145 results about "Arsenic oxide" patented technology

A kind of smelting method of aurin mine containing arsenic, it contains the following technology steps: primary burning, second-class burning, The burning residue after burning will be added into the pickling ark with the soot separated to be pickled. The filtrate will be used to extract copper, the filter cake will be separated and cyanide residue and golden mud can be gained, and the golden mud will be smelted to extract gold bullion. The character of it is that the smoke gas, which has been catch dust by primary burning and second-class burning, will be drew arsenic in according to hop-pocket drying method. The process is as following, the smoke gas containing arsenic will enter the spray cooling tower and be quench by spraying water, the arsenic oxide will become solid and be separated out from gaseous crystal, the smoke gas will take arsenic oxide solid into bag arsenic catcher, and the arsenic oxide solid will be collected into ash bucket after being filtrated by hop-pocket, and then will be packed and finished product can be gained. The smoke gas after arsenic catching will enter the acid making system, and produce vitriol by cleanse workshop section, translation workshop section and dried absorbing workshop section, the finished vitriol product will be gained, and the off-gas will be exhaled into air. The technology of it is simple and feasible, and it is easy to operate, the coefficient of recovery and arsenic catching rate are both high, the investment of it is low, and the running cost of it is low.

The invention relates to a glass for sealing with metal or alloy, wherein the mol ratio of its constituents being, 70.0% to 80.0% of silicon oxide, 0.0% to 4.0% of aluminium oxide, 12.0% to 19.0% of boron oxide, 0.0% to 4.0% of lithium oxide, 0.0% to 6.0% of sodium oxide, 0.0% to 8.0% of potassium oxide, 0.0% to 6.0% of magnesium oxide, 0.0% to 6.0% of calcium oxide, 0.0% to 6.0% of strontium oxide, 0.0% to 6.0% of barium oxide, 0.0% to 6.0% of zinc oxide, 0.0% to 6.0% of arsenic trioxide, 0.0% to 1.0% of cerium oxide. The glass has similar expansion coefficient, low air bubble generating number and low glass liquid phase temperature with the sealing metal.

A glass composition which is reduced in the amount of residual bubbles and is produced using smaller amounts of an environmentally unfriendly component such as arsenic oxide and antimony oxide. This glass composition contains, in terms of mass %: 40-70% SiO₂; 5-20% B₂O₃; 10-25% Al₂O₃; 0-10% MgO; 0-20% CaO; 0-20% SrO; 0-10% BaO; 0-0.5% Li₂O; 0-1.0% Na₂O; 0-1.5% K₂O; and 0-1.5%, excluding 0%, Cl, Li₂O+Na₂O+K₂O exceeding 0.06%. The glass composition can be produced suitably using, for example, a chloride as part of the raw glass materials.

The invention provides high-strength alkali-aluminosilicate glass. The alkali-aluminosilicate glass is characterized by excellent meltability, fineability and processibility. The alkali-aluminosilicate glass is showed in the following formula: 60.5 to 69.0 weight percent of SiO2; 7.0 to 11.8 weight percent of Al2O3; 0 to 4.0 weight percent of B2O3; 2.0 to 8.5 weight percent of MgO; 0 to 4.0 weight percent of CaO; 0 to 5.0 weight percent of ZnO; 0 to 3.0 weight percent of ZrO2; 15.0 to 17.5 weight percent of Na2O; 0 to 2.7 weight percent of K2O; 0 to 2.0 weight percent of Li2O; and 0 to 1.5 weight percent of a fining agent such as As2O3, Sb2O3 CeO2, SnO2, Cl-, F-, (SO4) 2- and combinations thereof. The glass allows for adequate conditions for an alkali ion exchange treatment in a short time period (4 to 8 hours) and can also be produced according to the established, continuous, vertically downward directed drawing process such as the overflow down-draw method or the fusion method, the die slot or the slot down-draw method, or combinations thereof. The viscosity-temperature profile of the glass allows the use of the conventional fining agents in combination at the lowest amounts possible and additionally allows the production of the glass that are free of or contain only small amounts of either or both of antimony oxide and arsenic oxide.

The invention discloses a method for purifying and recovering valuable metal by copper electrolyte. The method comprises the following steps: (1) evaporating, crystallizing and filtering the copper electrolyte to recover copper sulfate; (2) adding arsenic sulfide slag into copper electrolysis filtrate, and filtering to recover copper sulfide and antimony sulfide after a reaction is finished; (3) evaporating, crystallizing and filtering the copper electrolysis filtrate to separate arsenic oxide and bismuth oxide; (4) selectively leaching and recovering bismuth in the step (3); (5) efficiently vulcanizing the copper electrolysis filtrate for deep arsenic removal; (6) performing diffusion dialysis on the copper electrolysis filtrate to separate and recover sulfuric acid; (7) recovering nickle in a diffusion dialysis stock solution by adopting a neutralization precipitation method. The method adopts a wet method in the whole process, is efficient, environment-friendly and energy-saving, and has better application value.

The invention relates to a method for recovering tin, antimony and lead and enriching indium from tin residue, which comprises the following steps: tin residue powder containing tin, antimony, lead, indium and arsenic oxide uses mixed liquor of hydrochloric acid, sodium chloride and hydrazine hydrate as a leaching agent, carries out electric potential control and two step countercurrent to recoverleached antimony, one-step leaching agent is neutralized and hydrolyzed to output crude antimony oxide, lead can be leached by sodium chloride solution in two-step leaching residue; after lead is leached, the liquor is cooled and crystallized to obtain lead chloride; after lead is leached, sodium is washed out in residue to obtain high indium tin concentrate containing 49.52-55.69wt% of tin and 1.04-1.2wt% of indium. The purities of crude antimony oxide and crude lead chloride are respectively 93.58wt% and 99.67wt%; the recovery efficiencies of tin, antimony, lead and indium respectively reach up to 98.68wt%, 84.616wt%, 95.136wt%, and 95.3wt%. The method has the advantages of short flow, good separation effect and good working conditions.

The invention discloses a black high-strength microcrystal glass, which comprises the following parts: 70% SiO2, 3. 5% Lithia, 17% alumina, 0.1%-0.5% ferric trioxide, 0.5%- 1% cobalt trioxide, 0.5%-1% nickel trioxide, 3. 1% -3. 5% at least one of titania, zirconia and phosphorus pentoxide, 1%-1. 5% at least one of magnesia, zinc oxide, barium oxide and boric oxide, 2. 0%-2. 1% potassium oxide and or sodium oxide and 1% arsenic oxide and or antimony oxide. The making method of microcrystal glass comprises the following steps: grinding evenly; adding reducer to allocate composite material; fusing under 1580 -1650 deg. c; shaping; annealing; coring under 600-800 deg. c for 1-4h; heating to 700-1000 deg. c to crystallize for 1-12h.

The low temperature molded optical glass consists of P2O5 9-25 wt%, GeO2 1-20 wt%, Nb2O5 12-28 wt%, TiO2 1-7 wt%, Bi2O 30-55 wt%, WO3 0-38 wt%, SiO2 0-3 wt%, B2O3 0-5 wt%, Al2O3 0-2 wt%, Ta2O5 0-3 wt%, Sb2O3 0-1 wt%, R2O not more than 13 wt%, where R is Li, Na and/or K, and XO not more than 15 wt%, where X is Ca, Sr, Ba and/or Zn. The low temperature molded optical glass contains no lead oxide, arsenic oxide and other environment harming components, and has easy production and no devitrification within the temperature range near the softening point.

The present invention provides a glass composition that uses a small amount of arsenic oxide or antimony oxide, which has a large environmental load, and has few residual bubbles. The glass composition contains, in mass %, SiO2: 40-70%, B2O3: 5-20%, Al2O3: 10-25%, MgO: 0-10%, CaO: 0-20%, SrO: 0-20 %, BaO: 0-10%, Li2O: 0-0.5%, Na2O: 0-1.0%, K2O: 0-1.5%, Cl: more than 0% and 1.5% or less, Li2O+Na2O+K2O is more than 0.06% scope. The glass composition can preferably be produced by using chloride as part of the glass raw material.

The invention discloses a method for enriching and recycling bismuth from waste acid sulfide residues. The method comprises the following steps: 1) adding the waste acid sulfide residues into copper electrolyte, controlling reaction conditions, introducing bismuth and arsenic in the waste acid sulfide residues into a solution, replacing and enriching sulfides in copper waste acid sulfide residues in electrolyte to obtain copper sulfide residues; 2) evaporating and concentrating the solution which is rich in bismuth and arsenic in step 1), and separating out a mixture of bismuth oxide and arsenic oxide from the solution by crystallizing the solution after cooling the solution; 3) adding sodium chloride into sulfuric acid to selectively leach bismuth in the mixture of the bismuth oxide and the arsenic oxide, and filtering the mixture to bismuth-rich leaching liquor; and 4) regulating the pH value of the bismuth-rich leaching liquor for neutralizing and hydrating the bismuth-rich leaching liquor to generate bismuth chloride oxide precipitates, standing the bismuth chloride oxide precipitates for certain time, filtering the bismuth chloride oxide precipitates to obtain bismuth chloride oxide and tail liquor, and returning the tail liquor into a solution which is rich in bismuth and arsenic in the step 1) for circulating. The method not only can realize recycling waste acid sulfide residues in a smelting system, but also efficiently enriches and recycles the bismuth, and has a relatively high practical value.

Transparent, dyed cook top or hob with improved color display capability, consisting of a glass ceramic with high quartz mixed crystals as predominant crystal phase, whereby the glass-ceramic contains none of the chemical refining agents arsenic oxide and/or antimony, with transmission values of greater than 0.1% in the range of the visible light within the entire wavelength range greater than 450 nm, a light transmission in the visible of 0.8-2.5% and a transmission in the infrared at 1600 nm of 45-85%.

The invention provides a treatment method for arsenical waste liquid, which comprises the following steps: (A) performing sulfurization treatment of arsenical waste liquid to obtain arsenic-sulfur-copper mixed slag; (B) performing concentrated sulfuric acid oxidation treatment of the arsenic-sulfur-copper mixed slag to obtain sulfur precipitate and mother liquid; (C) recycling the sulfur precipitate to prepare concentrated sulfuric acid and/or a sulfurization agent, performing crystallization treatment of the mother liquid to separate out arsenic oxide, and continuing to perform purification treatment of arsenic oxide; and (D) enabling the mother liquid subjected to crystallization treatment to circulate back to step (A) to be mixed with arsenical waste liquid repeatedly, and directly extracting elemental copper from the mother liquid when the copper element enrichment concentration in the mother liquid is up to 100-120 g/L. The treatment method for arsenical waste liquid, provided by the embodiment of the invention, is simple, is easy to operate has mild operation conditions, realizes safe and innocent treatment of arsenic pollution, can recycle elemental metal from waste liquid and creates a certain economic value.

The invention relates to an apparatus and a process method for preparing simple substance arsenic by continuously reducing arsenic oxide. The apparatus comprises an arsenic oxide negative pressure feeding system, a reducing bin, a continuous unloading system, a reducing furnace and a product discharging device. The above systems are connected according to a production flow. The process is a method for preparing the simple substance arsenic by continuously reducing arsenic oxide based on the above apparatus. The apparatus is simple in structure, convenient for use and operations and short in preparation flow, and can prepare a great amount of the simple substance arsenic by continuous reduction rapidly and effectively. The apparatus for continuously reducing high pure arsenic oxide by once heating without cooling effectively overcomes the problems in intermittent arsenic oxide reduction by repeated heating and cooling.

The invention provides a comprehensive recovery method for arsenic in arsenic sulfide residues and a smoke leaching liquid in copper smelting. The smoke leaching liquid and the arsenic sulfide residues are subjected to normal-pressure vulcanization copper precipitation treatment to obtain solid state copper sulphide and a vulcanized liquid; the vulcanized liquid is discharged into a reaction tankII, and sulfur dioxide is introduced into the reaction tank II to make the vulcanized liquid converted into an arsenic-containing mother liquid; the arsenic-containing mother liquid is discharged intoa reaction tank III, the arsenic-containing mother liquid is subjected to concentration and crystallization, and filtration is performed to obtain a sulfate mixed crystal and a concentrated liquid; the sulfate mixed crystal is added into a reaction tank IV, copper sulfate and zinc sulfate in the sulfate mixed crystal are dissolved into water, and filtration is performed to obtain arsenic oxide and a solution of the copper sulfate and the zinc sulfate. The method provided by the invention has the advantages that the process collocation is reasonable, parameters in each process are strictly controlled, the arsenic can be safely disposed, and valuable elements such as copper, lead and zinc are recycled and effectively utilized, the purposes of environmental protection, economy, energy conservation and a high resource utilization rate are achieved, and harmlessness and resource utilization maximization of the arsenic are realized.