Stepwise grog burning furnace

Abstract

The present invention relates to a clinker sintering clinker, including a vertical cylinder. Said vertical cylinder includes an external cylinder; an inner liner; two or more staggering mutually fishback pans which are mounted in the inner cavity of the outer cylinder, tightly abuts on the silo and approaches the bottom, with a distance therebetween; and more than two staggering mutually combustion nozzles or other heat source entrances mounted between the fishback pans. Said furnace stove utilizes a countercurrent mode between the falling materials and the ascending air and the heat source, takes full advantage of the possesses high thermal efficiency due to the hot gas and the clinker residual heat after a sintering, and utilizes to facilitate free fall from top to bottom or rolling of the sintered materials. Then the contact between the materials and gas are increased, the heat exchange rate is improved, and the production is increased; at the same time, the sintering quality and the homogeneity thereof of the clinker are ensured, and the material is not easy to block. Said furnace stove has a simple structure and few auxiliary equipments, has a small volume and low first cost, is convenient to examine and repair.

Description

technical field [0001] The invention relates to a sintering furnace, in particular to a step type shaft kiln clinker sintering furnace. Background technique [0002] Sintering furnaces for cement clinker, alumina, refractory materials, pellets, lime and other materials generally include rotary kilns, shaft kilns, tunnel kilns, chain row kilns and fluidized fluidized furnaces. The kiln similar to this application is a shaft kiln, which generally includes a chimney and a feeding hole on the top of the furnace, and a straight cylinder below, generally a cylinder, with burners distributed in the middle of the height of the cylinder, and a discharge mechanism at the bottom of the furnace. The advantage of this furnace is that its thermal efficiency is very high. The material to be sintered is preheated by the flue gas from top to bottom and is gradually sintered near the burner; the air rises from the bottom of the furnace and is heated by the waste heat of clinker near the burne...

AI Technical Summary

Problems solved by technology

But the furnace also has the most fatal flaw

Since the inner cavity of the vertical cylinder of this kind of furnace is a circular cavity, after the sintering material is added, a cylindrical material column is formed. During sintering, the sintering degree of the cylindrical material column is uneven from the outer surface to the inner core. The quality of the finished material is extremely unstable, extremely uneven, often some unqualified materials, and the output is small

[0003] In order to improve the above-mentioned defects, a cylinder made of refractory material has been added to the center of the circular cavity, which can improve the airflow movement in the center of the material column to a certain extent, thereby improving the sintering quality and the output per hour. However, due to the inner cylinder The material column between the outer wall and the inner wall of the outer cylinder will also cause poor sintering quality, uneven quality and low output due to poor airflow.

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