The frit furnace typically used for melting glass powder or ceramic powder, is referred to as a melting furnace. They are used in resistor furnace manufacturers for formulation experiments or industrial production, primarily to heat solid powder materials to a sufficiently high temperature to melt them into a liquid state for subsequent processing or shaping. Melting furnaces are typically designed with a specially made high-purity quartz crucible to contain and heat the materials, ensuring uniform and stable melting at high temperatures.