Aluminium Oxide Blasting Media Suppliers Brazil

Ordinary carbon materials were first used, and then semi graphitic, semi graphitized and fully graphitized(aluminium oxide blasting media suppliers brazil). Now tib-c composite cathode materials are gradually popularized. What are the main parts of the upper structure of pre compensation aluminum reduction cell(aluminium oxide blasting media)? The types and uses of cathode paste for aluminum electrolysis are shown in the table. 

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It can effectively prevent the electrolyte from entering between the liquid aluminum and the cathode carbon block, so as to reduce the voltage drop at the bottom of the tank, reduce the erosion of the electrolyte to the cathode carbon block and prolong the service life of the cathode(aluminium oxide blasting media suppliers brazil). The physical and chemical indexes of the earliest various cathode materials are shown in the table(aluminum oxide sandblasting media). Ordinary cathode carbon block.

The common cathode carbon block for aluminum electrolysis shall comply with the industrial standard YS / t286-1999, and its physical and chemical indexes are shown in the table(black corundum). Its physical and chemical performance indexes shall meet the requirements of table(aluminium oxide blasting media suppliers brazil). TiB not only has stronger oxidation resistance and electrolyte erosion resistance than graphite, but also has good wettability to the liquid aluminum.

The appearance of various carbon blocks shall comply with the following provisions(alumina abrasive): the product surface shall be flat, and the section shall be free of holes, delamination and inclusions(aluminium oxide blasting media suppliers brazil); When the processing length is greater than 1m, the bending degree shall not be greater than 0.1% of the length; Damp and oil pollution are strictly prohibited(70 grit aluminum oxide); The surface defects of carbon blocks shall not exceed the limits listed in the table.

515mm for large pre melting tank × 400mm (width x height) full-length carbon block(pink aluminum oxide). Several grooves are processed on both sides of the carbon block to facilitate the binding and paste connection between the two carbon blocks(aluminium oxide blasting media suppliers brazil). The cathode carbon block group is the main part of the cathode structure of the electrolytic cell(aluminium oxide sand). It is in direct contact with the electrolyte and the aluminum liquid in the electrolytic cell. 

Carbon paste shall be used between and around the cathode carbon block groups of the pre culture tank, and the edge seam between the side carbon block and the cathode carbon block group shall be tamped into a slope shape to form an artificial leg extension(80 grit aluminum oxide), which is conducive to the formation of the tank side(aluminium oxide blasting media suppliers brazil). The lower part of the portal support and girder is a portal column and the upper part is a girder.

In order to eliminate the reactive power in the line, the capacitor or inductance opposite to the line itself is usually connected in parallel or in series at the AC end(100 grit aluminum oxide), which is usually called power compensator to make the current and voltage waveform consistent to improve the active power of AC(aluminium oxide blasting media suppliers brazil). The masonry method of the side carbon block bottom masonry on the large side and the small side is generally different.

The surface bonding filler must be cleaned(green silicon carbide); It is strictly prohibited to be affected by moisture and oil pollution(aluminium oxide blasting media suppliers brazil); The surface defects of carbon blocks are limited in the table. How to select the material of cathode carbon block of pre molten aluminum electrolytic cell(aluminum oxide for sale)? The two small faces are poured with impermeable and heat-insulating castables, and the two big faces are laid with ordinary refractory bricks. 

If the widths of anode carbon blocks and cathode carbon blocks are not equal(120 grit aluminum oxide), the positive projection of anode carbon blocks at both ends of the electrolytic cell and the dislocation of cathode carbon blocks will make the current conducted by cathode carbon blocks at both ends of the cell not equal to that of cathode carbon blocks at other parts, resulting in uneven distribution of cathode current(aluminium oxide blasting media suppliers brazil). 

The metal structure above the pre culture tank is collectively referred to as the superstructure, which can be divided into portal support and girder, anode lifting device, shelling and blanking device, anode bus and anode group, gas gathering and smoke exhaust device(black silicon carbide). According to the practice of domestic aluminum factories, the cell life of the former type of cathode carbon block group is longer than that of the latter type(aluminium oxide blasting media suppliers brazil). 

Refractory bricks are cut into a ladder shape to restrain the legs from being too long(aluminium oxide blasting). Therefore, the large pre-cultivation tank requires proper heat dissipation performance on the side. The physical and chemical indicators are shown in the table. Four rectangular cathode steel rods are used, which are disconnected in the middle, and the two ends are energized(aluminium oxide blasting media suppliers brazil). The current density of the steel rods is not more than 2.6/em.

China's appearance shall comply with the following regulations(aluminum oxide sand): the carbon block surface shall be flat, and the section structure shall be free of holes, delamination and inclusions. What is the structure of the cathode carbon block group of the pre-cultured aluminum electrolytic cell(aluminium oxide blasting media suppliers brazil)? Two square cathode steel rods are used, the middle is disconnected, and the two ends are energized(aluminum oxide grit blasting). Portal support and girder. 

It not only undertakes the conductive role, but also bears the high temperature stress in the electrolytic cell and the aluminum and cryolite melt(garnet sand). Therefore, because the price of silicon nitride combined with silicon carbide is still relatively expensive, some factories also use composite bricks of carbon block and silicon amide combined block as the lining material in order to save the cost of the tank lining(aluminium oxide blasting media suppliers brazil). 

The design and quality of the cathode carbon block directly affect the production index and cell life of the electrolytic cell(aluminium oxide sandblasting grit), so it is required to have the following properties(aluminium oxide blasting media suppliers brazil): the lowest possible porosity (or the highest possible bulk density), good electrical conductivity, and suitable for electrolytic design The required thermal conductivity, better thermal shock resistance, better mechanical strength, and better abrasion resistance(aluminum oxide abrasive powder). 

Some large pre-melting tanks also use two rectangular cathode steel rods in the middle that are not disconnected, and cathode carbon block groups with electricity at both ends(steel grid). Better resistance to penetration of sodium and electrolyte melt, smaller coefficient of thermal expansion. The size of the cathode carbon block varies according to the capacity and geometry of the electrolytic cell(aluminium oxide blasting media suppliers brazil). Chemical corrosion(corundum sand). 

The smaller cathode carbon block of the pre-cultivation tank adopts a long carbon block of 400mm×400mm (width x height), and the length can be determined according to the needs(aluminium oxide blasting media suppliers brazil). The cathode carbon block used in the domestic large-scale pre-melting tank, due to the limitation of production equipment(alumina sand), has been using a width of 515mm for many years, which is actually unreasonable. 

The best choice should be that the width of the cathode carbon block is exactly equal to the width of the anode carbon block, so that the projection of the anode on the electrolytic cell overlaps with the cathode(aluminium oxide blasting media suppliers brazil). There is a gap of 15mm between the refractory brick and the cathode steel rod, and it is filled with refractory pellets, so that it does not hinder the elongation of the cathode steel rod at high temperatures(180 grit aluminum oxide).

With the large-scale aluminum electrolytic cell and technological progress, the material selection of the cathode carbon block has also been continuously improved(glass bead blasting media suppliers). Semi-graphite cathode carbon block. Semi-graphite cathode carbon block for aluminum electrolysis implements industry standard YS/T287-2005, destroying the rationality of magnetic field distribution and affecting the stability of electrolytic cell operation(aluminium oxide blasting media suppliers brazil).