54 results about "Lead zinc" patented technology

The application discloses a method for comprehensively recovering valuable metals in gold smelting slag, and belongs to the technical field of metallurgical solid waste resource utilization, and comprises the following steps: S1, ingredient mixing: uniformly mixing gold smelting slag, a chlorinating agent and a reducing agent according to a mass ratio, preparing into a pellet, and obtaining a mixture; S2, one-step chlorination and reduction roasting: after the mixture obtained in the step S1 is dried, the mixture is sent into a roasting furnace to be roasted, and chlorination volatilization of the valuable metals and reduction magnetization of iron oxides are simultaneously completed in the same roasting system; through accurate proportioning of the chlorinating agent and the reducing agent and synergistic regulation of the roasting temperature and the weak reducing atmosphere, the chlorination volatilization of gold, silver, copper, lead and zinc and the reduction magnetization of iron oxides are simultaneously completed in a single reactor and in the same roasting process, the problems of mutual contradiction between chlorination and reduction atmosphere and mutual restriction of recovery rates of two-step roasting processes are solved, the total roasting time is effectively shortened, and the comprehensive energy consumption is effectively reduced.

The utility model discloses a kind of lead-zinc smelting slag's crushing device including feed hopper, device body, feed hopper is set in the top of device body, device body is connected with control cabinet electricity telecommunication;The device body further include ash removal device, roller crusher, screening device, cone crusher, processing mechanism, ash removal device is respectively set in the top of roller crusher and cone crusher, screening device is set in the lower of roller crusher, cone crusher is set in the right side of screening device, processing mechanism is set in the lower of screening device and cone crusher.The function of the utility model is to prevent harmful substances in smoke dust in crushing process from spreading to the environment, causing pollution to the surrounding environment;Dust in slag before crushing is screened out, reducing the accumulation of ash slag in crushing treatment step, ash slag is carried down by spraying water, to prevent the effect of accumulated ash slag on crushing material;Prevent qualified material from being excessively crushed, ensure that the effect of crushing is uniform.

This invention discloses a flue gas desulfurization and denitrification treatment device and method for lead-zinc smelting. It relates to a flue gas treatment device, including a desulfurization component and a denitrification component. The desulfurization component includes a treatment chamber, with an inlet pipe fixedly connected to its side wall and a first and second partition fixedly connected to its inner wall. The inlet pipe communicates with the space between the first and second partitions. The first partition is located above the second partition, and a bubbling desulfurization pipe is fixedly connected below the second partition, located at the bottom of the treatment chamber. After entering the treatment chamber, the flue gas undergoes preliminary desulfurization treatment through spraying from the spray pipe. Then, the flue gas enters the space below the second partition for secondary treatment via bubbling. Finally, the treated flue gas enters the space above the first partition for further purification, significantly improving the treatment effect. Furthermore, the device adjusts the spraying method accordingly, greatly enhancing the adequacy of the spray desulfurization process and resulting in excellent performance.

The application discloses a kind of high oxidation rate lead-zinc oxide ore aerated sulphidation flotation and tailings discharge process, belong to mineral processing technical field.The method includes the following steps: grinding to lead-zinc oxide ore raw ore, obtain slurry;Sodium sulfide is added to slurry, and under the condition of aerated stirring, sulphidation reaction is carried out, and sulphidation slurry is obtained;Collector and foaming agent are added to sulphidation slurry, and flotation is carried out, and lead concentrate and zinc concentrate are obtained.The application introduces forced aerated stirring in the sulphidation process, strengthens the mass transfer process among gas-liquid-solid three phases, promotes the generation of dense, stable lead sulfide film on the surface of lead oxide minerals, solves the problem of low sulphidation efficiency of traditional sulphidation process.The application is used to treat refractory lead-zinc oxide ore containing Pb 5.59%, Zn 44.02%, oxidation rate more than 90%, and closed-circuit test can obtain qualified lead concentrate with lead grade of 60.72% and lead recovery rate of 79.53%, while lead flotation tailings directly become zinc concentrate with zinc grade of 46.33% and zinc recovery rate of 98.41%, realizing efficient separation of lead and zinc and tailings discharge.

The application discloses a low-carbon high-performance cement clinker and a preparation method thereof, and relates to the technical field of building materials, in particular to a low-carbon cement clinker and a preparation method thereof. The raw materials in the cement clinker include the following components in percentage by weight: 75-90% of raw material, 5-20% of steel slag and 2-8% of a conditioning material, wherein the conditioning material includes at least two of lead-zinc slag, copper slag, manganese slag and lithium slag. The lead-zinc slag in the conditioning material contains 0-5.5% of ZnO in percentage by weight; the copper slag contains 0-2.0% of CuO in percentage by weight; the manganese slag contains 0-7.0% of MnO2 in percentage by weight; and the lithium slag contains 0-3.0% of Li2O in percentage by weight. The application adds the conditioning material, ensures the content of zinc, copper, manganese or lithium in the cement clinker, realizes the purposes of stabilizing R-type tricalcium silicate and improving the strength of the cement clinker, does not add components such as fluorine and sulfur which pollute the environment, is environmentally-friendly, safe and reliable, and has a wide source of raw materials and strong applicability.

This invention relates to a collector agent in the flotation of lead, zinc and optionally copper comprising S-alkyl-4,5-dihydro thiazole (Formula la) or N-alkyl-2- thiazolidinethione (Formula lb) or a mixture thereof wherein R1 is a C1 to C18 alkyl, C2 to C18 alkenyl, C3 to Cw cycloalkyl, C6 to C18 aryl or an alkyl ether group of the formula -(CH2)nOCH3, where n is a number from 1 to 18, such group optionally being substituted.

This invention discloses a method and system for testing and evaluating the rheological properties of lead-zinc tailings modified asphalt materials, relating to the field of tailings recycling technology. The method includes: preparing lead-zinc tailings modified asphalt materials according to different mass ratios and conducting short-term aging simulations; performing rheological tests on a comparative sample set at multiple discrete temperature points; obtaining a comprehensive rheological property dataset and determining the high-temperature performance score, low-temperature performance score, and comprehensive synergistic balance coefficient for each mass ratio; conducting a temperature sensitivity comparative analysis on all mass ratios; identifying the recommended lead-zinc tailings mass ratio that achieves the target synergistic performance state; generating a comprehensive evaluation report containing the recommended mass ratio, high-temperature and low-temperature performance scores for each mass ratio, and the temperature sensitivity comparative analysis results. This invention identifies the modified formulation that achieves the optimal synergistic performance at both high and low temperatures and outputs the temperature sensitivity analysis results, providing a data-driven decision-making basis for modified asphalt formulation design and performance optimization.

The application discloses a method for repairing heavy metal contaminated soil by combining plants and microorganisms, and comprises the following steps: planting alfalfa seeds in heavy metal contaminated soil; inoculating lead and zinc copper resistant bacteria L1 into the heavy metal contaminated soil after 30 days when the seeds germinate; and harvesting the alfalfa after the growth period of the alfalfa ends. The application has a very obvious effect on adsorbing lead, zinc and copper heavy metals in the soil. The plant raw material is low in cost, the preparation process is simple and easy to operate, and the bacterial liquid is easy to culture. The application has small investment for removing heavy metals and no secondary pollution.

This invention provides a method and system for in-situ detection of lead-zinc tailings aggregates based on LIBS technology, relating to the field of mineral element detection. The method includes: optimizing and correcting the number of benchmark sampling points based on the detection complexity index of Q samples to obtain Q suitable sampling points; based on the sample sequence to be tested and the Q suitable sampling points, using LIBS technology to sequentially perform in-situ detection on the Q samples, outputting Q in-situ detection results. During the in-situ detection process, the number of suitable sampling points for subsequent samples is further optimized based on the consistency of historical detection results. This invention aims to solve the technical problem that existing detection methods typically use fixed rules, resulting in a difficulty in balancing detection efficiency and accuracy, and failing to meet the requirements of batch, on-site, and rapid detection in highway engineering. It can significantly improve the efficiency of in-situ detection of lead-zinc tailings aggregates while ensuring detection accuracy.

This invention discloses a method for the comprehensive utilization of sulfide tailings, relating to the field of sulfide tailings treatment technology. This method uses lead-zinc tailings as raw material and innovatively employs a combined "two-stage acid leaching-gravity separation-flotation" process. First, two stages of acid leaching selectively leach calcite associated with barite in the tailings, reducing the influence of muddy calcite while activating pyrite. Subsequently, the acid leaching residue undergoes gravity separation to further separate undissolved calcite, quartz, and other silica-containing gangue minerals. The gravity concentrate is then subjected to flotation to achieve the separation of barite and pyrite, ultimately obtaining high-purity barite and pyrite products respectively. This invention features a reasonable process route and simple operation, effectively solving the separation problem of fine-grained, high-viscosity lead-zinc tailings, achieving full-component purification and utilization of lead-zinc tailings, significantly enhancing the economic value of tailings resources, and reducing the environmental pressure caused by tailings stockpiling, thus demonstrating good economic, environmental, and social benefits.

The application belongs to the field of building materials, and particularly relates to a preparation method of an in-situ polymerization modified cement with lead-zinc tailings and anti-microbial corrosion. The preparation method of the modified cement comprises the following steps: dissolving initiators and cross-linking agents in water, and then placing the mixture in a constant temperature environment to obtain a mixed solution; dissolving water-reducing agents, polymer monomers and sodium carbonate in water, and then placing the mixture in a constant temperature environment to obtain a mixed solution; uniformly mixing Portland cement and lead-zinc tailings, and then placing the mixture to obtain a mixed powder; mixing the mixed powder and the mixed solution in a stirrer at a low speed, adding the mixed solution, stirring to obtain a mixed slurry, and then shaping and curing to obtain the in-situ polymerization modified cement with lead-zinc tailings and anti-microbial corrosion. Compared with the prior art, the application uses heavy metal solid waste which is difficult to be reused to replace traditional bactericides, reduces the cost of the anti-microbial corrosion cement, shortens the test period through empirical formula calculation, forms a double anti-microbial corrosion path of early polymer protection and late heavy metal ion inhibition, and improves the anti-microbial corrosion effect.

The application discloses a kind of acid lead-zinc contaminated soil remediation methods, belong to environmental geotechnical engineering technical field.The application includes that acid lead-zinc contaminated soil is mixed with solid component of solidifying agent uniformly, then mixture is sprayed with phosphoric acid solution, obtains solidified soil, completes acid lead-zinc contaminated soil remediation;The solid component of solidifying agent includes by mass fraction: fly ash: 90~100%, diatomite: 0~10%.The application can effectively construct physical adsorption-chemical fixation-structure locking triple solidification mechanism in the process of repair, to effectively strengthen the solidification and stabilization effect of heavy metal pollutants of acid lead-zinc composite contaminated soil, after repair, soil strength can be increased by about 6.59 times, lead, zinc fixation rate is more than 99.7% and 73.9% respectively, compared with traditional cement-based solidifying agent, carbon emission is reduced by about 40%, so that the soil body after repair can maintain stable morphology and heavy metal solidification effect under extreme conditions, realize contaminated soil resource utilization by waste disposal, with the characteristics of efficient and stable, environment-friendly, cost-saving.

The present application relates to the online detection technology field of the ore dressing industry, and discloses a lead-zinc grade prediction method based on LIBS spectrum. It comprises the following steps: constructing a first smoothing unit and a second smoothing unit, constructing a fusion unit based on dynamic weight distribution of physical constraints, constructing a pretreatment module based on the first smoothing unit, the second smoothing unit and the fusion unit; constructing a traditional branch, constructing a deep branch based on multi-scale convolution, constructing a multi-head fusion module by taking the traditional branch as a query branch and taking the deep branch as a key branch and a value branch, constructing a weak peak weighting module based on the weak peak region in the industrial calibrated lead-zinc spectrum, and constructing a prediction model based on the traditional branch, the deep branch, the multi-head fusion module, the weak peak weighting module and a multilayer perception mechanism; inputting the lead-zinc spectrum after being processed by the pretreatment module into the prediction model to obtain the lead-zinc grade prediction result corresponding to the lead-zinc spectrum. The problem that the detection accuracy and real-time performance of the existing lead-zinc grade prediction model cannot be considered simultaneously is solved.

The application discloses a method for bioleaching copper and zinc in lead-zinc smelting slag, which comprises adding the lead-zinc smelting slag into an acid culture medium inoculated with acidophilic leaching bacteria domesticated under metal salt stress for a certain period of time. Compared with the prior art, the acidophilic leaching bacteria domesticated under high-concentration metal salt stress can realize efficient leaching of copper and zinc in low-grade lead-zinc smelting slag, realizes waste-to-resource, and converts the original environmental burden into valuable resources, which conforms to the concept of sustainable development and circular economy, and has the advantages of environmental friendliness and low operation cost.

This invention discloses a method for preparing and applying a lead-zinc tailings-based geopolymer-based eco-friendly soil, belonging to the field of building materials technology. The main components of the eco-friendly soil material of this invention include: 90-95 parts by weight of lead-zinc tailings, 5-20 parts by weight of an activity regulator, 8-15 parts by weight of a composite alkali activator, and 3-8 parts by weight of a water-retaining and air-permeable modifier. The solid-liquid ratio of the solid components to water is 35%-55%. The activity regulator is one of metakaolin, slag, or steel slag; the water-retaining and air-permeable modifier is one of diatomaceous earth, zeolite powder, or straw fiber; and the water glass modulus in the composite alkali activator is 1.2-1.6. Compared with traditional cement-stabilized soil, the eco-friendly soil prepared based on the above components has advantages such as low carbon and environmental protection, low cost, multifunctionality, replicability, and scalability.

The present application belongs to the field of metallurgical waste residue treatment, and discloses a method for co-processing of fuming lead residue and waste automobile exhaust catalyst, comprising the following steps: crushing the waste automobile exhaust catalyst to obtain catalyst powder; uniformly mixing the catalyst powder with a slagging agent to obtain a mixed slag system; vortex stirring the mixed slag system and molten fuming lead residue, introducing a mixed gas of hydrogen and magnesium vapor into the vortex stirring system to obtain a reduced desulfurized molten liquid and a lead-zinc-containing flue gas; water quenching the reduced desulfurized molten liquid to obtain a base glass and a platinum group metal-containing alloy; and recovering the lead-zinc-containing flue gas. The present application makes full use of the physical latent heat of the molten fuming lead residue generated in the lead smelting process, reduces the capture temperature, saves reaction energy consumption, and solves the problems of high energy consumption, low recovery efficiency and tail residue that cannot be treated when the fuming lead residue and the waste automobile exhaust catalyst are treated separately.

This utility model relates to the field of dust detection technology and discloses a mobile detection device for safe production in lead-zinc ore beneficiation plants. It addresses the shortcomings of existing technologies in dust detection in crushing and grinding workshops of lead-zinc ore beneficiation plants, which have limited coverage and are not suitable for real-time mobile detection. This utility model uses an electromagnetic guide rail and slider to achieve horizontal movement of the dust detector, coupled with a linear power supply track to ensure continuous power supply, thus solving the problem of limited coverage of fixed equipment. The angle adjustment mechanism uses spherical contact and mechanical transmission to achieve multi-angle swinging of the collection tube, expanding the sampling range and improving accuracy at fixed locations when dust levels exceed standards. A filter screen intercepts large dust particles, protecting internal components. The entire device is adapted to the high-vibration, high-dust environment of crushing and grinding workshops in lead-zinc ore beneficiation plants, achieving wide-range, high-precision, continuous, and stable dust detection, providing a guarantee for safe production.

This application relates to a grouting material based on tailings sand and its preparation method, belonging to the field of grouting material technology. The grouting material based on tailings sand comprises component A and component B. This application utilizes lead-zinc tailings sand placed in an alkaline environment to enhance the gelation activity of its main component, feldspar. Through proper proportioning, it rapidly solidifies and maintains high strength under the combined action of water glass, sodium carbonate, and calcium hydroxide. Furthermore, the grouting material uses commonly used raw materials, ensuring ample market supply and convenient procurement. It also enables the resource utilization of tailings sand, resulting in significant economic and social benefits.

The utility model discloses a low heat value coal gas waste heat utilization system belongs to lead and zinc fire metallurgy technical field. Including low heat value coal gas delivery main pipe, be connected with the discharge branch pipe on low heat value coal gas delivery main pipe, and the export end of low heat value coal gas delivery main pipe inserts into the waste heat boiler, and the output end pipe section of discharge branch pipe is equipped with the blanking blind plate, and the water seal and bypass of parallel installation are additionally installed on the side of blanking blind plate of discharge branch pipe, electric regulating valve is installed on bypass. The utility model satisfies the low heat value coal gas flow required when waste heat boiler normal load works, and guarantees that the CO partial pressure of closed blast furnace hearth satisfies the reduction condition required when smelting.

A lead-zinc tailings-based ceramsite includes the following raw materials in parts by mass: 100 parts of lead-zinc tailings; 20-30 parts of limestone tailings; 6-8 parts of activated mullite nanopowder, 1-3 parts of glass powder, and 8-12 parts of dried sludge powder. A preparation method for the lead-zinc tailings-based ceramsite is further provided.

This invention discloses a method for preparing and applying a carbon-supported platinum group metal-based high-entropy alloy, relating to the field of high-entropy alloy synthesis technology. The method includes the following steps: S1: Taking several transition metal precursor salts and one platinum group metal salt in a certain proportion, and dissolving the transition metal precursor salt and the platinum group metal salt in a mixed solvent to obtain a dispersion; S2: Transferring the dispersion into a reaction vessel for reaction, and then washing it by ultrasonic centrifugation after the reaction; S3: Drying the washed raw material in a vacuum oven to obtain a carbon-supported platinum group metal-based high-entropy alloy. This invention uses transition metals such as copper, iron, nickel, lead, zinc, vanadium, cobalt, molybdenum, and bismuth, which promote reduction reactions, to impregnate palladium metal, and uses a solvothermal synthesis method to prepare the platinum group metal-based high-entropy alloy. This preparation process allows the amorphous carbon generated simultaneously during the reduction of the metal precursor to act as a carrier, controlling both the flower-like alloy morphology and the dispersibility of the alloy particles in solution.

The application discloses a lead-zinc tailing-based geopolymer thermal insulation material and a preparation method thereof, and relates to the technical field of engineering materials, which comprises the following components in parts by weight: 50 parts of lead-zinc tailing, 50 parts of fly ash, 4-16 parts of phenolic resin, 0-1 part of glass fiber, 0.8-1 part of hydrogen peroxide solid powder, and 60-128 parts of alkali activator. The application obtains a thermal insulation material with low thermal conductivity, high dimensional stability and environmental durability. The application combines lead-zinc tailing and fly ash as main raw materials, an optimized modulus alkali activator, precisely controlled liquid-solid ratio and silicon-aluminum ratio, and staged gradient stirring and stepwise solidification-curing-hydrothermal process, so that the whole scheme realizes the synergistic effect of solid waste resource utilization, accurate control of pore structure and material function integration, and is especially suitable for building energy saving, industrial thermal insulation and other scenes with high requirements for lightweight, fireproof and environmentally-friendly thermal insulation materials.

This utility model discloses an electric furnace device for the efficient reduction and separation of lead and zinc polymetals in molten slag. It includes a flat-bottomed horizontal cylindrical furnace body, constructed of a steel shell lined with refractory bricks, and externally fitted with a rolling ring and a toothed ring. The furnace body is equipped with a slag inlet, slag outlet, exhaust port, feeding port, electrode holes, a lead outlet, and several spray gun nozzles. Electrodes are installed in the electrode holes using a lifting mechanism. The lead outlet is located near the slag inlet. Spray guns are installed at the spray gun nozzles, with their heads inclined and inserted into the molten slag surface. This utility model utilizes a flat-bottomed horizontal cylindrical furnace body to improve the stability of the refractory bricks and facilitate slag movement and mass transfer. The spray guns, inclined and inserted into the molten slag, inject gas to agitate the molten slag, ensuring more thorough contact between the molten slag and the reducing agent, thus accelerating the reduction rate.

Discloses a combined depressant for sphalerite flotation separation and its application, the combined depressant including reducing substance and anthocyanin. It is used as a combined depressant for sphalerite in the flotation separation of chalcopyrite and sphalerite or galena and sphalerite. After crushing and grinding the raw ore, the combined collector and foaming agent are added to the ore pulp for copper-zinc or lead-zinc flotation. During the copper-zinc or lead-zinc separation process, the combined depressant is added as the sphalerite depressant, isopentyl xanthate is used as the collector of chalcopyrite or galena, pine oil is used as the foaming agent, the froth product is copper concentrate or lead concentrate, and the bottom product is zinc concentrate. The combined depressant of the disclosure has a strong inhibitory effect on sphalerite and can effectively achieve flotation separation of chalcopyrite and sphalerite or galena and sphalerite.

This invention discloses a method and system for optimizing the proportion of tailings cementitious materials based on response surface methodology, relating to the field of tailings recycling technology. The method includes: using lead-zinc tailings content, fly ash content, sand-cement ratio, and water-cement ratio as process parameters, determining multiple cementitious material formulations based on response surface methodology; preparing physical cementitious material test blocks according to these formulations; conducting compressive strength tests to obtain the compressive strength results; establishing a compressive strength prediction model based on the results using regression analysis; and determining a target combination of process parameters based on the compressive strength prediction model, with a target compressive strength or target cost-effectiveness ratio as the objective. The target combination of process parameters is the proportion of lead-zinc tailings content, fly ash content, sand-cement ratio, and water-cement ratio. The cementitious material is then produced using this target combination of process parameters. This invention systematically optimizes the proportion of tailings cementitious materials through response surface methodology, establishing a compressive strength prediction model to achieve controllable performance prediction, providing a scientific solution for tailings resource utilization.

This invention discloses a method for co-smelting pyrolysis residue and copper sulfide ore, comprising: pyrolyzing halogen-containing waste circuit boards to obtain pyrolysis residue; mixing the pyrolysis residue with copper sulfide ore and flux, and feeding it into an oxygen-enriched side-blown smelting furnace for smelting, forming a copper matte phase, a slag phase, and a flue gas phase under side-blown oxygen-enriched conditions; by controlling the smelting temperature, oxygen supply intensity, and slag composition, gold and silver are enriched in the copper matte phase, and elements such as lead, zinc, antimony, arsenic, and bismuth are directionally distributed among the copper matte phase, slag phase, and flue gas phase; the copper matte phase, slag phase, and flue gas phase are discharged separately, and the copper matte phase is subsequently recycled. This invention combines pyrolysis dehalogenation of waste circuit boards with copper smelting, which can reduce the environmental risks of direct pyrometallurgical treatment of halogen-containing organic matter, improve the enrichment efficiency of rare and precious metals, and improve the adaptability of complex secondary resources in an oxygen-enriched side-blown smelting furnace.

This invention relates to a sodium polysulfide-based cyanide-free zinc-inhibiting composite inhibitor for lead-zinc separation, comprising, by weight: 1-2 parts sodium polysulfide, 3-5 parts zinc sulfate, 1-4 parts sodium metabisulfite, and 0.1-1.5 parts organic selectivity modifier; the sodium polysulfide is Na₂S. x The formula is: x = integers from 2 to 4; the organic selective regulator is one of L-cysteine, tannin, and modified corn starch; sodium polysulfide is the core zinc-inhibiting component; zinc sulfate and sodium polysulfide work synergistically to enhance the inhibition effect on sphalerite; and the organic selective regulator further strengthens the selectivity of "inhibiting zinc but not lead," reducing lead mineral loss. This invention's composite inhibition does not require operation under strongly alkaline conditions; only neutral slurry is needed to achieve efficient inhibition, significantly reducing the amount of lime used and avoiding the problem of excessively high alkalinity in the return water. This reduces the neutralization cost of return water treatment and fundamentally solves the problem of scaling and clogging in return water and slurry pipelines.