54results about How to "Guaranteed leaching rate" patented technology

A decomposition method of Xinganite ore concentrate comprises steps of mixing uniformly Xinganite ore concentrate, concentrated sulfuric acid and sulphate with weight ratio of 1:0.8-2.5:0.8-1.5, roasting at 180 DEG C to 400 DEG C for 0.5h to 8h, adding roasted material in water, at 20 DEG C to 80 DEG C, agitating for 0.5h to 3h, filtering and washing, thus lanthanon, beryllium, tantalum and niobium are contained in the solution. In the invention, the Xinganite ore concentrate, concentrated sulfuric acid and sulphate are roasted and composed, and lanthanon, beryllium, tantalum and niobium are leached out by water. In assurance of lanthanon leaching ratio, leaching ratios of beryllium, tantalum and niobium are improved. The lanthanon leaching ratio of the invention reaches 90% above, which prepares for next element separation.

The invention relates to the pyrometallurgical and hydrometallurgical field of non-ferrous metals, in particular to a method for extracting nickel and cobalt from nickel laterite by chloride roasting. The method provided by the invention comprises the following steps: grinding a chlorinating agent and ore material together and uniformly pelletizing, wherein the amount of the chlorinating agent accounts for 15-20wt% of the ore material; loading an ore sample which is well ground into a porcelain crucible, covering a cover, and placing into a tube furnace for roasting, wherein the roasting temperature is 600-800 DEG C and the roasting time is 2-3 hours; leaching the ore sample after roasting with acidified water with the pH value of 2-4.5 at the temperature of 50-80 DEG C for 20-40 minutes, then performing solid-liquid separation, and performing vacuum suction filtration to obtain nickel and cobalt filtrate. According to the method provided by the invention, the laterite with low nickel content is treated by a chloride roasting technology, and the selective chlorination of the nickel, the cobalt and other valuable metals, as well as iron and magnesium is realized; by using the acidified water method to leach the valuable metals, namely the nickel and the cobalt, the hydrolysis of ferric chloride is simultaneously inhibited, the loss of the nickel and the cobalt caused by precipitation is prevented, and the high leaching rate of above 85% of the nickel and high leaching rate of above 70% of the cobalt are simultaneously ensured.

The invention provides a method for removing manganous dithionate in a pyrolusite slurry leaching solution to prepare saturated manganese sulfate slurry and manganese sulfate. The method comprises the following steps: performing solid-liquid separation to obtain pyrolusite slag and a separated solution containing manganese sulfate and manganous dithionate; performing neutral oxidation on the separated solution to remove iron and aluminum; vulcanizing to remove heavy metal; heating an obtained mixed solution of manganese sulfate and manganous dithionate to evaporate and concentrate to obtain a crystal-containing saturated solution; adding sulfuric acid or a saturated manganese sulfate solution containing sulfuric acid to decompose manganous dithionate into manganese sulfate and sulfur dioxide; discharging mixed gas of sulfur dioxide and water vapor to obtain the saturated manganese sulfate slurry without the manganous dithionate. The invention also provides a method for preparing manganese sulfate through the saturated manganese sulfate slurry prepared by the method. The method is low in cost, easy to operate, and capable of removing manganous dithionate in the leaching solution without additional subsequent purifying process, and high-level manganese sulfate product is prepared.

The invention provides a dressing technology for recycling ultra-low-level gold ore. The dressing technology for recycling the ultra-low-level gold ore is composed of an ore washing and screening system, a slime processing system, a carbon leaching system and a dump leaching system, wherein the technological raw ore is directly screened and washed, the ore sand is subjected to dump leaching, the slime is subjected to the stage classification, stage reelecting recycling particle minding and the carbon leaching, gold concentrate, dump leaching gold loaded carbon and carbon leaching gold loaded carbon of a first segment reelecting returning path and a second segment reelecting returning path are obtained, and the reelecting gold concentrate and the gold loaded carbon are sent to a gold melting plant for treatment to obtain gold ingot. According to the dressing technology, the oxidized gold ore with the gold content of the raw ore being under 0.4g/t and the mud content being above 25% is adopted, the gold dressing recycling rate reaches above 75%, the ultra-low-level gold ore resource is fully used, the gold ore resource is enlarged, the water returning use is strengthened in all steps, the corresponding work is returned according to the water returning quality, water is saved, and the ore per unit consumes under 0.23m3/t of water.

The invention discloses a pressure leaching method of zinc sulfide concentrate. The method comprises the following steps of: (a) supplying zinc sulfide concentrate powder and an acid solution into an autoclave; (b) introducing oxygen into the autoclave; (c) keeping the autoclave under the conditions with preset temperature and preset pressure and performing pressure leaching on the zinc sulfide concentrate powder at a certain stirring speed for a preset period of time so as to get leachate and leaching residue; and (d) performing the treatment on the leachate for preparation. By utilizing the pressure leaching method of the zinc sulfide concentrate according to the embodiment of the invention, sulfuric acid can be produced in the autoclave, and concentrated sulfuric acid does not need to be supplemented into a system during the pressure leaching process, so that the production cost can be greatly reduced, and the labor intensity of operation staff and the risk during the production process can be further reduced.

The invention discloses a method for extracting rubidium chloride from kaolin tailings. Firstly, the kaolin tailings are subjected to millstone mill crushing and sieving to obtain kaolin fine mineralpowder, the kaolin fine mineral powder and a leaching agent are mixed evenly, the evenly-mixed powder is poured into an acid solution which is heated in advance, acid leaching is conducted, and an acid leaching liquid is obtained; the pH of the obtained leaching liquid is adjusted to approach neutral, calcium is removed, and leaching liquid containing rubidium is obtained; and the processes that 4-tert-butyl-2-(alpha-xylyl) which is diluted by adding sulfonated kerosene is adopted for extraction, a hydrochloric acid solution is adopted for reverse extraction and the like are adopted to obtaina rough rubidium salt product, and the rough rubidium salt product is dissolved and recrystallized to obtain a rubidium salt product with high purity. The rubidium salt extraction process free of chloridizing roasting has the advantages of being simple and feasible in process procedure, low in cost, environmentally friendly, free of pollution and suitable for industrialization.

The invention discloses a method of using ferric sulfate solution to perform acid leaching on a laterite-nickel ore for extracting nickel and cobalt. The method particularly comprises the following steps: mixing magnesium oxide powder with water to prepare a magnesium oxide emulsion for later use; using a brown iron ore containing 30-55% of iron as a raw material, adding water to the brown iron ore to prepare ore pulp for later use; adding a sulfate leaching agent and the brown iron ore pulp into an autoclave to be mixed and stirred, heating the liquid to a temperature of 150-250 DEG C to perform leaching, adding the prepared magnesium oxide emulsion, when the pH value of the solution is invariable, stopping adding the magnesium oxide emulsion, then performing solid-liquid separation to obtain a filtrate containing iron filter residues and rich in nickel and cobalt. According to the method disclosed by the invention, the laterite-nickel ore atmospheric pressure leaching agent or acidic wastewater containing higher iron and the low-grade brown iron ore type laterite-nickel ore are used as the raw materials; the reaction is taken at the pressure higher than atmospheric pressure, and most of soluble valuable metals is dissolved; at last, flash evaporation and filtration are carried out to obtain the nickel (cobalt) sulfate solution with a low impurity content as well as an iron ore concentrate product with a high iron content, so that the purpose of treatment of wastes with another wastes can be achieved, and the comprehensive utilization of the resources can be realized.

The present invention discloses a production method of Tieguanyin tea leaves high in amino acid content. The production method comprises the following steps: cystine, tyrosine, aspartic acids, valine, alanine, glycine, proline, arginine and lysine are mixed evenly, and the mixture is added into water to be mixed evenly to obtain material A; and fresh Tieguanyin leaves are weighed, the material A is sprayed on the Tieguanyin leaves, the Tieguanyin leaves are air-spread, the air-spread Tieguanyin leaves are placed under gentle sunlight at 4-5 pm for 30-50 min, protease and cellulose are added, the treated Tieguanyin leaves are subjected to rocking and cooling alternately, the rocked and cooled Tieguanyin leaves are rolled, the material A is sprayed on the rolled Tieguanyin leaves, the treated Tieguanyin leaves are put into a sealed fermentation tank to conduct fermentation until 75-80% of the materials turn red, the fermented materials are air-spread to a room temperature, then the air-spread materials are sent into a green tea roasting machine to conduct enzyme deactivating, the remaining material A is added into the enzyme deactivated materials to be mixed evenly, the treated materials are dried to the moisture content of 5-8wt%, the dried materials are baked, and the baked materials are cooled to a room temperature to obtain the Tieguanyin tea leaves. The Tieguanyin tea leaves are high in amino acid content, unique in taste, simple in technology, and low in costs.

The invention relates to the field of roasting of cobalt sulfide copper ores, and provides a novel technology for roasting a cobalt sulfide copper ore through sulfating. The cobalt sulfide copper orepasses through a crushing machine, a vibrating screen, a bucket-type elevator, a furnace top material bin, an sulfating roaster and drum-type water cooling to obtain a finished calcine material, air is sent into the sulfating roaster through a Roots blower, smoke dust containing SO2 of the sulfating roaster sequentially passes through a cyclone dust collector and an electric dust collector and enters a sulfuric acid system for acid making. The smoke dust removed by the cyclone dust collector and the electric dust collector is spirally conveyed to the drum-type water cooling stage, and the drum-type water cooling stage is provided with an overflow opening for discharging calcine. According to the novel technology for roasting the cobalt sulfide copper ore through sulfating, the problems ofthe sulfating roasting condition of the sulfating roaster and the enter-furnace grain size of the cobalt sulfide copper ore are solved, the harm of the smoke dust containing SO2 is controlled, and thus the finished calcine quality, and the leaching rate, being greater than or equal to 96%, of copper and cobalt in the calcine material are ensured.

The invention discloses a processing device for edible oil preparation. The processing device for the edible oil preparation comprises a leaching kettle body, wherein a feeding inlet is formed in the lower side of the leaching kettle body, a liquid outlet is formed in the lower side of the leaching kettle body, a screening box is arranged above the feeding inlet, a partition board is arranged in the screening box, a filter screen is arranged in the center of the partition board, the bottom of the partition board is slidably connected with a closing plate moving horizontally, a hopper is arranged above the screening box, the hopper communicates with the screening box, a rotating rod is connected with the outside of the screening box, the leaching kettle body is provided with a cylindrical leaching box arranged horizontally, a valve is ranged on the surface of the leaching box, a plurality of liquid inlet holes are formed in the surface of the leaching box, and two sides of the leaching box are slidably connected with the inner walls of the leaching kettle body through rotating shafts. The edible oil processing device can quickly separate particles with too small particle size after the crushing of soybeans, and then continuously increases the contact area between the soybeans and leaching solvent through the rotatable leaching box to improve the soybean oil leaching yield and speed up the processing efficiency of edible oil.

The invention discloses leaching equipment for producing potassium sulfate by using metallurgy dust mud. The equipment comprises a base, a first supporting base and a second supporting base are fixedly arranged at the upper end of the base, and a leaching kettle is fixedly installed at the upper end of the first supporting base and comprises a first cylindrical structure at the upper end and a first spherical structure at the lower end; a feeding hopper is fixedly arranged on the side wall of the leaching kettle, a through hole is formed in the upper end of the leaching kettle, a sealing ballis movably arranged in the through hole, a buffer is fixedly connected to the upper end of the leaching kettle, and a supporting rack is fixedly connected to the outer side wall of the leaching kettle. According to the leaching equipment, a sulfuric acid solution can be controlled to flow into the leaching kettle intermittently, and the situation is avoided that a large amount of sulfuric acid isadded at a time, the local heat is too high, and accordingly the leaching rate of a potassium element is influenced; the leaching rate is guaranteed, sediment in the solution can be sufficiently filtered and adsorbed, the colors of other metal ions are eluted, it is guaranteed that potassium sulfate crystals which are prepared in the later period are better in color and luster, and the equipment is more convenient to use.

The invention relates to a method for preparing polyaluminum chloride from coal gangue by a microwave hydrothermal method. The raw materials consist of the following materials: 1-5g of coal gangue; 3-15 ml of 20% hydrochloric acid; the invention also discloses the preparation method which comprises the following steps: S1, crushing the coal gangue; s2, calcining and activating the coal gangue; s3, cooling; s4, mixing the materials; s5, microwave acid leaching; s6, filtering; s7, drying and weighing filter residues; s8, polymerizing and curing the filtrate; and S9, evaporating and crystallizing the sedimentation liquid. The method has the advantages that the polyaluminum chloride prepared from the coal gangue is easy in raw material obtaining and simple in process, the inorganic polymeric flocculant with high added value is prepared by properly processing the coal gangue, and compared with other acid leaching methods, the microwave method has the advantages that the acid leaching time is shortened from 1-3 h to 15 min, the solid-to-liquid ratio is reduced from 1: (3.5-7) to 1: 3, the cost is saved, the energy consumption is reduced, and the prepared product PAC can reduce the turbidity of domestic sewage of 24.740 NTU to 8.761 NTU, and the water purification effect is remarkable.

The invention relates to a method for measuring gold in secondary utilization waste, and belongs to the technical field of solid waste comprehensive utilization. The method comprises the steps of waste preparation, preparation of diluted hydrochloric acid extracting agent, stannous chloride and diluted hydrochloric acid are mixed to prepare a reducing agent; mixing the waste material with a diluted hydrochloric acid extracting agent and then carrying out leaching reaction; synchronously adding a stannous chloride solution reducing agent; the method comprises the following steps: taking gold-containing waste leachate, heating in a water bath, mixing the gold-containing waste leachate with a cyanide-free agent or an environment-friendly agent or an iodine-potassium iodide gold leaching solution, carrying out a leaching reaction, synchronously introducing micro-nano bubbles in the cyanide-free or environment-friendly leaching reaction to obtain gold-free waste leachate subjected to the leaching reaction, and calculating the leaching rate of gold according to a test result. The method has the advantages that the natural solubility of jarosite and stannate is brought into full play, andthe recovery rate of gold minerals is increased; a small amount of stannous chloride mixed solution is added as a reducing agent, the reaction is more sufficient and thorough through water bath heating, the leaching rate of gold minerals is ensured, and the gold recovery rate is high.

The invention discloses a method for leaching manganese from electrolytic manganese anode residues through sulfuric acid curing. The method specifically includes the following steps that the electrolytic manganese anode residues, sulfur powder and concentrated sulfuric acid are weighed according to requirements and used for standby application; the sulfur powder and the concentrated sulfuric acidare added in the electrolytic manganese anode residues and evenly mixed, and clinker is obtained through the curing reaction; and water is added in the clinker to conduct leaching, and a manganese-contained leaching solution and leaching residues are obtained after liquid-solid separation. The method has the advantages that the source of reducing agents is wide, the price is low, the process is simple, the manganese leaching rate is high, the operation cost is low and no secondary waste residue pollution or waste gas pollution is caused, and the problems that in the prior art, the manganese leaching cost is high and secondary pollution is generated in the leaching process can be effectively solved.

The invention discloses a heaping method using a dumping plough for a mine dump leaching field. The heaping method comprises the following steps of S1, firstly, a double-side heaping step is executedby using the dumping plough, specifically, heaping is carried out continuously on two sides of a first moving sealing-tape machine by using the dumping plough to form a first dump leaching unit, wherein the first heap leaching unit comprises two parallel material piles formed by stacking materials, and a safe distance is reserved between the two parallel material piles so as to form a valley bottom part clamped between the two parallel material piles; S2, a moving step is executed, specifically, the dumping plough and the first moving sealing-tape machine are moved out of the two ends of the valley bottom part correspondingly, and then the dumping plough and the first moving sealing-tape machine are moved to a site where another second heap leaching unit is formed; and S3, the double-sideheaping step S1 and the moving step S2 are repeatedly executed. According to the method, heaping is conducted through the dumping plough with a crawler belt, double-side heaping can be moved at a time, and the moving frequency is reduced.