43results about How to "Improve chlorination efficiency" patented technology

The invention specifically discloses a system and method for high-efficiency extraction of vanadium from vanadium slag through chlorination, belonging to the fields of chemical engineering and metallurgy. By means of heat exchange between chlorination gas and chlorination flue gas, the chlorination gas is preheated; a proper amount of air is added to allow a part of coke powder to combust, thus providing a balanced supply of heat during the process of chlorination; by means of high-temperature fluidization oxidation of chlorinated slag, the chlorinated slag is treated in a comprehensive manner, and the chlorine gas is recycled; furthermore, by means of vapor-phase hydrolysis of the chlorination product vanadium oxytrichloride, a powdered vanadium pentoxide product and a hydrochloric acid byproduct are obtained; so the efficiency of chlorination is improved, the consumption of chlorine gas is reduced, the harm of the chlorinated slag is eliminated, and the problem of ammonia-nitrogen pollution caused by conventional ammonium salt precipitation is prevented. The system and method provided by the invention are applicable to extraction of vanadium from vanadium slag containing 10 to 28 wt% of V2O5 through chlorination and have the advantages of high efficiency, low energy consumption, no pollution, good economic performance, etc.

The invention relates to a method for treating an enrichment set in poor pin and extracting tin and other color metals. The method comprises the following steps of: drying and treating mineral aggregate; proportioning, mixing and pelletizing; adding a chlorinating agent and a reducing agent to the treated mineral powder in the poor tin and uniformly mixing; pelletizing; adding chlorinating agent 4-8 percent by weight of the powder and reducing agent which is 3-5 percent by weight of the powder; preheating and heating mineral aggregate pellets, heating the mixed mineral aggregate pellets in a preheated heater to rise the temperature within the limit that the collected heat of the mineral aggregate pellets is ensured to avoid causing a chemical reaction; chlorinating; volatilizing, roasting and putting the obtained hot mineral aggregate pellets in a chlorinated reactor for carrying out a chlorinating, volatilizing and roasting reaction of valuable metals at a roasting temperature of 800-1100 DEG C for a roasting time of 40-100 min; trapping and recovering valuable metal chloride; collecting and removing the mineral smoke generated in the volatilizing, roasting and putting step, cooling, trapping in a wetting mode and recovering the valuable metal chloride; circularly absorbing trapping liquid and improving the valuable metal content in a solution; and cooling the hot roasted pellets.

The invention relates to a method for promoting growth of TiC in molten slag and belongs to the field of titanium metal smelting. The method is used for solving the technical problem that subsequent purification and enrichment of the TiC are high in difficulty due to the fact that the TiC prepared from titaniferous furnace slag through carbothermic reduction is relatively small in particle size. The method for promoting growth of the TiC in titanium slag smelting, disclosed by the invention, comprises the steps of adding electric furnace dedusted dust produced during smelting into an electricfurnace during the preparation of titanium carbide slag from titaniferous feedstocks through carbothermic reduction, and carrying out smelting together with the titaniferous feedstocks and a reducer,thereby obtaining the titanium carbide slag. According to the method, the particle size of titanium carbide particles prepared by the method can reach 7 to 30 microns, a titanium carbide product withrelatively high grade can be obtained through wet magnetic separation, the dedusted dust produced during smelting can be effectively recycled, and thus, the environmental pressure is alleviated.

The invention discloses a method for extracting nonferrous metal from a waste circuit board. The method comprises the following steps that 1, the waste circuit board is pretreated so as to obtain fine-particle materials; 2, the fine-particle materials are subjected to gravity separation so as to obtain a heavy product; 3, a reducing agent, a chlorinating agent and the heavy product are subjected to heat treatment correspondingly; 4, valuable metal is subjected to a chlorination reaction; and 5, ferromagnetic materials are removed, and a concentrate of the nonferrous metal is obtained. According to the extracting method, the circuit board is crushed and heated, a mixture containing the nonferrous metal is obtained, emission of a large amount of harmful gas and solid waste is reduced, and thus the environment is protected; a wet-type shaking-table sorting method is adopted, and thus dust is avoided; and a combination of reaction material preheating and high-temperature chlorination is adopted, the chlorine retention capacity and the chlorination efficiency of the valuable metal are improved, the dosage of the chlorinating agent is decreased, the extracting process is simplified, andthe recycling cost is reduced.

The invention discloses a system and method for high-value comprehensive utilization of a high-chromium vanadium slag. Vanadium, chromium and iron in the high-chromium vanadium slag are converted through selective chlorination by a circulating fluidized bed to corresponding gaseous chlorides, and most impurities such as manganese, titanium, and silicon are remained in the chlorinated residue, so that valuable elements are separated from other impurities. The gaseous chlorides separates crude chromium trichloride by high temperature dust collection, separates crude ferric chloride by medium temperature dust collection, and separates crude vanadium oxychloride from low temperature elution. The crude chromium trichloride is dissolved and stirred to obtain an aqueous solution to recover the chromium salt; the crude ferric chloride and chlorinated residue are hydrolyzed and dechlorinated by high temperature to obtain an oxidized slag for iron production; and the crude vanadium oxychloride vanadium is subjected to sedimented purification, rectification and refinement, and catalytic oxidation to obtain high-purity vanadium pentoxide powder. By means of the system and the method, the high-value comprehensive utilization of the high-chromium vanadium slag is achieved, and the chromium chloride solution and high purity vanadium pentoxide powder are produced by the method of one-step of chlorination with multi-step recovery.

The invention provides a production system for 2,4-dichlorophenol. The production system comprises a fixed-bed reactor, which comprises a phenol feeding port, a sulfuryl chloride feeding port and a discharge outlet, and is provided with a supported metal salt catalyst; a deacidification tower, which comprises a feed inlet, a gas discharge outlet and a liquid discharge outlet, wherein the feed inlet of the deacidification tower communicates with the discharge outlet of the fixed-bed reactor; and a rectifying tower, wherein the feed inlet of the rectifying tower communicates with the liquid discharge outlet of the deacidification tower. Compared with the prior art, the production system provided by the invention has the following advantages: the supported metal salt catalyst is fixed in thefixed-bed reactor for continuous usage and is not in a same system with phenol and a metal catalyst, so impurities in a reaction solution used in a chlorination reaction are reduced, the reaction solution can be easily separated and purified, a finally rectified substance has no solid residue, and a reaction route is clean and environment-friendly.

The invention discloses a method for extracting valuable metal from low-content nonferrous metal. The method comprises the following steps: (1) pretreatment, (2) preheating, (3), high-temperature chloridizing roasting, and (4), trapping and recovery of valuable metal chloride. According to the chloridizing metallurgy method for which metal chloride is used for metal extraction, great advantages are provided when low-grade metal materials which are difficult to process are processed, and valuable metal can be extracted economically and efficiently, and the method is a universal technical scheme aiming at complex low-content nonferrous metal materials with various processing types, large resource quantities and complex ore types.

The invention belongs to the technical field of chemical metallurgy, and particularly relates to a method for preparing high-purity vanadium oxychloride from ferrovanadium fine powder. The technical problem to be solved by the invention is to provide a method for preparing high-purity vanadium oxytrichloride by effectively utilizing ferrovanadium fine powder. The method comprises the following steps: a, putting ferrovanadium fine powder into a chlorination reactor, introducing nitrogen, performing heating to 300-600 DEG C, introducing chlorine and oxygen, adjusting the total flow rate of nitrogen, chlorine and oxygen, carrying out chlorination reaction, and condensing volatile components in the reactor in the reaction process to obtain a vanadium oxytrichloride crude product; b, after thechlorination reaction is finished, stopping introducing the chlorine and the oxygen, adjusting the flow rate of the nitrogen again, and stopping introducing the nitrogen after the reactor is cooled toroom temperature; and c, distilling and condensing the vanadium oxytrichloride crude product to obtain high-purity vanadium oxytrichloride. By means of the method, the high-purity vanadium oxychloride product can be prepared, the purity can reach 99.9% or above, and meanwhile the chlorination efficiency of vanadium in ferrovanadium fine powder can be improved.

The invention discloses a preparation process of chlorinated butadiene-nitrile rubber and relates to the technical field of rubber materials. The preparation process comprises the following steps: (1) preparing raw materials; (2) plastifying a rubber material; (3) mixing the rubber material; (4) forming the rubber material; and (5) vulcanizing the rubber material. The chlorinated butadiene-nitrile rubber material prepared by the process is good in fire resistance, capable of delaying ignition, high in strength, excellent in mechanical property, and good in wear resistance, and magnetic powder, a reinforcing filler and an anti-aging agent are added into the rubber material to ensure a better heat-resistant effect; and the preparation process is simple and easy to master.

The invention discloses a manufacturing process of chlorinated rubber and relates to the technical field of rubber materials. The manufacturing process comprises the following steps: 1) preparing raw materials; 2) plasticating a rubber material; 3) mixing the rubber material; 4) molding the rubber material; and 5) vulcanizing the rubber material. The chlorinated rubber material prepared by the method disclosed by the invention has good flame retardance, capability of delaying ignition, high strength, excellent mechanical properties and good wear resistance, can be suitable for long-term friction and can prevent damages; and furthermore, an environment-friendly flame retardant is added in the mixing process, so that the flame retardance is further improved, and the preparation process is simple and easy to grasp.

The invention discloses a novel sewage processor, which comprises a fuselage, a liquid chlorine tank arranged on the top left side of the fuselage, and a chlorine adding device arranged on the top right side of the fuselage. Liquid chlorine chamber, the extension section at the bottom of the liquid chlorine chamber protrudes into the fuselage, the liquid chlorine chamber is connected with a mixing component, the fuselage below the liquid chlorine chamber is provided with a first chamber, and a conversion device is installed in the first chamber , the body above the right side of the first chamber is provided with a guide cavity, and the fuselage on the right side of the guide cavity is provided with a second chamber. The left extension tail tip passes through the right inner wall of the first chamber and is set through, and the right extension tail tip of the sliding joint groove passes through the left inner wall of the second chamber and is arranged through; the invention has simple structure, convenient operation and improved The service life and chlorination efficiency reduce the workload and can automatically control the height adjustment.