Cooling and drying synchronizing method for rotary hearth furnace

Abstract

The invention relates to a cooling and drying synchronizing method for a rotary hearth furnace. The method specifically includes the following steps that firstly, red pellets of the rotary hearth furnace uniformly fall on a lower-layer chain plate at a feeding end A2 through a first guiding chute, and meanwhile green pellets of the rotary hearth furnace uniformly fall on an upper-layer chain plate at a feeding end B1 through a first distributor; secondly, it is guaranteed that the rotation direction of the upper-layer chain plate and the rotation direction of the lower-layer chain plate are opposite by adjusting the rotating speed of both the upper-layer chain plate and lower-layer chain plate; thirdly, cold air ascends and penetrates through the red pellets on the lower-layer chain plate so as to cool the red pellets, and meanwhile the temperature of the cold air increases, so that the cold air is changed into pre-heated air; fourthly, the pre-heated air continues to ascend and penetrates through the green pellets on the upper-layer chain plate so as to dry and pre-heat the green pellets, and meanwhile the temperature of the pre-heated air decreases, so that the pre-heated air is changed into hot air containing certain heat; and finally, the hot air is pumped out, enters a dust falling room, then enters a dust removing room from the dust falling room and is transferred into an air pre-heating system in the rotary hearth furnace through the dust removing room for use.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment, in particular to a method for synchronizing cooling and drying in a rotary hearth furnace. Background technique [0002] In the rotary hearth furnace production process, it is necessary to dry the green balls containing a certain amount of moisture, and also need to cool the red balls whose initial temperature is about 900-1200 °C. At present, the drying of green balls and the cooling of red balls are processed separately, that is, different equipment and different processes are used for processing, resulting in a large area, a lot of equipment and corresponding auxiliary facilities, low utilization rate of sensible heat of red balls, and even The sensible heat of the red ball is completely wasted. This not only fails to realize the efficient recovery of red ball sensible heat, but also increases the construction and operation costs of the rotary hearth furnace. Contents of the in...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the raw ball and the red ball are dried and cooled separately in the existing rotary hearth furnace, and the problems of large area occupation, many equipment and corresponding auxiliary facilities, and low utilization rate of red ball sensible heat are solved. , the invention provides a method for synchronous cooling and drying in a rotary hearth furnace

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