32results about How to "Reduce flying loss" patented technology

The ferrophosphorus carburizing method is that waste anode carbon grain of granularity 1-5 mm is added into the intermediate frequency furnace to increase the carbon content in ferrophosphorus. The waste anode carbon grain from aluminum electrolyzing bath has greater specific weight of 1.6 g / cu cm, raised carburizing effect, less powder pollution, low carburizing cost, simple carburizing process and obviously increased carbon content in ferrophosphorus.

The invention discloses low-temperature-resistance high-toughness as-cast ductile iron, which comprises the following chemical ingredients in percentage by weight: 3.4 to 3.6 percent of C, 2.0 to 2.3 percent of Si, at most 0.2 percent of Mn, at most 0.02 percent of P, at most 0.01 percent of S, 0.035 to 0.05 percent of Mg residue, 0.015 to 0.025 percent of sigma Re residue, 0.05 to 0.1 percent ofSr, 0.15 to 0.25 percent of Ni, 0.10 to 0.15 percent of Ti and the balance Fe. The invention also discloses a production method and application of the low-temperature-resistance high-toughness as-cast ductile iron to the preparation of wind-power generator accessories, automobile accessories, boat accessories and petrochemical engineering. The low-temperature-resistance high-toughness as-cast ductile iron produced by the method provided by the invention can reach each technical index of QT400-18L of GB / T1348-2009 in the cast state, the graphitizing annealing heat treatment is avoided, the energy consumption is reduced, and meanwhile, the low-temperature-resistance high-toughness as-cast ductile iron has the outstanding advantages of stable quality and the like, and the operation is simpleand convenient.

The invention relates to an aluminum electrolytic cell crust breaking and discharging integrated device. The aluminum electrolytic cell crust breaking and discharging integrated device comprises a constant-volume device. The constant-volume device is provided with a frame body extending upwards and a material guide barrel vertically extending downwards, and the bottom of the material guide barrelis provided with an opening. A linear driving part is fixed to the frame. The inner wall of the material guide barrel is provided with an annular sealing element. The output end of the linear drivingpart is connected with a moving guide rod. The moving guide rod penetrates through a feed port, a discharge port and an opening of the annular sealing element in sequence from top to bottom. The lowerend of the moving guide rod is connected with a crust breaking hammer head. A first piston matched with the feed port, a second piston matched with the discharge port and a third piston matched withthe opening of the annular sealing element are sequentially arranged on the moving guide rod from top to bottom. The aluminum electrolytic cell crust breaking and discharging integrated device can accurately position a discharge port fire eye, can effectively prevent the situation that material shortage of an electrolytic cell occurs due to flying of aluminum oxide powder and improve the working efficiency and is convenient to maintain; the equipment cost and operating cost can be reduced, and the manual labor intensity can be reduced.

The invention discloses a production method for a large grain size cryolite, which is characterized in that Bayer process concentrate solution, caustic soda, and hydrofluoric acid are used as raw materials, and the proportion of raw materials is represented in the equation that Al: Na: F equals to 1:1.8-3:5-6; when compounding, the caustic soda is added into the Bayer process concentrate solutionwith a temperature of 90-95 DEG C, and mixed evenly to obtain the composite solution; then, the composite solution and hydrofluoric acid are gradually added into a synthesis tank, and the material feeding and agitation are carried out in the meantime, the reaction temperature is maintained between 85 and 95 DEG C, and the PH value of the reaction solution is smaller than or equal to 2; after feeding materials, the mixture undergoes an ageing process for 20 to 30 minutes; finally, the slurry is filtered, the filter cake is dried until the water content drops below 0.2%, thus acquiring the finished cryolite. The production method has the advantages that: as wet method is adopted during the production, the reaction is conducted under normal temperature, the process is simple, and easy to operate and control; the heat source is derived from the reaction heat, and the need to add a heating apparatus is avoided; by adjusting the parameters, such as the reaction temperature, PH value and ageing time, the product D50 grain size can be increased by more than 10 Mu m compared with the prior art up to 26-30 Mu m; the molecular ratio of NaF to AlF3 is adjustable, thus meeting the demands of electrolytic aluminum industry.

The invention provides a pulsating feeder, comprising an installation platform, a screw feeding mechanism, a pulsation generator and a feeding head, the screw feeding mechanism is arranged on the top of the installation platform, the pulsation generator is arranged on the bottom of the installation platform, and the The feeding hopper is used to receive the material conveyed by the screw feeding mechanism and transfer it into the molten pool of the electrolytic furnace, and the feeding head is driven by the pulse generator. The contact area between the powder and the rising hot air flow reduces the flying loss of the powder. At the same time, the feeding hopper is a certain distance away from the electrolysis furnace mouth and does not come into contact with the high-temperature molten salt, which can protect the feeding hopper.

The production process of granular cryolite and the cryolite is pelletized in a dry rolling pelletization apparatus. The cryolite produced in the method of the present invention has the following advantages: production under normal temperature, no decomposing of the product, high product quality stability, homogeneous and controllable grain size, high hardness, less breaking, pure color, low cost, low flying loss and high flowability. The produced cryolite is used mainly as flux in producing electrolyzed aluminum and has unique application superiority in automatic material feeding and protecting environment.

The invention discloses a method for preparing nanocalcium carbonate / rubber composite material, which takes calcium oxide, carbon dioxide and rubber latex as main stock, combining the preparing technology for nanocalcium carbonate and rubber together. The method comprises preparing the calcium hydroxide from calcium oxide, then adding carbon dioxide for charring and getting suspending liquid, then mixing the suspending liquid with rubber latex, through coprecipitation / coagulate, dehydration, drying etc getting the nanocalcium carbonate / rubber composite material.The method is characterized by the simple preparing process and the low production cost, the high performance because of the high degree of scatter of the the flying-off loss and nanocalcium carbonate and the decrease of the environmental pollution.

A method and device for increasing the granularity of high-chromium, low-iron and vanadium slag. Low-chromium, high-iron and vanadium slag is added to a silo, and an irregular-shaped steel block formed by low-chromium, high-iron and vanadium slag is obtained by ball milling through a disc feeder as a grinding body. Add steel balls to the rough bin of the ball mill, add high-chromium and low-iron vanadium slag and soda ash into the bin, and continuously add them into the rough bin of the ball mill through a disc feeder; The particles and powder obtained by the joint ball milling of the grinding bodies enter the fine chamber of the ball mill through the compartment plate; add steel balls into the fine chamber of the ball mill, continue the ball milling, and then magnetically separate and sieve to obtain high chromium and low iron vanadium fine slag. The operation is easy, the process is reasonable, the grinding time is short, the particle size of the vanadium concentrate is fine, the proportion of the 140-mesh sieve is increased, the roasting effect of the vanadium concentrate is good, the conversion rate of vanadium is high, the output is large, and it has low cost and high benefit.

The embodiment of the invention relates to the technical field of aircraft, and discloses a flight control method, device, terminal equipment and flight control system of an aircraft. Wherein, the method is applied to the terminal equipment, and the terminal equipment is connected to the aircraft in communication. The aircraft includes a gimbal and a photographing device mounted on the gimbal. The method includes: determining the target point in the image, and the image is the current position The image captured by the photographing device; according to the target point, the flight direction and the flight distance of the aircraft are determined; and the flight of the aircraft is controlled according to the flight direction and the flight distance. This method can accurately control the aircraft to fly to the target point input by the user, and control the aircraft to stop flying immediately after the aircraft flies to the target point, so as to realize the flight control effect of pointing to where to fly, so that the user does not have to fly the aircraft to the desired point. It can be manually stopped after the location, which effectively improves the user experience.

The invention discloses a rare earth electrolytic tank for producing rare earth and alloys thereof. The rare earth electrolytic tank comprises an electrolytic tank body, a cathode group structure, ananode group structure and a tank upper portion structure, wherein the electrolytic tank body comprises a tank shell and a tank lining, the tank upper portion structure comprises a vertical column girder frame, a material feeding system, a shell ramming system, an anode lifting and busbar switching system and a tank hood plate, the upper end of the anode group structure is connected with the anodelifting and busbar switching system, anode blocks at the lower end are vertically inserted in electrolyte inside the tank body, the parts, exposed outside the electrolyte level face, of the anode blocks are covered by an anode covering material, the anode lifting and busbar switching system is used for adjusting the polar distance between the anode blocks and the cathode group structure, the material feeding system, the shell ramming system and the anode lifting and busbar switching system are integrated into an intelligent tank control system, the upper edge of the tank hood plate is connected with the edge of the side portion of a horizontal hood plate, and the lower edge of the tank hood plate is connected with the upper surface of the tank shell to realize closeness of the electrolytictank. By means of the rare earth electrolytic tank for producing the rare earth and the alloys thereof, rare earth electrolytic tank automatic continuous, high-efficiency, low-energy-consumption, low-cost and clean production is realized.

The invention belongs to the technical field of metallurgical industry, and in particular relates to an aluminum electrolytic cell ultra-fine or low bulk density powder feeder, comprising a shell, a first compression device, a second compression device and a discharge pot; the inner cavity of the shell is opened There is a cavity communicating with the outside, a feed port is opened on the side wall of the housing, the top of the first piston is fixedly connected to the other end of the first driving rod; the second piston is connected to the second A compression chamber is formed between the piston rods, the side wall of the compression chamber is provided with a compressed air inlet, and the bottom of the discharge pot is provided with a diversion groove connected thereto. Compress the volume of the material, and use compressed air to discharge the material from the diversion tank to the electrolytic cell at a certain initial speed, which can effectively reduce the flying loss of ultra-fine powder and materials with low bulk density, and improve the effectiveness of feeding. Simple and reliable, good sealing, easy maintenance, can adapt to long hours of work.

The invention relates to ecotype coal surface curing agent and the preparing method. It includes the following steps: using polyvinyl alcohol, corn starch as basic material, and water as solvent; grafting modification for the polyvinyl alcohol, corn starch; adding catalyst and oxidant to produce oxidized starch; adding caustic soda to gelatinize; adding water to dilute; adding stabilizer and cross-linking agent to prepare other component. It has the features of nontoxic, tasteless, satisfying environmental protection demand, strong coal cohesive force, wide material sources, economic, practical, and huge economic and social benefits for coal railway transportation.