64 results about "Lead(II) sulfate" patented technology

The invention relates to a technology for recovering metallic copper from high-lead copper matte, and belongs to the nonferrous metallurgy and wet metallurgy fields. The technology comprises the following steps: breaking and grinding high-lead copper matte to below 100 meshes, mixing the ground high-lead copper matte with an ammonium carbonate solution to prepare a pulp, adding a proper amount of ammonia water, and pre-leaching under a controlled pH value condition; pumping the ore pulp obtained after the above reaction into an autoclave, and adjusting the liquid-solid ratio to 6-10:1; letting in ammonia and high-pressure oxygen, and controlling the oxygen pressure between 0.1MPa and 1.2MPa and the total pressure between 1.0MPa and 3.7MPa; carrying out high-pressure ammonia system oxidizing leaching at a leaching temperature of 160-240DEG C; carrying out liquid-solid separation, and allowing the obtained solution to undergo ammonia steaming in order to recover ammonia and carbon dioxide; floating the obtained filter residues to recover lead sulfate; and sending the precipitate obtained after the ammonia steaming operation to a solution tank, carrying out dilute acid leaching treatment to recover copper sulfate in the precipitate, purifying to remove impurities, sending to an electro-deposition system, and recovering to obtain a product cathode copper.

The invention discloses a method for separating selenium, tellurium, arsenic, copper, lead and silver and enriching gold from copper anode mud, and relates to the technical field of rare and preciousmetal metallurgy. The method comprises the following steps that roasted products obtained through low-temperature oxidization roasting of the copper anode mud and sodium hydroxide react to obtain selenium, tellurium and arsenic containing leaching liquor and alkaline leaching slag; the leaching liquor and whitewash react to obtain a selenium and tellurium containing solution and calcium arsenate slag; the alkaline leaching slag and sulfuric acid react to obtain copper sulfate and acid leaching slag; sulfuric acid and the selenium and tellurium containing solution react to obtain telluric acidand a selenium containing solution; the acid leaching slag and nitric acid react to obtain a silver nitrate solution and lead and gold slag; silver nitrate and hydrochloric acid react to obtain silverchloride and nitric acid; the lead and gold slag and a sodium carbonate solution react to obtain carbonization slag and a sodium sulfate solution; the carbonization slag and nitric acid react to obtain a lead nitrate solution and gold containing enrichment; and the lead nitrate solution and sulfuric acid react to obtain a lead sulfate and sulfuric acid solution. The method aims to solve the problems that existing methods for recycling metal from copper anode mud, the cost is high, recycled metal is single, and the comprehensive recovery effect is poor.

The invention relates to a method for separating copper from lead matte and comprehensively utilizing lead matte, and belongs to the field of wet metallurgy of non-ferrous metals. The process is characterized by adding hydrogen peroxide under a hydrochloric acid system for oxidization leaching. The method is as follows: ball-milling lead matte blocks until grain size is lower than 100 meshes, and feeding the ball-milled lead matte into a leaching slot for carrying out oxidization leaching, wherein HCl concentration is controlled to 1mol/L-6mol/L, concentration of hydrogen peroxide is controlled to 0.5mol/L-3.5mol/L, a liquid-solid ratio is controlled to (3-10):1, a temperature is controlled to 60-90 DEG C and reaction time is controlled to 1-2 hours. Under a hydrochloric acid condition, hydrogen peroxide is utilized and used as an oxidant for leaching sulfide; in the oxidization leaching process, sulfur in the lead matte is oxidized into elemental sulfur or sulfate radical, copper is oxidized to enter liquor in the form of ion, and lead is left in slag with gold and sliver in the form of lead chloride or lead sulfate. After the leaching process is completed, solid-liquid separation is carried out to realize preliminary separation of copper and lead. Copper-rich leachate can replace deposited copper by adding scrap iron, and leaching residue is returned to a pyrogenic process lead refining system for recycling valuable elements such as lead, sliver, elemental sulfur, and the like.

The invention discloses a method for recycling lead from a lead-containing waste material. The method comprises the following steps of: (1) making the lead-containing waste material and a complexing agent water solution react to make sure that lead oxide and/or lead sulfate in the lead-containing waste material are/is completely dissolved, and separating a lead-ion-containing liquid supernatant from the precipitates containing no lead salt after reaction is ended; (2) making the liquid supernatant and a precipitant react so that the lead ions in the liquid supernatant are completely precipitated, and separating the lead-salt-containing precipitates from a regenerated complexing water solution after reaction is ended; and (3) making the lead-salt-containing precipitates and an electrolyte Awater solution have dissolution reaction to make sure that the lead-salt-containing precipitates are completely dissolved and a lead-containing electrolyte B and a precipitant are generated after reaction is ended, recycling the precipitant, and making the lead-containing electrolyte B have electrolytic reaction to obtain metallic lead, oxygen and a regenerated electrolyte A. according to the method disclosed by the invention, the complexing agent, the precipitant and the electrolyte A used in a recycling process can be repeated recycled; the method satisfies the characteristics of atomic economic reaction, so the method realizes zero consumption and zero emission and lowers the production cost.

A disclosed concrete impact-resistant modifier is prepared from the following raw materials in parts by weight: 1.5-4.7 parts of tribasic lead sulfate, 2.5-4.5 parts of cellulose acetate, 1.2-3.3 parts of rosin-polythylene oxide ester, 1.2-1.9 parts of sodium methyl silicate, 1-3 parts of sodium poly(methylidyne naphthalenesulfonate), 2-3.5 parts of artificial ceramic particle, 0.5-1.3 parts of zinc hydroxide, and 5-10 parts of deionized water. Through the combined effect of the two flexible materials tribasic lead sulfate and cellulose acetate, the concrete possesses high compression resistance, high bending-resistant strength and high impact-resistance flexibility, the elastic modulus of concrete is effectively reduced, the damping ratio of concrete is improved, possibility is provided for vibration damping and noise reduction of concrete pavements, durability of flexible concrete is improved, and the service life of the structure is prolonged.

This invention relates to a new battery oxide mixture for use in lead acid batteries and/or battery plates, specifically tetrabasic lead sulphate and lead oxide mixture that is derived through basic reactions from lead sulphate and the method utilized to obtain the said tetrabasic lead sulphate and lead oxide mixture by basic reactions starting by lead sulphate as initial substance. Additionally, this invention relates to battery plates produced wherein the paste made of tetrabasic lead sulphate and lead oxide mixture is plastered on lead battery grids.

The invention relates to electrolyte for manufacturing an emulsion storage battery and a manufacturing method thereof. The electrolyte for manufacturing the emulsion storage battery in the invention comprises a mother liquid consisting of the following components in parts by weight: 1-1.3 parts of SiO2.nH2O with 30-45wt% SiO2, 7-11 parts of diluted sulphuric acid or carbonic acid, and 1.1-2.5 parts of pure water, wherein the mother liquid is treated by a high-pressure magnetic field to prepare the electrolyte containing saturated magnetic flux. The electrolyte containing the saturated magnetic flux in the invention has the characteristics of small internal resistance, low generation temperature, reduced losses, electricity saving performance and short formation time; when the emulsion storage battery manufactured by adopting the electrolyte is used, the electrolyte does not corrode polar plates, the emulsion storage battery is free from boosting charge after long-term storage and can still be started normally, and no acid mist and no pollution of harmful water containing sulfate are generated in a production process; in addition, the emulsion storage battery manufactured by adopting the electrolyte has the advantages of large applicable temperature range and long service life, cannot result in environment pollution after being used and is a truly environment-friendly and energy-saving product.

The invention relates to a method for determining the content of lead in a silver alloy and belongs to the technical field of analytical chemistry. The method comprises dissolving a sample through nitric acid, adding sulfuric acid into the solution so that the lead forms lead sulfate precipitates and is separated, and carrying out titration in an acetic acid-sodium acetate buffer solution to meteron the lead content of the alloy through EDTA. The method is simple and rapid, has a wide measuring range, realizes accurate measurement, compensates for the blank of high-content lead analysis in the silver alloy, provides the technical support for analysis and determination of silver products in the precious metal field, is suitable for testing and analysis of large-volume samples, and can be widely applied in the ore test and analysis field.

The invention relates to the field of asphalt, and particularly discloses modified asphalt capable of prolonging the service life of an asphalt pavement, and the modified asphalt is prepared from the following raw materials in parts by weight: 80-120 parts of matrix asphalt, 15-20 parts of buton rock asphalt, 3-5 parts of a surfactant, 3-5 parts of a compatilizer, 10-15 parts of potassium titanate, 5-7 parts of lead sulfate tribasic and 5-7 parts of bentonite. The preparation method comprises the following steps: S1, mixing 80-120 parts of matrix asphalt and 15-20 parts of buton rock asphalt, heating to 180 DEG C, shearing for 2 hours, and uniformly stirring; s2, continuously adding 3-5 parts of a surfactant, 3-5 parts of a compatilizer, 10-15 parts of potassium titanate, 5-7 parts of lead sulfate tribasic and 5-7 parts of bentonite, and uniformly stirring to obtain a modified asphalt finished product; the preparation method provided by the invention has the advantage of improving the anti-aging performance of the asphalt.

The invention discloses a low-foaminess PVC section bar used for door and window frames. The low-foaminess PVC section bar comprises following ingredients, by mass, 100 parts of PVC, 2 to 6 parts of titanium dioxide, 1 to 3 parts of AC foaming agent, 0.1 to 1 part of UV-9, 2 to 5 parts of paraffin, 10 to 15 parts of CPE, 0.1 to 0.5 part of PE wax, 2 to 5 parts of tribasic lead sulfate, 2 to 4 parts of dibasic lead phosphate, 8 to 10 parts of a modifier, 5 to 10 parts of calcium carbonate, 0.5 to 1 part of calcium stearate, and 0.5 to 2.5 parts of lead stearate. Product relative density ranges from 0.75 to 0.85, tensile strength ranges from 30 to 40MPa, bending elasticity modulus range from 35 to 40MPa, bending rupturing load ranges from 14000 to 15000MPa, bending strength ranges from 35 to 45MPa, and elongation ranges from 25 to 30%. The low-foaminess PVC section bar possesses light resistance and ultraviolet irradiation resistance, and can be used for replacing existing materials continuously; and large-scaled production can be realized.

The invention relates to a high-strength life buoy. The life buoy is prepared from the following raw materials in parts by weight: 60-110 parts of polypropylene, 0.8-1.2 parts of a cross-linking agent, 22-30 parts of a foaming agent, 1.5-3.5 parts of zinc oxide, 0.12-0.18 part of tribasic lead sulfate, 0.15-0.19 part of a demolding agent stearic acid and 30-46 parts of calcium carbonate. The preparation method comprises the following steps: (1) respectively weighing the materials in the formula, adding the weighed materials into a mixer, stirring at 50-60 DEG C for 3-4 minutes, transferring into a mixing mill, and mixing at 110-120 DEG C for 4-6 minutes; (2) putting the mixed material into a normal-temperature double-roller open mill, and rolling into sheets, or extruding into sheets by anextruder; and (3) cutting a certain amount of the material sheets as required, putting the cut material sheets into a mold, carrying out hot pressing in a press vulcanizer at 170-180 DEG C under a pressure of 8-10 MPa for 8-10 min, opening the mold, cutting edges, and carrying out frosting treatment.

The invention relates to the technical field of comprehensive utilization of lead resources, and discloses a preparation method of basic lead sulfate. The method comprises the following steps: addinga desulfurizing agent to lead sulfate to react for desulfurization, adding a regulator for hydration treatment to induce crystal nucleus formation, filtering a hydrated mixture, and conducting heatingand decomposition to obtain the basic lead sulfate. The method can be used for preparing different types of basic lead sulfate by controlling the addition amount of the desulfurizing agent and the desulfurizing ratio.

The invention discloses a lead removal method for a nickel chloride solution, relates to the technical field of lead removal, and aims to solve the problems of long flow, low efficiency, high cost and insufficient lead removal depth in the process of removing lead in the nickel chloride solution in the prior art. The nickel chloride solution is subjected to oxidation-reduction potential increasing and neutralized with nickel carbonate, the pH value of the neutralized solution is stabilized, and after the reaction is finished, a lead-removed solution and lead-containing slag are obtained after liquid-solid separation; and a lead slag removing and washing step: washing the lead-containing slag with sulfuric acid-containing water, filtering after washing, enabling the washing liquid to enter a nickel production system, and converting the washing slag into lead sulfate. According to the method, the technological process is shorter, the cost is lower, the lead removal efficiency is higher, the lead content of the solution obtained after lead removal is smaller than 0.00005 g/L, the Ni9999 high-quality electric nickel production requirement is met, and the produced lead slag is lead sulfate to be sold as a commodity.

The invention relates to a recycling method of anode mud produced by electrolytic manganese metal. The method comprises the following steps that A, the anode mud is ground into 80-100 mesh powder, andis subjected to slurrying, then sulfur dioxide is introduced, stirring, and heating are conducted during a sulfur dioxide introduction process, or ammonium sulfite is added after slurrying, then concentrated sulfuric acid is added, the pH is adjusted to 2.5-3, impurity removing and pressure filtration are conducted, and generated filter residue lead sulfate is recovered to obtain a solution containing manganese sulfate and manganese dioxide; B, the solution obtained in the step A is cooled to 38-42 DEG C, ammonia water is added, solid-liquid separation is conducted after pressure filtration to obtain a manganese hydroxide pressure filtration block and an ammonium sulfate solution; and C, the manganese hydroxide pressure filtration block is subjected to leaching by using an anode liquid subjected to anode mud filtration, impurity removal and standing, a filtrate after pressure filtration is subjected to electrolysis, then later-procedure treatment is conducted to obtain electrolytic metal manganese, and the anode mud is used in a slurrying procedure of the step A. According to the method, recycling of resources is achieved, and meanwhile, benefits are improved, the method is safe,environment-friendly and pollution-free, the obtained metal manganese is high in purity, and the use quantities of auxiliary materials such as sulfuric acid, ammonium sulfate, ammonia water, seleniumdioxide are greatly reduced.