18 results about "Arsenic oxide" patented technology

The invention discloses a composite clarifying agent for alkali-free glass and a manufacturing method of an alkali-free glass substrate, and relates to the technical field of glass manufacturing, the composite clarifying agent for alkali-free glass comprises the following components by mass: 12-30% of ammonium chloride, 48-73% of sulfate, and 11-25% of calcium fluoride; the preparation method comprises the following steps: adding a composite clarifying agent accounting for 0.2-1.2% of the total weight of the glass raw material into the glass raw material, uniformly mixing to form a batch, and carrying out melting, molding, spraying, annealing, cutting, alkali cleaning and other processes on the batch to finally prepare the glass substrate. The prepared composite clarifying agent does not contain toxic substances such as arsenic oxide and antimony oxide, the glass substrate produced by using the clarifying agent not only has an excellent clarifying effect, but also can recycle SO2 and NH3 gas generated in the melting process, can effectively solve the quality problems such as micro-flaws on the surface of the glass substrate in the production process, and has a good application prospect. And the production cost can be reduced and the product quality can be improved.

The invention discloses a method and a device for deeply purifying an arsenic solution and preparing high-purity arsenic oxide. The method comprises the following steps: oxidizing antimony impurities in an arsenic solution, precipitating, deeply removing, adding a reducing agent to reduce pentavalent arsenic in the solution into trivalent arsenic, decomposing, evaporating, cooling and crystallizing to obtain the high-purity arsenic trioxide. Wherein oxidation precipitation is carried out in a purification tank, reduction is carried out in a reduction tank, the purification tank and the reduction tank are located in the same box body and are separated by a filter screen and a partition plate in the middle, precipitated arsenic antimonate generated after purification in the purification tank is intercepted through the filter screen, and filtrate enters the reduction tank; during reaction, the partition plate is started for use to prevent the solution from flowing. The filtrate enters a reduction tank, reducing agents such as sulfur dioxide are introduced, pentavalent arsenic in the solution is further reduced to form trivalent arsenic, and a high-purity arsenic trioxide product (As2O3 is larger than or equal to 99.5%, and Sb is smaller than or equal to 0.05%) is prepared.

The invention belongs to the technical field of waste resource utilization, and particularly relates to a method for preparing crude arsenic by recycling arsenic-containing hydrogen gas. The method comprises the following steps: in an oxygen-isolated environment, introducing arsenic hydride-containing gas into a sulfuric acid aqueous solution with the mass fraction of 70%-98%, carrying out an oxidation-reduction reaction to obtain slurry containing crude arsenic, and carrying out solid-liquid separation to obtain a crude arsenic product. According to the method, the arsenic hydride gas can be directly converted into the arsenic elementary substance, so that the recovery of arsenic in the arsenic-containing material is realized. Concentrated sulfuric acid can fully oxidize arsenic hydride in a specific concentration range, and the arsenic hydride is prevented from being excessively oxidized into arsenic trioxide. Compared with other acidic or oxidizing solutions, the method has the advantages that the crude arsenic product with the purity larger than or equal to 95% can be directly obtained under the normal-temperature and normal-pressure conditions, the generated by-product dilute sulphuric acid can be circularly used for absorbing arsenic hydride again or used for leaching materials such as zinc arsenate-containing smoke dust to generate new arsenic hydride-containing gas, and therefore a closed-loop circulation process is formed; and efficient resource recovery and environment-friendly treatment are realized. The method is short in technological process, low in equipment requirement and small in energy consumption, the crude arsenic can be used as a precursor for preparing the high-purity arsenic, and a feasible scheme is provided for safety treatment and resource utilization of arsenic hydride in the industrial processes of metallurgy, wet refining and the like.

The invention discloses a method for efficiently separating arsenic from an arsenic-containing material through smelting of an oxygen-enriched side-blown molten pool. The treated arsenic-containing material, a flux and reduction coal are subjected to batching, a mixed material obtained after batching is continuously put into an oxygen-enriched side-blown molten pool smelting furnace, and oxygen-enriched air and gas fuel are blown into the smelting furnace for heating and high-temperature smelting; the materials are subjected to melting, reduction and slagging reaction in the smelting furnace; along with the reaction in the smelting furnace, the melt in the furnace is settled and layered, and alloy, sulfonium, furnace slag and high-temperature flue gas are obtained; generated alloy and sulfonium are discharged through a siphon port, and obtained slag is discharged through a slag discharging port; most arsenic and part of metal are volatilized and oxidized and enter high-temperature flue gas; and the generated high-temperature flue gas is subjected to cooling, high-temperature dust collection, shock cooling, low-temperature dust collection and tail gas treatment and then is discharged after reaching the standard. According to the method, the processes of matched treatment of the arsenic-containing materials, strengthened smelting and segmented dust collection are adopted, so that the arsenic content of the obtained crude arsenic oxide accounts for 70-75% of the total amount of the arsenic entering the furnace, the content of other metals is low, and the separation effect of the arsenic is good.

The invention discloses a flame-retardant master batch for a PVC cable material with low dust dissipation and high flame retardance and a preparation method of the flame-retardant master batch. The flame-retardant master batch is prepared from the following raw materials in parts by weight: 10-15 parts of polyvinyl chloride resin, 5-10 parts of a plasticizer, 1-3 parts of a filler, 1-2 parts of a stabilizer, 0.5-1.5 parts of a compatilizer, 0.2-0.5 part of a lubricant, 0.1-0.3 part of an antioxidant and 60-90 parts of a flame retardant. According to the invention, the powdery arsenic-containing flame retardant is prepared into PVC base material master batch particles, and a special compatilizer and a standardized production protection system are matched, so that the problem of dissipation of arsenic oxide dust is solved from the source; meanwhile, a low-temperature soft mixing process of an internal mixer is adopted, so that the high-content flame retardant is uniformly dispersed in the PVC base material; the prepared master batch is good in compatibility with the PVC cable material, the oxygen index can be remarkably increased by adding 3% by mass of the master batch, the flame-retardant efficiency and the production cost are both considered, the preparation process is stable, the problems of overmolding and scorching are avoided, and the industrial large-scale production requirement is met.

The invention provides a UAsTe single crystal and a preparation method thereof. The preparation method comprises the following steps: mixing a 238U raw material, an As raw material and a Te raw material according to an atomic ratio of 1: 0.8: (0.75-0.95), putting the mixture into the bottom of a gas-phase transportation pipe, and putting I2 as a gas-phase transportation agent into the bottom of the gas-phase transportation pipe; then, a quartz sealing piece is placed in the gas-phase conveying pipe for sealing, vacuumizing and heat sealing treatment; and putting the gas-phase conveying pipe into a double-temperature-zone tubular furnace, carrying out heat preservation treatment on the gas-phase conveying pipe after heating treatment, observing disappearance of light green in the conveying quartz pipe in the technological process, and finally cooling to room temperature to obtain the UAsTe single crystal. Compared with the prior art in which the stoichiometric ratio of UAsTe is 1: 1: 1, the method has the advantages that the raw material ratio is accurately regulated and controlled, and the double-temperature-zone gas-phase transportation parameters are optimized, so that the generation of toxic by-products such as uranium oxide and arsenic oxide is remarkably inhibited. According to the preparation method disclosed by the invention, the purity of the single crystal is improved by more than 30%, and meanwhile, stable growth of millimeter-scale large-size crystals is realized.

The application relates to the field of battery application target materials, and particularly discloses a zinc telluride target material and a preparation method and application thereof; the zinc telluride target material comprises the following raw materials in parts by weight: 95-99 parts of zinc telluride, 0.5-3 parts of a dopant, and 0.5-2 parts of a binder; the dopant is composed of modified arsenic oxide and modified antimony oxide; the modified arsenic oxide is prepared from arsenic oxide, amino carbon nanotube and polyethylene glycol solution at a mass ratio of 1:0.02-0.04:0.05-0.1; the modified antimony oxide is prepared from antimony oxide, carboxyl-modified porous boron carbide and polyethylene glycol solution at a mass ratio of 1:0.01-0.03:0.05-0.1; the preparation method comprises the following steps: after zinc telluride, the dopant and the binder are weighed and uniformly mixed, the initial mixture is obtained through pre-pressing; the initial mixture is subjected to temperature rising, pressure maintaining and temperature falling to room temperature to obtain a finished product; the application of the zinc telluride thin film; the target material has the advantages of high purity and high density, and the thin film has the advantage of high conductivity.

The invention provides an arsenic-containing anode slime treatment method which can comprise the following steps: drying arsenic-containing anode slime, and screening to obtain anode slime powder; and the anode slime powder and a reduction arsenic fixing smelting agent are mixed, reduction smelting is carried out in the inert atmosphere at the temperature of 400-500 DEG C till the reaction is finished, cooling is carried out to the room temperature, a product containing elemental arsenic is obtained, and the reduction arsenic fixing smelting agent is a mixture of carbon powder and metal Bi. According to the method, reduction smelting of solid arsenic can be achieved at low temperature, it is avoided that arsenic enters smoke in the form of arsenic oxide in a traditional method, and arsenic harm is avoided.

The present application relates to a method for separating arsenic and antimony based on gas phase oxidant, belonging to the field of nonferrous metallurgy and pollution control technology. The arsenic and antimony containing material is added into a reaction furnace, heated to a temperature of 923-1173K under a protective gas atmosphere, so that the arsenic and antimony containing material is melted or softened and forms a melt phase mainly containing antimony; under a temperature of 923-1173K, a gas phase oxidant is introduced into the reaction furnace to selectively oxidize arsenic to form volatile arsenic oxide and volatilize from the melt to obtain arsenic containing flue gas, and antimony remains in metallic state and is enriched in the melt phase to obtain antimony enrichment melt after arsenic removal; the arsenic containing flue gas is cooled to a temperature below 473K through heat exchange, and condensed dust or particulate matter is collected through a dust removal device to obtain an arsenic oxide enrichment phase; the introduction of the gas phase oxidant into the reaction furnace is stopped and a protective gas is introduced for purging, and the antimony enrichment melt after arsenic removal is cast to obtain antimony product. The present application has the advantages of short process, low reagent consumption, low energy consumption, controllable arsenic form, high grade antimony product and suitability for industrial continuous production, etc.

The utility model provides equipment for continuously generating elemental arsenic. The equipment comprises a refined white arsenic distillation furnace, a vertical carbon reduction furnace and a discharge heat exchanger, the refined white arsenic distillation furnace is provided with a distillation furnace material inlet, a distillation furnace tailing outlet, a distillation furnace gas outlet and a distillation furnace slag inlet. The vertical carbon reduction furnace comprises a furnace body, a furnace jacket, a slag receiving barrel and a movable cover. The furnace body is provided with a carbon powder inlet, a reduction furnace gas outlet, a gas inlet hole and a reduction furnace slag outlet. The furnace jacket is provided with a reduction furnace gas inlet; the reduction furnace gas inlet is connected with the distillation furnace gas outlet. The slag receiving barrel is provided with a barrel inlet and a barrel outlet. The barrel inlet is connected with the slag outlet of the reduction furnace, and the barrel outlet is connected to the distillation slag inlet. The movable cover is movably arranged in the slag receiving barrel in the vertical direction, and the movable cover comprises a blocking position and an opening position on the moving track of the movable cover. According to the equipment for continuously generating elemental arsenic, the refined arsenic distillation furnace can continuously generate gaseous arsenic oxide, and the gaseous arsenic oxide is continuously introduced into the vertical carbon reduction furnace, so that heat is effectively saved, and the working efficiency is improved.

The application discloses a method for recovering valuable metals tungsten and tin from hazardous waste tungsten slag, and aims at solving the problems that the existing method for recovering valuable metals from the tungsten slag needs a high temperature and the recovery rate of the valuable metals tungsten and tin needs to be improved. The recovery method comprises the following steps: S1, stirring and uniformly mixing tungsten slag powder with a reducing agent and a sulfidizing agent A; S2, placing the slag agent mixture of S1 in a tube furnace to perform high-temperature reduction treatment; S3, performing slag sulfuric acid leaching treatment; S4, repeatedly performing the high-temperature reduction treatment and the sulfuric acid leaching treatment for multiple times by taking the acid leaching slag as a sulfidizing agent B; and S5, stirring the tungsten-enriched sulfidized slag with sodium hydroxide and then roasting, obtaining a sodium tungstate solution through water leaching of the product, and finally evaporating and crystallizing. The valuable metal tin in the hazardous waste tungsten slag is extracted through high-temperature sulfidizing reduction. In the sulfidizing reduction reaction, tin is recovered, lead and arsenic oxides are oxidized to form sulfides, and the sulfides are separated from scheelite slag and enter the flue dust, and iron and manganese oxides are subjected to sulfidizing reduction reaction to enter the slag system, so that the hazardous waste is harmlessly treated.

The invention relates to a corrosion-resistant brass strip preparation and detection method, and relates to the technical field of brass strip preparation, and the corrosion-resistant brass strip preparation and detection method comprises the following steps: S1, purchasing and detecting raw materials; s2, preparing materials; s3, smelting and casting; s4, hot rolling; s5, intermediate treatment; s6, cold rolling; s7, surface treatment; s8, performance detection; s9, treating a finished product; and S10, packaging and warehousing. According to the preparation and detection method for the corrosion-resistant brass strip, by adopting an arsenic-free multi-element microalloying technology, toxic arsenic oxide generated in the smelting process of traditional arsenic-containing brass is successfully avoided, pollution to the environment is remarkably reduced, and the increasingly strict environmental protection regulation requirements are met; by optimizing alloy components and a surface treatment process, such as adding tin, aluminum, boron, rare earth elements and the like, and adopting ultrasonic cleaning and passivating treatment, the corrosion resistance of the brass strip is remarkably improved, the service life of the brass strip in high-humidity and high-salinity environments such as ocean is remarkably prolonged, and the requirements of high-end application fields such as ocean engineering and shipbuilding are met.

The present invention provides a harmless treatment method for arsenic-calcium slag, which includes: obtaining arsenic-calcium slag and pyrite, inputting the two into a mixer for mixing, and outputting a mixed material; obtaining the mixed material, inputting it into a medium-temperature volatilization furnace through a volatilization furnace material inlet, heating the mixed material at a medium temperature, outputting a first tail gas containing arsenic oxide through the volatilization furnace gas outlet, and outputting a first tail gas containing calcium arsenate and pyrite through the volatilization furnace tail slag outlet; obtaining the first tail gas, inputting it into a high-temperature decomposition furnace through a decomposition furnace material inlet, heating the first tail gas at a high temperature, outputting a second tail gas containing arsenic oxide and sulfur dioxide through the decomposition furnace gas outlet, and outputting a second tail gas containing calcium oxide and ferrosoferric oxide through the decomposition furnace tail slag outlet; and obtaining the first tail gas and the second tail gas, and inputting them into a tail gas purification device. In the harmless treatment method for arsenic-calcium slag of the present invention, the second tail gas does not contain arsenic, thereby avoiding arsenic pollution.

The invention discloses a composite clarifying agent for a glass substrate and a preparation method of glass, and belongs to the field of electronic glass production. The composite clarifying agent for the glass substrate is prepared from the following components in parts by weight: 20 to 25 parts of SnO2, 20 to 25 parts of NaCl and 50 to 60 parts of CaF2. The compound clarifying agent does not contain arsenic oxide and antimony oxide, is non-toxic and environment-friendly, and avoids leaching of harmful substances in the storage process. In addition, the adopted CaF2 can play a fluxing role, and melting of refractory materials such as quartz sand and the like is promoted at high temperature. Meanwhile, CaF2 and CaCl2 react and combine with NaCl at the temperature of 1500 DEG C or above, products such as CaCl2 remaining in molten glass are gasified and volatilized, CaF2 and CaCl2 can lower the viscosity of the molten glass and lower the surface tension of the glass at the high temperature, remaining bubbles are further removed, the clarification process is finally completed, and the composite clarifying agent is good in cascade relay clarification effect. Therefore, a product with a better clarification effect is obtained.

A two-step method for recovering tin and copper resources from copper slag using a gas-phase oxidation-reduction roasting process relates to the field of secondary resource recycling. First, the copper slag is ground and mixed with a slagging agent, and then fed into a smelting furnace for selective oxidation smelting. This allows the gaseous oxidant to undergo a selective oxidation reaction with the tin, lead, copper, arsenic, and sulfur phases in the copper slag. Tin, arsenic, and copper enter the slag phase, while most of the lead is distributed in the crude lead phase. Sulfur is oxidized to sulfur dioxide and enters the gas phase, achieving selective oxidation slag formation and efficient separation of tin and copper. The smelting slag and the reducing agent are then evenly mixed in a certain proportion and fed into a rotary kiln for reduction roasting. Tin, arsenic, copper, and other components in the smelting slag undergo simultaneous reduction reactions. Arsenic is reduced to arsenic oxide, which volatilizes and enriches in the smoke, while tin and copper remain in the roasting slag. Reduction smelting produces a copper-tin alloy, achieving efficient recovery of tin and copper resources from the copper slag. The method of the present invention has the advantages of simple operation and low cost, and has good prospects for promotion and application.

The invention discloses an arsenic in-situ growth-metal organic framework material which is arsenic oxide nanoparticles formed in situ on the surface of a metal organic framework material by performing ligand exchange on an arsenic compound and the metal organic framework material, the arsenic compound is selected from sodium arsenite, disodium arsenate heptahydrate, arsenic trioxide and the like; the metal organic framework material is selected from ZIF-8 and the like. The invention also discloses bionic nano-particles for in-situ growth of arsenic. The bionic nano-particles are formed by coating an arsenic in-situ growth-metal organic framework material with a cell membrane. The invention further discloses application of the arsenic in-situ growth-metal organic framework material and the bionic nanoparticles in preparation of drugs for treating cancers. The arsenic in-situ growth-metal organic framework material disclosed by the invention is bionic nano-enzyme with enzyme-like activity and dual epigenetic regulation and control effects, and is uniform in morphology and relatively small in particle size; and due to cell membrane coating, the bone marrow targeting property is realized, the problem of insufficient targeting property of an arsenic compound is solved, and the tumor immunotherapy effect is enhanced.

The invention provides a waste iron scrap reduction-low-temperature arsenic fixation and copper removal method which can comprise the following steps: drying and sieving arsenic-containing anode slime to obtain anode slime powder; the anode slime powder and the scrap iron are mixed and subjected to reactive smelting in the inert atmosphere at the temperature of 500-600 DEG C till the reaction is finished, a reduction smelting product is obtained, and the reduction smelting product is composed of a slag layer containing elemental copper and a metal layer containing elemental arsenic; and the metal layer is subjected to vacuum distillation, and metal contained in the arsenic-containing anode slime is recycled. According to the method disclosed by the invention, highly toxic and volatile arsenic oxide is reduced and elemental arsenic is fixed at low temperature by utilizing the scrap iron, so that secondary pollution of arsenic is avoided from the source, and harmless treatment is realized.

The utility model provides arsenic trioxide purification treatment equipment which comprises a purification furnace, the purification furnace is provided with a first inlet and a first outlet, and the purification furnace is used for purifying coarse arsenic trioxide in the purification furnace to obtain purified flue gas; the sedimentation device is communicated with the purification furnace through a first inlet and is used for carrying out sedimentation treatment on the purified flue gas entering the inner cavity of the sedimentation device so as to obtain sedimentation flue gas; the cooling device is communicated with the settling device and is used for reducing the temperature of settling flue gas flowing into the cooling device from the inner cavity of the settling device to a second preset temperature so as to obtain arsenic trioxide crystals. According to the present invention, with the equipment, the problem that the arsenic trioxide product content in the product is not stable due to the fact that the arsenic trioxide product content is not stable is solved, and the purity of the obtained arsenic trioxide is high and can achieve 99.5%.