10 results about "Extracted Lead" patented technology

The present application belongs to a kind of medical radioisotope preparation field, specifically related to a kind of method for extracting lead-212 and bismuth-212 in thorium-232 decay chain, solution containing thorium-232 decay chain material is passed through anion exchange resin column, the solution containing thorium-232 decay chain material includes halogen ion, and the concentration of hydrogen ion in the solution containing thorium-232 decay chain material is greater than 0.01mol / L, lead-212 and bismuth-212 are absorbed by anion exchange resin column, and other nuclides directly pass through anion exchange resin column and are not absorbed, lead-212 and bismuth-212 are desorbed from anion exchange resin column by elution reagent, and lead-212 and bismuth-212 are separated and extracted;The present application can extract lead-212 and bismuth-212 simultaneously, and the extraction speed is fast, the purity is high, and the product is not easy to cause organic pollution.

The application discloses a method for recovering high-quality lead from waste lead storage battery lead paste by wet electrolysis, and belongs to the technical field of lead paste recovery. The method is used for solving the technical problems that the existing technology has a complex process, high energy consumption and the purity of recovered lead needs to be further improved in the process of recovering lead from lead paste. The method comprises the following steps: lead paste and sulfuric acid are added into a beaker, and then are immersed at room temperature for 18-20 hours; then the beaker is transferred to an iron stand with mechanical stirring; sulfurous acid is added into the beaker, and then is reacted at room temperature for 4-6 hours; and pretreated lead paste is obtained through post-treatment; and the pretreated lead paste and an ammonium acetate aqueous solution are added into a nitrogen-protected three-neck flask and are stirred. The method not only effectively simplifies the process flow of extracting lead from lead paste, reduces industrial energy consumption, but also reduces the impurity content in recovered lead while improving the lead recovery rate, and improves the quality of recovered lead.

The invention provides a myocardial infarction auxiliary analysis method and system based on lead collaboration and hypergraph learning, and belongs to the technical field of artificial intelligence and medical signal processing. Extracting lead features of the preprocessed 12-lead electrocardiosignals one by one to obtain a lead feature matrix; performing lead grouping on twelve leads according to medical priori to obtain a plurality of lead combinations; constructing a hypergraph neural network model according to the plurality of lead combinations and the lead feature matrix; and training the hypergraph neural network model, and carrying out myocardial infarction auxiliary classification through the trained hypergraph neural network model. According to the method, the hypergraph neural network model is constructed through lead-by-lead feature extraction and medical priori lead grouping, so that deep modeling is performed on the electrocardiosignals, and the classification performance is improved while the sufficiency of feature expression is ensured.

The invention discloses a method for extracting lead from waste lead plaster by taking sulfide minerals as a reducing agent, and belongs to the field of hydrometallurgy. The method comprises the following steps: mixing, heating and stirring the waste lead plaster, sulfide minerals, ferric salt and a sulfuric acid solution, reducing and converting a lead-containing phase in the waste lead plaster into insoluble lead sulfate to obtain reducing slag, generating ferrous ions from the sulfide minerals under the action of a ferric salt catalyst, and reducing and converting lead dioxide in the waste lead plaster into lead sulfate; the reducing slag and an acetate solution are mixed, heated and stirred, lead sulfate is desulfurized and leached into soluble lead acetate, and a lead-containing leaching solution is obtained. Aiming at the waste lead plaster in the waste lead-acid storage battery, the low-cost sulfide mineral is used as a reducing agent, so that the process cost is reduced. By means of the two-step process of reduction conversion and desulfurization leaching, the additional impurity separation procedure is avoided, the extraction efficiency of lead in the waste lead plaster is 99% or above, the pure lead-containing leaching solution is obtained, and a new thought is provided for efficient recycling of the waste lead plaster.

The disclosure belongs to the field of preparation of radioisotopes for medical uses and relates to a method for extracting lead-212 and bismuth-212 from a thorium-232 decay chain, including: passing a solution containing thorium-232 decay chain substance through an anion exchange resin column, the solution containing thorium-232 decay chain substance containing halogen ions, and a concentration of hydrogen ions in the solution containing thorium-232 decay chain substance being more than 0.01 mol / L, lead-212 and bismuth-212 being adsorbed by the anion exchange resin column and other nuclides passing through the anion exchange resin column without being adsorbed; and introducing eluting agents to desorb lead-212 and bismuth-212 from the anion exchange resin column, so as to obtain lead-212 and bismuth-212 by separation and extraction. The disclosure can simultaneously extract lead-212 and bismuth-212 with a high extraction speed and high purity, and is not easy to cause organic pollution of products.

The invention discloses a method for separating and extracting lead and zinc from lead-zinc sulfide ore powder, and belongs to the technical field of nonferrous metal extraction. The method for separating and extracting lead and zinc from lead-zinc sulfide ore powder comprises the following steps: adding a surfactant and a dilute acid solution into the lead-zinc sulfide ore powder, uniformly mixing, and pouring into a closed reaction kettle; introducing oxygen, heating to a constant temperature, starting stirring, carrying out oxygen pressure leaching, and carrying out liquid-solid separation after a preset time is reached, so as to obtain lead sulfate-based leaching residues and zinc-iron-containing leaching liquid; adding an oxidizing agent into the zinc-iron-containing leaching solution, adding a neutralizing agent for neutralization and hydrolysis after reaction, and removing impurities to obtain a zinc solution; adding the lead sulfate-based leaching residues into an alkaline desulfurizing agent to carry out desulfurization reaction, and leaching in an acid leaching agent to obtain lead-containing leaching liquid; and the lead-containing leaching agent is subjected to electro-deposition, metal lead is obtained, waste electrolyte is returned to the acid leaching agent, and recycling of the leaching agent is achieved. By adopting the method for separating and extracting the lead and the zinc from the lead-zinc sulfide ore powder, efficient and deep separation and recovery of the zinc and the lead in the lead-zinc sulfide ore are realized.

The application discloses a combined device and method for flotation-metallurgy of lead and zinc in refractory complex ores, comprising a flotation system and an oxygen pressure acid leaching system; the flotation system comprises floaters connected in sequence; the oxygen pressure acid leaching system comprises a first-stage oxygen pressure acid leaching system and a second-stage oxygen pressure acid leaching system, a desulfurization reactor and a lead selection reactor; the desulfurization reactor comprises a rotatable open tank cover and a solid-liquid separator; the lead selection reactor comprises a temperature control system and a solid-liquid separation pipe. The steps of using the device are as follows: the raw ore is mixed and floated to separate lead and zinc in the flotation system, and the mixed lead-zinc concentrate is sent to the oxygen pressure acid leaching system to extract lead and zinc respectively. The application has the characteristics of good metal recovery effect, clear and smooth process flow, convenient operation and environmental friendliness.

The invention discloses a two-step method for extracting lead in copper anode slime silver separation residues, and belongs to the technical field of non-ferrous metal hydrometallurgy. The method comprises the following steps: 1, placing the copper anode slime silver separation slag in a sodium hydroxide solution, leaching through mechanical stirring, and carrying out centrifugal separation to obtain a lead-rich leaching solution and primarily-leached lead slag, and 2, carrying out secondary leaching on the primarily-leached lead slag by using a mixed solution of hydrogen peroxide and sodium hydroxide, and 3, reacting a sodium sulfide solution with the lead-rich leaching solution to obtain lead precipitation slag and an alkaline leaching solution, wherein the alkaline leaching solution after lead precipitation can be recycled. By means of the method, deep extraction of lead in the copper anode slime silver separation residues can be achieved, the alkaline leaching solution obtained after lead precipitation can be recycled, and the trial production cost and environmental pollution in the metallurgical solid waste treatment process are remarkably reduced.

The present invention relates to the field of preparation of medical radioisotopes, and specifically relates to a method for extracting lead-212 and bismuth-212 from a thorium-232 decay chain, comprising: enabling a solution containing a thorium-232 decay chain substance to pass through an anion exchange resin column, wherein the solution containing the thorium-232 decay chain substance contains halogen ions, and the concentration of protons in the solution containing the thorium-232 decay chain substance is greater than 0.01 mol / L, lead-212 and bismuth-212 are adsorbed by the anion exchange resin column, while other nuclides directly pass through the anion exchange resin column and are not adsorbed; introducing a leaching reagent to desorb lead-212 and bismuth-212 from the anion exchange resin column; and performing separation extraction to obtain lead-212 and bismuth-212. In the present invention, lead-212 and bismuth-212 can be extracted simultaneously, the extraction speed is fast, the purity is high, and organic pollution of a product is not easily caused.

This invention discloses a method for efficient extraction of lead and zinc from oxidized lead-zinc ore at room temperature and pressure, belonging to the field of non-ferrous metal hydrometallurgical technology. The invention includes (1) adding a mixed solution of ammonium chloride and citric acid as a leaching agent to the oxidized lead-zinc ore and conducting a stirring reaction at room temperature and pressure; (2) after the reaction is completed, performing solid-liquid separation to simultaneously leach lead and zinc. By using a mixed solution of citric acid and NH4Cl as a leaching agent, this invention can effectively achieve efficient leaching of valuable metals such as lead and zinc from oxidized lead-zinc ore under mild conditions, while simultaneously inhibiting the dissolution of impurities (such as iron and silicon). This avoids the high energy consumption of traditional high-temperature and high-pressure methods and the problem of silica gel formation that easily affects solid-liquid separation in traditional acid leaching. It achieves efficient extraction of oxidized lead-zinc ore resources under normal pressure and temperature conditions, providing a scientifically reliable new approach for the resource utilization of oxidized lead-zinc ore.