20 results about "Alum" patented technology

The invention discloses a method for efficiently recovering resources from brown corundum ash, which comprises the following steps: step 1, carrying out BCFA magnetic separation to remove iron, mixing and stirring according to a solid-to-liquid ratio of 1: 5, enabling the solution to flow through a magnetic rod, repeating for three times to remove most metal iron in the solution, and enriching fine-fraction ash powder by wind classification; according to the method, BCFA ash is mixed and stirred according to the solid-to-liquid ratio of 1: 5, the solution flows through a magnetic rod and is repeated for three times, most of metal iron in the solution is removed, iron is recycled in the solution, then gallium is adsorbed to the alkaline metal solution through alkaline resin, the gallium is separated from other metals, and the BCFA ash is obtained. And further separating to obtain metal aluminum when the metal aluminum has a precipitation effect when the pH value is 13, so that iron powder is obtained firstly, alum is recycled under an acidic condition, gallium white carbon black and aluminum are recycled under an alkaline condition, and multi-stage utilization of products is realized.

The invention provides a method for extracting rubidium and cesium from mixed salt or solution containing rubidium and cesium, which comprises the following steps: S1, providing a raw material, and purifying an ionic solution containing rubidium and cesium to obtain a solution containing rubidium and cesium; s2, aluminum sulfate and sulfuric acid are added into the solution containing rubidium and cesium for preferential crystallization of cesium, and a first batch of aluminum alum crystals and a first mother solution are obtained; s3, dissolving and purifying the first batch of alumen crystals to obtain high-purity cesium salt; s4, sequentially carrying out evaporation concentration and crystallization separation on the first mother liquor to obtain a second batch of alumen crystals and a second mother liquor; and S5, fusing and purifying the second batch of alumen crystals to obtain high-purity rubidium salt, and returning the second mother liquor to the step S1 for recycling, and the method has the effects of high extraction recovery rate and low cost.

The invention discloses a method for extracting metal salts and metals from polymetallic ores or polymetallic materials. The method comprises the following steps: 1) raw material pretreatment: crushing and grinding raw materials into particles; 2) full-wet dissolution extraction: leaching corresponding acid, a corresponding oxidant, a corresponding catalyst and water from the product obtained in the step 1) by using the required metal, stirring and heating to boiling until the required metal in the raw materials is dissolved in the liquid; (3) carrying out solid-liquid separation on the leached product in the previous step, and carrying out mother liquor cooling on the mother liquor subjected to the solid-liquid separation to separate metal elements which can be subjected to alum formation and metal elements which cannot be subjected to alum formation; and (4) sequentially separating out salts of metal elements capable of forming vitriol from the metals capable of forming vitriol according to a sequence from strong vitriol forming capability to weak vitriol forming capability of the metals. The problems that in the prior art, cost is high, and pollution to the environment is large are solved.

The present disclosure is directed to apparatus and method for more efficiently and effectively refining alum process residue into commercially useable compounds. Materials that contain aluminum or aluminum oxide are provided to a vessel where a chemical rection is controlled when a product is made. Materials that include aluminum can be provided to the vessel and acid can also be provided to the vessel to initiate a chemical reaction. Masses of respective materials provided to the vessel can be controlled according to a regimen for making a product. Temperatures of the vessel can be monitored and controlled while the reaction occurs. Activated carbon may be added to the vessel to help the product performance and stability. Once the product is formed, it is output from the vessel and cooled. The product can be subsequently processed using techniques such as grinding and screening when a final product is prepared.

The invention relates to the field of wind energy map data processing, in particular to an admixture for tower drum concrete and a preparation method and application thereof.The admixture is prepared from, by weight, 10-15 parts of silica fume, 15-30 parts of microbeads, 15-25 parts of superfine slag powder, 15-25 parts of fly ash, 5-7 parts of structural self-waterproofing agent and 1-3 parts of shrinkage reducing agent; the structural self-waterproofing agent is selected from at least one of xerogel, a modified expanding agent, fluosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate and sodium dodecyl sulfate; the shrinkage reducing agent is a polyacrylate emulsion, the polyacrylate emulsion comprises an acrylate monomer and a modifier, and the modifier comprises at least one of polyethylene glycol, propylene glycol, nano silicon dioxide, glycerol, sodium silicate and alum. The problems of hydration heat control and appearance improvement can be solved at the same time.

The invention relates to the technical field of metallurgical solid waste treatment and comprehensive utilization of resources, in particular to a coprecipitation process for all-component high-value utilization of silicomanganese metallurgical fly ash, which comprises the following steps: washing the fly ash by using 20% + / -5% dilute sulfuric acid, adjusting the concentration of a sulfate solution to coprecipitate calcium magnesium alum, adding manganese powder for replacement, and crystallizing at high temperature to obtain manganese sulfate; potassium sulfate, sodium chloride and the like are byproducts. According to the technology, the high raw material recovery rate is achieved through the multi-stage countercurrent leaching and coupling selective precipitation technology, the purity of battery-grade manganese sulfate is larger than or equal to 99.5%, and meanwhile the low-aluminum requirement of the silicon fertilizer raw material is met. The process is efficient and environment-friendly, and the resource utilization rate and economic benefits are remarkably improved.

The invention relates to the technical field of acid-making tail gas treatment and leaching systems of zinc hydrometallurgy, and discloses a zinc hydrometallurgy acid-making tail gas desulfurized liquid recycling method which comprises the following steps: performing two-stage absorption desulfurization on acid-making tail gas by using a sodium hydroxide solution to generate sodium nitrite absorption liquid; carrying out aeration oxidation on the sodium nitrite absorption liquid to obtain oxidized liquid mainly containing sodium sulfate; the oxidized liquid is sent to a leaching process to wash zinc-containing filter residues; and finally, returning the slag washing liquid to the alum precipitation process, so that sodium ions in the slag washing liquid are utilized as a alum precipitation agent. The two-stage sodium hydroxide desulfurization process is adopted, the desulfurization efficiency is high, meanwhile, the sodium nitrite absorption liquid generated through desulfurization is completely oxidized and reused in the production process, external discharge of the wastewater is thoroughly eliminated, zero discharge of the desulfurized liquid is achieved from the source, and the pressure of tail-end sewage treatment of enterprises and the environmental protection risk are greatly relieved.

The embodiment of the present application provides a method for recovering copper and aluminum from copper-coated aluminum processing waste, and relates to the technical field of hydrometallurgy. The method comprises the following steps: using an electrolytic cell provided with an anion exchange membrane, the anion exchange membrane separates the electrolytic cell into an anode area and a cathode area; placing the copper-coated aluminum processing waste as an anode in the anode area and a cathode in the cathode area; filling the anode area with an anolyte containing sulfuric acid and an alkali metal sulfate, the alkali metal being potassium, rubidium or cesium; filling the cathode area with a catholyte containing sulfuric acid and copper sulfate; electrolyzing under power, depositing metallic copper at the cathode, generating alum precipitate in the anode area, and recovering the metallic copper and the alum precipitate respectively. The method for recovering copper and aluminum from copper-coated aluminum processing waste in the embodiment of the present application electrolyzes the copper-coated aluminum processing waste by electrolysis, the copper in the waste is preferentially dissolved, the exposed aluminum is synchronously dissolved and immediately combined with alkali metal ions and sulfate radicals in situ to generate alum precipitate, thereby realizing efficient and complete separation of copper and aluminum components.

The present application relates to a kind of vanadium electrolyte based on acidic vanadium-rich liquid and its preparation method.The technical scheme is: in acidic vanadium-rich liquid, ammonium sulfate or ammonia is added, low-temperature ammonium alum crystallization is carried out to remove aluminum, and clear liquid is obtained after solid-liquid separation;After adding reducing agent to the clear liquid, the pH value is adjusted to 0.5-1.5, and the original liquid is obtained;The original liquid is extracted with saponified organic phosphonic acid extractant, and the loaded organic phase is washed with dilute acid and then back-extracted with sulfuric acid;The back-extracted liquid obtained by back-extraction is deoiled to obtain vanadium electrolyte.The present application has low preparation cost, is environment-friendly, has low extraction pH value and wide technical adaptability, the prepared vanadium electrolyte product has high concentration and high battery efficiency, effectively realizes the separation of impurities and the enrichment of vanadium in acidic vanadium-rich liquid.

The application discloses a kind of based on non-complex state manganese oxidation technology's reclaimed water preparation method, it is related to reclaimed water preparation technical field, including following material: phosphate buffer, potassium permanganate, ferrous sulfide, modified chitosan, modified polyaspartic acid, glutamic acid diacetic acid tetrasodium;The application maintains water quality alkaline environment by adding phosphate buffer, greatly inhibits the risk of toxic gas generated by ferrous sulfide hydrolysis, guarantees the safety of preparation process;The modified chitosan added, by electric neutralization and adsorption bridging, small precipitate is quickly flocculated into sedimentable alum flower, realizes mud-water separation;By adding modified polyaspartic acid, can prevent the scale formed by precipitation in irrigation pipeline or equipment, and glutamic acid diacetic acid tetrasodium synergistic effect, jointly ensure the chemical stability of reclaimed water in storage and conveying process, protect irrigation system, water quality long-term stability.

The invention discloses an ardealite purification and innocent treatment method and application, and particularly relates to the technical field of ardealite treatment.The ardealite purification and innocent treatment method comprises the following steps that ardealite is screened in a classified mode through a double-layer vibrating screen, mechanical impurities with the particle size larger than 100 micrometers are removed, 5-100-micrometer undersize materials are collected and ground through an airflow mill till the specific surface area is larger than or equal to 200 m < 2 > / kg, and pretreated ardealite is obtained. A multi-stage purification system is realized through ultrasonic and ozone synergistic washing in combination with alum sludge modified zeolite adsorption and membrane separation interception, an impurity adsorption layer on the surface of ardealite can be effectively destroyed by an ultrasonic cavitation effect, organic pollutants can be effectively decomposed by ozone oxidation, and phosphorus, fluorine ions and iron-series impurities are accurately captured by an adsorbent, so that the purification efficiency is improved. Residual pollutants are deeply intercepted by a membrane system, finally, the removal rate of phosphorus and the removal rate of fluorine both exceed 95%, toxic and harmful impurities in the phosphogypsum are effectively removed, and purification and harmless treatment of the phosphogypsum are efficiently achieved.

This invention relates to the field of wastewater treatment technology, specifically a method and system for microwave-assisted treatment of electroplating wastewater and recovery of valuable metals. The method includes pretreatment based on specific characteristics, advanced treatment, and resource recovery. Pretreatment is used for acidic cleaning, cyanide-containing, chromium-containing, and copper-nickel-containing wastewater, employing microwave-Fenton, microwave, microwave-assisted, and microwave gas-liquid membrane processes respectively. Advanced treatment utilizes a multi-layer coupled reaction tower to achieve microwave radiation, catalytic ammonia nitrogen decomposition, and ZIF-8@cellulose adsorption. Resource recovery employs segmented acid washing desorption-electrowinning to recover copper and nickel, chromium alum crystallization, and calcination to produce ZnO. The system includes corresponding pretreatment, advanced treatment, and resource recovery units. This invention achieves high pollutant removal rates, copper and nickel recovery rates exceeding 98%, energy consumption per ton of water of 4.8 kW·h, and metal recovery revenue covering over 130% of treatment costs.

The application discloses a high-crystalline-water-content aluminum ammonium alum slag resourceful treatment method, which comprises the following steps: putting aluminum ammonium alum slag and silicon dioxide powder into a microwave reactor, wherein the aluminum ammonium alum slag is produced in a beryllium oxide smelting process, the main component of the aluminum ammonium alum slag is NH4Al(SO4)2·12H2O, and the water content of the aluminum ammonium alum slag is 40%-50%, and then performing microwave heating to obtain dried aluminum ammonium alum slag; and then performing high-temperature calcination to obtain a calcined sample which can be applied to the preparation of refractory materials. The method can realize efficient dehydration of the aluminum ammonium alum slag, effectively solve the problem of material puffing in the heating process and affect the treatment efficiency, greatly reduce the Be content of the leaching toxicity of the calcined product, has the advantages of good drying effect, short treatment process, full-component resource utilization, and meets the requirements of safe, efficient and green treatment of the aluminum ammonium alum slag.

The invention belongs to the technical field of extraction of lithium from lepidolite, and discloses an improved fluorine chemical extraction method of lithium from lepidolite. The method comprises the following steps: S1, crushing lepidolite and fluoride together; adding a solid material obtained after crushing into a sulfuric acid solution with the concentration of 50-90wt%, heating to 80-95 DEG C, and stirring to react for 1-3 hours to obtain viscous slurry; s2, the viscous slurry is introduced into a rotary kiln to be roasted for 1-6 h at the temperature of 800-900 DEG C; s3, crushing a solid material obtained after roasting, adding water for water leaching treatment, and filtering to obtain silicon slag and brine; s4, adding calcium oxide into the brine to adjust the pH value of the brine to 10-14, and filtering to realize primary impurity removal; adding water-soluble carbonate into the brine obtained after the first-time impurity removal, and filtering to realize second-time impurity removal, so as to obtain purified liquid; and S5, adding a lithium precipitation agent into the purified liquid to carry out lithium precipitation reaction, and filtering to obtain a lithium salt product. Roasting of the rotary kiln not only solves the problem of aluminum impurities in the water leaching process and eradicates the problem of treatment of the byproduct alum, but also reduces the problem of subsequent brine impurity removal, and further improves the lithium recovery rate.

The invention discloses a resource utilization method of potassium, aluminum, sulfur, rubidium and cesium, which can efficiently recover aluminum, potassium and rubidium sulfate resources and is used for producing lithium carbonate from lithium ores, and the method comprises the following steps: carrying out dehydration treatment and high-temperature roasting treatment on a byproduct alum to obtain a roasted material and acid gas; performing multi-stage absorption on the acid gas to prepare a first sulfuric acid solution and a second sulfuric acid solution; adding the roasted material into water, stirring and dissolving, and carrying out solid-liquid separation to obtain crude aluminum oxide and potassium sulfate enriched liquid; freezing and crystallizing the potassium sulfate enriched liquid, and separating out potassium sulfate crystals and crystallization mother liquor containing rubidium and cesium; mixing the crystallization mother liquor with the lithium precipitation mother liquor to obtain rubidium and cesium enriched liquor; extracting the rubidium-cesium enriched liquid to obtain a cesium-containing organic phase and a rubidium-containing water phase; the cesium-containing organic phase is subjected to reverse extraction, and a cesium sulfate solution and an inactivation extraction agent are obtained; extracting the rubidium-containing water phase to obtain a rubidium-containing organic phase and raffinate; and the rubidium-containing organic phase is subjected to reverse extraction, and a rubidium sulfate solution and an inactivation extraction agent are obtained.

The invention belongs to the technical field of metallurgy, and particularly relates to a directional regulation and control method for leaching arsenic from high-arsenic zinc calcine, which comprises the steps of neutral leaching, pre-neutralization, high-acid leaching, low-pollution alum precipitation and leaching residue washing. By optimizing the condition parameters of the high-arsenic zinc calcine leaching process, controllable leaching of arsenic is achieved, the concentration of arsenic in the new electrolytic solution is reduced, and an effective open circuit is achieved.

This invention belongs to the field of bauxite utilization technology, specifically relating to a method for preparing high-purity α-Al₂O₃ from bauxite using ammonium alum salt precipitation. The invention discovered that within the temperature range of 10–40°C, the yield of aluminum chloride hexahydrate crystals remains almost constant, but its precipitation rate is directly proportional to the rate at which the solution becomes saturated with HCl. This invention utilizes this property to remove impurities from aluminum chloride, repeatedly dissolving and precipitating them to obtain high-purity aluminum chloride hexahydrate. This invention prepares high-purity α-Al₂O₃ with a purity of over 99.96% through sulfuric acid leaching, ammonium alum crystallization, and hydrochloric acid salt precipitation. The process is short, simple, and easy to operate, allowing for the recycling of all materials, resulting in low production costs. Multiple filtration and desilication processes also contribute to high product added value.

The invention discloses a method for removing alum from bauxite, and belongs to the technical field of bauxite aluminum oxide smelting. Comprising the following steps: A, analyzing components of bauxite; a corresponding matching process; b, bauxite crushing and ore pulp grinding; qualified ore pulp is obtained; c, aluminum oxide dissolution and production; performing Bayer process dissolution, seed crystal decomposition and roasting to obtain aluminum oxide and sodium aluminate circulating mother liquor; d, monitoring the amount of alum in the sodium aluminate circulating mother liquor; e, carrying out alumen removal and industrial production on the bauxite circulating mother liquor; and a vanadium product is extracted by adopting a combined crystallization method. According to the method, vanadium ions in a liquid phase reach saturation and are continuously crystallized and separated out, a vanadium-rich product is obtained through liquid-solid separation, and the vanadium recovery rate can reach 40%; the resource utilization rate is improved, valuable metals are recycled, the industrial production level is improved, and the method is environment-friendly, energy-saving and efficient; accumulation and harm of vanadium in aluminum oxide production are eliminated, the influence of impurities in the sodium aluminate circulating mother liquor is solved, and the method has wide popularization value and application prospect.

The application discloses a preparation method of a concrete admixture. The preparation method comprises the following steps: firstly, mixing and stirring red mud, oxalic acid, phosphoric acid, a dispersing agent and water to form a paste-like slurry, and then wet grinding to form a slurry material; secondly, placing the slurry material in a stirring device and introducing carbon dioxide gas, sealing the device after the carbon dioxide gas fills the device, and simultaneously introducing the carbon dioxide gas, ultrasonic vibration and stirring reaction; then, adding hydrogen peroxide and stirring uniformly, continuously introducing the carbon dioxide gas until the carbon dioxide gas fills the device, sealing the device, and performing ultrasonic vibration reaction; finally, adding a silicic acid solution and calcined alum in sequence, stirring uniformly, and then performing freeze drying, and finally taking out and grinding to obtain the active concrete admixture. The red mud is activated through the synergistic effect of chemical, mechanical, gas and ultrasonic measures, the alkalinity of the red mud is effectively reduced, the activity of the red mud is excited, stable amorphous active products are formed, and finally the high-activity admixture suitable for concrete is prepared.

The invention relates to the field of petrifaction, and discloses a preparation method and application of a heavy metal adsorbent. The preparation method comprises the following steps: 1) mixing a thiolated alumina microsphere dispersion liquid with AlOOH sol; mixing the obtained compound with urea and water, and performing heating reaction to obtain an aluminum oxide microsphere compound; 2) mixing the alumina microsphere compound, charcoal, Span-80, lauryl sodium sulfate and sodium bicarbonate in a sodium alginate solution, dripping the obtained mixed solution into a calcium chloride solution containing copper ions and zinc ions, reacting, and cross-linking through glutaraldehyde to obtain a calcium alginate coated composite material; and 3) mixing water, alum and ethanol, adding the calcium alginate coated composite material, fly ash coal, charcoal, clay and zeolite, and granulating to obtain the heavy metal adsorbent. Through compounding of the charcoal, fly ash, clay, zeolite, the calcium alginate coated composite material and the like, the prepared heavy metal adsorbent can efficiently remove various heavy metals in naphtha.