters cooling cyclone one-level whirlwind tube 81; Material enters behind the import airduct of three grades of whirlwind tubes 83 of cooling cyclone through abundant dispersion, and carry out heat exchange with freezing air that cooling blower 11 blasts and lower the temperature again, dust-contained airflow enters three grades of whirlwind tubes of cooling cyclone 83 and carries out gas solid separation then, air-flow part after the separation enters cooling cyclone secondary whirlwind tube 82, remaining air-flow enters dust-precipitator 9, and the material that dust-precipitator 9 is collected and three grades of whirlwind tubes of cooling cyclone, 83 isolated materials combine and are delivered between the product of roasting storage cart; Gas after process dust-precipitator 9 gathers dust can be delivered to grinding system oven dry crude fuel, also can enter flare system.
The waste gas that comes out from the one-level whirlwind tube 2 of pre-heating system can cause raw material and fuel grinding system can drying material and fuel, effectively utilizes the waste gas heat content; An air part that heats up because of the cooling product of roasting in the multistage cyclone water cooler enters in the kiln from kiln hood cover 6 as secondary air, another part also can cause raw material and fuel grinding system drying material and fuel by dust-precipitator 9, reaches the purpose of energy saving of system.
Feeding-distribution device 1 can be controlled the position that raw material enter pre-heating system flexibly.When raw material all feed the import airduct of the one-level whirlwind tube 2 of pre-heating system, realize the two-stage heat exchange; When raw material all feed the import airduct of the secondary whirlwind tube 3 of pre-heating system, the one-level heat exchange only takes place.Can certainly directly raw material be fed rotary kiln and carry out roasting.
In the present embodiment, pre-heating system is the secondary cyclone preheater, but is not limited thereto.The progression of pre-heating system can also be level Four, three grades or one-level.
In the present embodiment, the multistage cyclone water cooler is made up of three grades of whirlwind tubes, but is not limited thereto.Also can also be formed by level Four or secondary whirlwind tube.Dust-precipitator 9 can be cyclone, also can be bag filter or dust precipitator.
See also Fig. 2, adopt aforesaid method roasting water-insoluble potassium ore deposit extract Repone K produce potash fertilizer device two, extract Repone K with roasting water-insoluble potassium ore deposit and produce the difference of one of the device of potash fertilizer and be: replace the multistage cyclone water coolers with grate cooler 8.Product of roasting falls into grate cooler 8 by kiln hood cover 6 and cools off, grate cooler 8 high temperature section are because cooling material and the air that heats up can enter rotary kiln 5 from kiln hood cover 6 as secondary air, and the air of the grate cooler 8 low-temperature zone dust of carrying under one's arms enters dust-precipitator 9; The material that dust-precipitator 9 is collected and grate cooler 8 cooled materials combine and are delivered between the product of roasting storage cart.
The used refrigerating unit of the device of above-mentioned production potash fertilizer is not limited to multistage cyclone water cooler and grate cooler, can also adopt the revolution cooler, or both combinations at least among their threes.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (8)
1. the method that Repone K is produced potash fertilizer is extracted in a roasting water-insoluble potassium ore deposit, it is characterized in that, may further comprise the steps:
One) with muriate and calcareous raw material as the auxiliary agent in water-insoluble potassium ore deposit, prepare burden after the fragmentation respectively, to obtain raw material; During batching, the potassium in the water-insoluble potassium ore deposit is amounted to into K
+Expression, the muriate auxiliary agent is amounted to into Cl
-Expression, the calcareous raw material auxiliary agent is amounted to into Ca
2+Expression, in amount of substance, K
+: Cl
-: Ca
2+=1:(2～6): (0.2～2.5);
Two) raw grinding to the 80 μ m square hole sieve that obtains being tailed over is 10%～40%;
Three) the raw material powder that obtains is sent into rotary kiln baking, burning zone temperature is 750～1000 ° of C, and the residence time of material in kiln is 40～80 minutes;
Four) cooling product of roasting;
Five) cooled product of roasting is soaked with water-soluble, solution obtains purity greater than 95% Repone K product, for the production of potash fertilizer through pervaporation, Crystallization Separation.
2. extract the method that Repone K is produced potash fertilizer according to the described roasting water-insoluble of claim 1 potassium ore deposit, it is characterized in that described step 3), rotary kiln baking is sent in the raw material powder elder generation preheating that obtains again.
3. extract the method that Repone K is produced potash fertilizer according to the described roasting water-insoluble of claim 1 potassium ore deposit, it is characterized in that described muriate auxiliary agent is NaCl, CaCl
2And MgCl
2In the mixture of any one or at least two kinds, or effective constituent is NaCl, CaCl
2And MgCl
2In a kind of or at least two kinds a kind of or at least two kinds mineral.
4. extract the method that Repone K is produced potash fertilizer according to the described roasting water-insoluble of claim 1 potassium ore deposit, it is characterized in that, described calcareous raw material auxiliary agent is Wingdale or the CaCO after Wingdale or the calcining
3Or CaO.
5. one kind is adopted the device of method roasting water-insoluble potassium ore deposit extraction Repone K production potash fertilizer according to claim 1, it is characterized in that, comprises the rotary kiln and the refrigerating unit that link to each other in turn.
6. extract the device that Repone K is produced potash fertilizer according to the described roasting water-insoluble of claim 5 potassium ore deposit, it is characterized in that, the afterbody of described rotary kiln is connected with kiln tail smoke-box, and described kiln tail smoke-box is connected with pre-heating system, and described pre-heating system is provided with one-level whirlwind tube at least.
7. extract the device that Repone K is produced potash fertilizer according to the described roasting water-insoluble of claim 6 potassium ore deposit, it is characterized in that described kiln tail smoke-box is connected with the import airduct of the final stage whirlwind tube of described pre-heating system.
8. extract the device that Repone K is produced potash fertilizer according to the described roasting water-insoluble of claim 5 potassium ore deposit, it is characterized in that described refrigerating unit links to each other with described rotary kiln by the kiln hood cover.
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| CN103739341A (en) * | 2014-01-14 | 2014-04-23 | 天津水泥工业设计研究院有限公司 | Production process and equipment of silicon-calcium-potassium fertilizer |
| CN104193424A (en) * | 2014-09-03 | 2014-12-10 | 四川大学 | Method for preparing potassium-rich solution from potassium feldspar by virtue of mechanical activation |
| CN104772317A (en) * | 2014-01-14 | 2015-07-15 | 贵阳铝镁设计研究院有限公司 | Comprehensive treatment method for waste fused salts and dust collection slag produced through titanium tetrachloride fused salt chlorination |
| CN106810320A (en) * | 2017-01-17 | 2017-06-09 | 华南农业大学 | Application and manufacture method of the activator in terms of cooling calcining manufacture activation potash fertilizer |
| CN107117630A (en) * | 2017-04-28 | 2017-09-01 | 延边大学 | It is a kind of to be calcined the method that illite efficiently carries potassium |
| CN110451528A (en) * | 2019-08-14 | 2019-11-15 | 包头钢铁（集团）有限责任公司 | A kind of nothing for extracting potassium chloride from k-rich slate is useless to utilize method |
| CN112758937A (en) * | 2021-01-14 | 2021-05-07 | 襄阳泽东化工集团有限公司 | Method for preparing potassium fluosilicate and NPK compound fertilizer from phosphorus-potassium associated ore |
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| CN103739341A (en) * | 2014-01-14 | 2014-04-23 | 天津水泥工业设计研究院有限公司 | Production process and equipment of silicon-calcium-potassium fertilizer |
| CN104772317A (en) * | 2014-01-14 | 2015-07-15 | 贵阳铝镁设计研究院有限公司 | Comprehensive treatment method for waste fused salts and dust collection slag produced through titanium tetrachloride fused salt chlorination |
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| CN104193424B (en) * | 2014-09-03 | 2019-08-09 | 四川大学 | A method of rich potassium solution is produced from potassium feldspar using mechanical activation |
| CN106810320A (en) * | 2017-01-17 | 2017-06-09 | 华南农业大学 | Application and manufacture method of the activator in terms of cooling calcining manufacture activation potash fertilizer |
| CN107117630A (en) * | 2017-04-28 | 2017-09-01 | 延边大学 | It is a kind of to be calcined the method that illite efficiently carries potassium |
| CN107117630B (en) * | 2017-04-28 | 2018-09-25 | 延边大学 | A method of roasting illite efficiently carries potassium |
| CN110451528A (en) * | 2019-08-14 | 2019-11-15 | 包头钢铁（集团）有限责任公司 | A kind of nothing for extracting potassium chloride from k-rich slate is useless to utilize method |
| CN112758937A (en) * | 2021-01-14 | 2021-05-07 | 襄阳泽东化工集团有限公司 | Method for preparing potassium fluosilicate and NPK compound fertilizer from phosphorus-potassium associated ore |
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