On-line mixing gas-supply equipment for magnesium alloy smelting protection

Abstract

The on-line mixed gas-supplying equipment for magnesium alloy smelting protection mainly is formed from two portions of stand-by gas circuit and mixed gas circuit, said mixed gas circuit mainly includes nitrogen gas supply circuit, SF6 gas supply circuit, mixing tank respectively connected with the above-mentioned two gas circuits and output pipeline. In the nitrogen gas supply circuit and 5F6 gas supply circuit the mass flow detection controller, pressure regulating valve and pressure sensor are respectively set, and on the output pipeline of mixing tank the mass flow detection controller and pressure sensor are also set, the above-mentioned detection controllers, pressure sensors and pressure regulating valve are connected with computer monitoring system by means of data signal wire.

Description

technical field [0001] The utility model relates to an on-line protective gas mixing equipment for magnesium alloy smelting and heat preservation, which belongs to material processing equipment [0002] technology field. Background technique [0003] Due to the special chemical properties of magnesium alloys, there are significant differences between magnesium alloy melting and heat preservation systems and ordinary alloy melting systems. The molten magnesium on the surface of magnesium and magnesium alloys is very easy to oxidize and burn during the melting and pouring process, so special gas protection measures are required. [0004] Before the 1970s, magnesium alloy smelting was mainly protected by covering flux. Although this method can play a good role in flame retardancy, it is easy to produce flux slag inclusions, resulting in a decline in the mechanical properties and corrosion resistance of the product, which restricts the application of magnesium alloys. , and th...

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Problems solved by technology

[0004] Before the 1970s, magnesium alloy smelting was mainly protected by covering flux. Although this method can play a good role in flame retardancy, it is easy to produce flux slag inclusions, resulting in a decline in the mechanical properties and corrosion resistance of the product, which restricts the application of magnesium alloys. , and the corrosive fumes generated by the reaction of the flux and the magnesium alloy damage the equipment and deteriorate the working environment

However, the gas balance valve is a patented product with a high price. At the same time, the valve is a purely mechanical structure, and the gas flow adjustment is realized by a spring and a rubber film. There is no safe detection measure, and the accuracy of its gas pressure balance control cannot be determined.

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