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During removal, electrolyte blocks and ice crystal powder shall be installed around the tank and separated from the coke particles with steel plates(high quality garnet sand suppliers china). At the same time, the upper part of the anode shall be covered with thermal insulation plate to prevent heat loss and protect the anode from air oxidation(corundum sand). Generally, the full current can be achieved in about 24h. 

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During the melting and burning process, the heater can be moved arbitrarily to heat the cathode surface and all parts of the tank evenly, the temperature distribution of all parts is uniform, the thermal stress is small(aluminum oxide abrasive media), and the binding paste around the tank can be fully burned, so it is conducive to prolonging the service life of the electrolytic tank(high quality garnet sand suppliers china). 

During coke pellet sintering, because the resistance of coke pellet layer is much greater than that of metal aluminum, if full current is input at one time like liquid aluminum sintering(aluminium oxide blasting media), the temperature rise rate of electrolytic cell will be very fast in the early stage of melting and sintering(high quality garnet sand suppliers china). After power on and burn, about 100h, make the cathode surface temperature reach 900-950 ℃, and then pour electrolyte for start-up.

Therefore, there is only electrolyte in the tank during startup(high quality garnet sand suppliers china). What is coke particle burning method, and what are its advantages and disadvantages? In fact, if it is not handled well, it is prone to over burning, rapid coking and large cracks(aluminum oxide blasting grit). It can be burned with full current at one time without a shunt(glass bead abrasive). The condensed electrolyte plays the role of blocking the crack or repairing the defect. 

In order to balance the current distribution between the anodes, the anode guide rod and the anode bus are connected with a temporary conductive soft bus so that all the weight of each anode is pressed on the coke particles; Therefore, all anodes shall be new anodes to make the quality of each anode as consistent as possible(brown aluminum oxide). Therefore, a diverter must be equipped for preheating on the production tank series(high quality garnet sand suppliers china).

For the preheating and burning of new cells with production cells in the same series, or the restart of overhaul electrolytic cells after series production, shunt technology must be adopted(aluminium oxide blasting grit). Because the conductivity of graphite powder is between liquid aluminum and coke particles, the operation and characteristics of graphite powder sintering are also between liquid aluminum and coke particles(high quality garnet sand suppliers china).

This method has been widely used in large pre culture tanks(high quality garnet sand suppliers china). Compared with liquid aluminum sintering, its advantages mainly include(steel shot abrasive): the cathode and anode can be gradually heated and preheated from normal temperature, so as to avoid strong thermal impact on cathode and anode carbon blocks and joints (especially cathode) when the liquid aluminum is directly poured into the cold molten pool. 

What is liquid aluminum roasting method, and what are its advantages and disadvantages(white aluminium oxide)? Liquid aluminum baking method is the simplest baking method for aluminum reduction cell. Compared with molten aluminum, the resistance of coke layer between anode and cathode is much larger than that of molten aluminum, with large calorific value and fast heating rate(high quality garnet sand suppliers china). 

For the first batch of preheating and melting electrolytic cells in the new series, the current control can be gradually increased by the rectifier as required(alumina grit). At the end of melting and burning, the final melting and burning temperature is often low. Generally, the current increase speed is determined according to the preheating and heating speed, ranging from a few hours to two days and nights(high quality garnet sand suppliers china). 

If there is a defect at the bottom of the tank during preheating, it is the electrolyte rather than the aluminum liquid that seeps into the gap(silicon carbide grit). However, the disadvantages of this melting method can not be ignored: during preheating, it can not rise to full current at one time, but rise gradually several times(high quality garnet sand suppliers china). The coke particle roasting method is to lay a layer of calcined coke particles between the cathode and anode. 

In addition, the soft connection on the anode guide rod must be installed and removed, which is cumbersome. Because the thickness and density of coke particles and their contact with cathode and anode are not easy to grasp, the uneven current distribution is difficult to avoid, sometimes very significant(black corundum); During preheating, red claws, falling off and local overheating of cathode are easy to occur(high quality garnet sand suppliers china). 

The advantages of fuel fusion method are that the tank temperature can be gradually increased from normal temperature, and the heating rate is easy to control(high quality garnet sand suppliers china). What is graphite powder melting method, and what are its advantages and disadvantages(aluminium oxide sandblasting grit)? Graphite powder baking method is to lay graphite powder between cathode and anode as a resistor, and connect the anode guide rod and anode bus by soft connection.

Advantages of graphite powder roasting method(silicon carbide powder): compared with liquid aluminum melting, the cathode and idle electrode can be gradually heated and preheated from normal temperature to avoid strong thermal impact on cathode and anode carbon blocks and joints (especially cathode) when the aluminum liquid is directly poured into the cold molten pool(high quality garnet sand suppliers china); The heating rate is also faster than that of liquid aluminum.

The coke particle size is between 0-5mm (strictly control the amount of coke powder below 1mm), and its thickness is 10 ~ 30mm(aluminum oxide grit blasting). Due to the low resistance of graphite powder, the laying thickness can be thicker than that of coke particles, the particle size of graphite powder is fine, the anode is in good contact with it, and the current distribution and temperature distribution are more uniform than that of coke particles(high quality garnet sand suppliers china).

When filling electrolyte for starting, it is necessary to increase the tank temperature by effect, so that the temperature at the bottom of the tank rises too fast(220 grit aluminum oxide blast media), and bring adverse consequences such as raw material burning loss and environmental pollution caused by effect(high quality garnet sand suppliers china). The flame is generated in the upper surface space of the cathode and transmits heat to other parts of the tank through conduction, convection and radiation. 

It is still necessary to lay graphite powder and install and remove anode soft connection(pink aluminum oxide). Compared with molten aluminum melting, the operation is a little troublesome. In order to control the heating rate, only part of the current is connected at the beginning of preheating, and then gradually increase it(high quality garnet sand suppliers china). During melting and burning, the anode can not be installed in the tank temporarily to avoid oxidation of the anode.

The fuel melting and burning device includes two parts: fuel supply and combustion system (air, fuel pipeline and burner, etc.) and temperature measurement and control system. The fuel is usually oil, natural gas or gas(aluminium oxide sand). In order to keep the high-temperature gas in the tank and prevent the cold air outside the tank from channeling in, a thermal insulation cover must be added on the anode(high quality garnet sand suppliers china).