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113 results about "Electrolytes levels" patented technology

Prebaked aluminum electrolytic tank parameter measuring method and its device

The invention discloses a method for measuring technological parameter for prebaked cell for aluminum-reduction, comprising following steps: inserting measuring probe driven by stepper motor into electrolyser, the impulse frequency of rotation rate for stepper motor continuously input into monolithic machine for counting and storing; checking electrolyte liquid surface, anode liquid surface and cathode liquid surface by relative checking circuit according to voltage change feature of different layer in aluminum cell solution, inputting relative measuring signal into monolithic machine; monolithic machine counting out polar distance, aluminum concentration and electrolyte concentration according to set mathematical model; the measured voltage is cathode voltage when the down vertical distance of measuring probe in aluminium liquid is 60- 100 mm; the polar distance, aluminum concentration, electrolyte concentration and electrolytic temperature are input into display screen by monolithic machine for real time display; the over travel-limit switch resetting measuring probe. The measuring device mainly comprises sampling machine and controlling tank; controlling tank is equipped with polarization layer measuring circuit and spacing measuring cathode pressure differential circuit; and sampling machine comprises data collecting device and operation power device.
Owner:GUIZHOU BRANCH CHINA ALUMINUM IND +1

Device and method for preparing metal needle point

The invention provides a device and a method for preparing a metal needle point. The device comprises a control circuit and an electrochemical pool, the control circuit comprises a power supply, a switch and a constant current source, the constant current source is used for maintaining constant current of the device, the electrochemical pool comprises a counter electrode, a metal wire to be prepared and an electrolyte, one end of the counter electrode is connected with a negative electrode end of the control circuit, and one end of the metal wire to be prepared is connected with a positive electrode end of the control circuit. The switch is closed, the constant current source maintains the constant current of the device, and the electrochemical pool starts reaction until the metal wire to be prepared is broken nearby the contact surface between the metal wire to be prepared and the electrolyte level. According to the device and the method for preparing the metal needle point, the constant current source is arranged in the control circuit, the constant current is maintained in the whole process of electrochemical corrosion, thereby the constant rate of electric charge reaching to the surface of the metal wire is maintained, the electrochemical reaction process is stable, the needle point with a small tip curvature radius and smooth surface can be obtained with a high repeatability, and the preparing method is simple in operation and high in success rate.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI

Preheating starting method for aluminium electrolysis cell

The invention relates to a preheating starting method for an aluminium electrolysis cell, and the preheating starting method comprises the following preheating starting processes: (1) drilling on the upper surface of a carbon or graphite electrode, and pre-embedding a heating element in the electrode; (2) heating a hearth by using a heating assembly according to a roasting curve; (3) after reaching a target temperature, adding a solid or liquid electrolyte until reaching a required electrolyte level, regulating the power of the heating assembly, and primarily building heat balance and inner hearth mold required by the electrolysis cell; (4) introducing direct current for electrolyzing a preheating electrode; and (5) gradually utilizing an electrode which normally operates to replace the preheating electrode carrying the heating element. The method disclosed by the invention can evenly heat; in the preheating process, an anode and the bus do not need flexible connection; a traditional cell of which the cathode is in an abnormal-shape structure can be effectively preheated, and an inert electrode aluminium electrolysis cell can be effectively preheated and started; and a stable electrolysis environment is built, current efficiency is improved, and the service life of the electrode is prolonged. The preheating electrode can be reused to lower electrolysis cell starting cost.
Owner:GUIZHOU BRANCH CHINA ALUMINUM IND

Low polar distance energy-saving production method for aluminum electrolysis bath

The invention discloses a low polar distance energy-saving manufacturing method for an aluminum cell, which meets the requirement of energy balance by adjustment of technical parameters on the basis of the prior art, comprising the steps that: firstly, voltage adjustment, namely the set voltage of the electrolytic cells is adjusted to be 4.1 volts in the first two weeks, adjusted from 4.1 volts to 4.05 volts in the third week, adjusted from 4.05 volts to 4.0 volts in the fourth week and adjusted from 4.0 volts to 3.99 volts in the fifth week; secondly, adjustment of the aluminum level and the electrolyte level, namely cryolites or electrolyte blocks are added for improving 1 to 2 centimeters of the electrolyte height and the aluminum level is improved 1 to 2 centimeters or so by use of three to five weeks; thirdly, improvement of the molecule ratio and reduction of the superheat degree, namely the molecule ratio is improved from the prior 2.2 to 2.3 to 2.35 to 2.45 within three to five weeks by adoption of the method for reducing the addition amount of aluminum fluorides. The improvement of the primary crystal temperature and the reduction of the superheat degree play an important role in stabilizing electrolyte production, play a certain role in formation of a hearthside and a furnace cavity, and enable the hearthside and the furnace cavity to enter the state of normal production in advance.
Owner:HENAN ZHONGFU IND

Method for preparing nanometer particles through electrochemistry discharging

The invention discloses a method for preparing nanometer particles through electrochemistry discharging, and belongs to the field of nanometer material preparation. During the process of preparing the nanometer particles, a tool electrode which is connected with a power source negative electrode and an electricity inlet block which is connected with a power source positive electrode undergo an electrochemistry reaction, bubbles are generated and the bubbles are attached on the surface of the tool electrode. As the preparation goes on, the part, below an electrolyte level, of the tool electrode is completely wrapped by the bubbles which are generated continuously, so that the tool electrode is completely isolated from an electrolyte, and therefore a voltage difference is formed between the tool electrode and the electrolyte. Then, a bubble layer of the tool electrode and a bubble layer of the surface of a workpiece are broken down to form a discharging channel, and discharging is conducted. Instantaneous high temperature and high pressure energy inside the discharging channel gasifies the electrolyte on the surface of the workpiece and then further smelts and gasifies the workpiece, corrosion-removing products are generated and dumped into the electrolyte, and the nanometer particles are formed after the products are cooled and solidified. The preparation method is low in cost and high in productivity.
Owner:江苏载驰科技股份有限公司

Apparatus and method for preparing metal probe tip

The present invention discloses an apparatus and method for preparing a metal probe tip and controlling the curvature radius of the metal probe tip. The method includes the steps as follows: 1) a magnetic metal wire to be prepared is provided; 2) one end of the metal wire to be prepared is immersed under the electrolyte level of an electrochemical cell, and the other end of the metal wire to be prepared is connected with a positive electrode side of a control circuit; 3) a switch is closed, the constant current or constant voltage of the apparatus is maintained by a constant current and constant voltage source of the control circuit, and the electrochemical cell performs reaction until the metal wire to be prepared forms the metal probe tip under the electrolyte level. The method for preparing the magnetic probe tip has fast preparing speed and high efficiency, and can control the probe tip shape. The curvature radius of the probe tip is small, the probe tip surface is smooth, and the probe tip has stable quality. Additionally, the curvature radius of the probe tip can be controlled by the adjustment of the outputted constant current value and the concentration ratio of electrolyte. The prepared magnetic probe tip can realize spinning resolution in magnetic sample measurement.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI

Cathode copper electrolytic method for changing electrolyte level and electrolytic cell

The invention relates to a cathode copper electrolytic method for changing electrolyte level and an electrolytic cell. The cathode copper electrolytic method and the electrolytic cell solve problems that the prior electrolyte level is fixed so as to generate the crystal substance on a cathode along particles and on cathode copper along a section, a residual anode is easily broken and the cathode copper drops off at an opening of a washing box. The technical scheme of the invention is to change upper level of the electrolytic level in the electrolytic process so as to effectively solve the problems. An overflow trough of the electrolytic cell realizing the change of the electrolyte level is provided with a level regulation device. The electrolytic cell comprises an external sleeve (4) and an internal sleeve (3) which is sleeved in the external sleeve (4) and forms liquid seal with the external sleeve. A lower end of the internal sleeve (3) is fit with a through hole on a bottom part ofthe overflow trough. A lateral surface on an upper end of the internal sleeve (3) is provided with a V-shaped notch (6). The external sleeve (4) is provided with a rectangle notch (7). Electrolyte level fluctuation is realized through rotating a coincidence area of the external sleeve and the internal sleeve. The cathode copper electrolytic method and the electrolytic cell of the invention can conveniently regulate the electrolyte level.
Owner:JINLONG COPPER

Rare earth electrolytic tank for producing rare earth and alloys thereof

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.
Owner:GUIZHOU BRANCH CHINA ALUMINUM IND
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