31 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 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 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 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.

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 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.

The invention discloses a composite clarifying agent containing strontium carbonate, and belongs to the technical field of clarifying agents. Comprising the following raw materials in parts by weight: 30-50 parts of mirabilite, 20-40 parts of strontium carbonate, 5-15 parts of sodium thioantimonate, 4-12 parts of sodium pyroantimonate and 10-30 parts of sodium nitrate. The use cost of the raw materials is reduced; and the optical performance of the photovoltaic glass is improved. By adding strontium carbonate, the refractive index and dispersion of the glass can be effectively reduced, the transparency and optical performance of the glass are improved, and the light transmittance of the glass is increased; the chemical stability resistance is enhanced. The strontium carbonate component can improve the compactness and hardness of the glass, enhance the corrosion resistance of the glass to chemical substances such as acid, alkali and the like, and improve the mildew resistance of the glass; the mechanical strength such as bending resistance of the photovoltaic glass is improved; and the strontium carbonate can also improve the compression resistance and bending resistance of the glass. The method has important application value in the field of photovoltaic glass production.

This invention relates to the fields of inorganic chemical engineering and textile auxiliaries, and discloses a surface modification process for textile-grade sodium metaantimonate to improve dispersibility. The process includes: adding sodium aluminate to a sodium metaantimonate suspension and stirring until dissolved to create an alkaline liquid environment in which tetrahydroxyaluminate ions are stably present; adding an aqueous solution of phenylphosphonic acid dropwise to this alkaline system for acid-base neutralization, controlling the hydrolysis of aluminum species using the acid release rate, and inducing in-situ generated aluminum hydroxyl species to coordinate with phenylphosphonate ions. This invention constructs an antimony-oxygen-aluminum-oxygen-phosphorus chemical hybrid coating layer without a phase interface on the surface of sodium metaantimonate through a specific acid-base coupling synchronous mineralization mechanism. This kinetically blocks the self-condensation aging path of aluminum species, improves the interfacial bonding force and thermal stability of the modified layer under high temperature and high shear conditions, and effectively solves the problems of thermal desorption and secondary agglomeration of sodium metaantimonate during melt spinning.

The invention belongs to the field of polymer compositions, and particularly relates to a flame-retardant polyester composite material and a preparation method and application thereof.The flame-retardant polyester composite material is prepared from 35-65 parts of polyester resin, 20-50 parts of reinforcing filler, 10-14 parts of brominated flame retardant, 0.5-1 part of antimony compound, 3-5 parts of hydrotalcite and 0-1 part of processing agent, the brominated flame retardant is at least one of decabromodiphenyl ethane, brominated epoxy resin, brominated polystyrene, tri (tribromophenoxy) triazine, brominated polycarbonate and poly (pentabromobenzyl acrylate), and the antimony compound is at least one of antimony trioxide, antimony pentoxide and sodium antimonate. The proportion of antimony in a bromine-antimony flame-retardant system is greatly reduced, the glowing filament ignition temperature of the flame-retardant polyester composite material is increased, the flame-retardant grade of the material is not reduced, meanwhile, good mechanical properties are kept, and the formula cost is reduced.

The name of the invention is sodium antimonate for plasma spectrometry detection and a preparation method of a hydrate solution sample of the sodium antimonate. Belongs to the technical field of trace impurity element detection. The method mainly solves the problems of tedious detection means, low dissolution efficiency, easy introduction of impurities and influence on sample detection accuracy in the existing method. The method mainly comprises the following steps: (1) weighing uniformly ground sodium antimonate or sodium antimonate hydrate into a plastic container which can be heated in a closed manner, and then adding hydrofluoric acid and hydrochloric acid or / and nitric acid into the container; (2) sealing a container filled with sodium antimonate or sodium antimonate hydrate, hydrofluoric acid and hydrochloric acid or / and nitric acid, heating at low temperature to completely dissolve the sample, cooling to room temperature, transferring to a volumetric flask, diluting to the scale, and shaking uniformly to obtain a sodium antimonate or sodium antimonate hydrate solution to be detected. The method has the characteristics of small reagent dosage, high dissolution efficiency, low salinity and low spectral background, and is mainly used for determining trace impurity elements contained in sodium antimonate and hydrates thereof.

The invention relates to the technical field of detection, particularly provides a method for determining the content of harmful elements in a sodium pyroantimonate sample, and aims to solve the problems of low efficiency and poor precision when the content of the harmful elements in the sodium pyroantimonate sample is determined. In order to achieve the purpose, the determination method comprises the following steps: weighing a sodium pyroantimonate sample with a first preset mass, and putting the sodium pyroantimonate sample into a digestion container; adding oxidizing acid with a first preset volume into the digestion container, and preheating the digestion container; adding a second predetermined volume of hydrochloric acid into the digestion container, and reheating the digestion container to completely digest the sodium pyroantimonate sample; fixing the volume of the completely digested sodium pyroantimonate sample to obtain a test solution; and determining the content of harmful elements in the test solution. According to the method, low-valence unstable harmful elements can be heated and oxidized into high-valence harmful elements by using the oxidizing acid, so that the accuracy of a determination result is ensured.

The invention discloses a novel photovoltaic glass formula and a production process thereof, and belongs to the technical field of photovoltaic glass, the formula innovatively introduces spodumene tailings as a part of raw materials, and the spodumene tailings comprise quartz sand, soda ash, aluminum hydroxide, limestone, dolomite, mirabilite, sodium pyroantimonate and a specific proportion of spodumene tailings. The core of the production process is that an electric field assisted smelting technology is adopted, and a direct-current electric field is applied in the melting process, so that the melting, clarifying and homogenizing processes of the glass are completed at a relatively low temperature. According to the technical scheme, the dependence on high-purity quartz sand is effectively reduced, the raw material cost is reduced by utilizing industrial solid waste, and the production energy consumption is reduced by optimizing the melting process. The prepared photovoltaic glass has excellent performances of low density, high transmittance, good thermal stability and the like.

The invention belongs to the technical field of copper smelting flux, and particularly relates to a sodium borate-calcium-based composite flux, a preparation method and application of the sodium borate-calcium-based composite flux in copper fire refining. The sodium borate-calcium-based composite flux is composed of calcium carbonate, sodium borate, sodium carbonate and fluorite according to a specific proportion, and through the calcium-boron-sodium ternary synergistic effect, arsenic and antimony are efficiently removed, and meanwhile the yield of copper is increased. And the chemical erosion to the magnesite-chrome brick of the anode furnace is obviously reduced. Calcium oxide generated by high-temperature decomposition of calcium carbonate in the flux reacts with arsenic and antimony to generate stable calcium arsenate, sodium arsenate, calcium antimonate and sodium antimonate, so that efficient removal of arsenic and antimony is realized; b2O3 generated by decomposition of sodium borate and MgO in the magnesite-chrome brick form a high-melting-point Mg3B2O6 protection layer, the erosion rate of the magnesite-chrome brick is subjected to breakthrough control, the order of magnitude is reduced compared with a traditional process, and the melt viscosity is reduced through fluorite so as to promote slag-copper separation. The flux can completely replace a traditional sodium carbonate process, equipment transformation is not needed, the flux is suitable for crude copper containing high arsenic and antimony, the service life of a furnace lining is remarkably prolonged, and the copper grade is improved.

The application provides a sodium pyroantimonate production reaction kettle, and relates to the technical field of sodium pyroantimonate production, which comprises a kettle body, a kettle cover, a bottom plate, a top plate and a cover moving assembly. The kettle body is arranged on the bottom plate, the top plate is located above the kettle body, a plurality of stand columns are fixedly arranged between the bottom plate and the top plate, the kettle cover can be covered on the top opening of the kettle body, the cover moving assembly is arranged on the top plate, and the cover moving assembly can drive the kettle body to move up and down and left and right. The cover moving assembly can control the kettle cover to move up and down and left and right with two degrees of freedom, realize the covering and separating actions between the kettle cover and the kettle body, change the opening mode of the kettle cover from the traditional manual operation to mechanical control, improve the production efficiency, and avoid the direct contact of the operator with the heavy kettle cover, thereby ensuring the operation safety.

The application relates to the technical field of inorganic chemical materials, and discloses a control synthesis process of a high-temperature-resistant sodium meta-antimonate crystal structure, which comprises the following steps: dispersing diantimony trioxide in a sodium hydroxide aqueous solution with an initial concentration of 6.5-8.0 mol / L, adding sodium meta-aluminate as a crystal lattice directing agent to prepare a precursor bottom solution; heating the bottom solution and maintaining turbulent stirring, performing double-flow path synchronous compensation, adding hydrogen peroxide aqueous solution drop by drop and synchronously adding sodium hydroxide; dynamically setting the coupling relationship of the alkali supplementing rate, the oxidation rate and the reaction stoichiometric ratio, and real-timely offsetting the dilution effect of reaction generated water and solvent water, so that the free sodium hydroxide concentration of the mother liquor in the whole reaction process is maintained to be above 6.0 mol / L until the reaction endpoint is reached; the application dynamically clamps the reaction boundary, blocks the path of the lattice gap water or the surface hydroxyl group, and prepares anhydrous sodium meta-antimonate without a crystallization water removal step in the whole temperature range, so that the foaming problem in high-temperature processing is solved.

The utility model relates to the technical field of packaging, and discloses a quantitative and efficient packaging device for sodium pyroantimonate. The packaging device comprises a packaging device body, hoppers are arranged on the two sides of the upper end of the packaging device body, the lower ends of the hoppers communicate with discharging hoses, discharging openings are formed in the two sides of the upper surface of the packaging device body, a lead screw motor is installed in one side of the upper end of the packaging device body, and a lead screw is arranged at one end of the lead screw motor; moving blocks are arranged on the two sides of the discharging hose, threads of the moving blocks are connected to the outer surface of the lead screw, a measuring hopper base is installed at the lower end of the discharging opening, a transmission belt is arranged in the lower end of the packaging device body, a sealing machine is installed at one end of the transmission belt, and under conveying of the discharging hose, sodium pyroantimonate is conveyed into the measuring hopper to be filled with the sodium pyroantimonate. And when the discharging hose is moved to the discharging opening in the other side, sodium pyroantimonate discharging packaging can be carried out on the full measuring hopper, and the quantitative packaging efficiency and the packaging effect are improved under the back-and-forth movement of the discharging hose.