51 results about "Sylvinite" patented technology

The invention relates to a clean production process of plateau sulfate type boron-lithium salt lake brine. The process comprises the following steps of: (1) arranging a pre-airing pond, a mirabilite pond, a NaCl pond, a carnallite pond, an epsom salt pond I, a magnesium removing pond, an epsom salt pond II, a boron pond, a lithium pond and an old brine pond; (2) controlling the sodium ion concentration in plateau sulfate type boron-lithium salt lake brine, precipitating mirabilite out in winter to obtain brine A, naturally evaporating the brine A, and salting out to obtain brine B; (3) naturally evaporating the brine B, and precipitating sylvine and carnallite out in sequence to obtain brine C; (4) naturally evaporating the brine C, precipitating an epsom salt out, and performing solid-liquid separation to obtain brine D and a solid A; (5) blending the brine D with mirabilite, removing magnesium to obtain brine E, and naturally evaporating brine E to obtain brine F and a solid B; (6) performing a hydration reaction on brine F, naturally evaporating, and precipitating reservoir water/inderite and brine G out; and (7) evaporating brine G or refrigerating for precipitating lithium sulfate, and processing the lithium sulfate into a corresponding product. The process has the advantages of comprehensive utilization of natural energy, saving in energy and environment friendliness.

The invention discloses a process for extracting KCl coarse grains by carrying out flotation on solid sylvinite primary ores, comprising the following steps; (1) crushing the solid sylvinite primary ores; (2) carrying out coarse grinding on the crushed sylvinite; (3) feeding the sylvinite material subject to coarse grinding into a flotation machine for primary rougher flotation and secondary refined flotation; and (4) filtering and drying concentrates obtained by the secondary refined flotation, thus obtaining the high-quality KCl bulky grain product. The product is purely white and transparent; the average grain size is 1mm-2mm; and the KCl grade is not less than 90% (by weight), thus exceeding the common industrial and agricultural high-class KCl product standards of class-II and class-III and reaching the special industrial KCl standard of national standard GB6549-1996I.

The invention discloses a method for extracting potassium chloride from a high-silt-content high-grade feldspar salt mine. The method comprises the following steps: (1) crushing and grinding the feldspar salt mine to obtain ore particles; (2) mixing the ore particles and a solvent to prepare slurry with the mass concentration of 25-40 percent, and desliming to obtain deslimed concentrate; and (3) preparing 20-30% ore pulp from the deslimed concentrate by using potassium chloride and sodium chloride co-saturated mother liquor, simultaneously adding a slurry inhibitor and a collecting agent, carrying out rough concentration on the ore pulp to obtain rough ore concentrate and concentrate to be swept, and carrying out more than two stages of selection on the rough ore concentrate to obtain selected foams, and dewatering the selected foams to obtain a potassium chloride product. According to the method disclosed by the invention, not only is the problem of waste ore accumulation solved, but also the environment-friendly problem is solved, resources are sufficiently utilized, wastes are turned into treasures, and the economic and social benefits are relatively remarkable.

The invention discloses a method for separating carbonate from carbonate bittern containing lithium and potassium to prepare sylvinite ore and lithium carbonate concentrate, wherein the carbonate bittern containing lithium and potassium is pre-concentrated, the carbonate is separated from the carbonate bittern containing lithium and potassium by means of combination of frozen alkaline and a precipitant so as to prepare the concentrated bittern with the content of carbonate reduced, then the concentrated bittern is further concentrated, the sylvinite ore separated out by evaporative crystallization is separately collected and prepared after the content of the potassium ion in the bittern is up to 51.70g/L, the lithium enrichment bittern with the content of the lithium ion being 4-26g/L is prepared, and the lithium enrichment bittern is guided into a crystallizer, added with sodium carbonate, and separated in a centrifugal way to obtain the lithium carbonate concentrate. Compared with the prior art, the method provided by the invention has the following advantages: the lithium enrichment concentration is increased because the carbonate in the bittern is removed; the purity of the obtained lithium carbonate and the overall recovery of the lithium ion are high; continuous industrialization and automated production of the preparation of the lithium carbonate concentrate can be implemented; high-grade sylvinite can be prepared from a salt pan, and the potassium ion recovery of the salt pan is increased; and the residual bittern of which the lithium is extracted can be comprehensively developed conveniently so as to further extract substances like boron, rubidium, cesium bromine.

Disclosed is a nutrient for promoting growth of full herbal medical plants, which is composed of the following main ingredients in percentage by weight: 10-30% of nucleotide sylvinite, 20-70% of grape sugar, 10-20% of amino acid and 10-30% of trace elements. The weight ratio of trace elements, such as Mn to B to Fe to Zn to Cu to Mo is 5:2:3:3:2:2. The nutrient is low in production cost, less in amount, easy to produce and promote massively and reasonable in interaction, is targeted strongly, non-toxic, harmless, non-residual, and no adverse side effect, has the advantages of increasing production, income and benefits, strengthening resistance, and promoting the growth of full herbal medical plants. The nutrient can increase the yield by 40%-100%.

The invention provides a method for extracting Mg, K, B and Li from mixed brine by utilizing natural energy. The method comprises the following steps: evaporating, freezing and evaporating carbonate salt lake brine and obtaining brine A when the content of Li in the brine is smaller than or equal to 2.5g/L or the content of lithium carbonate in precipitated solid ores is smaller than or equal to 0.5%; evaporating, freezing and evaporating sulfate salt lake brine and obtaining brine B when the content of Mg in the brine is more than or equal to 10g/L; obtaining brine C after mixing and reaction between the brine A and the brine B; obtaining brine D when naturally evaporating the brine C until the content of sulfate radicals is 5-40g/L; obtaining brine E after freezing the brine D to precipitate mirabilite; evaporating the brine E to a certain degree to obtain brine F; evaporating the brine F to precipitate sylvite and then obtaining brine G; obtaining brine H after freezing the brine G to precipitate mirabilite; mixing the brine H with mixed alkali obtained in the first step to react and then obtaining brine I when the concentration of Li in the solution is 0.5-1.5g/L; leading the brine I to a cooling tank and naturally evaporating the brine to precipitate borax.

The invention provides a method for processing sylvite salt mine with high mud content. The sylvite salt mine with high mud content is subjected to flotation desalination, the overflow drying materials of the floated sylvite salt mine with high mud content are roasted at high temperature, and the physical and chemical properties of boulder clay substances in the sylvite salt mine with high mud content are changed, so that the salt mine is changed from fine particles to coarse particles and changed from hydrophobicity to hydrophilcity and sinks to enter ore pulp during floatation; and because the salt mine does not float up with foam, the salt mine is completely separated from potassium chloride grains which float up with the foam. The limitation that only low-mud-content green potassium raw ore can be processed in the traditional floatation processing technology is broken, and the problem that the mud cannot be separated from potassium chloride in the sylvite salt mine with high mud content is solved.

A method for extraction of a potassium chloride crude product from sylvine ore by triboelectric separation comprises the following steps: (1) crushing, to be more specific, solid sylvine ore is crushed, the material particle size is controlled in the range of 1-2mm; (2) ore grinding, to be more specific, the material crushed in the step (1) is ground until the mass content of the material less than or equal to 200 mesh is greater than or equal to 90%; (3) surface pretreatment, to be more specific, the material ground in the step (1) is sent into a preprocessor, and is added with a surface modifier for uniform mixing; and (4) electrostatic separation, to be more specific, the material added with the surface modifier in the step (3) is sent into an electrostatic separator for triboelectric separation of potassium chloride to obtain the potassium chloride crude product. The method does not require the use of saturated liquor, is not affected by factors such as temperature, pressure, and the like, ultimately does not produce sewage, and is simple in process, easy to operate, free of pollution, and good in separation efficiency, the yield is up to 90%; the resulting chloride potassium crude product has good quality, the chloride potassium content is up to 90%, and the economic benefit is obvious.

The invention provides a production technology for recycling potassium chloride from saturated glaserite mother liquor. The production technology comprises the following steps of 1, conducting brine mixing, wherein the saturated glaserite mother liquor and old brine in a salt lake are mixed according to the mass ratio of 1:0.6-1.5, and mother liquor mixed with the brine is obtained; 2, sun-curing sylvine, wherein after 20 wt%-35 wt% of water in the mother liquor mixed with the brine is naturally evaporated, solid-liquor separation is conduced, and then the sylvine and mother liquor A are obtained; 3, sun-curing carnallite, wherein after 10 wt%-30 wt% of water in the mother liquor A is naturally evaporated, solid-liquor separation is conduced, and carnallite and mother liquor B are obtained; 4, extracting potassium chloride, wherein floatation is conducted on the sylvine and the carnallite, and then the potassium chloride product is obtained. By the adoption of the production technology, the recovery rate of K+ in a technological salt field reaches up to 96.61%, the total yield of the K+ of a system reaches up to 91.95%, the purity of the potassium chloride product reaches up to 98.06%, and the potassium chloride product meets the agricultural potassium chloride superior product standard. The production technology is simple, low in energy consumption and cost, avoids co-separation of potassium-containing sulfate minerals, part of old brine in the salt field can be digested, and the environmental-protection problem is effectively relieved.

The invention discloses a method for preparing potassium chloride from carnallite. The method comprises the following steps: firstly, carrying out high-temperature water-soluble mining treatment on carnallite ore by using fresh water to obtain potassium-rich saturated brine, mixing the potassium-rich saturated brine, sylvine saturated liquid and old brine, performing brine mixing, evaporation anddecomposition treatment to obtain artificial sylvine, and finally, carrying out low-temperature selective dissolution treatment on the artificial sylvine by using fresh water to prepare potassium chloride. The carnallite ore is exploited by adopting hot water, so that the content of sodium chloride in the potassium-rich saturated brine is reduced, the artificial sylvine is prepared into potassiumchloride only by one-time low-temperature selective dissolution, so that high yield and high quality of potassium chloride are guaranteed, and unnecessary energy consumption and impurity accumulationcaused by multiple times of cyclic hot-melting crystallization treatment of sylvine are avoided, meanwhile, the method provided by the invention is suitable for carnallite ores of different grades, extremely high in adaptability, loose in technical condition and convenient for technical promotion and implementation.

The invention relates to the field of salt pans, in particular to a method for improving the production efficiency of a chloride type salt pan and a chloride type salt pan product. According to the method, a mirabilite solution is firstly added into brine, so that magnesium ions in the brine are combined with sulfate radicals in mirabilite, the magnesium ions are separated out of the brine in theform of magnesium sulfate crystals, and the content of the magnesium ions in the brine is reduced; and then the residual brine with the reduced content of the magnesium ions is subjected to evaporation and sun treatment to obtain a salt pan product. According to the method, the magnesium ions in the brine are firstly reduced, and the magnesium salt does not need to be dried in the sun in the subsequent evaporation and salifying process, so that the salifying time is greatly shortened, and the production efficiency of the salt pan is improved. After magnesium ions are reduced, a potash fertilizer production route is changed from a bischofite route to a more energy-saving and simpler sylvine route, so that the process difficulty is greatly reduced.

The invention specifically relates to a desliming agent for slime-bearing sylvinite, belonging to the field of the chemical industry. The desliming agent for the slime-bearing sylvinite is carboxymethyl cellulose with an etherification degree of 0.75 to 0.9. The invention also discloses a processing method for the slime-bearing sylvinite. As the desliming agent is added in the process of processing of the slime-bearing sylvinite, slime in the slime-bearing sylvinite can be substantially removed. Compared with desliming methods/reagents in the prior art, the desliming agent provided by the invention is less in usage amount and is added once in the whole processing process; so treating process is substantially simplified, desliming efficiency is improved, and treating cost is reduced. Results of production and trial application show that the desliming agent and the processing method with high desliming rate are especially applicable to large Kunteyi salt flat potassium ore deposits in Lenghu Town, Qinghai Province, China.

The invention relates to a method for treating potassium mixed salt ore by adopting dense media and cold crystallization direct flotation, and belongs to the technical field of mineral processing. Themethod comprises the following steps of crushing the potassium mixed salt type ore to below 10-30mm, dividing the crushed potassium mixed salt type ore into a coarse fraction and a fine fraction, andsorting the coarse fraction ore by adopting a dense medium cyclone to obtain three products, namely carnallite rough concentrate, potassium mixed salt ore and sylvine ore; carrying out cold decomposition crystallization or reverse flotation-cold decomposition crystallization on the carnallite rough concentrate, and refining to obtain KCl concentrate; and adopting the cold decomposition crystallization-direct flotation process in the potassium mixed salt ore and the fine-grained materials, adopting a direct flotation process in the sylvine ore, and then refining to obtain KCl concentrate. According to the method, the potassium mixed salt raw ore is divided into the low-sodium carnallite ore, the carnallite and sylvine mixed ore and the sylvine ore through three-product dense medium separation in advance, then different treatment processes are adopted for the three different ores, and the method has the advantages of being high in process adaptability, low in energy consumption, large in final KCl product granularity, high in recovery rate and the like.

The invention discloses a preparation method of low-sodium salt. The preparation method comprises the steps of decomposing carnallite to obtain first mother liquor and sylvinite solid; mixing the sylvinite solid with fresh water to form second mother liquor; and mixing the second mother liquor and old brine, reacting and crystallizing to obtain the low-sodium salt. The preparation method provided by the invention is simple in process flow, low in energy consumption, low in cost, green and environment-friendly; and the prepared low-sodium salt product meets the requirements of the low-sodium salt QB/T2019-2020 standard, is high in purity and controllable in particle size, and has relatively strong market competitiveness.

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.

The invention relates to a preparation method of a solid catalyst for ozone heterogeneous oxidation, which belongs to the technical fields of environmental protection and chemical catalysts. The preparation method is to use attapulgite, diopside, montmorillonite, potassium halite, fly ash and coal gangue porous materials as carriers, and the carrier is modified by lithium hypochlorite and bis(acetylacetonate) beryllium. , adding the surfactant dioctadecylmethyl-2-hydroxyethylammonium chloride to carry out surface activation treatment under the action of ultrasonic waves, and then the ultrasonic surface activation carrier is mixed with composite mineralizer borax and potassium sulfate in a hydrothermal reaction kettle , catalyst precursors tris(3‑trifluoroacetyl‑D‑camphor) praseodymium (III), 1,1,1‑trifluoroacetylacetonate neodymium, tris (6,6,7,7,8,8 ,8‑heptafluoro‑2,2‑dimethyl‑3,5‑octenedione) dysprosium(III), tris[N,N‑bis(trimethylsilyl)amine]erbium rare earth organometallic compound, catalytic Active center component precursor common transition metal organic compound ferrous fumarate, nickel citrate, copper glutamate and noble metal compound terpyridyl ruthenium chloride hexahydrate, in emulsifier dimethylaminoethanol laurate chloroacetic acid The hydrothermal reaction is carried out under the action of ammonium, and the reaction product is dried to remove moisture, and burned at a certain temperature in a muffle furnace to obtain a solid catalyst for ozone heterogeneous oxidation.

The invention relates to a preparation method of an ozone heterogeneous oxidation solid catalyst and belongs to the technical field of environment-friendly and chemical engineering catalysts. The preparation method comprises the following steps: by taking medical stones, wollastonite, metaaluminium hydroxide, phosphorite, montmorillonite and sylvinite as carriers, after chambering and modifying the carriers through lithium hypochlorite and di(acetylacetone) beryllium, adding a surfactant, octadecyl trimethyl ammonium chloride, for surface activating treatment under the action of ultrasonic waves; then causing the carriers to generate hydrothermal reaction with borax and potassium sulfate which serve as compound mineralizers, isoproscandium oxide (III), tri(2,2,6,6-tetramethyl-3,5- heptylic diketone acid) gadolinium, tri[N,N-bis(trimethyl silane) amine] erbium and tri(trifluoromethane sulfimide) ytterbium which serve as catalytic active auxiliary agent precursors, and a titanocene ring substituted salicylic acid complex, zinc lactate, terpyridyl ruthenium chloride hexahydrate and iridic tetrachloride dihydrate which serve as catalytic active central compound precursors in a hydrothermal reaction kettle under the action of an emulsifier, trimethylamine glycolate stearate ammonium iodide, drying a reaction product to remove water, and firing the reaction product in a muffle furnace to obtain the ozone heterogeneous oxidation solid catalyst.