Efficient gas mixing device for magnesium alloys

Abstract

The invention relates to a magnesium-alloy high-efficient gas mixing device which comprises a mixing pot, a first gas inlet joint, a second gas inlet joint and a pressure switch are arranged at the upper side end of the pot wall of the mixing pot in a seal and perforation way, a gas outlet joint is arranged at the lower side end of the pot wall of the mixing pot in a seal and perforation way and a discharging valve is arranged at the lower side end of the pot wall of the mixing pot; a ventilation pipe that is connected with the first gas inlet joint is of a right-angle bend pipe with a pipe mouth being arranged downwards; a ventilation pipe that is connected with the second gas inlet joint is of an arc bend pipe and a pipe mouth thereof is arranged horizontally and inwards to form a rotary spraying nozzle; a carding net which can carry out the second carding and filtration to the mixing gases is arranged at the middle-lower part of an inner cavity of the mixing pot. The invention usestwo or more than two sorts of gases with different qualities for mixing, the gases are input from the gas inlet joint and injected into a mixing gas pot by the rotary spraying nozzle, so the high-pressure airflow and the fluid-state rotation movement can be formed, and two gases with different qualities are evenly and fully mixed together by the second carding and filtration by the stainless steel wire carding net. The device has the outstanding advantages of full and even mixing and stable output flux.

Description

Technical field [0001] The invention relates to magnesium alloy processing equipment, in particular to a high-efficiency gas mixing device for magnesium alloy. Background technique [0002] As the lightest engineering metal material, magnesium alloy has a series of unique mechanical properties. However, due to its relatively active chemistry and serious high-temperature oxidation, magnesium alloys have hindered its large-scale application to a certain extent. Current technical status: First, the current magnesium alloy melting furnace does not have a multi-gas mixing device. Even if there is a similar shape, it is a gas storage tank, which has no mixing effect at all. The gas consumption is greatly increased due to the direct gas release. It has adverse consequences for the human body, environment, and equipment, such as the use of sulfur hexafluoride SF6, sulfur dioxide SO2 and other gases; the second is the biggest problem of protective gas, which is that corrosive gases are m...

AI Technical Summary

Problems solved by technology

Current technical status: First, the current magnesium alloy furnace does not have a mixing device for multiple gas types. Even if there is a gas storage tank with a similar shape, there is no mixing effect at all. The gas consumption has increased sharply due to the direct pipeline release of gas. It has adverse consequences on the human body, the environment, and equipment, such as the use of sulfur hexafluoride SF6, sulfur dioxide SO2 and other gases; the second is the biggest problem with protective gas, which is the uneven mixing of corrosive gases, such as sulfur hexafluoride SF6 The use of gases such as sulfur dioxide, SO2, etc., causes the local concentration of sulfur in the atmosphere to increase, causing large-scale erosion of parts such as crucibles and quantitative pumps, and greatly reducing the service life; third, magnesium alloys are in high-temperature liquid states, due to uneven mixing of protective gases, Due to factors such as uneven coverage, a dense combustion-supporting protective film cannot be formed, resulting in serious oxidation of the magnesium alloy and a decline in the quality of the magnesium alloy; at the same time, the liquid fluidity of the magnesium alloy is deteriorated, and sticking materials, blocking the pouring pipe, etc. affect production safety and product quality

Most of the existing similar gas mixing devices are generally simple types used for common gases (such as argon arc welding gas devices), but the displacement is small, which is not suitable for use on magnesium alloy furnace equipment

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