A double-layer roller kiln with staggered temperature zones

Abstract

The invention discloses a double-layer roller kiln with warm areas distributed in stagger. The double-layer roller kiln comprises a kiln body, and the kiln body is divided into an upper-layer kiln way and a lower-layer kiln way through a middle heat insulating layer; an upper-layer roller table is arranged on the upper-layer kiln way, an upper-layer roller rod is arranged on the upper-layer roller table, a lower-layer roller table is arranged on the lower-layer kiln way, and a lower-layer roller rod is arranged on the lower-layer roller table; and the rotating directions of the upper-layer roller rod and the lower-layer roller rod are opposite, complete sintering process zones are arranged on the upper-layer kiln way and the lower-layer kiln way, and ferrite products in different batches are sintered. The double-layer roller kiln has the beneficial effects of being simple and compact in structure, increasing efficiency, increasing the yield, saving energy consumption and the like.

Description

technical field [0001] The invention mainly relates to the field of roller hearth kilns, in particular to a double-layer roller hearth kiln in which temperature zones are arranged alternately. Background technique [0002] Roller kiln is a new type of rapid continuous industrial firing kiln, which has the advantages of high degree of automation, low labor intensity and convenient operation. The roller kiln uses rotating rollers as the body carrier, and the products to be fired are placed on many horizontal refractory rollers with close intervals, and the fired products are transferred from the kiln head to the kiln tail by the rotation of the rollers. Roller kilns are widely used in the rapid firing of ceramic materials, magnetic materials, electrode materials, chemical powders and other products. [0003] At present, the roller kilns on the market are mainly single-layer roller kilns, which are divided into electric heating and gas heating, both of which have relatively ma...

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Problems solved by technology

This is because during the sintering process of ferrite materials, the heating curve needs to be strictly controlled, preheating and drying are required before heating, and the cooling speed should not be too fast during the cooling process, so the furnace body is longer

[0007] (2) The roller kiln requires high precision for the transmission of the sagger or setter, but the existing double-layer roller kiln is generally equipped with a lifting platform, which is difficult to control, and it is difficult to keep the sagger or setter flat when it comes out of the furnace orderly

This is because the roller rod transmission of the roller kiln requires particularly high transmission precision for the transmission of the sagger or the setter plate. The existing double-layer roller kiln is generally equipped with a lifting table because the material needs to be sintered in the furnace cycle. For the sagger or The transmission accuracy of the setter plate is affected, and it is difficult to control

[0008] (3) The existing energy-saving roller kiln high-temperature waste heat gas transmission pipeline is too long, wastes materials, is prone to water accumulation, and heat is easily lost during the transmission process

The existing waste heat utilization technology of roller kiln needs to pump the high-temperature gas from the cooling section of the kiln tail to the drying and preheating section of the kiln head for utilization. The water vapor condenses and falls in the pipeline, forming accumulated water and even flowing back into the furnace cavity, which will adversely affect the sintered material

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