27results about "Zinc sulates" patented technology

The invention belongs to the field of wastewater treatment, and particularly relates to a selective separation method for zinc and cadmium in a low-concentration-difference difficult-to-separate zinc-cadmium-containing solution, which comprises the following steps: carrying out co-precipitation reaction on the low-concentration-difference difficult-to-separate zinc-cadmium-containing solution and an alkaline precipitator to obtain co-precipitation slag enriched with zinc and cadmium; the low-concentration-difference difficult-to-separate zinc-cadmium-containing solution is a solution in which the ratio of the concentration of high-concentration ions to the concentration of low-concentration ions in zinc and cadmium is 0.9-2; the concentration of cadmium is 8-40g / L; the coprecipitation slag is subjected to size mixing with water, selective cadmium dissolving is carried out under the condition that the pH of size obtained after size mixing is controlled to be 6-7.1, then solid-liquid separation is carried out, and zinc-rich slag and cadmium-rich leachate are obtained; the solid-to-liquid ratio in the slurry is 85-150g / L; carrying out deep zinc removal treatment on the cadmium-rich leachate to obtain a cadmium purification solution, and preparing the cadmium purification solution into a high-purity cadmium product with the grade of 3N or above; and the zinc-rich slag is subjected to acid leaching and deep cadmium removal treatment, a zinc purification solution is obtained, and then the zinc purification solution is prepared into a 2N-grade high-purity zinc product. According to the method disclosed by the invention, high-quality cadmium and zinc can be obtained at high yield.

The application discloses a method for deeply removing organic matters in zinc sulfate solution, and belongs to the technical field of zinc hydrometallurgy. An oxidizing agent is added into the zinc sulfate solution, and the adding amount is 13-18 g / L; the solution is stirred and oxidized at 80-85 DEG C for 5-5.5 h. A neutralizing agent is added into the oxidized solution to increase the pH value of the solution to 5-5.5, and a solid-containing suspension is obtained by stirring. A flocculating agent is added into the solid-containing suspension, and the adding amount is 1-1.5 g / L; after stirring for 50-70 min, solid-liquid separation is carried out, and supernatant is obtained. An adsorbent is added into the supernatant, and the adding amount is 2.5-3.5 g / L; after stirring at 75-85 DEG C for 100-150 min, solid-liquid separation is carried out, and the purified zinc sulfate solution after removal of organic matters is obtained. The method adopts the synergistic treatment of oxidation, neutralization and co-precipitation, flocculation and adsorption, and can reduce the content of organic matters in the solution to below 80 mg / L through step-by-step conversion and directional removal of the organic matters, and the removal rate of the organic matters reaches more than 51%, so that the deep removal of the organic matters is successfully realized.

This invention discloses a method for producing sulfate from waste acid wastewater, relating to the field of industrial wastewater reuse technology. The method includes the following steps: raw material pretreatment: collecting waste acid wastewater generated from the washing process of non-ferrous metal smelting flue gas, and concentrating it to obtain concentrated acid water; slurrying and leaching: mixing materials containing metal oxides with the concentrated acid water in a certain proportion, and carrying out slurrying and leaching reactions; purification: purifying the leached solution to obtain a purified solution; sulfate preparation: treating the purified solution to obtain a solid sulfate product. This method directly uses waste acid to replace expensive purchased sulfuric acid, significantly reducing the production cost of sulfate. It is particularly suitable when sulfuric acid market prices are high. Conventionally, producing one ton of zinc sulfate consumes 0.43 tons of sulfuric acid, and producing one ton of manganese sulfate consumes 1.23 tons of sulfuric acid. Using this method, sulfuric acid is directly replaced, resulting in significant cost savings.

The invention relates to a method for recovering germanium in germanium distillation raffinate and carrying out gradient purification and impurity removal, belongs to the technical field of germanium distillation raffinate resource recovery, and aims at the characteristics that impurity ions in the germanium distillation raffinate are high in concentration, and germanium and impurities are difficult to effectively separate due to similar properties. Short-process efficient and high-purity productization recovery of germanium in the germanium distillation residual liquid is realized by adopting a pretreatment-ion exchange-chlorination distillation technical route, and comprehensive recovery and resource utilization of lead, chlorine, zinc and the like in the germanium distillation residual liquid are realized by adopting an acidification lead precipitation-negative pressure distillation-neutralization impurity removal technical route. According to the method, the high-purity GeCl4 product is directly extracted and produced from the germanium-containing wastewater by adopting chemical modification and ion exchange methods, and compared with the existing process, the method has the technical advantages of high comprehensive utilization rate, short-range high efficiency, greenness, cleanness and the like.

The invention discloses an intermittent feeding device for zinc sulfate production, and belongs to the technical field of chemical equipment, the intermittent feeding device comprises an acid leaching tank module, a zinc powder quantification module and a zinc powder distribution module, the acid leaching tank module is provided with the zinc powder quantification module, and the zinc powder quantification module is used for quantitatively weighing a zinc raw material needing to react; the acid leaching tank module is arranged in the acid leaching tank body and is used for feeding a zinc raw material into an inner cavity of the acid leaching tank body to react with a sulfuric acid component, and the zinc powder distribution module is arranged in the inner cavity of the acid leaching tank body and is used for continuously adding a small amount of the zinc raw material into the sulfuric acid component to react. Quantitative zinc raw materials can be uniformly conveyed into sulfuric acid components for reaction, zinc sulfate crystal shells are prevented from being formed on the surface of powder during excessive feeding, further proceeding of the reaction is inhibited, and yield reduction caused by incomplete reaction is avoided.

This invention provides a method for the synergistic recovery of sulfuric acid and copper and zinc from waste acid from copper strip washing, comprising the following steps: S1, waste acid pretreatment; S2, novel bipolar membrane electrodialysis separation; S3, copper-targeted precipitation separation: adding a copper-targeted precipitant to the heavy metal concentrate to form a stable precipitate, followed by filtration and washing to obtain a copper-enriched precipitate; S4, zinc sulfate preparation: adjusting the pH of the filtrate after copper precipitation separation and removing reducing impurities, then evaporating and concentrating to a solution density of 1.4-1.5 g / cm³, cooling and crystallizing, and centrifuging to obtain zinc sulfate crystals, with the mother liquor returned to the evaporation and concentration unit for recycling. This method can achieve efficient recovery and recycling of sulfuric acid, while simultaneously achieving precise separation of copper and zinc ions and the preparation of high-value products, significantly improving the resource utilization efficiency of waste acid and reducing treatment costs.

The invention discloses a method for dechlorinating a zinc sulfate solution, the method for dechlorinating the zinc sulfate solution comprises a pretreatment step and a main reaction step, and the method specifically comprises the following steps: adjusting the pH value of the zinc sulfate solution to be treated to 1.5-3.5 to obtain a material a; adding a precipitator into the material a for stirring reaction to obtain a dechlorinated zinc sulfate solution; the precipitant is trialkyl bismuth, trialkyl antimony, trialkyl lead or trialkyl vanadium. According to the method, the chlorine removal efficiency and stability are improved by regulating and controlling reaction conditions such as the pH value, the temperature and the types of precipitants, and finally, an environment-friendly, economical and feasible treatment scheme is realized.

The invention discloses a ZnO / ZnS / ZnSO4 nano composite material and a gas sensor based on the ZnO / ZnS / ZnSO4 nano composite material, a ZnO / ZnS heterojunction composite material with rough spherical morphology is prepared by adopting a two-step method, part of ZnS in the ZnO / ZnS heterojunction composite material can be converted into ZnSO4 through subsequent controllable annealing treatment, so that a ZnO / ZnS / ZnSO4 three-layer composite material is obtained, and finally the ZnO / ZnS / ZnSO4 three-layer composite material is prepared into the gas sensor. And high-performance detection of NO2 gas is realized. The prepared sensor has the characteristics of high sensitivity, good selectivity and strong stability, has relatively high response (65) to 5 ppm NO2 at a relatively low working temperature (110 DEG C), can detect nitrogen dioxide gas with extremely low concentration, and has huge potential in the aspect of developing and detecting low-concentration nitrogen dioxide gas.

The utility model discloses a vacuum concentration device for preparing zinc sulfate heptahydrate, which comprises a reaction kettle, a heating jacket is arranged in the reaction kettle, two sides of the heating jacket are respectively connected with a steam input pipe and a steam output pipe, the inner wall of the reaction kettle is fixedly connected with a flow dividing pipe, the flow dividing pipe is of a lantern ring structure, and the bottom of the flow dividing pipe is connected with a spray head. Two groups of nozzles are arranged at the bottom of the shunt pipe, the two groups of nozzles are annularly distributed at equal intervals relative to the bottom of the shunt pipe, one side of the shunt pipe is connected with a first connecting pipe, the first connecting pipe is provided with a first electromagnetic valve and a water pump, and one side of the first connecting pipe is connected with a second connecting pipe; an air pump and a second electromagnetic valve are arranged on the second connecting pipe, and an online densimeter and a temperature sensor are arranged on one side of the reaction kettle. According to the device, the cleaning difficulty of the inner wall of the reaction kettle can be reduced, and meanwhile, the concentration of zinc sulfate heptahydrate can be monitored, so that the concentration quality of zinc sulfate heptahydrate is ensured.

This invention proposes a method for preparing zinc sulfate heptahydrate through spatially induced directional crystallization via a zinc-substrate rolled structure. The method involves rolling zinc sheets into zinc coils, utilizing the geometric constraints between the zinc coil layers in conjunction with the high-speed shearing of the reaction liquid to guide seed crystals to grow along a specific direction, yielding high-purity, uniformly morphologically uniform ZnSO4·7H2O crystals. This method achieves ultra-low impurity residue while exhibiting breakthrough structural stability, with a product purity reaching 99.99%. Environmental testing shows that the material retains over 98% of its initial performance during long-term use, successfully solving the stability problems caused by lattice distortion, impurity residue, and industrial scale-up in traditional processes, providing a reliable guarantee for high-end material applications.

The invention discloses a method for removing calcium and magnesium ions in a zinc sulfate solution and prolonging the working time of an evaporator. The method comprises the following steps: mixing and reacting a zinc sulfate solution, zinc fluoride and an alkaline zinc-containing substance, and filtering to obtain the zinc sulfate solution. According to the method provided by the invention, the content of calcium ions and magnesium ions in the zinc sulfate solution can be effectively reduced, other cation impurities are not introduced, the content of fluorine ions in the zinc sulfate solution can be controlled, and corrosion of the fluorine ions to a pipeline is avoided.

The invention relates to a method for removing elemental sulfur in zinc sulfate leachate, and relates to the technical field of lead and zinc smelting. The invention provides a method for removing elemental sulfur in zinc sulfate leachate, which comprises the following steps: adding copper sulfate into the zinc sulfate leachate to form a mixed solution, adding cadmium powder into the mixed solution to form a mixed slurry, reacting the mixed slurry, and carrying out liquid-solid separation after the reaction is finished to obtain a desulfurized zinc sulfate solution. According to the method, the coupling agent copper sulfate and the inducer cadmium powder are added into the zinc sulfate lixivium, the impurity elemental sulfur in the zinc sulfate lixivium is removed, and the purposes of purifying the zinc sulfate solution and eliminating the influence of the elemental sulfur are achieved. The removal method disclosed by the invention is simple and easy to operate, the removal rate of elemental sulfur reaches 97%, and the original production process flow is not influenced.

An electrochemical element comprising: - an aqueous electrolyte with a pH less than 7 containing Zn2+ and Mn2+ ions, - a negative electrode comprising zinc or a zinc-based alloy, - a positive electrode comprising manganese dioxide, a first carbon black with a specific surface area S1, and a second carbon black with a specific surface area S2, with S2 / S1 ≥ 2. Abbreviated figure: Figure 1

The present application relates to a method for treating a zinc-containing residue. The treatment method comprises: performing alkali washing on a zinc-containing residue to obtain ammonia gas and an alkali washing slurry; performing solid-liquid separation on the alkali washing slurry to obtain a filter cake and a filtrate; sequentially performing washing and acid leaching on the filter cake to obtain a zinc sulfate solution and an aluminum residue; sequentially performing washing and alkali leaching on the aluminum residue to obtain an alkali leaching solution and an alkali-leached residue; performing electrolysis on the alkali leaching solution to obtain zinc and an aluminum-containing alkali solution; and performing aluminum removal treatment on the aluminum-containing alkali solution to obtain a composite defluorinating agent composed of aluminum oxide and calcium oxide and a regenerated alkali solution. The treatment method provided by the present application can realize the separation and resource recycling of aluminum, zinc, chlorine, and ammonia from a zinc-containing residue and the regeneration and recycling of an alkali solution, and the treatment process does not involve secondary waste, has low treatment energy consumption, and has economy and industrial feasibility.

The application discloses a zinc sulfate evaporation device, which comprises an evaporator body and a shell, wherein a cavity is arranged between the shell and the evaporator body, an air inlet pipe is arranged at the upper end of the shell, an air pressure adjusting device is arranged in the cavity, the air pressure adjusting device comprises a moving block, a baffle, a spring, an upper slide rail and a lower slide rail, the moving block slides left and right between the upper slide rail and the lower slide rail, the baffle is used for dividing the cavity into a first cavity and a second cavity, a connecting pipe is arranged at the upper end of the shell, the first cavity and the second cavity are communicated with each other through the connecting pipe, and an air inlet is arranged on the upper and lower surfaces of the upper slide rail. The air pressure adjusting device can dynamically adjust the opening and closing of the air inlet according to the air pressure difference between the first cavity and the second cavity, so that the inflow amount of hot air is controlled, and the effective evaporation of the zinc sulfate liquid is ensured.

The invention relates to a method for recovering valuable metals in cobalt slag through ultrasonic strengthening, and belongs to the technical field of hydrometallurgy. According to the method, the cobalt slag produced in the zinc hydrometallurgy purification process is used as a raw material, two-step leaching is conducted on the cobalt slag under the ultrasonic wave condition, the first-step sulfuric acid concentration is 1.5-2.5 mol / L, and the second-step sulfuric acid concentration is 1, 5-2.0 mol / L. Compared with a traditional cobalt slag leaching method, the using amount of a reducing agent is reduced by 40%-50%, the reaction time is shortened to be within 50%, and the method is suitable for industrial production. According to the method, the high leaching rate of valuable metal in the cobalt slag is achieved under the normal pressure and the low temperature, and the slag amount is reduced by 24%-31%. By means of the method, segmented leaching of iron, zinc, cobalt and manganese is achieved, the obtained first-segment leaching solution does not contain manganese basically, and the technical problem that manganese and zinc need to be further separated from the leaching solution is solved; and iron in the cobalt slag is basically completely leached in the first step, so that the influence of iron on cobalt leaching is effectively avoided or reduced.

Provided herein is a method for producing furfural from lignocellulosic biomass or an extract thereof, such as a sugar-rich extract, using a solid zinc sulfate-rich catalyst to catalyze the conversion to furfural. Also provided herein are zinc sulfate-rich catalysts, and methods for producing zinc sulfate and zinc sulfate-rich catalysts from tire carbon black.

The application discloses a method for removing chlorine from a zinc sulfate solution containing chlorine by using ozone or ozone air, and ozone or ozone air generated by an ozone generator is introduced into a closed pressure-adjustable container containing the zinc sulfate solution containing chlorine, and oxidation dechlorination is carried out in the container at normal temperature or under the natural temperature condition of the solution; low-chlorine zinc sulfate solution and mixed waste gas containing oxygen and chlorine gas are obtained; the mixed waste gas is introduced into saturated limewater or a sodium alkali solution, and chemical products of sodium hypochlorite or calcium hypochlorite are obtained. The application adopts ozone or ozone air to remove chlorine from the zinc sulfate solution containing chlorine, and has the advantages of simple process, high dechlorination efficiency, comprehensive recovery of chemical products of calcium hypochlorite or sodium hypochlorite for reuse or sale, less waste, no sodium chloride accumulation, and good social and economic benefits.

The invention belongs to the technical field of metallurgy, and discloses a method for efficiently recovering multiple elements in smelting smoke dust. The method comprises the following steps that S1, smoke dust is leached through sulfuric acid and hydrogen peroxide, zinc, copper and arsenic enter a solution, and lead, gold and silver are left in slag; s2, activated arsenic sulfide is added into the pickle liquor, copper is selectively precipitated to obtain copper sulfide slag, and meanwhile arsenic is further enriched in the solution to obtain arsenic-rich liquor; and S3, the acid leaching residues, the copper sulfide residues and the arsenic-rich liquid are treated correspondingly, and lead, gold, silver, copper, arsenic trioxide and zinc sulfate are recycled. According to the method, efficient separation and full-quantification recovery of multiple metals are achieved, especially harmful arsenic is converted into valuable products, the technological process is clean and environmentally friendly, the resource utilization rate is high, and economic benefits and environmental benefits are remarkable.

An apparatus, method and system are provided to recover constituent components from single use batteries. In particular, the apparatus, method and system may be used to recover zinc and manganese in the form of sulfates from depleted commercial which in turn may be subsequently used for other applications, such as micronutrients and fertilizers.

The invention belongs to the technical field of waste acid resource utilization, and particularly relates to a membrane dechlorination process of chlorine-containing dilute sulphuric acid. The process comprises an acid-resistant NF unit and an acid-resistant RO unit, according to the process, zinc sulfate is recovered through an acid-resistant NF unit, and sulfuric acid and hydrochloric acid are separated through an acid-resistant RO unit. According to the invention, the chlorine-containing dilute sulphuric acid waste liquid of zinc hydrometallurgy is subjected to dechlorination treatment through a'multi-section acid-resistant NF + multi-section acid-resistant RO 'process, so that the waste acid is converted into sulfuric acid, zinc sulfate and hydrochloric acid with high added values at lower cost, and the sulfuric acid, the zinc sulfate and the hydrochloric acid are further reused in a zinc smelting production process; not only is the production cost of an enterprise reduced, but also resource utilization of the chlorine-containing dilute sulfuric acid waste liquid is realized.

The utility model relates to the technical field of cooling crystallization devices, and discloses a zinc sulfate heptahydrate cooling crystallization device which comprises a tank body, the tank body is obliquely arranged, an opening is formed in one side of the tank body, and a rack is fixedly mounted at the bottom of the tank body; an adjusting valve is arranged at one end, far away from the opening, of the tank body, and a temperature sensor is arranged at the opening end of the tank body; a rotating pipe is arranged in the tank body, the periphery of the rotating pipe is fixedly sleeved with a belt type spiral blade, the interior of the belt type spiral blade is hollow, and the belt type spiral blade is connected with a driving piece through a cooling water inlet and outlet mechanism. According to the utility model, the zinc sulfate solution is reversely cooled by cooling water, and the temperature of the cooling water at the liquid discharge pipe is close to the temperature of the added zinc sulfate solution, so that the cooling efficiency is improved, large-particle crystals move backwards faster than small-particle crystals, and the large-particle crystals are discharged firstly, so that the small-particle crystals have enough time to grow, and the low-temperature zinc sulfate solution is discharged in time; the efficiency of the device is improved, and the product quality is improved.

The application discloses a method for recovering tin, germanium, copper, zinc and nickel from complex tin-containing raw materials. The method adopts high-temperature sulfuric acid roasting at 400-500 DEG C as a core pretreatment step, and selectively converts germanium, copper, zinc, nickel and arsenic in the raw material into soluble sulfate, while tin is inhibited from dissolving out and is enriched together with antimony, bismuth and lead in a slag phase, thereby realizing efficient source separation of tin from other valuable metals. Tin-containing slag is subjected to fire method (electric furnace and vacuum furnace) smelting to directly recover crude tin and alloy; and the leaching solution is subjected to iron powder replacement to remove copper and arsenic, tannic acid is used to precipitate germanium, hydrolysis is used to precipitate tin, sulfuration is used to precipitate nickel, and evaporation crystallization is used to produce zinc sulfate. The method innovatively combines the advantages of the fire method and the wet method, is particularly suitable for processing complex tin-containing raw materials, has good metal separation selectivity, high comprehensive recovery rate, compact process flow, near-zero discharge of waste water and waste liquid, and has remarkable economic benefits and environmental benefits.

The present disclosure relates to the technical field of batching tanks, and one embodiment of the present disclosure provides a batching tank for zinc sulfate preparation, which comprises a tank body, a stirring motor and a stirring frame, the stirring motor is installed on the top of the tank body, the stirring frame is arranged at the output end of the stirring motor, a flushing assembly is arranged on the top of the tank body, a heating assembly is arranged on the inner wall of the tank body, an outer frame is arranged outside the tank body, a feeding assembly is arranged on the tank body and the outer frame, the feeding assembly comprises a sealing sleeve, the sealing sleeve is arranged in the outer wall of the tank body, a feeding pipeline is movably sleeved in the sealing sleeve, a conveying auger is arranged in the feeding pipeline, and a feeding port is formed in the bottom of the feeding pipeline. Through the above technical scheme, the technical problem that some powdery or small-granular materials are prone to produce dust during pouring, pollute the production environment, cause material loss and increase production cost in the prior art is solved.

The application discloses a method for preparing zinc sulfate electrolyte from zinc-containing electric furnace dust, and belongs to the field of hydrometallurgy. The method uses zinc-containing electric furnace dust as raw material, and performs pre-roasting-acid leaching treatment by adding roasting aid ferrous sulfide (FeS). The steps are as follows: the zinc-containing electric furnace dust is uniformly mixed with FeS according to a certain mass ratio, and then roasted at a certain temperature for a certain time; the roasted product is added into appropriate dilute sulfuric acid for leaching, and then separated into solid and liquid through magnetic stirring and suction filtration to obtain zinc sulfate solution and iron-containing leaching residue. The generated zinc sulfate solution can be used as electrolyte for electrolytic zinc, and can be directly sent to an electrolytic zinc plant for electrodeposition to prepare metal zinc; the iron-containing leaching residue can be returned to an iron smelting plant for iron smelting process. The application ingeniously uses FeS to pre-sulfate Zn in the form of ZnO and ZnFe2O4 in the zinc-containing electric furnace dust into zinc sulfate, and then completely converts it into zinc sulfate through dilute sulfuric acid leaching, so that zinc in the zinc-containing electric furnace dust is simply and efficiently extracted. The leaching rate of zinc is as high as 95.33%, and the leaching rate of iron is only 0.17%, so that most of the iron remains in the leaching residue, and the iron removal step before zinc electrodeposition can be avoided. The application can realize zinc extraction and iron separation from the zinc-containing electric furnace dust through the pre-roasting-acid leaching process, realize resource recycling of zinc and iron, realize full utilization and resource utilization of the zinc-containing electric furnace dust, and is a new method for efficiently disposing the zinc-containing electric furnace dust.

The invention provides a zinc sulfate heptahydrate preparation method for realizing spatially-induced directional crystallization through a zinc substrate curled structure, which comprises the following steps: curling a zinc sheet to form a zinc coil, and guiding a seed crystal to grow along a specific direction by utilizing geometric constraint between layers of the zinc coil in cooperation with high-speed shearing of a reaction solution, so as to prepare a ZnSO4. 7H2O crystal with high purity and uniform morphology. The ultra-low impurity residue of the material is realized, breakthrough structure stability is shown, and the product purity reaches 99.99%. Environmental tests show that the material can still keep 98% or above of the initial performance in the long-term use process, the stability problem caused by lattice distortion, impurity residues and industrial amplification in the traditional process is successfully solved, and reliable guarantee is provided for high-end material application.

The invention discloses a dechlorination reagent Ng131 as well as a preparation method and application thereof. The dechlorination reagent Ng131 is prepared from the following raw materials: tri-octyl decyl alkyl tertiary amine, bismuth molybdate and pine oil. The method comprises the following steps of: reacting the raw materials of tri-octyl decyl alkyl tertiary amine, bismuth molybdate and pine oil according to a formula ratio for 1-4 hours at the oxygen pressure of 0.5-1.0 KPa and the temperature of 200-300 DEG C; the application is the application of the dechlorination reagent Ng131 in a copper sulfate solution defluorination process. The dechlorination reagent Ng131 is stable in chlorine removal performance under high-acid and high-temperature conditions, and has efficient dechlorination performance.