- Time:Mar 25, 2023
Furnace building materials for powder metallurgy electric furnace mainly include refractory materials, insulation materials, metal materials and general building materials. The understanding of the basic properties, basic concepts, identification methods, main technical indicators and selection principles of these materials will help powder metallurgy Electric furnace design. This chapter focuses on some commonly used refractory materials and insulation materials in electric furnace construction materials, so that they can be reasonably selected when designing electric furnaces.
1. Overview of refractory materials
Materials that are resistant to high temperature and do not produce physical and chemical effects at high temperatures are called refractory materials. Electric furnaces usually operate at high temperatures, so the furnace materials are the most important. When designing and manufacturing electric furnaces, a comprehensive understanding of the performance, specific requirements, and selection principles of refractory materials is an important link to improve furnace life, reduce costs, and save power consumption.
2. Electric Furnace Requirements for Refractories
The requirements of electric furnaces for refractory materials mainly include:
(1) When used under high temperature conditions, it should have a certain degree of refractoriness without softening or melting; the lower limit of the specified refractoriness is 1580°C, and below this temperature it is not a refractory material.
(2) It can withstand the building load of the structure and the stress in operation, and it does not lose its structural strength even at high temperatures.
(3) The volume is stable at high temperature, and it will not produce excessive expansion stress and shrinkage cracks.
(4) When the temperature changes sharply, it will not be cracked and damaged.
(5) It has a certain resistance to the erosion of molten metal, slag, iron oxide scale and furnace gas, that is, it has good chemical stability.
(6) It has good wear resistance and shock resistance.
(7) The shape is neat, the size is accurate, and the tolerance is guaranteed not to exceed a certain range.
ZHENJIN REFRACTORIES is a manufacturing enterprise integrating R&D, production, sales, international trade and technical services. The company has a production plant area of 70,000 square meters, 1 new refractory material engineering technology center, and 2 domestic first-class The horizontal microcomputer-controlled batching building and 3 ultra-high temperature tunnel kilns with intelligent automatic control system can produce 100,000 tons of refractory materials per year.
ZHENJIN REFRACTORIES is committed to the research and development of refractory materials in cement, lime, non-ferrous metals, steel, glass and chemical industries, technical solution design, construction and supply of supporting products and other one-stop general contracting services, integrating production, sales, research and export Kiln overall solution service provider. The service chain runs through the entire life cycle of the project, including preliminary consultation, scheme design, R&D and production, furnace construction and safety production. Through the optimized combination of various brand products, it can meet different process requirements and create value for customers.
