Energy-saving type split double-layer roller way electrical kiln for permanent magnetic ferrite sintering

Abstract

The invention relates to an energy-saving type split double-layer roller way electrical kiln for permanent magnetic ferrite sintering. The energy-saving type split double-layer roller way electrical kiln comprises a kiln body which is divided into two layers including the upper kiln body layer and the lower kiln body layer; a preheating drying section and a temperature rise section are arranged in the upper kiln body layer, and a temperature rise section, a constant temperature section and a cooling section are arranged in the lower kiln body layer; the transmission directions of roller bars in the upper kiln body layer and the lower kiln body layer are vertical opposite transmission directions; a double-layer roller way kiln pipe system comprises an upper-layer dehumidifying pipe, a lower-layer dehumidifying pipe and a kiln tail air drafting cooling pipe; the upper-layer dehumidifying pipe and the lower-layer dehumidifying pipe are used for directly pumping out water steam generated when a ferrite blank is dried from a hearth; the kiln tail air drafting cooling pipe is used for conducting cooling and air drafting on a cooling section; and hot air pumped out from the kiln tail is guided and adjusted to the preheating drying section to be repeatedly used or guided into a natural cooling zone of the cooling section to form a hot air curtain. The energy-saving type split double-layer roller way electrical kiln has the beneficial effects of being simple and compact in structure, being capable of optimizing the overall structural layout, being capable of improving yield and reducing the production energy consumption and the like.

Description

technical field [0001] The invention mainly relates to the field of industrial kilns, in particular to an energy-saving split-type double-layer electric kiln for sintering permanent magnet ferrite. Background technique [0002] In 2003, the 48th Research Institute of CETC successfully developed the first 45-meter double-push roller kiln for magnetic material sintering. Since the birth of the first 45-meter permanent magnet roller kiln in China, the permanent magnet ferrite roller kiln technology researched by domestic equipment suppliers has basically tended to be stable. The length of the furnace body is generally between 36 and 48 meters. The number of sintering push plates has developed from double push plates to three push plates and then to double large push plates. On this basis, the current stable permanent magnet ferrite sintered product in the market is a 45-meter double-large push plate roller table electric kiln, with a maximum production capacity of about 10 ton...

AI Technical Summary

Problems solved by technology

This is because the existing permanent magnet sintering equipment requires the kiln billet to be as dry as possible, otherwise there will be cracking during the sintering process and the output will be affected

[0005] 2. The existing permanent magnet ferrite material sintering kiln market is basically a 45-meter roller kiln, and the production capacity of this type of kiln has almost reached the extreme

It is quite difficult to increase production capacity on this basis

This is because considering the space efficiency of the equipment and the unit energy consumption of the product, it is not possible to rely on a single elongated kiln length for capacity expansion

[0006] 3. Through the efforts of kiln technicians, the energy consumption index of the existing 45-meter roller kiln has almost reached the lowest level, and it is impossible to obtain better energy-saving effects from the optimization of the refractory materials of the furnace body and the existing structure

In addition, there are many attempts at home and abroad to utilize the waste heat of the existing permanent magnet roller kiln, but they all fail.

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