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

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 of Sr, 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 simple and convenient.

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 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 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 improving productivity of an alkaline furnace. The method comprises the following steps: (1) evaporating and concentrating of black liquor, wherein coniferous wood dissolving pulp black liquor is evaporated and concentrated by using I effect, II effect, III effect, IV effect, V effect, VI effect and super-concentration effect, so that the concentration of the treated black liquor is over 72%; (2) air volume and air pressure proportioning, wherein the primary air volume is 40000 Nm<3>/h, the primary air pressure is 1000 pa, the secondary air volume is 45000 Nm<3>/h, the secondary air pressure is 1200 pa, the tertiary air volume is 32000 Nm<3>/h, and the tertiary air pressure is 1800 pa; and (3) jet combustion, wherein black liquor jet combustion is performed by setting the aperture of a black liquor spray gun at 20 mm and setting the jet pressure at 0.08 Mpa. According to the invention, the problem of insufficient productivity of an alkalirecovery system is solved, and through adjustment of the production process, the black liquor treatment capacity is effectively improved, and the alkali yield and the steam yield are increased.

The invention relates to a method for preparing high-purity anhydrous aluminum chloride. The method is characterized by comprising the preparing process that analytically pure aluminum fluoride trihydrate and ammonium bifluoride are used as raw materials, and the steps of the preparing process include that firstly, AlF3H2O and NH4HF2 are evenly mixed in the proportion of 70:30, are loaded into a compact sintered alundum crucible and are put into a dry boiler; secondly, the temperature in the dry boiler is raised to be 150 DEG C to 180 DEG C, and the heating time is 2-3 h; thirdly, the temperature in the dry boiler is raised to be 250 DEG C to 280 DEG C, and the heating time is 2-3 h; fourthly, the temperature in the dry boiler is raised to be 500 DEG C to 550 DEG C, and the heating time is 3-4 h. The method for preparing the high-quality anhydrous aluminum chloride has the advantages that the quality stability is good, the color of the appearance is pure, cost is low, flying losses are few, the purity of products is high, and the requirement of fundamental experiment study can be met.