42results about How to "Low leaching temperature" patented technology

The invention discloses a production process for gallium flotation in fly ash, which comprises the following steps: a. Take a certain amount of fly ash from Qinghai West Mining Tanghu Power Plant and add it to the flotation machine, and the powder Gallium content is 25 grams per ton in the coal ash; b. add a certain amount of flotation adjustment agent such as water glass, octadecylamine flotation agent and foaming agent such as No. 2 oil etc. in the flotation machine; c. adopt a coarse Flotation is carried out at room temperature in the one-sweep flotation process; d. Gain a gallium concentrate with a gallium grade of 40 g / t, and the recovery rate is 90%. The invention solves the problem that the gallium content in the fly ash that exists in the existing process of directly leaching gallium from the fly ash is relatively low, the processing capacity of the direct acid leaching or alkali leaching process is large, and the amount of leachate required is also large, resulting in High recovery cost, large consumption of raw materials, and serious environmental pollution. By using the fly ash flotation gallium process, the amount of ore to be processed can be reduced by 50% without reducing the recovery rate much, which greatly saves the cost of leaching. .

The invention relates to the technical field of novel material processing, and discloses a method for preparing zinc oxide from a material recovered from zinc-containing anticorrosive paint waste. Through pretreatment of the zinc-containing anticorrosive paint waste, the influence of hydrolysis of organic matter in paint on leaching extraction separation purification in a next step is reduced, theleaching rate is improved, the separation difficulty is reduced, the leaching time is shortened, the leaching temperature is reduced, and the acidity of a leaching solution can be selected at a lowerlevel range; in the extraction process, an extraction reagent and control conditions are selected to achieve high-efficiency low-energy consumption extraction results, finally the zinc oxide is prepared through recovery, the recovery rate is increased by 15-20%, the impurity content is less than 0.001%, and the purity reaches a class-I standard; and the method can significantly improve the quality of the zinc oxide prepared through recovery, reduce energy consumption and save costs, the recovery rate reaches 94% or more, the problems of a complex process, high energy consumption, a low yieldand low quality of current raw ore zinc pyrometallurgy can be solved, and the economic and social benefits are significantly improved.

The invention belongs to the field of hydrometallurgy and inorganic chemical industry, and particularly relates to a method for extracting manganese from low-grade high-silicon manganese ore containing manganese silicate minerals. The method comprises the technological steps as follows: pretreatment: adding concentrated sulfuric acid to high-silicon manganese ore powder containing 30%-50% of the manganese silicate minerals for aging treatment; leaching: a, adding a pretreated product to water for leaching and separation to obtain a manganese leachate 1 and leached residues; b, adding high-silicon manganese ore to the manganese leached liquid 1, and performing separation to obtain a manganese leached liquid 2 and a solid-phase leached product; treatment of the solid-phase leached product: mixing the solid-phase leached product with concentrated sulfuric acid for aging treatment, and performing separation to obtain a manganese leached liquid 3 and leached residues, and returning the leached liquid 3 to the step b to be used as a leaching agent for leaching high-silicon manganese ore. Under milder conditions, rhodochrosite minerals in the ore can be fully extracted, manganese silicate can be converted into manganese sulfate, the leaching rate of manganese can reach about 90%, and accordingly, the recovery rate of manganese is greatly increased, industrial implementation is easier and the method is environment-friendly.

The invention relates to a technology for extracting coenzyme Q10 in bacterial cells, which pertains to the technical field of microbiology engineering. Thalli is automatically and quantitatively put into from the dog-house of a continuous countercurrent device under the control of a weigh-instrument, a solvent is injected from a solvent inlet under the control of a flowmeter and the leaching solution and the thalli form reverse continuous countercurrent leaching process under the push of a shovel-like thruster; the concentration gradient is large, relative movement exists between the solventand the thalli and the thalli moves from the left end to the right end of an extraction container continuously under the function of the shovel-like thruster while the solvent moves from the right end to the left end of the container under the action of pressure; a diffusion boundary layer is thin and fast to be updated and the coenzyme Q10 is extracted after 2 to 10 hours of reaction of the thalli which enters from the left end of the device after the contact of the solvent and the thalli; the thalli enters a rake type dryer from the right end of an extraction device by press treatment and residual organic solvent in the thalli is treated with drying treatment in the rake type dryer; the yield of the coenzyme Q10 reaches more than 90 percent.

The invention relates to the field of non-ferrous metallurgy and resource recycling, in particular to a novel process for extracting vanadium from vanadium-containing waste catalyst reductive organic acid. The novel process comprise the steps that a vanadium-containing waste catalyst is directly extracted in a reductive organic acid system, and other reductive agents are not added, so that pentavalent or tetravalent vanadium is directly reduced into vanadium-oxygen-based ions or trivalent vanadium ions, the vanadium-oxygen-based ions or the trivalent vanadium ions are combined with organic acid radical anions and enter a solution, and vanadium-containing leaching liquid and vanadium-containing leaching slag are obtained; and ammonia water is added into the vanadium-containing leaching liquid to adjust pH so that ammonium vanadate can be formed and precipitated, and after separating is conducted, a vanadium pentoxide product is obtained by calcining precipitation slag. According to the novel process for extracting the vanadium from the vanadium-containing waste catalyst reductive organic acid, the vanadium is extracted by adopting the reductive organic acid system; the extracting condition is mild; the vanadium extracting rate is 95% or above and higher than the direct inorganic acid fluid extracting rate; and other impurity ions are not introduced in the extracting process, so that recycling of other metal elements in the waste catalyst is not affected.

The invention discloses a method for preparing a low-iron refractory brick base material and coproducing nano iron oxide by utilizing bauxite tailings, and belongs to the field of comprehensive utilization of the bauxite tailings. According to the method disclosed by the invention, through a technological process of magnetic separation in advance-ultrasonic intensification on microbiological leachate: bauxite tailings-roasting of leach residue, the iron content in the leach residue of the bauxite tailings is selectively reduced to a large extent, so that the low-iron refractory brick base material is prepared; by virtue of ultrasonic dispersion and enrichment effects, the leachate is intensified and radiated through light, so that an ultrafine ferrous oxalate byproduct with high added value is obtained; finally, by roasting the obtained ultrafine ferrous oxalate in an oxygen flow, a high-value nano ferric oxide material can be further produced. Through the technological method disclosed by the invention, the refractoriness under load and the refractoriness of the prepared low-iron refractory brick are greatly increased, and black spots on a prepared product are reduced; meanwhile,large-amount consumption and resource utilization of aluminum industry residue of the bauxite tailings are realized, replaceable mineral resources of refractory clay are also increased, and the economic benefit, the social benefit and the economic benefit are important.

The invention relates to a method for leaching rubidium, potassium and aluminum from a rubidium-containing mica ore. The method comprises the following steps that the rubidium-containing mica ore is mixed with concentrated sulfuric acid and subjected to a curing reaction, and thus a cured material is obtained; the cured material is reduced and roasted, and thus roasted sand and flue gas are obtained; the roasted sand is leached through water, and thus a leaching solution and leaching slag which contain rubidium and potassium are obtained; and the leaching slag is leached through an alkaline aqueous solution, and thus a leaching solution containing rubidium, potassium and aluminum is obtained. Synergistic extraction of potassium, aluminum and rubidium can be achieved, and the method has the beneficial effects that consumption of an acid / alkali reagent is less, energy consumption is low, the output quantity of waste slag is small, and the impact on the environment is small.

The present invention discloses a multi-element comprehensive utilization process for phosphorus-potassium associated ore. The process comprises: firstly, a fluorine-containing compound is used as an additional aid, and a leaching reaction of the phosphorus-potassium associated ore at a low temperature under an acidic condition is implemented, so as to obtain a silica residue and a leachate. The steps of calcium removal, hydrochloric acid distillation and neutralization are then performed successively to the resulting leachate, so as to obtain a calcium sulfate residue, a heavy iron residue, a heavy aluminum residue, a heavy magnesium residue, and a filtrate. The resulting filtrate is then supplemented with phosphorus, evaporated, and concentrated, so as to obtain a high concentration of NPK compound fertilizer. According to the process provided by the present invention, the fluorine-containing compound is used as the additional aid and hydrochloric acid is used as a leaching agent to process the phosphorus-potassium associated ore. Potassium feldspar is decomposed by means of a reaction of villiaumite and an acid to generate hydrofluoric acid in situ, effectively implementing a process of complete decomposition, complete separation and complete utilization. The process has advantages of low energy consumption, a high element leaching rate, and simple subsequent treatment processes, etc. No discharge problem of three waste exists in the treatment process. In addition, the involved process is simple and the reaction conditions are mild, so that the process is easy to implement and is suitable for popularization and application.

The invention relates to a method for producing low-temperature soybean meal by the leaching method, belonging to the food industry low-temperature soybean meal production field. The method takes a soybean slice as a raw material and uses pentane as leaching solvent to perform degreasing, and then wet meal is obtained; and the wet meal enters into a desolventizer-toaster for vacuum low-temperature exsolution, and then the low-temperature soybean meal is obtained. The leaching temperature is between 15 and 35 DEG C, the leaching time is between 20 and 35 minutes and the leaching frequency is 3; the residual oil rate of the soybean meal is reduced to below 1 percent; the vacuum degree of exsolution of the wet meal is between 73 and 86 kPa; the exsolution temperature is between 40 and 60 DEGC and the exsolution time is between 0.5 to 1 hour; the residual oil rate of the low-temperature soybean meal produced can reach blow 1 percent and residual solvent is below 200 milligrams per kilogram; and the NSI value of proteins of the soybean meal exceeds 80 percent. The low-temperature soybean meal produced by the method has high protein content, complete shape, white color and no foreign odor.

The copper-nickel sulfide ammonium persulfate-sulfuric acid oxidation leaching method for extracting valuable metals of the present invention comprises the following steps: sieve the low-grade copper-nickel sulfide raw material to obtain copper-nickel sulfide mineral powder, and take ammonium persulfate and sulfuric acid raw materials in proportion , ammonium persulfate adopts one of two methods (1) after mixing all of it with sulfuric acid, mix it with mineral powder in proportion; (2) mix part of ammonium persulfate with sulfuric acid, and partly make a saturated solution; The constant temperature leaching reaction is carried out under the temperature and system pH. The saturated ammonium persulfate solution is added during the leaching process, and the leaching and filtration are completed to obtain a leaching solution. The extraction rate of valuable metal Ni in the leaching solution is 90.4-97.5%, and the extraction rate of Cu is 93.4-99.9%. The Co extraction rate is 92.7‑99.6%. This method has low leaching temperature, low concentration of sulfuric acid, less dosage, simple process flow, wide application range, ore raw materials are not limited by region, ore position, grade, etc.; the extraction rate of valuable metals is high, and there is no SO 2 emission.