Method for melting metal by domestic microwave oven

Abstract

The invention relates to a method for melting metal by a household microwave oven, and belongs to the technical field of melting metal. The method comprises the following steps: using cerium oxide as a stabilizing agent and using a zircite ceramic crucible containing 5 to 20 percent of cerous phosphate as a container, insulating heat around the crucible by a porzite fiber material, placing a silicon carbide ring between the crucible and the porzite fiber, putting a block shaped metal into the crucible, heating the metal by microwave in the microwave oven, taking out the silicon carbide ring after the metal is heated for 10 to 20 minutes, and continuously heating the metal. The method can melt metal with the melting point below 1,500 DEG C; and the melted metal does not adhere to the wall surface of the crucible, impurities are not introduced into the metal, and the temperature on the inner wall of a cavity of the microwave oven is lower than 100 DEG C. The method can be used for quickly melting small pieces of metal in the fields such as assaying, purifying, reclaiming and precisely casting the metal, and the like.

Description

technical field [0001] The invention belongs to the technical field of metal melting; in particular, it relates to a method for heating and melting metal with a household microwave oven. Background technique [0002] In industries such as metal analysis and testing, purification, precision casting, and scrap metal recycling, it is often necessary to melt bulk metals. The traditional method is to put the metal sample block in an alumina crucible and use traditional heating methods such as high-temperature electric furnace to melt it. The disadvantage of the class method is that the cycle is long and the energy consumption is high. The microwave heating technology developed in recent years can effectively shorten the melting time and reduce the melting cycle. There have been research reports abroad on melting metals with household microwave ovens. The technical solution is to use refractory materials and silicon carbide to build a molten pool in a household microwave oven, an...

AI Technical Summary

Problems solved by technology

There have been research reports abroad on melting metals with household microwave ovens. The technical solution is to use refractory materials and silicon carbide to build a molten pool in a household microwave oven, and then put the metal in the molten pool for melting. This scheme has two shortcomings. , one is because the refractory material will stick to the metal at high temperature, which is not conducive to the recycling of the molten pool material and is easy to introduce impurities into the metal; When the temperature is too high, it will cause deformation of the metal inner wall of the microwave oven, which limits the temperature rise of this method, and is generally only suitable for melting metals with a melting point lower than 800 °C.