A microwave equipment for continuous melting of metal powder

Abstract

The invention discloses microwave equipment capable of continuously smelting metal powder. A microwave cavity of a microwave furnace is of an odd-number-hedron metal structure with no less than five planes; a microwave generator is installed on each of the side walls of the microwave cavity; the microwave generators are connected with a power source system through controlling units; a smelting crucible is installed in the microwave cavity; a temperature detection device is installed at the top of the microwave cavity; the temperature detection device extends to the smelting crucible and is connected with the controlling units in a signal mode; a conveying pipe communicating with a discharging port of a spiral feeder is installed on the smelting crucible; a feeding port of the spiral feeder communicates with a carrying bin; the carrying bin is of a closed bin capable of being opened and closed and communicates with an air supplying pipe of an atmosphere protection system; an unloading port is formed in the bottom of the smelting crucible and communicates with an overflow channel in the lower portion of the smelting crucible; a pouring trough is formed in the lower portion of the overflow channel, and the edge of the pouring trough is larger than that of the overflow channel; a pouring port is formed in the bottom of the pouring trough; a pouring control valve is installed on the pouring port; and an ingot casting machine is installed at the lower end of the pouring port. The microwave equipment capable of continuously smelting the metal powder has the characteristics that the production efficiency is high, energy consumption is low, the metal recovery rate is low, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of industrial furnaces, and in particular relates to a microwave equipment for continuously melting metal powder with high production efficiency, low energy consumption, high metal recovery rate and wide application range. Background technique [0002] With the continuous development of science and technology, metal powder and its composite materials have shown extremely important application value in metallurgy, chemical industry, light industry, electronics, national defense, nuclear technology, aerospace and other research fields. The preparation methods of metal powder are increasingly abundant, ranging from ball milling, jet milling in mechanical methods to atomization, reduction and electrodeposition in physical and chemical methods, but there are a large number of methods in these preparation methods. Unqualified products need to be remelted. Taking the production of soldering tin powder by the rotary...

AI Technical Summary

Problems solved by technology

However, due to the high production cost and high price of high-power magnetrons on the one hand, and high requirements on power supply and cooling systems, and inconvenient maintenance, it is not conducive to the popularization and application of high-temperature microwave heating and smelting equipment; Due to the limitations of the physical generation mechanism of high-power microwaves and the device process structure, the microwave power of a single magnetron is also very limited, which makes it difficult to meet the power requirements of industrial heating.

In addition, due to the low efficiency of high-power microwave heating and smelting equipment combined with low-power magnetrons, and its main body mainly adopts a rectangular resonant cavity structure closed by a metal wall, it will be unreasonable due to the unreasonable structure of the cavity and the unreasonable installation position of the magnetron. , causing the electromagnetic waves emitted by each magnetron to interfere with each other and cancel each other, the life of the magnetron is greatly shortened, and the power output of the magnetron is also affected by the resonance of the reflected wave and becomes unstable, and the uneven distribution of the microwave field strength leads to uneven heating

In order to reduce the high requirements of the low-power magnetron combination on the rectangular resonant cavity structure and the installation position of the magnetron, some high-temperature microwave heating and smelting equipment adopts a combination of multiple low-power magnetrons arranged in one direction, and then drives the magnetron by rotating the bracket. The heating material rotates so that all parts of the heating material absorb microwaves evenly to avoid local overheating, but the overall microwave power is small, so that only small-volume materials can be heated; and the sealing mechanism is complicated, which is difficult to meet the needs of continuous industrial production; and heating The presence of mechanically moving parts in the process also reduces overall reliability

In addition, there is also a method of tunneling multiple magnetrons in series to reduce the requirements on the rectangular resonant cavity structure and the installation position of the magnetrons to achieve continuous heating, but there is also a single heating power that is small, resulting in only suitable for small volume The material is heated and the heating speed is slow, and the sealing mechanism is complicated, and the dust pollution is serious, so it is difficult to achieve high temperature heating under a protective atmosphere

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