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Cheap Aluminum Oxide Blasting Media Suppliers UAE

According to the results of previous studies, it has been proposed that there are 5 ~ 6 kinds of anodic effect mechanisms(cheap aluminum oxide blasting media suppliers uae). With the gradual increase of anode bubbles, small bubbles aggregate into large bubbles to form a continuous gas film. Only by increasing the ambient temperature and using activated alumina catalyst can CF and GF be converted(white aluminum oxide abrasive 220 grit). At the critical current density, the anode effect occurs.


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Due to the different conditions studied by researchers, the conclusions are also different(cheap aluminum oxide blasting media suppliers uae). Now it has been clear that the anode effect caused by the use of different anodes, different electrolyte composition and different electrolytic conditions should not be explained by one mechanism(brown fused alumina manufacturers). However, in the dry cleaner, because the ambient temperature is between 100 ~ 300 ℃, the adsorption of CF and C2F by alumina is very poor.


Under the condition of electrolytic cryolite alumina melt(white aluminum oxide blast media), when using carbon anode, the anode effect will occur only when the concentration of alumina in the electrolyte decreases to a certain limit (such as Al2O3, 0.5%), and the current density of the anode exceeds the critical current density under this condition(cheap aluminum oxide blasting media suppliers uae). The reason why the anode current density increases is that the conductive area of the anode decreases(wholesale brown fused alumina).


At this time(alumina powder for sale), the reason for the decrease of conductive area is attributed to the change of interface properties between electrode and electrolyte(cheap aluminum oxide blasting media suppliers uae). When the alumina concentration decreases, the wettability between the electrolyte and the carbon anode becomes poor, and the precipitated gas is easy to enter the interface between the anode and the electrolyte(aluminium oxide blasting media). Due to the isolation of gas, the passage of current is hindered.


For example, when a considerable part of the conductive area of the anode is covered by the gas film, its effective area decreases, so that its current density increases, exceeding the critical current density under this condition, so the anode effect occurs(white fused alumina manufacturers). Based on the relevant research results, we propose the mechanism of cathode effect as follows(cheap aluminum oxide blasting media suppliers uae). Once it occurs, the cell voltage suddenly increases from 4.5V to 30 ~ 40V(aluminium oxide blasting grit).


According to thermodynamic calculation, this reaction can be strongly carried out to the right(cheap aluminum oxide blasting media suppliers uae). At 700 ℃, no matter what kind of alumina material CF passes through, cryolite alumina melt, sintered aluminum oxide tube and powdered alumina, it can be converted according to the above reaction, but the number of conversions is different(aluminum oxide suppliers usa). Before the anode effect of normal electrolytic cell occurs, the cell voltage increases.


However(china brown fused alumina manufacturers), the industrial production conditions are much more complex than those in the laboratory, such as the properties of carbon electrode, the properties of electrolyte, the addition of alumina, the working temperature of electrolytic cell, automatic control and manual treatment of electrolytic cell, etc(cheap aluminum oxide blasting media suppliers uae). First, the anode effect will occur when the alumina concentration is reduced to 1.0 ~ 1.5%, which is most cases(aluminum oxide blast media 60 grit).


In addition(aluminum oxide grit), there are several reasons for the anode effect(cheap aluminum oxide blasting media suppliers uae). There is an anode effect prediction program in the automatic control of modern aluminum electrolytic cells, which is controlled according to the relationship curve between alumina concentration and electrolytic cell resistance. When the original electrolyte is diluted, the effect can be quickly extinguished(80 grit aluminum oxide blasting media). Improper lifting of the anode will also produce the anode effect.


The most powerful proof of this mechanism is the relationship between the alumina concentration and the wettability of the carbon electrode(aluminium oxide suppliers south africa). There are patent reports that the purpose of this move is also to eliminate the gas film, expand the anode conductive area, and achieve the purpose of eliminating the effect(cheap aluminum oxide blasting media suppliers uae). There may be many reasons for the anode effect on the industrial tank. 


Although some conditions during the electrolysis have not changed(aluminum oxide abrasive suppliers), the lifting of the anode too fast causes part of the anode to separate from the electrolyte, resulting in an increase in the current density of the part of the anode in contact with the electrolyte(cheap aluminum oxide blasting media suppliers uae). The electrolytic cell moves towards the cold stroke, and the wettability of the electrolyte to the anode becomes worse, which is likely to cause the effect to occur(aluminum oxide blasting media).


Scraping the gas film at the bottom of the anode with a large squeegee can also quickly extinguish the anode effect(vietnam aluminum oxide), drop the anode, contact the aluminum liquid, and instantaneously short-circuit, use a large current to pass through the electrode to remove the gas film (should be used as little as possible); swing the anode(cheap aluminum oxide blasting media suppliers uae). The emission of perfluorocarbons (PFC) is directly related to global warming(brown corundum). 


The production of the electrolytic cell is in an unstable state, the electrodes and electrolyte are in a short-term overheating, and the current efficiency is reduced, so it should be avoided as much as possible(cheap aluminum oxide blasting media suppliers uae). Usually the concentration of CF in the atmosphere is about 70pptv, and C2F is one tenth(aluminium oxide grit suppliers). At this time, due to the occurrence of the anode effect, it will cause carbon fluoride emission and additional energy loss.


The factory also needs to retain a certain number of anode effects(how to choose white fused alumina). In order to effectively control the number of anode effects, it is necessary to master the anode effect prediction technology(white fused alumina price). When alumina is suspended in the electrolyte, the wettability between the electrolyte and the anode will be seriously deteriorated, and the anode effect will last for a long time(cheap aluminum oxide blasting media suppliers uae). Fresh and clean molten electrolyte must be added.


At the same time, with the same-point cutting technology, the anode effect can be predicted, and the number of effects per day can be controlled to the lowest(cheap aluminum oxide blasting media suppliers uae). Although most of these gases come from the semiconductor industry, it is now believed that they mainly come from the aluminum industry(aluminum oxide wholesale). At this time, stirring the electrolyte vigorously to remove the gas film on the anode can quickly extinguish the anode effect.


Aluminum (such as sweeping ash, dirty material in trenches)(aluminum oxide blast media canada). As the anode current density increases, the anode potential increases accordingly, reaching the potential of fluoride ion discharge, which can successively generate insulating surface compounds CF (discharged with gas CF4 and CGF successively)(alumina powder suppliers). Their existence also changes the interface properties of the anode(cheap aluminum oxide blasting media suppliers uae). Poor, so that the gas can stay on the interface.


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