41 results about "Sodium antimonate" patented technology

The present application relates to the technical field of anode slime treatment, and discloses a method for removing antimony and tellurium from anode slime by multi-stage pressurization and chlorine-free process, which comprises the following steps: S1, anode slime pretreatment, S2, multi-stage pressurization treatment, S3, separation of antimony and tellurium from the anode slime, S4, preparation of sodium antimonate, S5, tail gas treatment, S6, waste liquid treatment, S7, post-treatment. The method is characterized by the following: one-stage pressurized thiourea transformation is used for deep copper removal, and two-stage pressurized sulfuration is used for chlorine-free antimony and tellurium removal. The process flow does not involve chlorine-containing substances, and the pressurized leaching of alkaline medium does not produce substances with strong corrosivity, thereby reducing the damage to the equipment. In the process of removing antimony and tellurium, the harmful substances generated during the reaction can be treated by waste gas and waste liquid treatment, and the by-products, precipitates, incompletely removed heavy metal ions, trace pollutants and the like in the tail liquid can be removed or converted into harmless substances, so that the tail liquid meets the discharge standard and the environmental pollution caused by the tail liquid discharge is reduced.

The invention relates to a method for recovering an antimony resource in arsenic-removed lead anode slime by a fluorination conversion method, which comprises the following steps of: grinding fluoride, a slag former, a reducing agent and the arsenic-removed lead anode slime to a certain particle size, and mixing according to a certain proportion to obtain a mixed material; the mixed material is subjected to high-temperature reduction smelting, the adding amount of fluoride, the adding amount of a slag former, the adding amount of a reducing agent, the smelting temperature and the smelting time are controlled, sodium antimonate in the arsenic-removed lead anode slime reacts with fluoride to generate sodium fluoride and antimony pentoxide, antimony pentoxide is reduced into metal antimony by the reducing agent, and lead-antimony alloy is formed; antimony resources in the arsenic-removed lead anode slime are recycled, and other components become smelting slag; and the addition amount of the fluoride relative to the arsenic-removed lead anode slime is 5-10 wt%. Compared with the prior art, the recovery efficiency of antimony resources in the arsenic-removed lead anode slime is improved.

The invention belongs to the technical field of metallurgy, and relates to a method for testing gold in crude antimony crystal salt, which comprises the following steps: S1, roasting the crude antimony crystal salt at 280-320 DEG C for the first time, then heating to 550-650 DEG C, and roasting for the second time; and S2, after roasting is finished, a composite flux and a silver nitrate solution are added, heat preservation melting is conducted for 10-15 min at the temperature of 1150-1200 DEG C, a lead buckle is obtained, then the lead buckle is subjected to soot blowing, and the gold content in the crude antimony crystal salt is obtained through measurement. According to the method, the influence of sodium sulfide sulfate, sodium sulfide and sodium antimonate on gold content testing is solved through oxidizing roasting pretreatment; and the iron powder, the nickel powder and other composite fluxing agents are added in the subsequent melting process, and the gold content testing accuracy is remarkably improved.

The invention relates to the technical field of preparation of inorganic chemical materials, and discloses a controlled synthesis process of a high-temperature-resistant sodium antimonate crystal structure, which comprises the following steps: dispersing antimony trioxide in a sodium hydroxide aqueous solution with the initial concentration of 6.5-8.0 mol / L, and adding sodium metaaluminate as a lattice directing agent to prepare a precursor base solution; heating the base solution, maintaining turbulent stirring, executing double-flow-path synchronous compensation, dropwise adding a hydrogen peroxide aqueous solution and synchronously adding sodium hydroxide; the method comprises the following steps: dynamically setting a coupling relationship among an alkali supplementing rate, an oxidation rate and a reaction stoichiometric ratio, counteracting a dilution effect of water generated by reaction and solvent water in real time, and maintaining the concentration of free sodium hydroxide in a mother solution in the whole reaction process at 6.0 mol / L or above until a reaction endpoint is reached. The path of lattice interstitial water or surface hydroxyl is blocked, anhydrous sodium antimonate without crystal water removal steps in the whole temperature range is prepared, and the foaming problem in high-temperature processing is solved.

The present invention belongs to the field of metallurgy and relates to a method for synergistically recovering valuable elements from arsenic-antimony fly ash and antimony electrodeposition lean solution. The method comprises the following steps: S1: mixing the arsenic-antimony fly ash with the antimony electrodeposition lean solution for an alkaline leaching reaction, whereupon antimony oxide slag and an arsenic-rich antimony solution are obtained; S2: adjusting the pH of the arsenic-antimony solution obtained in step S1 to a pH of 7-8, whereupon antimony sulfide slag, hydrogen sulfide gas, and an arsenic-rich solution are obtained; and S3: adjusting the pH of the arsenic-rich solution obtained in step S2 to a pH of 1-2, whereupon arsenic sulfide slag, hydrogen sulfide gas, and a sodium sulfate solution are obtained. The present invention utilizes the synergistic reaction of the arsenic-antimony fly ash with the antimony electrodeposition lean solution, and subsequently separates arsenic and antimony from the arsenic-rich antimony solution by reacting sodium thioarsenite (Na3AsS3) and sodium thioantimonite (Na3SbS3) with acid in different sequences. The separation and recovery steps are simple and the recovery rate is high.

The utility model discloses a sodium antimonate preparation device and a screening mechanism thereof. The sodium antimonate preparation device comprises a reaction kettle, a sodium hydroxide storage tank, a powder conveying mechanism, a hydrogen peroxide storage tank, a soft water storage tank, a centrifugal machine, a filtrate storage tank, a drying machine and a stockpiling warehouse, the powder conveying mechanism, the sodium hydroxide storage tank, the hydrogen peroxide storage tank and the soft water storage tank are used for supplying raw materials into the reaction kettle; the raw materials are conveyed to the centrifugal machine after reaction in the reaction kettle; liquid separated by the centrifugal machine is output to a filtrate storage tank, and formed solid is output to a drying machine and dried by the drying machine; an evaporator is arranged in the filtrate storage tank, and the filtrate is output to the reaction kettle after being heated, evaporated and concentrated by the evaporator. The raw materials in the filtrate are used again for reaction, so that the utilization rate of the raw materials is improved. And by arranging the screening mechanism, unqualified sodium antimonate is removed. And packaging the qualified sodium antimonate for sale.

The invention discloses a method for deeply removing arsenic from sodium antimonate. The method comprises the following steps: retaining a low-arsenic sodium antimonate filter cake obtained by arsenic removal treatment through a leaching-oxidation precipitation method in situ in a filter press; a composite reagent solution is introduced into the closed filter press, soaking and reaction are carried out on the low-arsenic sodium antimonate filter cake, liquid obtained after sulfuration and alkali washing is discharged, a wet sodium antimonate product is obtained, and the composite reagent solution is a mixed solution containing a sulfuration reagent and NaOH; the wet sodium antimonate product is circularly washed with water and dried, and a sodium antimonate product is obtained; in the sodium antimonate product, the content of arsenic is not more than 0.001%. According to the method, the purpose of deeply removing arsenic from the sodium antimonate material with low arsenic content (As2O3lt; 0.05%) is achieved by optimizing the process parameters such as the proportion, the concentration and the temperature of a deep washing reagent.

The invention belongs to the technical field of high polymer materials, and particularly discloses a novel lignin flame retardant, a preparation method and a preparation method of modified PBT (polybutylene terephthalate) plastic. The preparation method of the novel lignin flame retardant comprises the following steps: dissolving sodium antimonate in tartaric acid to form a first solution; uniformly distributing the first solution in lignin powder to prepare an antimony-containing lignin flame-retardant synergist; the antimony-containing lignin flame retardant synergist and a brominated flame retardant are uniformly mixed to prepare the novel lignin flame retardant. Sodium antimonate is dissolved in tartaric acid, then lignin is added, a large number of active groups in lignin react with the tartaric acid, the flame retardant effect is improved, and the prepared antimony-containing lignin flame retardant synergist is high in flame retardance and high in preparation efficiency. Lignin is a natural polymer and is extremely low in utilization rate, and when the lignin is used as a flame retardant component to replace part of sodium antimonate, the lignin has a good environment-friendly effect and is relatively low in cost.

The utility model is applicable to the field of metal metallurgy, and provides oxidation-strengthened sodium pyroantimonate wet smelting equipment, which comprises a bottom frame, a reaction box and a top cover, the upper end of the bottom frame is fixedly connected with the reaction box, the upper end of the reaction box is hinged with the top cover, the top cover is provided with a liquid inlet pipe, the liquid inlet pipe is used for injecting an oxidizing agent into the reaction box, and the liquid inlet pipe is connected with the reaction box. A dispersing assembly is arranged in the reaction box in a matched mode, the dispersing assembly is used for dispersing an oxidizing agent injected from the liquid inlet pipe, stirring equipment is arranged at the bottom end in the reaction box in a matched mode, the outer wall of the reaction box is wrapped with a waterproof shell, and a cavity between the reaction box and the waterproof shell is filled with a cooling agent; a temperature control assembly is connected to the waterproof shell in a matched mode and used for controlling the temperature of a cooling agent in the waterproof shell. The reaction kettle has the advantages that an oxidizing agent and raw materials are quickly and uniformly mixed, the reaction efficiency is improved, and the temperature of reactants is effectively controlled.

The invention discloses a method for obtaining a sodium antimonate product based on two-stage circulating leaching, which comprises the following steps: primary sulfuration leaching: adding a sulfurizing agent into an antimony-containing material I under an alkaline condition, and carrying out primary sulfuration leaching to obtain antimony leaching liquid I and antimony leaching slag I; the antimony-containing material II is mixed with the antimony leaching liquid I under the alkaline condition, double-stage leaching is conducted, and double-stage antimony leaching liquid and double-stage antimony leaching slag are obtained; a vulcanizing agent is added into the double-stage antimony leaching slag under the alkaline condition, circulating vulcanization leaching is carried out, antimony leaching slag II and antimony leaching liquid II are obtained, and the antimony leaching liquid II is returned to double-stage leaching for double-stage leaching; oxidation antimony precipitation: mixing the two-stage antimony leaching liquid with an oxidizing agent, and carrying out oxidation reaction to obtain a sodium antimonate product. According to the method, gold leaching can be effectively inhibited without adding a complex inhibitor, meanwhile, gold is enriched in the antimony leaching slag to be recycled, the gold recovery rate can reach 99.6% or above, and the gold content in the sodium antimonate product can be reduced to 0.5 g / t or below.

This invention relates to a method for preparing high-purity sodium pyroantimonate from antimony-containing waste, belonging to the field of sodium pyroantimonate preparation technology. Specifically, the method includes: crushing and ball milling the antimony-containing waste, followed by sulfidation-alkali leaching in the presence of modified inorganic mineral additives. Antimony enters the solution as Na3[SbS3], while lead, copper, and iron precipitate as sulfides in the slag phase. The additives improve the settling and filtration performance of the leaching slag and assist in the adsorption of colloidal arsenic. After deep purification of the leachate with sodium sulfide, the mother liquor is cooled and crystallized to remove arsenic, which is separated as sodium arsenite crystals. The purified liquid undergoes air oxidation precipitation under seed crystal induction, followed by liquid-solid separation, washing, and drying to obtain high-purity sodium pyroantimonate product. This invention meets the quality requirements of electronic-grade glass clarifying agents, and features strong process compatibility, controllable additive costs, and recyclable mother liquor.

The invention discloses a method for producing sodium pyroantimonate from high and low boiling residues in the preparation process of high-purity antimony, and relates to the field of non-ferrous metal metallurgy. According to the method, the high-boiling-point substance and the low-boiling-point substance produced in the production process of the high-purity antimony are subjected to the steps of distillation, chlorination, hydrolysis, aging, neutralization, drying and the like to directly produce the sodium pyroantimonate product, so that direct productization of the high-boiling-point substance and the low-boiling-point substance in the preparation process of the high-purity antimony is realized, and the direct yield of the antimony in the production process of the high-purity antimony is improved; the method avoids on-site stockpiling of the high-purity antimony high-low boiling residues and environmental pollution, is simple to operate, and has good economic benefits.

The present application relates to the field of nonferrous metallurgy, and provides a method for preparing high-quality sodium pyroantimonate by pre-oxidation and double decomposition, comprising the following steps: under the assistance of ultrasonic waves, adding antimony oxide and hydrogen peroxide into a dilute nitric acid solution at 50-80 DEG C to react, carrying out liquid-solid separation, washing, and drying to obtain a powdered antimony pentoxide product; slurryzing the antimony pentoxide product with a potassium hydroxide solution, then adding the obtained slurry into a high-pressure reaction kettle, stirring and reacting under high temperature and high pressure, carrying out liquid-solid separation after cooling to obtain a potassium pyroantimonate solution; adding sodium hydroxide into the potassium pyroantimonate solution after heating to 70-90 DEG C, carrying out a double decomposition reaction, carrying out liquid-solid separation, and drying to obtain a sodium pyroantimonate product. The essence of the present application is to achieve the purpose of deeply removing impurities through the two processes of acidic oxidation and pressure dissolution, and to prepare a high-quality sodium pyroantimonate product by using a double decomposition reaction. The present application has the advantages of good quality of the sodium pyroantimonate product, good filtration performance, and stable technical indexes.

The invention relates to the technical field of inorganic fine chemical engineering, and discloses a synthesis method of a superfine sodium antimonate flame retardant for engineering plastics, which comprises the following steps: dissolving antimony trioxide, adding sodium gluconate, and stirring at a constant temperature of 43-47 DEG C to prepare a coordination equilibrium precursor solution; pumping the precursor solution and the hydrogen peroxide solution into a three-stage pipeline type high-shear dispersion machine, and controlling the gap between a stator and a rotor to be 0.2-0.3 mm and the rotating speed to be 4000-4500 rpm for reaction; according to the preparation method disclosed by the invention, a chemical coordination potential barrier is constructed by virtue of constant-temperature aging so as to delay a reaction induction period, coordination equilibrium is broken by virtue of mechanical energy dissipation of a high-shear field, nucleation is instantaneously initiated, and the problem that an oxidation reaction rate is mismatched with a micro-mixing rate is solved; the narrowing of the particle size distribution and the regularization of the morphology of the product are realized.

The invention belongs to the technical field of hydrometallurgy, and particularly discloses a method for separating and recovering lead, antimony and tin from secondary lead refining slag in a short process. The method provided by the invention comprises the following steps: mixing the secondary lead refining slag with a leaching agent, and carrying out solid-liquid separation after a leaching reaction to obtain lead-rich leaching slag and a leaching solution; an oxidizing agent is introduced into the leachate, solid-liquid separation is carried out after precipitation reaction, and sodium pyroantimonate precipitate and a tin-containing solution are obtained; adjusting the pH value of the tin-containing solution by dilute sulphuric acid, and inducing tin ions to hydrolyze and precipitate to obtain tin-rich precipitates; according to the method, the high selectivity of the leaching agent on tin and antimony is utilized, tin and antimony are selectively leached, and lead is separated and enriched into slag; oxidizing and precipitating the leaching solution rich in tin and antimony to prepare sodium pyroantimonate to realize tin and antimony separation; and finally, carrying out pH regulation and control on the tin-containing solution, and precipitating tin ions. According to the scheme, efficient separation and recovery of lead, antimony and tin can be achieved, and meanwhile the method has the advantages of being short in process, free of high-temperature reaction and low in cost.

The application discloses a method for removing copper from sodium antimonate at low temperature and at high speed, and the method comprises the following steps: under the conditions of negative pressure, microwave heating and stirring, removing copper from sodium antimonate, a water solvent and a composite copper removal reagent; after the reaction is completed, solid-liquid separation is performed; the obtained liquid part is a reaction mother liquor, and the obtained solid part is copper-removed sodium antimonate; and the copper removal substance in the composite copper removal reagent is an ammonium source substance. The method has the advantages of low reaction temperature, short reaction time, fast reaction speed, energy saving and environmental protection, good copper removal effect, high product yield, and the like. The obtained sodium antimonate product can meet the requirements of various glass fining agents and decoloring agents; the method reduces the requirement for copper in raw materials in the preparation of sodium antimonate, expands the source of the sodium antimonate raw material, reduces the cost of the raw material, and thus reduces the production cost of the sodium antimonate product.

A sodium pyroantimonate production and transportation tank comprises a supporting table and a storage tank, the storage tank is arranged above the supporting table, the storage tank is used for storing sodium pyroantimonate, and the supporting block is used for supporting the storage tank; the distance adjusting assembly is used for adjusting the distance between the two sets of supporting components; and the stabilizing assembly is used for binding and fixing the storage tank. The distance between the two sets of supporting components can be adjusted through the distance adjusting assembly, so that storage tanks with different lengths and sizes can be installed and fixed, the application range is expanded, the using flexibility of the transportation tank is improved, meanwhile, the storage tanks can be bound and fixed through the stabilizing assembly, the stability of the storage tanks in the transportation process is improved, and the transportation efficiency is improved. Therefore, the sodium pyroantimonate is convenient to transport.

The present invention discloses a sodium pyroantimonate wastewater treatment device, which includes a storage tank and a plate evaporator. An inlet pump is provided between the storage tank and the plate evaporator. The storage tank is connected to the inlet of the inlet pump through a lifting pipe, and the plate evaporator is connected to the outlet of the inlet pump through a feed pipe. As a sodium pyroantimonate wastewater treatment device, the present invention utilizes a steam compressor and a vacuum pump to make the sodium pyroantimonate wastewater boil at 70 °C under a negative pressure of 0.7 MPa, and part of the water evaporates to form condensed water for reuse. The concentrated solution of sodium pyroantimonate wastewater contains 30% NaOH and trace amounts of heavy metals and is used as a raw material for producing sodium pyroantimonate. Before heating the sodium pyroantimonate wastewater, the present invention preheats it using a steam preheater to reduce the heat loss of heat exchange in the plate evaporator and improve the heat exchange efficiency at the same time.

The utility model discloses efficient sodium antimonate production equipment. The efficient sodium antimonate production equipment comprises a supporting seat, a rotary switching disc and a function partitioning seat, a drainage cavity, a drying cavity and a recovery cavity are formed in the supporting seat in a penetrating manner; the rotary switching disc is mounted between the supporting seat and the function partition seat through a slewing bearing, a material groove is formed in the rotary switching disc, a filter screen is arranged at the bottom end of the material groove, and a rotary driving part is connected to the exterior of the rotary switching disc; a material injection cavity, a cleaning cavity, a drying cavity and a material collecting cavity are formed in the function partition base in the length direction of the function partition base in a penetrating mode, and the cleaning cavity, the drying cavity and the material collecting cavity are coaxially arranged with the drainage cavity, the drying cavity and the recycling cavity correspondingly. According to the sodium antimonate continuous production device, the supporting base and the function partition base are in butt joint through rotation of the rotary switching disc, then feeding, cleaning, drying and recycling of sodium antimonate are sequentially achieved, continuous production of the sodium antimonate is achieved, the production efficiency of the sodium antimonate is greatly improved, and the sodium antimonate continuous production device has the advantages of being simple in structure, efficient and convenient to use.

The invention discloses a method for reducing sodium content of calcium arsenate in a causticization process, and belongs to the technical field of dressing and smelting solid waste treatment. The method comprises the following steps: injecting arsenic-containing smelting waste liquid and an oxidant into a micro-channel reactor, and filtering after reaction to respectively obtain sodium antimonate precipitate and filtrate A; heating the filtrate A, and adding lime milk to carry out causticization arsenic precipitation operation; after causticization arsenic precipitation operation is finished, heat preservation thickening operation is performed in a thickener, an underflow product and an overflow product are obtained, the underflow product is filtered, calcium arsenate filter residues and filtrate B are obtained, and the filtrate B serves as liquid caustic soda and returns to the system for reuse; hot water and the calcium arsenate filter residues are placed in a stirring barrel to be stirred, filtering is conducted after stirring is finished, calcium arsenate and filtrate C are obtained, and the filtrate C is returned to causticization arsenic precipitation operation. On the basis of different material properties, dissolution and crystallization behaviors of the materials are regulated and controlled through combination of multiple methods, the sodium content of calcium arsenate in the causticizing arsenic precipitation process is effectively reduced, and the method has the advantages of being simple in process, environmentally friendly and low in sodium content of calcium arsenate slag.

The invention provides a heat-sealable and flame-retardant composite film. The heat-sealable and flame-retardant composite film comprises an aluminized film, a flame-retardant net film and a reinforced grid which are sequentially compounded, the flame-retardant net film comprises the following components in parts by weight: 40-60 parts of polyamide resin, 10-20 parts of EBA resin, 5-10 parts of a first flame retardant, 5-10 parts of a second flame retardant, 5-10 parts of a third flame retardant, 5-10 parts of a tackifier and 1-2 parts of an antioxidant. The first flame retardant comprises brominated polystyrene and / or brominated epoxy resin; the second flame retardant comprises sodium antimonate and / or sodium antimonate; the third flame retardant comprises zinc borate and / or zinc phosphate. The fluorine-containing composite film prepared by the invention has the characteristics of heat sealability, flame retardance and high barrier property, and also has the characteristics of easiness in continuous processing, uniform dispersion of the flame retardant, no use of a solvent, good performance consistency and the like. The heat-sealable and flame-retardant fluorine-containing composite film prepared by the invention has a wide application prospect in a heat-insulating and sound-insulating system of an airplane.

The invention belongs to the technical field of preparation of storage batteries, and particularly relates to a formula of a storage battery positive electrode lead paste. Comprising 800-1000 parts of lead powder, 1-5 parts of sodium antimonate, 0.5-3 parts of stannous mono-sulphate, 1-5 parts of graphite and 1-5 parts of conductive fibers. Wherein the sodium antimonate is the mass fraction of the sodium antimonate in the sodium antimonate aqueous solution, and the stannous sulfate is the mass fraction of the stannous sulfate in the stannous sulfate dilute sulfuric acid solution. According to the storage battery positive electrode lead paste disclosed by the invention, by using the components, in the preparation process, through a formula and a preparation method of liquid components, a specific positive electrode additive combination is adopted, and the dosage of the liquid components is controlled within a certain range, so that the prepared lead paste is uniform in texture and has good uniformity; the argillization of the positive lead plaster is delayed; and the discharge capacity and the cycle life of the battery are improved.

The invention belongs to the technical field of metallurgy, and relates to a method for synergistically recovering valuable elements from arsenic-antimony soot and an antimony electrodeposition barren solution, which comprises the following steps: S1, mixing the arsenic-antimony soot and the antimony electrodeposition barren solution for alkaline leaching reaction, and obtaining antimony oxide slag and an arsenic-antimony-rich solution after the reaction is finished; s2, adjusting the pH value of the arsenic-antimony-rich liquid obtained in the step S1 to 7-8, and obtaining antimony sulfide slag, hydrogen sulfide gas and an arsenic-rich liquid after the reaction is finished; and S3, adjusting the pH value of the arsenic-rich liquid obtained in the step S2 to 1-2, and obtaining arsenic sulfide slag, hydrogen sulfide gas and a sodium sulfate solution after the reaction is finished. According to the method, the arsenic and antimony in the arsenic-antimony-rich liquid are further separated by utilizing the synergistic reaction of the arsenic-antimony soot and the antimony electrodeposition barren solution and utilizing the different sequences of the sodium thioarsenite (Na3AsS3) and the sodium thioantimonite (Na3SbS3) with the acid, the separation and recovery steps are simple, and the recovery rate is high.

The utility model relates to the technical field of sodium pyroantimonate production, and discloses a reaction kettle for sodium pyroantimonate production, which comprises a kettle body, a stirring assembly is arranged in an inner cavity of the kettle body, the stirring assembly comprises a motor, an output shaft of the motor is fixedly connected with a transmission rod, and two sides of the transmission rod are fixedly connected with stirring rods. According to the sodium pyroantimonate production device, mixing and stirring can be performed during sodium pyroantimonate production by arranging the stirring assembly, sodium pyroantimonate particles can be ground and processed before stirring, so that the sodium pyroantimonate particles can be ground into powder and can better react with a solution, and external air can be blown to the aeration plate by arranging the pneumatic assembly, so that the sodium pyroantimonate production device can be used for producing sodium pyroantimonate. According to the sodium pyroantimonate reaction kettle, the solution is turned under the operation of the bubbles, so that the reaction time of the sodium pyroantimonate and the solution can be shortened, air entering the kettle body can be filtered through the arrangement of the filtering assembly, and pollution caused by external impurities to the sodium pyroantimonate during production is avoided.

The invention discloses a formula of photovoltaic rolled glass with ultrahigh transmittance. The formula comprises the following batch materials in percentage by mass: 65%-69% of quartz sand, 14.5%-16.5% of sodium carbonate, 11%-12% of dolomite, 3%-4% of limestone, 0.6%-0.8% of aluminum hydroxide and 1.33%-3.93% of a compound clarifying agent, the preparation method comprises the following steps: step 1, taking the quartz sand, the sodium carbonate, the dolomite, the limestone, the aluminum hydroxide and the composite clarifying agent according to the mass percent, and then mixing in a high-speed mixer; 2, melting the raw materials mixed in the step 1 in a high-temperature furnace for 2-4 hours; and step 3, after melting is finished, cooling the molten glass obtained in the step 2 to obtain finished glass. According to the invention, by reasonably matching the glass raw materials, namely the ratio, especially adjusting the dosage of the mirabilite, the sodium nitrate, the cerium hydroxide and the sodium pyroantimonate, and replacing the oxidation effect of a high-cost material sodium pyroantimonate with a low-cost material, the clarification of the glass is effectively improved, and the cost of the sodium pyroantimonate raw material can be greatly saved while the transmittance of the glass is improved.

The utility model relates to the technical field of sodium pyroantimonate packaging quality detection, and discloses a device for detecting the packaging quality of 25kg sodium pyroantimonate. The detection device comprises a detection device body, one end of the detection device body is provided with a product conveying belt, a precision weighing table, a mounting plate, a first scanning camera, a third waste conveying belt, a conveying belt and a sealing performance detection table, one side of the sealing performance detection table is provided with a mounting block, and the surface of one side of the mounting block is provided with a sealing cover; an observation window is mounted on the outer side of the sealing cover, a conveying belt is arranged at one end of the sealing performance detection table, a packaging material quality detection table is arranged at one end of the conveying belt, a mounting block is arranged on one side of the packaging material quality detection table, and a spectral analysis device is arranged on the surface of one side of the mounting block; and a product output conveying belt is arranged at one end of the packaging material quality detection table, so that the weight, the air tightness and the material quality of the 25kg sodium pyroantimonate package can be automatically detected, the labor cost is reduced, and the convenience and the working efficiency are improved.

The invention relates to the technical field of inorganic chemical synthesis, and discloses a preparation method of particle-size-controllable high-end flame-retardant sodium pyroantimonate, which comprises the following steps: completely dissolving antimony trioxide in a sodium hydroxide solution, and carrying out hot filtration to construct a homogeneous metastable state precursor without solid phase residue; excessive oxidant and seed crystal are preset in the base solution, and an oxidant-rich bearing phase is established; reverse continuous feeding of a precursor into an undertaking phase is strictly controlled, the injection rate of antimonite ions and the surface area of a seed crystal are dynamically matched in real time under the condition that excessive strong oxidation potential energy of a peroxidant is maintained in the whole process, and the reaction is carried out in a dynamic metastable region for inhibiting secondary nucleation until feeding is finished; according to the preparation method disclosed by the invention, a homogeneous precursor is constructed and reverse lean solute dynamic locking is implemented, so that solid-liquid interface hot spots and explosive nucleation caused by forward charging are eliminated, and monodispersity of particle size distribution of sodium pyroantimonate and high regularity of crystal morphology are realized.

This invention discloses a method for separating and recovering antimony and bismuth from copper-, arsenic-, antimony-, and bismuth-containing materials. The method involves adding sulfuric acid during the processing of the copper-, arsenic-, antimony-, and bismuth-containing materials, allowing copper to enter the liquid and enriching antimony and bismuth elements into the slag. Liquid alkali is then added to the slag, allowing arsenic to enter the liquid and further enriching antimony and bismuth elements into the slag. Liquid alkali and sodium hydrosulfide are then added to the slag, allowing antimony to enter the liquid for recovery, while bismuth remains in the slag, achieving antimony-bismuth separation. The slag composition meets the requirements for bismuth concentrate. A composite silicate is added to the sulfidation liquid to remove impurities such as bismuth, copper, and lead into the slag. The liquid then enters a pressurized reactor, where a catalyst is added and forced-air oxidation is applied, oxidizing antimony and allowing it to enter the slag. After drying, sodium antimonate is obtained. This is the first time a process has been achieved that does not use a chloride salt system to separately produce bismuth concentrate and sodium antimonate. This process shortens the wet separation and recovery process of antimony and bismuth, eliminates the high-chlorine wastewater generated by the chloride salt system, is environmentally friendly, and achieves antimony and bismuth recovery rates of over 98%.

This application relates to an electrolytic preparation method for low-arsenic antimony in an alkaline system, belonging to the field of hydrometallurgical technology. The method includes: separating the anode and cathode chambers using an anion exchange membrane; injecting sodium thiostite solution into the cathode chamber and sodium hydroxide solution into the anode chamber; using a stainless steel plate or mesh as the anode and a stainless steel plate as the cathode, and connecting it to a power source after pretreatment; performing pre-electrolysis to preferentially co-deposit impurities such as arsenic, which have similar electrode potentials to antimony, on the cathode to obtain a purified electrolyte; replacing the cathode plate after a period of settling, and then performing formal electrolysis to obtain a low-arsenic cathode antimony product. This application achieves deep removal of impurities such as arsenic through the synergistic effect of pre-electrolysis and the anion exchange membrane, avoiding the burial and contamination of impurities in the cathode antimony, while improving the deposition morphology of the cathode antimony, resulting in a high-quality cathode antimony product with a dense and smooth surface, extremely low arsenic content, and low levels of impurities such as copper, lead, and bismuth.

The present application belongs to the field of metallurgy, and relates to a method for testing gold in crude antimony crystalline salt, comprising the following steps: S1, first roasting the crude antimony crystalline salt at 280-320 DEG C, and then second roasting at 550-650 DEG C; S2, after the roasting, adding a composite flux and a silver nitrate solution, and then obtaining a lead button by heat preservation and melting at 1150-1200 DEG C for 10-15 min, and then obtaining the gold content in the crude antimony crystalline salt by cupellation and determination. The present application solves the influence of sodium sulfide, sodium sulfide and sodium antimonate on the gold content test by oxidative roasting pretreatment; and the accuracy of the gold content test is significantly improved by adding a composite flux such as iron powder and nickel powder in the subsequent melting process.