55 results about "Lithium sulfate" patented technology

The invention relates to a method for simultaneously preparing lithium hydroxide and sulfuric acid. The invention provides a method for simultaneously preparing lithium hydroxide and sulfuric acid, which comprises the following steps: preparing a bipolar membrane electrodialysis device which comprises a first bipolar membrane, an anion exchange membrane, a cation exchange membrane and a second bipolar membrane, and forming an acid chamber between the first bipolar membrane and the anion exchange membrane, a salt chamber is formed between the anion exchange membrane and the cation exchange membrane, and an alkali chamber is formed between the cation exchange membrane and the second bipolar membrane; a lithium sulfate aqueous solution is added into a salt chamber of the bipolar membrane electrodialysis device, a sulfuric acid aqueous solution is added into an acid chamber, and a lithium hydroxide aqueous solution is added into an alkali chamber; and discharging the desalted solution formed in the salt chamber of the bipolar membrane electrodialysis device, discharging the sulfuric acid aqueous solution formed in the acid chamber, and discharging the lithium hydroxide aqueous solution formed in the alkali chamber.

The invention discloses a method for recovering high-purity fluorine and silicon from fluorine-silicon slag and co-producing a low-alkali fluorine-free accelerator, which comprises the following steps: S1, dissolving the fluorine-silicon slag in a sodium hydroxide solution to obtain a solution A; s2, adding dilute sulphuric acid into the solution A, reacting until gel is obtained, and filtering to obtain filtrate A and high-purity silicon dioxide gel; s3, adding calcium sulfate and EDTA (Ethylene Diamine Tetraacetic Acid) into the filtrate A, stirring and reacting, and filtering after the reaction is finished to obtain calcium fluoride and filtrate B; and S4, taking clear water, heating, carrying out heat preservation, then adding aluminum sulfate, lithium sulfate, diethanol amine and the filtrate B obtained in S3, continuously stirring until the aluminum sulfate is completely dissolved, then adding hydrated magnesium silicate, continuously carrying out heat preservation stirring, and obtaining the low-alkali fluorine-free accelerator after stirring is finished. The method is simple in process and easy to implement industrially, and fluoride and silicon oxide obtained through separation are high in purity and beneficial to follow-up extension application; more importantly, high-value recycling of the fluorosilicon slag is achieved, and the problems of stockpiling waste and environmental pollution of the fluorosilicon slag are solved.

The application discloses a purification and dissolution-resisting production method of battery-grade lithium carbonate, which comprises the following steps: 1) primary purification: cooling and cold precipitation of a crude lithium sulfate solution to obtain a primary purified solution; 2) secondary purification: adjusting the pH with sodium hydroxide, adding a flocculating agent, and filtering to obtain a secondary purified solution; 3) tertiary purification: adjusting the pH with sulfuric acid, sequentially adding disodium ethylenediaminetetraacetate, oxalic acid and activated carbon, and filtering to obtain a tertiary purified solution; 4) carbonization and synthesis: determining the content of Li in the tertiary purified solution, adding solid Na2CO3 or Na2CO3 solution according to the content of Li, and reacting for 30 min; adding dodecyl primary amine and reacting for 30 min, and filtering to obtain crude lithium carbonate; 5) washing: washing twice with water, washing with ethanol, filtering and drying to obtain battery-grade lithium carbonate; and 6) mother liquor recovery. The battery-grade lithium carbonate produced has a purity higher than 99.95%, a yield higher than 99%, and a whiteness higher than 95%, and realizes safe and environment-friendly production with high purity, high yield and high whiteness.

The application relates to the technical field of lithium hydroxide production, and discloses a processing technology for preparing battery-grade lithium hydroxide, which comprises the following steps: lithium ore is crushed to a reasonable particle size and then is sent into a roasting furnace, lithium ore is destroyed through high-temperature roasting, the roasted ore clinker is sent into a reaction kettle, sulfuric acid solution is added to carry out acidification reaction, then water is added to carry out leaching, and a crude leaching solution containing lithium sulfate is obtained. The application is provided with a sealing element, the large contact area design of the L-shaped sealing strip improves the reliability of the primary sealing, the cooperation of the elastic pressing strip and the spring can effectively compensate for the slight deformation in the equipment operation process, the stability of the sealing performance is ensured, the double-sealing structure can effectively prevent the leakage of the heat exchange medium, the problems of resource waste, environmental pollution and equipment damage caused by medium leakage are avoided, the influence of cross contamination of different media on product quality is also avoided.

The invention discloses a method for extracting lithium sulfate from high-iron spodumene concentrate, which comprises the following steps: mixing high-iron spodumene concentrate, sulfate and carbonate, and processing to obtain powder; the mass ratio of the high-iron spodumene concentrate to the sulfate to the carbonate is 1: (0.3-0.8): (0.01-0.5); the powder is subjected to brick pressing forming, a powder green brick is obtained, and the powder green brick is dried and roasted at the temperature of 900-1050 DEG C; cooling and crushing the roasted powder green brick to obtain a roasted particle material; adding water into the roasted particle material, carrying out ball milling, and leaching to obtain a leaching solution and leaching residues; and carrying out purification and concentration treatment on the leachate to obtain the lithium sulfate. By implementing the method, the interference of iron impurities can be eliminated, and the cost is reduced while the lithium recovery rate is improved.

The invention discloses a lithium salt crystallization method, which adopts a lithium precipitation kettle with two layers of ultrasonic generators arranged at diagonal positions in a kettle body, and comprises the following steps: starting the ultrasonic generators, and adjusting the ultrasonic frequency to be 20-150KHz; adding sodium carbonate and a lithium sulfate solution into the lithium precipitation kettle by adopting an inverse addition method; continuously carrying out ultrasonic reaction for 2-4 hours, and turning off the ultrasonic generator; and carrying out solid-liquid separation to obtain lithium carbonate. According to the invention, the scaling phenomenon in the reaction kettle can be basically eliminated completely, and scale blocks do not need to be cleaned manually; the content of impurities in the lithium salt is reduced: the content of sulfate radicals is reduced to 0.07% or below from 0.08% in the prior art and can be reduced to 0.045%, and the content of sodium ions is reduced to 0.02% or below from 0.025% in the prior art and can be reduced to 0.01% or below; and the particle size of the lithium salt crystal particles is reduced from the average particle size of 25-40 microns in the existing process to 3-20 microns in the process disclosed by the invention, and the appearance of the particles is more uniform.

The present invention relates to a bipolar electrodialysis apparatus for producing lithium hydroxide and sulfuric acid from a lithium sulfate solution. A bipolar electrodialysis apparatus (100) for producing lithium hydroxide and sulfuric acid from lithium sulfate comprises: a positive electrode (20) and a negative electrode (30) that face each other; a first bipolar film (40), an anion-selective dialysis film (60), a cation-selective dialysis film (70), and a second bipolar film (50) that are disposed between the positive electrode (20) and the negative electrode (30); and a porous first nickel foam (80) disposed on the plane of the positive electrode (20) to be in close contact with each other and a porous second nickel foam (90) disposed on the plane of the negative electrode (30) to be in close contact with each other, wherein the nickel foams (80, 90) have a porosity of 50-90%.

The application discloses a lithium extraction method and equipment, and aims at solving the technical problems of long process and serious environmental pollution in the sulfuric acid method. The method comprises the following steps: through mixing a first material with a sulfate ion-based acidifying agent to perform a sulfation reaction, the first material is converted into a second material containing lithium sulfate, the first material contains a lithium-based compound, and the lithium sulfate is obtained from the lithium-based compound through the sulfation reaction; after or at the same time of converting the first material into the second material containing lithium sulfate by mixing the first material with the sulfate ion-based acidifying agent to perform the sulfation reaction, the second material is calcined to fully perform the sulfation reaction and remove the sulfate ion-based acidifying agent which is not completely reacted; the lithium sulfate in the second material is gasified and volatilized from the second solid phase material by heating the second material, and the solid phase material remaining after the lithium sulfate in the second material is gasified and volatilized is a third material.

The invention discloses a method for removing fluorine from a lithium salt solution, and particularly relates to the technical field of lithium salt solution impurity removal, and the method comprises the following steps: S1, adding sodium hydroxide or lithium hydroxide into lithium salt solutions such as lithium sulfate and lithium chloride to adjust the lithium salt solutions to be alkaline, so that the lithium hydroxide solution can be directly used; s2, adding calcium hydrogen phosphate into the alkaline lithium salt solution, stirring, and filtering to obtain a low-fluorine lithium salt solution; compared with the prior art, the calcium hydrophosphate is innovatively selected as the fluorine removal agent for the lithium salt solution, the fluorine-removed lithium salt solution is obtained by adding the calcium hydrophosphate into the alkaline lithium salt solution, controlling the reaction time and filtering, the fluorine content of the fluorine-removed lithium salt solution is lower than 5 mg / L, the fluorine ion removal effect is good, and corrosion of fluorine ions to equipment is avoided.

The invention provides a method for removing impurities from a lithium sulfate strip liquor, a lithium sulfate solution, a lithium-containing compound and application. The method comprises the following steps: firstly, mixing a lithium sulfate strip liquor, a first impurity removal agent and a second impurity removal agent to obtain a mixed solution; the pH value of the mixed solution is adjusted to be acidic for the first time, a first filtrate and a first filter residue are obtained after the first reaction, the first impurity removing agent comprises a vulcanizing agent, and the second impurity removing agent comprises a calcium removing agent; the pH value of the first filtrate is adjusted to be alkaline for the second time, and second filtrate and second filter residues are obtained after the second reaction; and further treating the second filtrate to obtain a purified lithium sulfate solution. According to the impurity removal method provided by the invention, the concentration of divalent cation impurities such as copper, iron, calcium and magnesium in the lithium sulfate strip liquor can be greatly reduced, so that the purified lithium sulfate solution can meet the process requirements of a bipolar membrane system for preparing a lithium-containing product, and the large-scale production of the high-purity and high-efficiency lithium-containing product is realized.

The invention discloses a method for extracting lithium sulfate from spodumene concentrate, which comprises the following steps: mixing spodumene concentrate and auxiliary materials, and processing to obtain powder; the auxiliary materials comprise a first auxiliary material and a second auxiliary material, the first auxiliary material is lithium-containing tail mud, and the second auxiliary material is sulfate and / or carbonate; the powder is subjected to brick pressing forming, a powder green brick is obtained, and the powder green brick is dried and roasted at the temperature of 900-1050 DEG C; the roasted powder green bricks are crushed, and roasted particle materials are obtained; adding water into the roasted particle material, carrying out ball milling, and leaching to obtain a leaching solution and leaching residues; and carrying out purification and concentration treatment on the leachate to obtain the lithium sulfate. By implementing the method, base plate-free direct roasting can be realized, and the cost is reduced while the lithium recovery rate is improved.

Provided is a method for purifying a lithium sulfate solution, comprising the steps of: leaching a lithium-containing ore with sulfuric acid to obtain a lithium sulfate solution mixed with a leach residue; adding an alkaline supplementary material to the lithium sulfate solution mixed with the leach residue to form a magnesium precipitate; and removing the magnesium precipitate and the leach residue by solid-liquid separation, wherein the step of forming the magnesium precipitate is performed at a pH higher than the isoelectric point of the magnesium precipitate and lower than the isoelectric point of the leach residue.

The invention discloses a method for preparing small-particle high-purity lithium phosphate by recovering waste lithium iron phosphate battery powder through a sodium method, which comprises the following steps: pulping the waste lithium iron phosphate battery powder, adding sulfuric acid and an oxidizing agent, reacting, and filtering to obtain an impurity-containing lithium sulfate solution and ferrophosphorus slag; adding caustic soda liquid to adjust the pH value of the impurity-containing lithium sulfate solution, adding sodium phosphate, and filtering to obtain an impurity-removed solution; removing fluorine, calcium and magnesium from the impurity-removed liquid to obtain a lithium sulfate solution, and evaporating and concentrating to obtain a concentrated lithium sulfate solution; and finally, adding the concentrated lithium sulfate solution into the sodium phosphate solution within 0.5-1 hour, and reacting at 60-70 DEG C for 1-2 hours to prepare the lithium phosphate with the particle size of 1-2 microns. According to the recovery method, the high-purity lithium phosphate product can be recovered and prepared, and the recovery rate is high; meanwhile, lithium phosphate with small particle size (the particle size is mainly distributed between 1-2 microns) can be prepared based on the method.

The present invention provides an optimized method for recovering high-purity lithium sulfate from a lithium-containing composite oxide deposited on an eroded surface of a waste sagger discarded. Therefore, when the method for producing high-purity lithium sulfate from a waste sagger of the present invention is used, it is expected not only to be able to produce high-purity lithium sulfate that can be used for manufacturing lithium secondary batteries by recycling a discarded waste sagger, but also to be able to recycle a positive electrode active material, iron oxide, alumina, silicate, and calcium carbonate obtained as by-products during the production process of the lithium sulfate.

The present invention provides a method for recovering lithium from a lithium precipitate mother liquor and battery-grade lithium carbonate. The method for recovering lithium from a lithium precipitate mother liquor of the present invention comprises first adding a composite extractant to the lithium precipitate mother liquor for extraction to obtain a loaded organic phase and a sodium sulfate raffinate; then adding acid to the loaded organic phase for back extraction to obtain a lithium sulfate solution; finally, adding sodium carbonate to the lithium sulfate solution to precipitate lithium, and filtering to obtain lithium carbonate and a filtrate; wherein the composite extractant is a mixture of HBL121 and a betaine-type amphoteric surfactant. The method for recovering lithium from a lithium precipitate mother liquor of the present invention significantly shortens the lithium extraction process, reduces costs, and can achieve a lithium yield of over 99.5%, significantly improving the lithium yield. The present invention also provides battery-grade lithium carbonate obtained by the method of the present invention.

Embodiments provides a process of extracting lithium from spodumene. The process comprises providing a lithium sulfate solution (12) formed from leaching spodumene with sulfuric acid, and adding calcium chloride to the lithium sulfate solution to form a lithium chloride solution and to precipitate gypsum, for example in a conversion unit (14). The lithium chloride solution may then be subject to a sorbent process to selectively adsorb lithium ions to a sorbent, for example in a sorbent unit (16), and form a lithium-depleted solution (20). The process also includes desorbing the lithium ions from the sorbent to produce a lithium-rich solution (24).

The application discloses a method for recycling battery powder in an integrated whole chain, which comprises the following steps: firstly, the content of copper and aluminum in the subsequent separation process is reduced as much as possible by using the method of centrifugal gravity separation, so as to reduce the cost of impurity removal; and secondly, the battery powder is subjected to aerobic roasting, so that the battery powder reacts with iron sulfate, H2O2 and sulfuric acid. On the one hand, the long-chain organic matters such as the binder and the carbon-coated film attached to the surface of the lithium iron phosphate positive active material are removed, so that the hydrophilicity of the positive active material is restored, and the separation effect between the positive and negative active materials is enhanced. On the other hand, the aerobic roasting can make the battery powder react with iron sulfate, H2O2 and sulfuric acid to generate roasting products such as lithium sulfate. The lithium in the products after the aerobic roasting can be extracted by using water, and no reagent other than water is needed in the lithium extraction step, so that the lithium extraction efficiency is further improved.

This invention discloses a method for preparing a single-crystal lithium nickel manganese oxide cathode material with specific exposed crystal planes. The method involves adding a low eutectic point lithium salt system to alcohol for grinding, adding a nickel-manganese precursor, grinding and drying, sintering twice, centrifuging and washing, and vacuum drying to obtain the single-crystal lithium nickel manganese oxide cathode material with specific exposed crystal planes. The low eutectic point lithium salt system is a lithium salt composition capable of undergoing a eutectic reaction, including two of lithium hydroxide, lithium nitrate, lithium carbonate, lithium chloride, lithium bromide, lithium fluoride, lithium iodide, and lithium sulfate. The preparation method of this invention is applicable to preparing single-crystal lithium nickel manganese oxide cathode materials with (111), (110), and (100) planes as the main exposed crystal planes, resulting in significantly improved electrochemical cycle performance.

A method for producing sodium hydroxide (NaOH) or lithium hydroxide (LiOH) and sulfuric acid (HSO) includes producing sodium sulfate (NaSO) or lithium sulfate (LiSO) from battery manufacturing and recycling, and converting the produced NaSO or LiSO to NaOH, LiOH, and HSO via an electrochemical salt decomposition process. The processing step can be carried out in a closed system so that the produced NaSO or LiSO can be used in the conversion step, along with optional purification steps. In particular, the LiOH, NaOH, and NaSO are recycled to the battery recycling or battery manufacturing process.

This application relates to a method for preparing high-purity lithium carbonate and its application. The preparation method includes the following steps: preparing a sodium carbonate solution and a purified lithium sulfate solution; mixing the sodium carbonate solution and the purified lithium sulfate solution and reacting them until the pH of the reaction system reaches 6.6–7.4; separating the solid and liquid components of the reaction system and collecting the solid product; wherein the reaction system is cyclically kept at a temperature between a first temperature T1 and a second temperature T2, where T1 is 15°C–20°C and T2 is 25°C–35°C. By controlling the cyclical holding of the reaction system within a specific temperature range, lithium carbonate can be fully precipitated, and impurities can be avoided. The lithium carbonate obtained by this preparation method has high purity and can be used as battery-grade lithium carbonate; furthermore, the preparation method has a high yield and a short processing time, which is beneficial for its widespread application.

Disclosed is a buffer for enhancing enzymatic cleavage activity of a Cas protein, 5 comprising one or more components selected from the group consisting of: a salt selected from the group consisting of monopotassium phosphate (KH₂PO₄), sodium formate (HCOONa), calcium acetate (Ca(C₂H₃O₂)₂), sodium acetate (CH₃COONa), ammonium sulfate ((NH₄)₂SO₄), potassium thiocyanate (KSCN), calcium chloride (CaCl2), sodium chloride (NaCl), Nickel(II) nitrate (Ni(NO3)2), lithium sulfate (LiSO4); an organic solvent 0 selected from the group consisting of Tween 20, Dithiothreitol (DTT), Phenylmethylsulfonyl fluoride (PMSF), 2-Methyl-2,4-pentanediol (MPD), acetone, dimethylsulfoxide (DMSO), ethylene glycol, methanol, 2-propanol, EDTA, urea; and a protein which is casein. Also disclosed is a detection kit for a nucleic acid, comprising the buffer as disclosed herein, a Cas protein and a crRNA. Further disclosed is a method 5 of detecting a nucleic acid in a sample by CRISPR-cas, using the detection kit as disclosed herein.

The present invention discloses a wastewater treatment process for preparing lithium sulfate solution, and relates to the technical field of wastewater treatment. The wastewater treatment process for preparing lithium sulfate solution, through the cooperation of positioning fins installed inside the machine body and multiple filter screens, can drive the multiple filter screens to operate during the mixing of liquids, thereby ensuring the filtering effect of production wastewater. The elastic cleaning scraper cooperates with the arc-shaped loading rack to scrape impurities adhered to the surface of the filter screens, and then the operation of multiple feed rollers automatically pushes the impurities out, ensuring the subsequent mixing effect of production wastewater and dilute sulfuric acid, while also improving the operational convenience of the equipment.

The invention discloses a method for preparing lithium carbonate or lithium hydroxide through lithium sulfate desulfurization, and relates to the technical field of lithium compound preparation. According to the method, sulfate ions in a lithium sulfate solution are removed through a precipitation method or an extraction method, metal ion impurities such as Fe, Al and Mg existing in the solution are removed in a hydroxide precipitation mode in the mode of adjusting the pH of the solution, finally lithium carbonate is generated through a lithium precipitation method, lithium hydroxide is generated through a cooling crystallization precipitation mode, and the lithium sulfate solution is obtained. Therefore, the purity of the product is obviously improved; after sulfate ions are removed by utilizing an extraction method, the alkalinity of the aqueous-phase lithium-containing solution is remarkably improved, so that the dosage of alkaline substances during subsequent lithium precipitation and pH adjustment is reduced, and the cost of raw materials is greatly reduced; the method for preparing lithium carbonate or lithium hydroxide through lithium sulfate desulfurization is simple in reaction, easy and convenient to operate, easy to implement and suitable for large-scale industrial production of lithium carbonate and lithium hydroxide.

The invention relates to the technical field of metallurgy, in particular to a method for improving the leaching rate of clinker lithium. According to the leaching method, water washing is adopted in the immersion cleaning stage, acid washing is adopted in the leaching stage, under the condition that most lithium sulfate in the clinker can be leached out by water, insoluble lithium potassium sulfate double salt in the clinker is further dissolved through sulfuric acid leaching, and therefore the leaching rate of clinker lithium is increased. Wherein the dosage of the sulfuric acid can be determined according to an experimental formula, namely the total molar dosage of the sulfuric acid is 0.2 * molar weight of lithium in the clinker + 0.2 * molar weight of potassium in the clinker + 0.03 molar weight of sodium in the clinker. 10% dilute sulfuric acid is prepared according to the total molar weight of sulfuric acid to serve as leaching acid liquor, experiments confirm that the filtering performance of a filter cake is not obviously influenced when 10% acid is adopted as washing liquor, a good washing effect can be guaranteed, leaching liquor and the washing liquor are separated and purified respectively, and the treatment cost and loss of lithium in the solution can be reduced.

This invention provides a cathode composite material and a cathode containing the cathode composite material, as well as a method for preparing the same, relating to the field of electrochemical materials technology. The invention provides a cathode composite material comprising a p-type organic material, an inorganic lithium salt, a conductive agent, and a binder; the inorganic lithium salt is selected from one or more mixtures of lithium phosphate, lithium carbonate, lithium fluoride, and lithium sulfate. The innovative addition of an inorganic lithium salt to the p-type organic material effectively increases the p-type doping concentration, thereby improving the utilization rate of active sites and specific capacity of the p-type organic material, and significantly enhancing the electrochemical performance of the p-type organic energy storage material. The lithium-ion battery cathode sheet prepared using the cathode composite material provided by this invention not only significantly improves battery energy storage performance but also has the advantages of mild preparation conditions and simple processes, offering broader development potential compared to traditional lithium-ion batteries.

The invention discloses a purification and separation method for producing lithium salt, and belongs to the technical field of lithium salt production, and the purification and separation method specifically comprises the following steps: step S1, performing crystal transformation roasting, cooling ball milling and acidification roasting on spodumene concentrate, adding water into acidified clinker obtained after cooling, and stirring for slurrying; s2, single fly powder slurry is added into the slurried slurry, the pH is adjusted, and continuous neutralization leaching is carried out; s3, carrying out plate-and-frame pressure filtration on the neutralized leaching slurry by adopting a pressure filter to obtain neutralized leaching liquid and leaching residues; step S4, performing alkalization and impurity removal on the obtained neutralized leachate, specifically, firstly adding liquid caustic soda, adjusting the pH value to 10-12, and removing magnesium; then adding a sodium carbonate solution to remove calcium so as to complete purification and impurity removal; s5, feeding the purified and impurity-removed feed liquid to a sedimentation centrifuge for solid-liquid separation to obtain purified slag and a lithium sulfate solution; the method is simple and easy to implement and good in impurity removal effect, lithium loss is reduced, continuous production is met, the production efficiency is effectively improved, and the cost is reduced.

The present invention is used in the field of lithium-ion battery technology, and discloses a non-aqueous electrolyte comprising the following substances by weight: 5-20% electrolyte lithium salt, 70-90% organic solvent, and 2%-9% functional additives, wherein the functional additives include fluorosulfonyl difluoroacetate pentafluorocyclotriphosphazene. Compared with the classic ethoxy pentafluorocyclotriphosphazene, fluorosulfonyl difluoroacetate pentafluorocyclotriphosphazene has more sulfonyl and ester groups. The corresponding positive electrode electrolyte interface layer (CEI) rich in inorganic lithium salts such as lithium sulfate and lithium fluoride can stabilize the interface between the positive electrode and the electrolyte at high voltage, suppress the rise in impedance, and make the stable circulation of 5-volt spinel a reality. The introduction of ester groups can increase the solubility of lithium salts in the electrolyte, reduce the viscosity of the solution, improve the wetting ability, and have a good flame retardant effect. Batteries containing fluorosulfonyl difluoroacetate pentafluorocyclotriphosphazene additive electrolytes show better electrochemical performance than the control group.

The application discloses a kind of 3D printing desert sand concrete mortar, printing method and application, and wherein, 3D printing desert sand concrete mortar is made of including the following weight parts of raw materials: fast hard sulphoaluminate cement 200-300 parts;Modified desert sand 100-200 parts;Silica fume 20-50 parts;Viscosity modifier 0.1-0.5 parts;Retarder 0.5-1.5 parts;Early strength agent 1-2 parts;Water 100-150 parts;Wherein, the modified desert sand is pickled and washed to neutral after drying desert sand, and its particle size range is 0.075-0.3mm.The viscosity modifier is warm wheel glue or xanthan gum, the retarder is sodium citrate or tartaric acid, the early strength agent is lithium sulfate or lithium carbonate, and water-cement ratio is 0.40-0.50.The application is optimized by raw material formula, desert sand modification treatment and printing process synergistic innovation, which solves the performance contradiction problem of 3D printing material and the technical problem of desert sand application, realizes resource local material and green low-carbon construction, and has significant practical value and broad popularization prospect in the field of 3D printing of desert area building.