6results about How to "Less slag" patented technology

The application discloses a method for preparing arsenic-cadmium alloy by using arsenic-cadmium acid waste liquid, and belongs to the technical field of wastewater treatment. The application realizes the selective precipitation of arsenic and cadmium in the form of Cd5H2(AsO4)4.4H2O with high purity and complete crystal form by precisely controlling the molar ratio of cadmium to arsenic in the waste liquid to be 1.2-1.6 and adjusting the pH of the precipitation to be 4-6, thereby realizing the deep removal of the two toxic elements of arsenic and cadmium, and the removal rate of arsenic can reach more than 96.70%, and the process flow is greatly reduced. The Cd5H2(AsO4)4.4H2O-based precipitation slag is converted into high-purity arsenic-cadmium alloy by carbon thermal reduction, the amount of slag is greatly compressed, and the storage and landfill of waste materials are significantly reduced. The alloy can be further used to prepare downstream products such as semiconductor materials as a high-value-added product, realizes the high-value conversion from harmful waste to high-end raw materials, and has remarkable green disposal and resource utilization benefits.

The application discloses a kind of waste lithium ion battery powder leaching methods, it is related to battery recycling technical field.Adopting ferrous sulfate as leaching agent can leach the main metal and impurity except copper in battery powder under mild conditions;Utilize nickel-cobalt slag to reduce ferric iron, while improving the main metal concentration in feed liquid without introducing new impurities;Aluminum is removed by bicarbonate to obtain aluminum slag, there is still a small amount of ferric ion in the process of removing aluminum, under the synergistic effect of a small amount of ferric ion, the aluminum slag obtained in the aluminum removal process is regular round, the aluminum content in the slag is high, the slag amount is small, the solid-liquid separation speed is fast, and the metal loss rate is low;After positive electrode powder is oxidized by ferrous ion, iron is removed to obtain purified liquid.The process of the application is simple, low in cost and highly practical, and can efficiently leach valuable metals under mild leaching conditions, and the leaching agent can be recycled.

The present application belongs to the field of metallurgy, and discloses a method for removing arsenic, antimony and bismuth from crude copper, comprising the following steps: S1. Melting crude copper raw material to obtain molten copper liquid, and controlling the temperature of the molten copper liquid to be 1150-1250 DEG C; S2. Adding a slagging agent to the molten copper liquid, and introducing oxygen-containing gas to remove impurities from the molten copper liquid; first, maintaining the oxygen volume concentration at 0.1%-0.5%, adding a part of the slagging agent to react; then, increasing the oxygen volume concentration to 1.5%-3.0%, and adding the remaining slagging agent to react; wherein the slagging agent comprises an alkaline carbonate, an oxidizing agent and a crystal nucleus inducer; the oxidizing agent is sodium nitrate or / and potassium nitrate; S3. Allowing the molten copper liquid to be separated from the slag phase, and removing the slag to obtain refined copper liquid. The method can deeply remove arsenic, antimony and bismuth, and can reduce the amount of slag, and the slag system has good fluidity and is easy to separate, so that the copper purity is improved while the recovery rate is ensured.

This invention relates to a method for separating and recovering arsenic and iron from arsenic- and iron-containing bioleaches. The specific steps are as follows: An adsorbent is added to the arsenic- and iron-containing bioleach, mixed thoroughly, and reacted. After adsorption is complete, the solid and liquid phases are separated to obtain an arsenic-iron solution free of bacterial residues. A reducing agent is added to the obtained arsenic-iron solution. After detection, all arsenic and iron are converted to trivalent and divalent valences, respectively, and the reaction is complete, yielding a solution containing low-valent arsenic and low-valent iron. An extractant is added to the reduced arsenic-iron solution to obtain an arsenic-containing organic phase and an iron-containing raffinate. The iron-containing raffinate is returned to the bioleaching process, and the organic phase is back-extracted to obtain an arsenic-containing back-extract. The back-extracted organic phase is reused to extract arsenic. Sodium hydroxide is added to the arsenic-containing back-extract, mixed thoroughly, and then benzyl chloride is added. After stirring and reacting, the mixture is allowed to stand for layering and the acidity is adjusted for crystallization. The crystals are washed and dried to obtain benzylarsine product. This invention solves the shortcomings of existing neutralization processes, such as large slag volume, difficulty in product purification, complex processes, and low arsenic and iron recovery rates. It fully utilizes the arsenic and iron resources in the bioleaching solution and has the advantages of high recovery rate, high product added value, no secondary pollution generated in the process, and low investment.

The application discloses a method for recovering nickel and copper from leaching residue of a copper nickel sulfide ore dressing concentrate, and belongs to the technical field of nickel copper sulfide ore metallurgy, and comprises the following steps: S1, heating and stirring; S2, adding water and stirring; S3, adding chemicals and stirring; S4, flotation; and S5, concentration and filtration. The method adopts segmented stirring, one segment adopts high-concentration heating and stirring, and the second segment adopts new water dilution and stirring, so that the stirring time is prolonged and the stirring is strengthened, the dissolution of water-soluble nickel and copper compounds is promoted, the nickel and copper enter water, and the nickel and copper in water return to the leaching process with the filtering backwater, so that the recovery is realized, the residue amount of the leaching residue is effectively reduced, and the nickel and copper content in the tailings is reduced. Because the leaching residue slurry is acidic, the commonly used xanthate and black medicine type flotation collectors are easy to decompose and lose effectiveness under the condition of an acidic medium, the acid-resistant collector and the foaming agent are used, the nickel and copper sulfides can be floated in the low-pH slurry system, and the nickel and copper content in the tailings is reduced. When the tailings are filtered, the colloid material is less, the filtering process is accelerated, and the turnover rate of the filter press is improved.

The utility model relates to the technical field of food processing, in particular to an oil separation vehicle, which is used for refiltering oil separated by solid-liquid separation equipment and comprises a separation vehicle body, the top of the separation vehicle body is open, the separation vehicle body is provided with a feed accommodating cavity and a discharge accommodating cavity, a first filter screen is arranged on the feed accommodating cavity, and a second filter screen is arranged on the discharge accommodating cavity. The feeding containing cavity is communicated with a liquid inlet pipe, the discharging containing cavity is communicated with a liquid outlet pipe, the feeding containing cavity and the discharging containing cavity are communicated through a second filter screen, the first filter screen is located above the second filter screen, the first filter screen forms a downward recess towards the interior of the feeding containing cavity, and oil separated by the solid-liquid separation equipment is aligned with the first filter screen. The scheme is used for solving the problem that in existing hotpot condiment production, oil in solid-liquid separation equipment is not thoroughly filtered, so that a pipeline is easily blocked.