With the widespread application of induction electric furnaces, the use of induction electric furnaces for melting almost covers all metal alloys. Gray cast iron, alloy cast iron, and nodular cast iron together account for 49%, and ordinary cast steel and alloy cast steel together account for 34%. It should be particularly pointed out that in the field of non-ferrous alloy casting production, although the proportion of induction electric furnaces used in the non-ferrous alloy industry accounts for 15%, due to the adaptability of electric furnace structure, melting temperature, production methods and metallurgical characteristics, induction electric furnaces are used in The application range of non-ferrous metal casting is relatively narrow. In actual production, it is only used to undertake the task of heat preservation. If an induction electric furnace that integrates melting and heat preservation can be designed to realize the continuous supply of non-ferrous metal liquid, it will definitely promote the development of the non-ferrous metal casting industry. The rapid development will also bring a broad market space for induction furnace manufacturers.
In China’s production enterprises, induction electric furnaces with a melting capacity of less than 1t account for 28%, 1-2t accounted for 18%, 3-5t accounted for 22%, 6-10t accounted for 14%, and 11-20t accounted for 13%. 5% above 20t. The size of the smelting furnace model is mainly determined by factors such as production scale, product structure, and enterprise characteristics. It reflects from the side that small and medium-sized enterprises in China account for the majority, and the industrial concentration is low. It is believed that with the continuous development of China’s foundry industry cluster construction and the continuous deepening of industrial structure adjustment, the proportion of large, medium and small manufacturers will tend to be reasonable, and the application of medium and large induction furnaces will increase moderately. However, from the perspective of practical applications, the manufacturing and technical application of small induction furnaces are becoming more and more perfect, while medium and large induction furnaces cannot fully meet the production needs in terms of circuit control system, cooling system and service life. Equipment manufacturers and casting production are required. Application enterprises work together to improve the performance indicators of induction furnaces and promote the development of induction melting technology.
Select the influencing factors of induction furnace application The influencing factors of induction furnace application. The influencing factors of the application of induction electric furnace can be seen. Among the five factors that mainly affect the purchase and application of enterprises, including energy saving and environmental protection, melting quality, safety, cost performance and service life, 26% of people choose energy saving and environmental protection, and choose melting quality It’s 22%, safety 20%, cost performance 18%, and service life 14%. With the continuous improvement of energy saving and environmental protection requirements, people’s awareness of green environmental protection has been continuously enhanced, and the country’s increased supervision of environmental protection indicators has made enterprises attach great importance to energy conservation and environmental protection performance indicators when purchasing equipment, and the application of induction electric furnaces has adapted This development demand. However, it should be pointed out that for induction electric furnaces, environmental protection is unquestionable, but there are different views on energy conservation. Since the electricity used by induction electric furnaces is a secondary energy source, the smelting process consumes a lot of power and it is difficult to produce continuously. Electricity supply conditions vary greatly from place to place, so from a purely energy-saving perspective, energy-saving technologies have much room for improvement.
Industry Focus Industrial heating manufacturing technology topics are quite different from the traditional cupola smelting process. The induction furnace has no overheating zone, it is difficult to increase carbon and flow, and the post-treatment process is also different. Although the industry has conducted long-term exploration on the induction smelting process, The quality of molten iron still has problems such as low subcooling, difficult to control the nitrogen and oxygen content, and abnormal ductile structure, resulting in unstable molten iron quality. These problems are particularly prominent when producing high-end products. In this investigation, most of the engineers on the production line suggested that equipment manufacturers should increase technical support for production and application enterprises to ensure the quality of smelting. Smelting is a high-risk process, and companies attach great importance to safety when choosing electric furnaces. In actual applications, the reliability of the alarm system is particularly important. The ability to monitor all locations is also very concerned by companies. These aspects need to be improved.
Cost-effectiveness is more important to enterprises in the initial stage of the development of the industry. There are tens of thousands of foundry enterprises in our country, and small and medium-sized enterprises account for the majority. The pursuit of cost-effectiveness still occupies a relatively important position for a long time. However, with the increase of industrial concentration and the increase of medium and large enterprises, this indicator is constantly weakening for enterprises with financial strength and taking into account the comprehensive costs such as maintenance. Although the service life is ranked lower among the various performance indicators investigated, there are many feedback problems, such as fewer furnace linings, bottlenecks in the application of cooling systems in northern regions, and the durability of electrical system components Low-level problems are all left to electric furnace manufacturers to be solved urgently.
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