33results about How to "Eliminate pollution hazards" patented technology

The invention relates to a multi-grade gold-solver-copper-zinc enriching and comprehensive recovering method for cyanide gold refining waste residues. The multi-grade gold-solver-copper-zinc enriching and comprehensive recovering method for the cyanide gold refining waste residues comprises the following steps that the first grade is a technology that decyanation is conducted after mixing cyanide gold refining waste residues, high-temperature hot residues generated by roasting acid-making and purifying warm dilute acid slurry mixing; the second grade is a gold-solver-sulfur-concentrate floating-selecting and enriching technology by using high efficiency mixing activator and floating agents; the third grade is a technology for iron ore concentrate generated through floating-selecting tailing magnetic-separation; the fourth grade is a technology for producing the iron ore concentrate by floating-selecting gold-solver-sulfur-concentrate, high-temperature roasting acid-making and enriching gold-solver-iron; the fifth grade is a wet-process gold-silver leaching technology for the iron ore concentrate by using environmental protection agents; the sixth grade is a precipitating enriching technology for gold and silver in leaching liquid; and the seventh grade is a comprehensive precipitating recovering recycling technology for copper and zinc in the leaching liquid after gold-silver extraction. According to the multi-grade gold-solver-copper-zinc enriching and comprehensive recovering method for the cyanide gold refining waste residues, the pollution and damages of the cyanide gold refining waste residues on surround environment are removed, through the multi-grade enriching technology, gold, solver, copper and zinc in the cyanide gold refining waste residues can be recovered comprehensively and integratedly, and the objectives of comprehensive processing and recovering, cyclic utilization and economic and environmental protection can be achieved.

The invention relates to a method for treating alkaline gold-extraction tailings by utilizing acid making tail gas. The method is simple and fast in process flow, fully utilizes the acid making tail gas and alkaline gold-extraction tailings to change wastes into valuables, the problems that the acid making tail gas is purified and absorbed and the alkali liquor neutralizing treatment cost is high can be solved, the purpose of standard emission can be achieved, furthermore gold and silver valuable metals in the alkaline gold-extraction tailings can be recovered, the pollution hazard of the alkaline gold-extraction tailings to the ambient environment can be eliminated to achieve energy conservation, economy and environment friendliness, and the economic benefits of enterprises can be improved.

The invention relates to a method for treating cyanidation tailing solidified dry heaping by using waste acid. The process flow is simple, and waste acids (diluted acids) generated in acid production through flue gas calcination react with cyanidation tailings. Cyanidation tailings treated through the method make the waste acids generated in acid production be further applied, acidolysis and floatation technologies comprehensively recover valuable metals gold, silver and copper and eliminate harms of cyanides in the cyanidation tailings, a high temperature calcination technology comprehensively utilizes neutral residues generated in the acid production waste acid neutralization treatment, and calcination products are solidified pellets, and can be directly transported to a stacking place and are rolled and filled, so pollution harms to surrounding environment are eliminated, the purposes of energy saving, economic property and environmental protection are reached, and the economic benefit of enterprises is improved.

The invention discloses a blade spring composite cover plate. The blade spring composite cover plate comprises frameworks, the upper end surfaces of the frameworks are matched with an inner bend section of a U-shaped bolt, the frameworks are arranged in a matrix made of a fiber-reinforced polymer material and are made of a metal material, the lower end surfaces of the frameworks are flush with thelower end surface of the matrix, and the upper end surfaces of the frameworks are exposed out of the surface of the matrix. According to the blade spring composite cover plate, the upper surfaces ofthe frameworks are matched with the inner bend section of the U-shaped bolt and transmit the vertical static / dynamic load from the U-shaped bolt, the load borne by the upper surfaces of the frameworksare jointly borne by the frameworks and the matrix in the cover plate, the frameworks adopt the metal material, so that high structural strength and rigidity can be ensured, the matrix adopts the fiber-reinforced polymer material, the elastic modulus is small, the specific strength is high, and the effects of buffering and dispersing the load are obvious; and moreover, the high polymer material is light in weight, the weight reduction rate of the overall composite cover plate compared with that of a traditional cast iron blade spring cover plate is greater than or equal to 50%, and the lightweight design can be realized.

The present invention is applicable to the textile field, and provides a hot-melt non-adhesive nylon Velcro and its manufacturing method. Melt at a high temperature and make the adjacent nylon filaments bond together. By adopting this structure of the hook and loop fastener, it can not only achieve the purpose of no burr when cutting, and no loosening during use, but also does not need to coat the bottom of the hook and loop fastener Polyurethane resin glue technology avoids the harm of environmental pollution caused by the volatilization of organic solvents into the air during drying, and realizes that the hook and loop fastener is breathable and thin, and there is no problem of hydrolysis of the glue when used in water.

The invention relates to a method for treating alkaline gold-extraction tailings by utilizing acid making tail gas. The method is simple and fast in process flow, fully utilizes the acid making tail gas and alkaline gold-extraction tailings to change wastes into valuables, the problems that the acid making tail gas is purified and absorbed and the alkali liquor neutralizing treatment cost is high can be solved, the purpose of standard emission can be achieved, furthermore gold and silver valuable metals in the alkaline gold-extraction tailings can be recovered, the pollution hazard of the alkaline gold-extraction tailings to the ambient environment can be eliminated to achieve energy conservation, economy and environment friendliness, and the economic benefits of enterprises can be improved.

The invention discloses safe high efficiency complex type anti-fungicide paper and its manufacturing method. It is used the common kraft as base paper. One surface of the base paper is painted or spayed one layer complex type anti-fungus agent formed by o-phenyl phenyl phenol, benzoic acid, nipalgin propyl ester, and sorbic acid. The complex type anti-fungus agent layer is painted one layer complex type adhesion agent contained anti-fungus agent propionic acid, carbendazim, and vitamin E or C, and antioxidant complex type adhesion agent. The manufacturing method includes the following steps: selecting base paper; preparing and painting and spraying complex type anti-fungus; preparing and painting and spraying complex type adhesion agent. The anti-fungicide paper is no odor and peculiar smell, not influenced by environment, and no harm for people and animal. It can be applied to mould proofing of tobacco and its products, foods, forage, and so on.

The invention relates to a method for treating cyanidation tailing solidified dry heaping by using waste acid. The process flow is simple, and waste acids (diluted acids) generated in acid production through flue gas calcination react with cyanidation tailings. Cyanidation tailings treated through the method make the waste acids generated in acid production be further applied, acidolysis and floatation technologies comprehensively recover valuable metals gold, silver and copper and eliminate harms of cyanides in the cyanidation tailings, a high temperature calcination technology comprehensively utilizes neutral residues generated in the acid production waste acid neutralization treatment, and calcination products are solidified pellets, and can be directly transported to a stacking place and are rolled and filled, so pollution harms to surrounding environment are eliminated, the purposes of energy saving, economic property and environmental protection are reached, and the economic benefit of enterprises is improved.

The invention discloses a non-asbestos high-temperature-resistant clutch surface patch and a manufacturing method thereof. The non-asbestos high-temperature-resistant clutch surface patch is prepared from the following raw materials in parts by weight: 25-35 parts of modified fibers, 6-8 parts of copper fibers, 3-5 parts of aramid fibers, 20-30 parts of acrylonitrile-butadiene rubber, 10-20 parts of phenolic resin, 2-4 parts of a vulcanizing agent, 3-5 parts of an anti-ageing agent, 10-14 parts of graphite, 8-12 parts of barite powder, 6-8 parts of nano silicon dioxide and 3-5 parts of nano titanium dioxide. The non-asbestos high-temperature-resistant clutch surface patch disclosed by the invention does not contain asbestos, and eliminates contamination hazard of the asbestos; and moreover, high temperature resistance is excellent, a friction coefficient is not obviously reduced under a high-temperature condition, and abrasion is relatively low.

The invention relates to a method for comprehensively recovering gold mud wet technology tail gas, and belongs to the technical field of the treatment, the comprehensive utilization and the gold and silver recovery of the smelting exhaust-gas in the wet gold smelting industry. The method adopts the steps of gold mud preparation, gold mud acid dipping, tail gas absorption, carbon adsorption, and carbon-adsorbed liquid comprehensive utilization to recover the valuable elements of gold, silver and the like in the gold mud wet technology tail gas, and an alkaline circulating waste liquid obtained after the adsorption recovery of the gold and silver by active carbon is directly used for a cyanidated tail residue flotation lead enriching technology as a lead system selecting liquid to further recover other elements comprising lead and the like, so the pollution harms of the alkaline circulating waste liquid to the surrounding environment are eliminated, and the purposes of energy saving, economy, environmental protection and effective comprehensive control are realized.

The invention discloses an environment restoring method for manufacturing an ecological crust by adopting anaerobic digestion residuals. The method comprises the following steps of: 1) obtaining a substrate: performing solid-liquid separation on the anaerobic digestion residuals by utilizing a solid-liquid separation device to obtain biogas residues; 2) adjusting the substrate: adding auxiliary materials, such as medical stone and water-retaining agent, into the biogas residues, and mixing uniformly; 3) forming the crust: placing the materials into a mould and pressing into the crust; and 4) outdoor paving: placing seeds into a seedling culture cave of the crust, placing the crust into different vertical habitats according to environmental condition to enable the seeds to automatically sprout and grow, and with the growth of the seedling and the weathering of the crust, integrating the plant, crust and soil into a whole. The method provided by the invention has the advantages of simpleness and easiness in operation, convenience in operation, environment-friendly property, and resource-saving property, and is suitable for the control of desertification and the restoring, rebuilding and improving practice of local ecology.

The present invention relates to a medical protection article, and especially relates to an anti-radiation surgical gown. The anti-radiation surgical gown has a right side and a back side; the right side has a left half and a right half; the left half shields the right half to form an overlap area; the left half and the right half are internally equipped with lead rubber; a fiber mesh is attached to the exterior of the lead rubber; and the fiber mesh is equipped with an adhesive port. The airtight fiber mesh is adopted by the anti-radiation surgical gown to enclose the lead rubber and prevent communication with the outside, hidden danger of lead pollution is completely eradicated, a wearer can be completely kept clear of the lead rubber, and safety and practicality of the anti-radiation surgical gown are embodied.

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 discloses a method and a device for cultivating high-concentration photosynthetic bacteria with low illumination. The device comprises an anode chamber and a cathode chamber, wherein the anode chamber is made from a transparent material, and is separated from the cathode chamber through an ion exchange membrane; the anode chamber and the cathode chamber are respectively provided with an anode and a cathode; the anode and the cathode are connected through an external resistor; the ratio of surface area of the anode to effective capacity of the anode chamber is more than 0.06 / cm, and ratio of resistance of the external resistor to effective capacity of the anode chamber is 4-40 ohm / cm3; the anode chamber of the device is a fermentation tank; photosynthetic bacteria cultivated to a logarithmic phase are inoculated to the anode chamber at a volume percentage of 1-10%, and the anode chamber is sealed and is communicated to an external circuit to cultivate the bacteria at 20-37 DEG C with illumination of 50-500lux. The method disclosed by the invention can cultivate high-concentration photosynthetic bacteria under low inoculum size and low illumination, and can generate electric energy while reducing illumination energy consumption; and the method is wide in application prospect.

The invention belongs to the field of environmental protection; and aiming at problems of high quantity, complex components and no proper process treatment of mercury-contained tailings generated by nonferrous metal mines and nonferrous smelting enterprises in a production process, the invention discloses a method for recovering mercury from the mercury-contained tailings through complexing extraction and consolidating decomposition. The method comprises the following steps: the complexing extraction is performed for the mercury-contained tailings by adopting mixed solution of thiosulfate and selenium generation of sulfate, so that transfer-state mercury in the mercury-contained tailings is transferred into leaching agent; and the consolidating decomposition is performed for the mercury in the leaching agent and a complex, formed by a thiosulfuric acid radical and a selenium generation of sulfuric acid radical, through a method of heating and feeding carbon dioxide gas, so that the mercury is finally converted to stable mercury sulfide / mercury selenide to form precipitates. The method is simple in operation; and the transfer-state mercury in the mercury-contained tailings is converted to a form of mercury sulfide and / or mercury selenide precipitates with low solubility, high stability and low toxicity, so that the pollution harm of the mercury in the mercury-contained tailings to environment is effectively reduced.

The invention discloses a pulse rising type system for continuously recovering mercury from mine tailings. The system comprises a slurry preparation unit, a rising extraction unit, a flocculation separation unit and a solvent regeneration unit. The invention further comprises a pulse rising type process for continuously recovering the mercury from the mine tailings. The process comprises the following steps of slurry preparation, rising extraction, flocculation separation and solvent regeneration. According to the pulse rising type system and process for continuously recovering the mercury from the mine tailings, the pulse rising type system for continuously recovering the mercury from the mine tailings adopts a riser reactor for liquid-solid extraction for the first time, the riser reactor is composed of thick sections and fine sections in a staggered mode, so that the material backmixing degree is greatly enhanced, due to the fact that a baffle plate is arranged inside the riser reactor, the staying time is prolonged, the extraction is more thorough, the extraction efficiency is higher, and the pollution hazard of the mercury in the mercury-containing tailings to the environmentis greatly reduced; and a sodium thiosulfate solution for extracting the mercury is subjected to heating and bubbling of carbon dioxide, so that decomposition is enhanced, and thiosulfate after mercury decomposition is converted into a mercury sulfide precipitation form which is low in solubility, high in stability and low in toxicity.

The invention relates to a method and product for purifying air, which is a method and product combining a chemical method and a physical method for eliminating harmful chemical gases. Formaldehyde and other toxic gases, and products developed based on this method. Purification step: the step of polymerizing or decomposing formaldehyde by using cellulose impregnated with formaldehyde remover; the step of absorbing other harmful gases by using the substance with adsorption ability. The product for air purification is: the outer layer is a decomposing layer of fibrous material, the inner layer is a chemical package of active substances with adsorption capacity, and the fibrous material contains liquid medicine for decomposing and eliminating harmful gases. The invention utilizes the adsorption force of activated carbon to adsorb harmful substances in the air into the bag. When the formaldehyde in the air passes through the decomposition layer, the pharmaceutical components of the decomposition layer rapidly decompose or polymerize it, while the activated carbon adsorbs other harmful gases.