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White Fused Alumina For Refractory Manufacturers

However, this method has the advantages of small material volatilization loss during startup and good environmental conditions(white fused alumina for refractory manufacturers). However, for wet start-up, it is necessary to prepare liquid electrolyte on the production tank, which will more or less affect the technical conditions of production plant(white fused alumina manufacturers). In this way, it takes several hours or even ten hours to complete the start-up, and the start-up time is long.

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In particular(aluminum oxide blast media canada), when preparing the liquid electrolytic raw material for start-up, it is necessary to increase the cell voltage in advance to raise the electrolyte level, which is prone to melting furnace face and melting anode steel claw, so special attention should be paid(china brown fused alumina manufacturers). The initial start-up of electrolytic concentrate refers to the period from the artificial effect to the first aluminum production, which is two nights (48 hours)(white fused alumina for refractory manufacturers).

The effect time generally does not exceed half an hour, and the effect voltage is maintained at 20-30v, which is determined according to the electrolytic planting and burning temperature and the electrolyte height in the concentrate(white fused alumina for refractory manufacturers). After a certain liquid electrolyte is immersed in cathode and anode, the voltage gradually becomes stable, so it is possible to slowly increase the voltage and accelerate the melting of cryolite(black silicon carbide).

Therefore, this is because the electrolytic planting cathode is in the strongest period of sodium absorption at the beginning of the startup, and the electrolyte molecule ratio will drop quickly(brown fused alumina). In recent years, some manufacturers have adopted the so-called "no effect wet" start-up, which is to pour electrolyte into the start-up, push the high voltage to no more than 10V, and let it slowly melt solid materials(white fused alumina for refractory manufacturers). 

When this method is adopted(aluminum oxide abrasive suppliers), the sintering temperature of the electrolytic cell should be appropriately increased to prevent the poured electrolyte from condensing and affecting the starting quality(white fused alumina for refractory manufacturers). Generally, the tank voltage is used to monitor. Generally, the voltage is controlled at 10 ~ 15V(green silicon carbide). At the beginning, the voltage swings greatly, which is caused by poor contact between cathode and rigid electrode. 

Finally(brown fused alumina manufacturers), no matter what method is adopted for start-up, the solid materials must be fully melted, and the electrolyte temperature should be as high as possible, because if the solid materials input during start-up are not fully melted, they will accumulate at the bottom of the tank with precipitation(sandblasting abrasive), and it is difficult to cultivate when the temperature at the bottom of the furnace decreases after pouring aluminum water(white fused alumina for refractory manufacturers).

It is 28 (mass ratio 14) or more, and the calcium oxide content is about 5%(white fused alumina for refractory manufacturers). There are two reasons why the aluminum liquid is poured into the large-scale cell after at least 24 hours after startup(vietnam aluminum oxide): Although the cell temperature rises to nearly 1000 ℃ after about half an hour of artificial effect during startup, some solid materials are not completely melted(black aluminum oxide). Electrolyte height management(except edge masonry blocks). 

In order to prevent furnace bottom precipitation after aluminum preparation of the cell, aluminum can be poured only after maintaining a high temperature for a certain time after artificial effect, So that the raw materials added in the startup can be fully cultivated(wholesale brown fused alumina). In order to make the edges stick to the normal coking(white fused alumina for refractory manufacturers). Therefore, the voltage needs to be manually adjusted once every 3~5 hours after the port aluminum.

At this time(white aluminum oxide abrasive 220 grit), after aluminum filling, the electrolytic cell enters the production stage, which is marked by the obvious decrease of cell temperature, the electrolyte washing around the anode is normal, and the electrolyte crust begins to form on the surface around the cotton. The electrolyzer can be put into automatic feeding after starting, but adopts the control mode of timing feeding(aluminum oxide blast media 60 grit). must not be less than 2cm(white fused alumina for refractory manufacturers). 

In order to meet the measures of forming a stable network at high temperature and polymer ratio(white aluminium oxide powder), the electrolyte molecular ratio is required after startup(white fused alumina for refractory manufacturers). The important management work in the initial stage of startup includes: electrolyte composition management. The injected electrolyte needs to be prepared on the production tank(garnet abrasive suppliers). From the aluminum filling to the first aluminum tapping. must not be less than 2cm.

Therefore, during this period, it should be estimated based on the raw materials for the furnace and the amount of electrolyte poured, and appropriate soda and calcium chloride should be added(pink aluminum oxide). Watch as the side electrolyte blocks continue to melt. Generally, the electrolyte temperature is required to be as high as possible to ensure smooth extraction and sufficient fluidity when entering the starting phase(white fused alumina for refractory manufacturers). 

Generally(80 grit aluminum oxide blasting media), since the electrolyzer does not enter the normal electrolysis process at the beginning of the start-up, it is necessary to avoid excessive feeding, prevent precipitation and maintain the anode effect coefficient for 1 to 2 times, but also prevent the anode effect from repeating repeatedly(white fused alumina for refractory manufacturers). Although the time is short, the technical conditions of the electrolysis measures have undergone significant changes(how to choose white fused alumina).

Instead(white aluminum oxide blast media), let the small color seams in the cathode be filled with cryochonite first, so that the primer in the internal material will continue to burn well and the volume will expand, so that the wrong liquid will not be first(white fused alumina for refractory manufacturers). Go in. As pointed out earlier, the electrolytic cell must be maintained at a higher temperature before the lead is poured(aluminium oxide grit suppliers). Avoid prematurely letting the cathode come into contact with the lead liquid.

Precision voltage management(aluminum oxide suppliers usa). Before pouring aluminum, the voltage needs to be gradually reduced from 6~8V after artificial effect to 5~6V, and it is usually adjusted manually every half an hour or so(aluminum oxide sandblasting sand). After the aluminum is poured, the voltage needs to be gradually reduced to 43~4.5V (the specific value depends on the design standard of the heat balance of the electrolytic cell and the process conditions)(white fused alumina for refractory manufacturers). 

At the initial stage of start-up, the voltage of the electrolytic grapefruit is adjusted manually(white fused alumina for refractory manufacturers). describe temperature management(china aluminum oxide sandblasting). The fine temperature generally drops from nearly 1000°C to 970~980°C. Due to the large heat loss of the new starting tank and the rapid decrease of electrolyte level, in order to reduce the heat loss, it is necessary to add alumina to the anode for heat preservation after the map is filled(aluminum oxide blast media).

Special attention should be paid to its descending speed, and the electrolyte height should be 2%~30cm when it is first stayed out. If the height of the electrolyte is less than 30cm, cryolite must be added during the period(aluminium oxide suppliers south africa). Under the management. After more than 24 hours after starting, pour molten aluminum into the tank to make the height of the molten aluminum reach 14~18cm(white fused alumina for refractory manufacturers). Clean up the alkali residue(aluminum oxide supplier).

If the drop is too fast, an anode must be added for heat preservation and the voltage drop rate must be slowed down, while cryolite is added to supplement the electrolyte(white fused alumina for refractory manufacturers). For the electrolyzer that burns coke particles, the electrolyte must be cleaned up after startup to remove the floating alkali check(aluminium oxide blast media). The temperature of the paste tape gradually rises and enters the burning state, and the thick paste gradually scorches.

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