87results about "Magnesium sulfates" patented technology

The invention belongs to the technical field of waste battery recovery, and particularly relates to a short-process method for recovering battery-grade lithium carbonate and valuable metals from waste ternary lithium battery black powder. According to the method, a lithium closed-loop technical system of blank roasting, cyclic leaching, synergistic impurity removal, lithium phosphate aluminum removal, directional extraction and split-flow extraction of lithium, nickel and magnesium and seed crystal induction parallel flow lithium precipitation is constructed, a roasting aid, a reducing agent and an aluminum removal agent do not need to be added in the whole process, and the redundant processes of traditional lithium carbonate purification such as carbonization, resin purification and pyrolysis are omitted; the lithium liquid concentration cost is saved, no hazardous waste exists, green and clean production is achieved, and the quality of battery-grade products is guaranteed through collaborative impurity removal and directional extraction.

A recovery system for preparing magnesium sulfate using sulfuric acid waste liquid is provided. [Solution] The recovery system for preparing magnesium sulfate using sulfuric acid waste liquor according to the present invention comprises a reactor 1, a crystallizer 3, a dehydrator 4, and a dryer 5. The reactor 1 removes hydrogen peroxide from the sulfuric acid waste liquor and produces a magnesium sulfate solution. The crystallizer 3 continuously recrystallizes the magnesium sulfate solution by lowering its temperature, obtaining magnesium sulfate crystals and their mother liquor. The dehydrator 4 removes the mother liquor, and the dryer 5 dries the solution at different temperatures to obtain magnesium sulfate hydrates containing different amounts of water of crystallization.

The present invention relates to a process for producing salts from brine obtained from the desalination of seawater. The process can also make it possible to selectively recover NaCl, CaSO4, kainite, carnallite, magnesium sulfate, struvite, newberyite, or potassium bitartrate.

The application provides a method for separating magnesium and lithium in brine, comprising the following steps: pretreating the brine to obtain pretreated brine; performing primary nanofiltration, secondary nanofiltration and reverse osmosis concentration on the pretreated brine; the nanofiltration membrane selected for the primary nanofiltration is a carboxylated MOF modified nanofiltration membrane; and the raw materials for preparing the carboxylated modified nanofiltration membrane comprise a support, piperazine, carboxylated ZiF-8 and carboxylated Uio-66. The application reduces the risk of nanofiltration membrane pollution by pretreating the brine, pumps the pretreated brine into a nanofiltration system, generates a cut-off liquid rich in magnesium and sulfate ions and a high-lithium permeate liquid, performs secondary nanofiltration on the cut-off liquid to recover lithium, the secondary cut-off liquid can be used as a resource, the permeate liquid enters a reverse osmosis membrane, the lithium content is concentrated, the concentrated lithium liquid enters a lithium precipitation process, and the method for separating magnesium and lithium in the nanofiltration process realizes the impurity removal process for lithium recovery.

The application belongs to the technical field of wastewater treatment, and particularly relates to a method for separating inorganic salts in a sodium-magnesium sulfate mixed solution. A magnesium salt with relatively large solubility is added to a feed liquid containing sodium-magnesium sulfate, and magnesium sulfate heptahydrate is precipitated at normal temperature and low temperature, respectively, and sodium salt is precipitated at high temperature in the heating and evaporation process, thereby forming a continuous zero-emission disposal sodium-magnesium sulfate separation process. The process has strong universality, is suitable for an aqueous solution system with a mass ratio of magnesium sulfate to sodium sulfate of 1-4, has zero emission in the process, does not pollute the environment, and is an environmentally friendly new technology for separating sodium-magnesium sulfate.

The application provides a magnesium sulfate solution impurity removal device, and belongs to the technical field of magnesium sulfate production. The device comprises an impurity removal box body, a driving assembly, filter cartridges, a flushing assembly, a pushing assembly, a collecting assembly and a lifting assembly. The filter cartridges are arranged in groups, and are annularly distributed inside the impurity removal box body. The filter cartridges are sequentially attached to each other. Filter holes are evenly arranged on the cylinder body of each group of filter cartridges. The flushing assembly is arranged above the filter cartridges. The collecting assembly is arranged below the filter cartridges and corresponds to the flushing assembly. The lifting assembly is arranged at the bottom of the inside of the impurity removal box body. Compared with the prior art, the magnesium sulfate solution can be automatically and on-line cleaned and collected when the magnesium sulfate solution is filtered and impurities are removed, thereby improving the filtering and impurity removal efficiency of the magnesium sulfate solution.

According to the technical scheme, the method is characterized by comprising the following steps: S1, pretreatment of the extraction liquid: mixing saline water containing target solute magnesium sulfate with a tributyl phosphate extraction agent according to a volume ratio of 1: (0.8-1.2), and stirring and extracting at 35-45 DEG C for 20-30 minutes to form the extraction liquid; 0.5 wt%-1.2 wt% of a dielectric conditioning agent is added into the extraction agent; s2, gradient cooling crystallization: adopting a three-stage cooling process; s3, solid-liquid separation and solvent recovery; crystal growth lasts for 20-30 minutes; and S4, intelligent temperature control feedback. Compared with a traditional evaporation method, the technology has the advantages that the concentration period is shortened by 30-40%, and the unit energy consumption is reduced by 25-30. By utilizing the process, the purity can be improved: the purity of a target solute is improved from 96.5% in the prior art to 99.2% or above, and the impurity content is reduced by 60% or above. Crystal growth lasts for 20-30 minutes; economic optimization can be realized by utilizing the process.

The utility model relates to the technical field of waste resin regeneration, and particularly provides a co-production device for preparing activated carbon from waste resin and recycling waste sulfuric acid, which comprises a resin activation system and a sulfuric acid regeneration system. The method has the beneficial effects that a novel method for preparing the activated carbon from the waste resin is provided; a sulfuric acid regeneration system is matched, so that heat energy and sulfur-containing gas generated during preparation of the waste resin are effectively utilized; low-quality acid generated in the sulfuric acid regeneration process is fully utilized through a matched salt manufacturing system. And no acid gas is discharged in the whole process.

The application provides a recycling method of laterite nickel ore hydrometallurgy wastewater, which comprises the following steps: the laterite nickel ore is sequentially subjected to high-pressure acid leaching, cyclic leaching, CCD washing, iron and aluminum removal treatment, MHP precipitation treatment and manganese precipitation treatment to obtain post-manganese precipitation wastewater; the post-manganese precipitation wastewater is subjected to ion exchange to obtain post-ion exchange liquid and nickel and cobalt enriched solution; the nickel and cobalt enriched solution is recycled to the CCD washing; the post-ion exchange liquid is subjected to magnesium separation to obtain magnesium rich liquid and magnesium poor liquid; the magnesium rich liquid is recycled to the MHP precipitation treatment, and / or the magnesium rich liquid is subjected to crystallization to obtain magnesium sulfate product; the magnesium poor liquid is subjected to bipolar membrane electrolysis to obtain sodium hydroxide solution and sulfuric acid solution; the sodium hydroxide solution is recycled to the iron and aluminum removal treatment, and the sulfuric acid solution is recycled to the cyclic leaching. The application can realize full utilization of wastewater resources, is green, environmentally friendly and economical, and has wide application prospect.

The utility model relates to the technical field of magnesium sulfate purification equipment, in particular to a continuous extraction type magnesium sulfate calcium removal device, which is provided with an extraction device and a water bath device, removes calcium from magnesium sulfate in an anhydrous alcohol continuous extraction manner, and reduces the requirement on a reaction container and the production risk. Comprising a body; the extraction device, the water bath device, the water replenishing device and the extraction device are all mounted on the machine body, and the guide-out device is mounted on the extraction device; the machine body provides support, the extraction device performs continuous extraction on magnesium sulfate, the water bath device performs water bath heating on the extraction device, the water supplementing device supplements water to the water bath device, the extraction device extracts magnesium sulfate in alcohol, and the guiding device is convenient for discharging residual calcium impurities in the extraction device.

The invention discloses a method and a system for purifying a magnesium sulfate solution. The method comprises the following steps: pretreating a magnesium sulfate solution containing nickel and cobalt impurities to remove suspended matters and organic matters in the magnesium sulfate solution; adding sodium hydrosulfide into the pretreated magnesium sulfate solution, enabling nickel and cobalt to respectively react with the sodium hydrosulfide to generate precipitates, and carrying out solid-liquid separation to obtain the purified magnesium sulfate solution and precipitates containing nickel sulfide and cobalt sulfide; evaporating and crystallizing the purified magnesium sulfate solution to obtain magnesium sulfate crystals, and drying to obtain a magnesium sulfate product; and carrying out post-treatment on the precipitate containing the nickel sulfide and the cobalt sulfide, and recovering nickel and cobalt in the precipitate. The method can efficiently remove nickel and cobalt impurities in the magnesium sulfate solution, has the advantages of high efficiency, environmental protection, recoverable resources and the like, and can reduce the production cost and improve the resource utilization rate.

The invention discloses a magnesium sulfate separation and refining purification method, which belongs to the technical field of comprehensive utilization of sea brine, and comprises the following steps: (1) uniformly mixing a solid mixture containing magnesium sulfate and sodium chloride obtained by evaporating bittern with a dissolving solution according to a weight ratio of 0.8: (1-1.5) at 60-100 DEG C to obtain a mixed suspension, and controlling the solid-to-liquid ratio of the mixed suspension to be 40-60%; (2) pumping the 60-100 DEG C mixed suspension into a cone flange centrifuge, discharging magnesium sulfate and mother liquor with the particle size smaller than the aperture of a screen from a liquid outlet after penetrating through the screen to obtain crude magnesium milk, throwing out sodium chloride with the particle size larger than the aperture of the screen from a large section of a conical rotary drum, and discharging from a solid material port to obtain crude salt; (3) performing secondary centrifugal separation on the crude salt to obtain refined salt with the water content reduced to 20-30% and mother liquor; and (4) continuously carrying out three-stage centrifugal separation on the crude magnesium milk obtained in the step (2) at 60-100 DEG C to obtain magnesium sulfate slurry, and reducing the water content of the magnesium sulfate slurry to 20-30% to obtain the magnesium milk. According to the method, the content of MgSO4 in the magnesium sulfate monohydrate product can be effectively increased, and the content of NaCl can be reduced.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an emission reduction method for disperse dye production wastewater. The method comprises the following steps: neutralizing disperse dye mother liquor with industrial magnesium oxide, magnesium hydroxide or magnesium carbonate, and filtering to obtain clarified and neutralized mother liquor containing magnesium sulfate; using the neutralized mother liquor for diluting the disperse dye coupling completion material, then heating for crystal transformation, filtering and washing to obtain a dye filter cake and a salt-containing acidic mother liquor; and neutralizing the salt-containing acidic mother liquor with a magnesium compound, and filtering to obtain a clarified and neutralized mother liquor. And carrying out multiple-effect evaporation concentration and crystallization on the neutralized mother liquor exceeding the recycling amount to extract magnesium sulfate, and using evaporation condensate water for washing a disperse dye filter cake. The neutralization mother liquor is used for replacing clear water to dilute the disperse dye coupling completion material, the viscosity and acidity problems in disperse dye synthesis are solved, the product quality and yield are not affected, the mother liquor is reduced, the water consumption is reduced, meanwhile, the salt concentration of the neutralization mother liquor is increased, and the wastewater evaporation crystallization energy consumption is reduced.

The application provides a method for recycling electrolytic manganese industry waste salt, comprising the following steps: mixing the electrolytic manganese industry waste salt with calcium oxide, then performing first heat treatment and second heat treatment to obtain a treatment product; performing water immersion and solid-liquid separation on the treatment product to obtain first leaching residue and first leaching solution; performing evaporation crystallization on the first leaching solution to obtain a magnesium sulfate product; mixing the first leaching residue with ammonium sulfate and performing ball milling to obtain a mixture; performing calcination on the mixture to obtain a calcination product; performing water immersion on the calcination product to obtain second leaching residue and second leaching solution; performing evaporation crystallization on the second leaching solution to obtain a manganese sulfate product; performing water washing, solid-liquid separation and drying on the second leaching residue to obtain industrial gypsum. The method has the advantages of simple process, mild process conditions, low energy consumption, low cost, elimination of environmental pressure of electrolytic manganese industry waste salt stockpiling, and efficient recovery of Mg, Mn, NH4 + / NH3 and S resources in the electrolytic manganese industry waste salt and recovery of Ca, and the purity of the recovered manganese sulfate reaches the battery grade.

The present invention relates to amorphous silica comprising particles of amorphous silica with a D50 of from 5 µm to 30 µm. The present invention also relates to a method of producing amorphous silica and metal salts, the method comprising mixing olivine, water and acid in a first vessel and reacting the olivine with the acid to produce amorphous silica.

The invention provides a magnesium sulfate solution impurity removal device, and belongs to the technical field of magnesium sulfate production, the magnesium sulfate solution impurity removal device comprises an impurity removal box body, a driving assembly, a plurality of groups of filter cartridges, a flushing assembly, a pushing assembly, a collecting assembly and a lifting assembly, and the plurality of groups of filter cartridges are annularly distributed in the impurity removal box body; the plurality of filter cartridges are sequentially attached, a plurality of uniformly distributed filter holes are formed in the cartridge body of each group of filter cartridges, the flushing assembly is arranged above the plurality of filter cartridges, and the collecting assembly is arranged below the plurality of filter cartridges and corresponds to the flushing assembly. The lifting assembly is arranged at the bottom of the inner side of the impurity removal box. Compared with the prior art, according to the embodiment of the invention, when the magnesium sulfate solution is subjected to filtration and impurity removal, the impurities on the filter cartridge can be automatically cleaned and collected online, so that the filtration and impurity removal efficiency of the magnesium sulfate solution is improved.

The present invention discloses a method for producing magnesium sulfate monohydrate and potassium magnesium sulfate fertilizer by producing bittern from seawater. The present invention is directed to the bittern component of seawater and combines Na + , K + Mg 2+ 、Cl ‑ 、SO4 2‑ The invention realizes the comprehensive utilization of seawater salt brine and the simultaneous preparation of magnesium sulfate monohydrate and potassium magnesium sulfate fertilizer. In addition, K in seawater salt brine is used to produce magnesium sulfate monohydrate and potassium magnesium sulfate fertilizer. + Mg 2+ and SO4 2‑ The recovery rates were all above 80%.

The invention provides a method for separating magnesium and lithium in brine, which comprises the following steps: pretreating the brine to prepare pretreated brine; carrying out primary nanofiltration, secondary nanofiltration and reverse osmosis concentration on the pretreated brine; a nanofiltration membrane selected by the first-stage nanofiltration is a carboxylated MOF (Metal Organic Framework) modified nanofiltration membrane; the carboxylation modified nanofiltration membrane is prepared from the following raw materials: a support body, piperazine, carboxylation ZiF-8 and carboxylation Uio-66. According to the method, brine is pretreated, so that the risk of pollution of the brine to a nanofiltration membrane is reduced, the pretreated brine is pumped into a nanofiltration system, and trapped fluid enriched with magnesium and sulfate ions and high-lithium permeate liquid are generated; the trapped fluid is subjected to secondary nanofiltration to recover lithium, the secondary trapped fluid can be subjected to resource utilization, the permeate liquid enters a reverse osmosis membrane to concentrate the lithium content, and the concentrated lithium liquid enters a lithium precipitation process; magnesium and lithium are separated in the nanofiltration process, and meanwhile, the impurity removal process of lithium recovery is realized.

This invention discloses a method for preparing a bimetallic composite catalytic material and its application. The invention first obtains a bimetallic composite catalytic material by combining two transition metal elements, and then uses it to catalyze the oxidation of sulfite, achieving an oxidation rate of over 90%. Compared with non-catalytic oxidation, the oxidation efficiency of sulfite using the bimetallic composite catalytic material in this invention is increased by 20-35 times.

The invention belongs to the technical field of chemical hazardous waste resourceful treatment, and relates to a treatment method and a treatment system for waste acid generated in an acetylene cleaning process in BDO production. The treatment method comprises the following steps: (1) adding magnesium oxide into the waste acid to neutralize part of sulfuric acid; (2) further adding calcium hydroxide into the waste acid until the pH value of the system is neutral, and carrying out solid-liquid separation to obtain a neutralized solution and a slag phase containing heavy metals and arsenic; (3) carrying out oxidation reaction on the neutralization solution and ozone under the catalysis of a catalyst, then carrying out vulcanization reaction on the neutralization solution and a sodium sulfide solution, filtering a reaction product to obtain filtrate, and crystallizing the filtrate to obtain MgSO4. 7H2O; and (4) mixing the slag phase with sodium tetraborate decahydrate, carrying out a hydrothermal reaction, and drying the product to obtain the Mg5Ca3B2O12 flame-retardant material. According to the treatment method and system, the recycling rate is high, the treatment cost is low, the economic value is high, the environment is protected, the technological process is easier to control, and the high-concentration waste acid generated in the acetylene cleaning procedure is treated.

The present invention relates to a method for increasing the yield of magnesium oxide in a manufacturing process producing essentially magnesium oxide through the valorisation of magnesium-containing waste, wherein the method comprises the steps of: providing acid-generating microorganisms selected from the group of acidophilic microorganisms; providing a first stream comprising sulphur; allowing the microorganisms to interact with the sulphur comprised in the first stream thereby promoting the conversion of the sulphur to form sulphuric acid; providing a second stream comprising magnesium from the manufacturing process producing essentially magnesium oxide; allowing the formed sulphuric acid to react with magnesium in the stream comprising magnesium to form solubilised magnesium sulphate; providing oxalic acid and allowing the oxalic acid to react with the formed solubilised magnesium sulphate to form magnesium oxalate as a precipitate; collecting the formed magnesium oxalate precipitate; and transferring the collected magnesium oxalate precipitate to the manufacturing process producing essentially magnesium oxide, wherein the magnesium oxalate is calcinated to magnesium oxide and thereby increasing the yield of magnesium oxide in the manufacturing process producing essentially magnesium oxide. The present invention also relates to a system using said method.

The invention provides a seawater concentrated water resource regeneration treatment method based on plate nanofiltration, which comprises the following steps of: after concentrated seawater is subjected to plate nanofiltration, settling and separating the concentrated water to obtain gypsum, and extracting the gypsum to obtain mother liquor; the mother liquor after gypsum extraction is subjected to bromine extraction to obtain a bromine product and mother liquor after bromine extraction, the mother liquor after bromine extraction is adjusted to be neutral and subjected to multiple-effect evaporation to obtain condensate water and evaporation mother liquor, the former is partially fed into an external coil pipe of a reaction settler for heat exchange, and the latter is subjected to heat preservation and sedimentation to obtain high-temperature salt slurry and clarified liquor; separating high-temperature salt slurry to obtain magnesium milk and sodium chloride, processing the magnesium milk into a magnesium sulfate monohydrate product, washing the sodium chloride to obtain bitter salt, and feeding part of the bitter salt into concentrated seawater; cooling and crystallizing the clarified liquor to obtain carnallite and mother liquor after carnallite is separated out, washing the carnallite to obtain a potassium chloride product and decomposition washing mother liquor, mixing one part of the two mother liquor with the mother liquor after bromine extraction, feeding the other part of the two mother liquor, condensate water and bitter salt into a magnesium preparation mother liquor pool, and adding caustic soda to obtain a magnesium hydroxide product. According to the method, valuable components in the concentrated seawater can be subjected to resource maximization extraction.

The present invention provides a multi-stage solvent extraction process for selectively extracting cobalt from an aqueous mixed metal solution comprising nickel and cobalt, whereby each solvent extraction stage is characterized by maintaining a magnesium concentration in an aqueous phase above a predetermined magnesium concentration.

The invention discloses a method and a device for preparing an aqueous proton battery electrolyte based on a magnesium method flue gas desulfurization byproduct and an aqueous proton battery. The method comprises the following steps: carrying out oxidation treatment and impurity removal treatment on the magnesium-method flue gas desulfurization byproduct to obtain a high-purity magnesium sulfate solution; and mixing the high-purity magnesium sulfate solution and the sulfuric acid solution to obtain the aqueous proton battery electrolyte. According to the method, the magnesium-method flue gas desulfurization by-products are directly used for preparing the aqueous proton battery electrolyte after being oxidized and subjected to impurity removal, so that the problems of accumulation and treatment of the magnesium-method flue gas desulfurization by-products are solved, the solid waste treatment cost is reduced, and resource recycling is realized; the preparation process disclosed by the invention is low in energy consumption, greatly reduces the production cost of the electrolyte, and is environment-friendly. Compared with the traditional pure sulfuric acid electrolyte, the electrolyte prepared by the invention can obviously improve the cycle performance of the water-based proton battery, greatly enhance the rate capability, meet the high-power requirement, and realize double breakthrough of high-value utilization of solid wastes and high-performance water-based proton batteries.

The utility model belongs to solid waste resource utilization technical field especially relates to a kind of production system for preparing high-purity magnesium sulfate with solid waste magnesite slurry, it is characterized in that, including solid waste pretreatment unit, reaction kettle, separation unit, drying unit and circulation unit, solid waste pretreatment unit includes crusher and bunker, reaction kettle is lined with enamel, with frequency conversion stirrer and temperature controller, reaction kettle is connected with high-position sulfuric acid tank outlet, high-position sulfuric acid tank is connected with sulfuric acid batching tank by pipeline, sulfuric acid pump, separation unit includes first stage electric centrifuge and second stage electric centrifuge, two-stage electric centrifuge between magnesium sulfate tank and crystallization tank are equipped, circulation unit includes PE mother liquor tank and mother liquor pump, final product is magnesium sulfate heptahydrate or anhydrous magnesium sulfate with water content≤0.5%.The utility model has the advantages that:low-activity solid waste magnesite slurry is converted into >99% purity magnesium sulfate, realizes solid waste high-value utilization conversion, and "zero" wastewater discharge is achieved in whole process.

The invention discloses a waste liquid treatment method for preparing O-methylisourea hydrogen sulfate by a urea method, which aims at overcoming the defects of an organic acid-containing waste liquid treatment method which is high in organic matter content, low in moisture content, high in acid content, high in temperature and explosive, adopts a combined treatment method of alkali and a dispersing agent, and gasifies the dispersing agent through heat generated in a neutralization process; according to the present invention, the heat in the whole reaction process is removed so as to ensure the safety of the reaction process, and the presence of the dispersant reduces the viscosity of the system, simplifies the by-product preparation steps, improves the by-product quality, has advantages of high resource utilization rate, low equipment requirement, low waste liquid component requirement, and effective hazardous waste amount reduction; meanwhile, the dispersing agent can be repeatedly used, the treatment method is simple, the treatment time is short, the treatment efficiency is high, and the method has good environmental benefits and is suitable for large-scale popularization and application.

The utility model relates to the technical fields of chemical industry machinery, in particular to a kind of preparation device of large particle magnesium sulfate heptahydrate, it not only can to magnesium sulfate heptahydrate crystallization, but also can separate out after crystallization magnesium sulfate heptahydrate in solution, it is convenient to use, and labor intensity is low, and practicality is high;Including bottom plate, support and crystallizing cylinder, support is fixedly installed on bottom plate, crystallizing cylinder is fixedly installed in the right part of support, chamber is provided in crystallizing cylinder, the upper end of crystallizing cylinder is set as opening, a plurality of refrigerating plates are provided on crystallizing cylinder, the refrigeration end of multiple refrigerating plates is embedded into the inner side wall of crystallizing cylinder, and the heat dissipation end of refrigerating plate is located at the outside of crystallizing cylinder;It also includes hydraulic cylinder, push rod, filter plate, concentration mechanism, conveying mechanism, stirring mechanism and moving mechanism, hydraulic cylinder is fixedly installed on bottom plate upper end, push rod is slidably installed on crystallizing cylinder, the lower end of push rod is connected with the output end of hydraulic cylinder, and filter plate is fixedly installed on the upper end of push rod.

The utility model relates to the technical field of filtering, in particular to a continuous filtering device for magnesium sulfate heptahydrate, which can be used for filtering while collecting magnesium sulfate heptahydrate crystals, ensures the filtering continuity, and is convenient to use, high in working efficiency and high in practicability. Comprising a baseplate; the device comprises a bottom plate, and further comprises a support A, a support B, a driving roller, a driven roller, a conveying belt, a driving motor, a collecting box, a moving mechanism and a conveying mechanism, the moving mechanism is installed on the left portion of the upper end of the bottom plate, the support A is installed on the moving mechanism, the moving mechanism is used for moving the support A left and right, and the support B is installed on the right portion of the upper end of the bottom plate; the driving roller and the driven roller are rotationally installed on the support A and the support B respectively, the conveying belt wraps the driving roller and the driven roller, multiple sets of vertically-communicated filtering holes are formed in the conveying belt, filtering cloth is arranged on the conveying belt, the driving motor is fixedly installed on the support A, and the output end of the driving motor is connected with the driving roller.

The present application relates to a kind of preparation methods of high solubility seawater crystal, comprising the following steps: S1, the sodium chloride of predetermined proportion is mixed with calcium chloride, obtain sodium chloride-calcium chloride premix, wherein calcium chloride is screened before mixing Processed;S2, the magnesium chloride of predetermined proportion, magnesium sulfate and potassium chloride are mixed and stirred, then sodium chloride-calcium chloride premix is added, and seawater crystal is prepared after being mixed uniformly.The method can reduce the adhesion of magnesium sulfate and calcium chloride, reduce the generation of insoluble calcium sulfate, solve the existing seawater crystal dissolution problem from the root, effectively improve the solubility of seawater crystal, speed up the dissolution rate, make the ion release more uniform, solve the problem of insufficient dissolution, easy to block, the dissolution effect of finished product is better than prior art.