Preheating system of magnetic material sintering furnace

Abstract

The invention discloses a preheating system of a magnetic material sintering furnace, and belongs to the field of magnetic material sintering furnaces. The preheating system of the magnetic material sintering furnace is provided, and adopts the solution that when the sintering furnace is normally cooled, high-temperature gas can uniformly flow to corners of a heating bin when entering the heatingbin from a connecting channel, so that uneven temperature distribution in the heating bin is not easily caused, the temperature in the heating bin is balanced left and right, preheating work is easy,cooling in the sintering kiln is regulated and controlled by controlling the power of an exhaust fan, the sintering effect of the sintering furnace is improved, meanwhile, different elastic coefficients are selected for different compression springs located on the same side wall of the connecting channel, the adjustability of the heat exchange rate between the heating bin and the connecting channel is further improved, the cooling rate in the sintering furnace can be conveniently adjusted and controlled, a magnetic core blank can be dried in advance through the preheating system, the sinteringtime of a magnetic core product is shortened, the sintering capacity of a kiln is improved, energy is saved, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of magnetic material sintering furnaces, in particular to a preheating system for magnetic material sintering furnaces. Background technique [0002] The sintering furnace is a kind of ceramic green body solid particles bonded to each other at high temperature, the grains grow, the voids (pores) and grain boundaries gradually decrease, the total volume shrinks and the density increases through the transfer of substances, and finally A furnace that becomes a dense polycrystalline sintered body with a certain microstructure refers to a special equipment that enables the powder compact to obtain the required physical and mechanical properties and microstructure through sintering. The inner area of ​​the sintering furnace is artificially divided into an inner rail area near the sintering center with a higher temperature and an outer rail area far away from the sintering center with a lower temperature. [0003] In the pr...

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Problems solved by technology

[0003] In the production process of magnetic materials, especially soft magnetic manganese zinc ferrite cores must be sintered to form products, usually using a single-plate or double-plate tunnel kiln for sintering, and the magnetic core products need to be heated during the sintering process to drain water, deglue, High-temperature sintering (1300°C-1400°C), heat preservation, cooling and other processes. In order to speed up the cooling rate in the kiln cooling process, the temperature must be lowered through external conditions. Air cooling and water cooling are usually used to bring the surface temperature of the magnetic core to normal temperature. During the air cooling process of the magnetic core, a large amount of hot air is drawn out by the cooling fan, which wastes heat energy resources.

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