Pre-burning kiln for high-efficiency energy-saving high-technology ceramic material synthesis

Abstract

The invention relates to a high-efficiency energy-saving high-technology ceramic material synthesis pre-burning kiln, which is characterized in that: the high-efficiency energy-saving high-technology ceramic material synthesis pre-burning kiln is composed of a kiln body made of fireproofing material, a run-through fireproofing material pipe passage arranged in the kiln body and an electrical heating body, the electrical heating body is arranged between the kiln body and the fireproofing material pipe passage; in the invention, compared with the existing tunnel kiln and the continuous pushed slab kiln, the high-efficiency energy-saving high-technology ceramic material synthesis pre-burning kiln has simple structure without a sagger, a pushing plate and a guide rail; in addition, the high-technology ceramic material pre-burning powder is completely placed in the fireproofing material pipe, the heating space is compact, the heat dissipation area is greatly reduced and the heat energy efficiency is greatly improved; the placement angle of the high-efficiency energy-saving high-technology ceramic material synthesis pre-burning kiln can be adjusted and the kiln can be placed horizontally or obliquely, the inclined angle is convenient for leading the high-technology ceramic material to flow and convey in the fireproofing material pipe, so as to realize that when the high-technology ceramic material is cooled, the emitted waste heat flows back upwards along the fireproofing material pipe, so as to improve the utilization rate of heat energy.

Description

technical field [0001] The invention relates to a synthetic pre-fired kiln, and specifically provides a synthetic pre-fired kiln for high-efficiency, energy-saving, high-tech ceramic materials and other inorganic materials. Background technique [0002] At present, most high-tech ceramics and many inorganic materials, such as PTC, NTC, zinc oxide varistor ceramics, dielectric ceramics, capacitor ceramics, microwave dielectric ceramics and ferrite magnetic materials, as well as mullite ceramics and cordierite ceramic materials Production involves pre-firing synthesis process. Usually, the powder of ceramics or other inorganic materials to be synthesized is packed in a sagger and placed in a continuous tunnel kiln (push plate kiln or roller kiln) or a batch kiln. Pre-fire between 1500 and 1500 degrees for 1-5 hours. The advantage of the batch kiln is that it is relatively mobile, but it is not conducive to large-scale production. In addition, because there is usually a large...

AI Technical Summary

Problems solved by technology

[0004] 1. Because the sagger and push plate loaded with powder must go through the process of low-temperature preheating, high-temperature heating and cooling together with the powder, it also consumes a lot of energy

The usual saggers and push plates are made of refractory alumina, mullite or silicon carbide refractory materials, which have a large heat capacity and generally consume more energy than the powder itself, up to 70%. Partial energy consumption is completely ineffective

[0005] 2. There is a large amount of unusable ineffective space between the push plate, track, sagger and inner wall of the kiln, and the kiln head and kiln tail are open structures, resulting in a great waste of heat energy

In addition, the huge friction between the push plate and the track will not only wear the push plate, but also may cause pollution

[0007] 4. The length of the kiln body of the pre-fired kiln is generally short, and the sagger and push plate are prone to cracking and damage due to the rapid cooling and rapid heating process of low temperature preheating, high temperature heating and cooling

The cost of saggar and push plate accounts for a high proportion of the cost of pre-firing process

[0008] 5. The horizontal placement of the kiln body cannot control the airflow direction in the kiln body, and it is difficult to make the waste heat return and utilize

If it is necessary to guide the airflow to flow in reverse to the kiln head, auxiliary devices must be added, which increases the cost

[0009] 6. Considering the production efficiency and cost factors, the pre-fired saggers are usually relatively large, which more or less causes the difference in the heating state of the powder in the sagger during pre-fired, resulting in the difference in the degree of pre-fired. all

Images