51results about How to "Improve electrolysis current efficiency" patented technology

The invention relates to a low-temperature aluminum electrolysis process and electrolyte. The electrolyte consists of Na3AlF6, K3AlF6, Al2O3, AlF3 and LiF; and the electrolysis temperature is between 850 and 910 DEG C, the coefficient of an anode effect is smaller than 0.1 time / tank day, and the anode current density is 0.5 to 1.2 A / cm2. The primary crystal temperature of the electrolyte adoptingthe component formula is low and changes comparatively slowly along with the changes of the components in favor of solving the problems of uneven tank bottom current, unstable tank voltage and the like caused by sharp raising of the primary crystal temperature of a melt and cathode crusting due to directional migration of Na+ and cathode enrichment. Besides, The K3AlF6 in the electrolyte can effectively increase the capability of the melt for dissolving the aluminum oxide, and solve the problem of deposition of the aluminum oxide at the bottom of a tank. Because the electrolysis temperature is lower, the heat loss of an electrolytic tank can be greatly reduced, and the energy-saving current efficiency is high. The low-temperature aluminum electrolysis process is simple and is easy to operate, the electrolyte has reasonable components, and the low-temperature aluminum electrolysis process can effectively reduce the aluminum electrolysis temperature, inhibit the cathode crusting in the process of aluminum electrolysis, improve the current efficiency of the aluminum electrolysis and reduce the energy consumption of the aluminum electrolysis, is suitable for industrial production, andcan replace the conventional aluminum electrolysis process.

The invention belongs to the field of non-ferrous metal metallurgy, and discloses a lower-insert electrolytic magnesium cell deslagging device and a deslagging method. The device comprises an L-shaped support, a push rod, a scraper and a guiding mechanism, wherein the L-shaped support comprises a handrail section and a working section connected with the handrail section; the guiding mechanism is arranged on the working section; the push rod is arranged in the guiding mechanism; the scraper is connected with the external end part of the push rod; a pulley system is arranged on the L-shaped support, and is connected with the push rod; the push rod can make a telescopic motion along the guiding mechanism under driving of the pulley system. According to the deslagging device, the push rod can make telescopic motion by utilizing driving of the pulley system, so that the scraper can go deep to the bottom of an electrolytic cell to remove residues at the circulating port, and the problem that a traditional long hook cannot be put into each graphite electrolytic hole can be solved, so that, on the one hand, the labor operation intensity can be reduced, and the electrolysis current efficiency can be greatly improved; and on the other hand, the device is applicable to multi-stage slots and has a practical application value.

The invention relates to a prebaked anode cell and the preparation method. It comprises following steps: (1) designing the shape for prebaked anode cell; (2) adding waste corner aluminum wire produced in aluminum production process during carbon anode preparation, to improve the conductivity for cabon anode, the addition amount is 1.5- 2.0%., the aluminum wire is filled into the micropores when it is conversed into liquid from solid during calcination, to increase the carrier for carbon anode base material. The invention is characterized by saved raw material cost, easy operation and management for thermal- insulating cover material, good flowability of filled material, increased currency efficiency by 0.5%, reduced resources consumption, 4.44 ton of recovery waste aluminum, and reduced carbon dioxide emmision.

The invention discloses a double-layer aluminum cathode aluminum electrolysis cell cathode, and relates to the improvement on aluminum electrolysis cell production with aluminum as the cathode, with cryolite aluminum monoxide melt as an electrolyte and through a molten salt method. The double-layer aluminum cathode aluminum electrolysis cell cathode is characterized in that the structure of the cathode comprises an electrolysis cell body, two cathode partition walls, a cathode busbar and a cathode horizontal partition plate, wherein the two cathode partition walls are arranged in cell ledges at the two ends of the aluminum electrolysis cell body and fixedly connected with the inner walls of side cell ledges of the electrolysis cell body, the cathode busbar enters the electrolysis cell body from side channels formed by the cathode partition walls and the inner walls of the cell ledges at the ends of the aluminum electrolysis cell body, and the cathode horizontal partition plate is located in the electrolysis cell body and provided with molten aluminum through holes. According to the double-layer aluminum cathode aluminum electrolysis cell cathode, molten aluminum in which no cathode carbon block, no steel bar and no titanium boride coating exist is adopted as the cathode to replace a cathode composed of steel bars and a carbon block set. The defects that according to a traditional aluminum electrolysis cell, aluminum oxide deposit exists on cathode carbon blocks and cellular micro-batteries exist are eliminated. In the electrolysis production process, the problem that aluminum oxide and aluminum carbide which are deposited and generated at the furnace bottom pollute electrolysis molten aluminum does not exist.