16 4月 Online Degassing Device
Online Degassing Device
Online degassing device is an advanced metal purification device with built-in advanced heating elements. It effectively controls the internal temperature according to the casting process requirements. The on-line degassing device is used to remove gases and harmful impurities in aluminum and aluminum alloy solutions. Aluminum and aluminum alloys The solution is introduced into the purification equipment. Inert gas is dispersed into the solution through a rapidly rotating rotor and forms a large number of dispersed small bubbles. The small bubbles physically release hydrogen and other inclusions to the surface of the solution during the floatation process. The aluminum and aluminum alloy solutions achieve the effect of degassing and impurity removal. The rapid stirring in the solution by rotating the nozzle can also make the alloy elements of the aluminum alloy melt more uniform. Effectively improve the quality of castings.
What role does the lift system play in the device in the on-line degassing device component of the aluminum melt:
To ensure its precise positioning, two hydraulic cylinders are used as lifting devices, which are used to control the vertical up and down movement of the heating system of the graphite rotor and the U-shaped silicon carbide heater, and can be rotated in the horizontal direction of 90°. The hydraulic system is relatively stable. ,Positioning accuracy.
Online degassing device The refining effect of the aluminum alloy melt in the furnace is limited, and the melt is prone to secondary pollution in the flow process, so it is difficult to control the impurities in the melt (hydrogen, alkaline metals, non- Metal inclusions, especially in the high-temperature and rainy season from June to September each year, the ingot’s porosity, inclusions, etc. have a serious impact on its internal quality, resulting in a decrease in the yield of aluminum products. Therefore, online degassing device has always been the focus of our plant research and improvement.
On-line degassing device degassing process flow and principle
Refining gas flow: Inert gas storage tank → Online degassing device Gas control cabinet → Graphite rotor nozzle → Treated aluminum alloy melt → Purified degassing treatment.
Working principle: A degassing device is placed between the holding furnace and the casting machine. In the degassing treatment pool, nitrogen gas blown into the aluminum alloy melt is chopped by a rotating graphite rotor to form a large number of dispersed bubbles, so that the aluminum alloy liquid is Nitrogen is fully contacted in the treatment tank. According to the pressure difference and surface adsorption principle, the gas bubbles absorb the hydrogen in the melt in the melt, and adsorb the oxidation slag (large in the manner of collision, small radial interception). Rising to the surface of the melt forms scum. The aluminum alloy melt flows from the outlet of the degassing device (located in the lower part of the scum) to the casting machine, and the aluminum alloy liquid continuously enters the degassing device, nitrogen is continuously blown in, and the purification of the aluminum alloy liquid is achieved along with the purification treatment. .
On-line degassing device main components: 1. Treatment box 2. Lifting system 3. Graphite rotor 4. Control system