Shuttle Kiln for Firing Ceramic Porous Body

A technology of porous body and shuttle kiln, which is applied in the field of shuttle kiln, can solve the problems such as inability to guarantee the oxygen concentration, achieve the effects of shortening the firing time, preventing uneven temperature distribution, and reducing temperature difference

Active Publication Date: 2016-01-20
NGK INSULATORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the oxygen concentration of the combustion gas generated by the afterburner is only reduced to about 10%, and even if these combustion gases are returned to the furnace, the oxygen concentration in the furnace cannot be guaranteed to be low enough

Method used

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  • Shuttle Kiln for Firing Ceramic Porous Body
  • Shuttle Kiln for Firing Ceramic Porous Body
  • Shuttle Kiln for Firing Ceramic Porous Body

Examples

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Embodiment Construction

[0031] Preferred embodiments of the present invention will be described below. In this embodiment, the object to be fired is a ceramic honeycomb structure containing an organic binder ceramic porous body. The unfired ceramic porous body is loaded into the furnace by the kiln car, the organic binder is evaporated at about 200°C, and then the temperature is raised to about 1500°C for firing.

[0032] figure 1 Among them, 1 is the furnace body of the shuttle kiln. figure 1 In order to simplify the drawings, it is shown that there are three kiln cars 20 in the furnace. In fact, the furnace body 1 can extend to the left and right of the drawing, open the entrance door 21, and load multiple kiln cars into the furnace 1 for firing. . A gas flow path 2 is formed on the bottom surface of each kiln car 20 . In addition, a gas suction path 4 including a gas suction port 3 is provided at a position corresponding to the gas flow path 2 at the bottom of the kiln car. As mentioned above...

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Abstract

The invention provides a shuttle kiln for firing ceramic porous bodies containing an organic binder, which will not be damaged due to the temperature difference inside and outside the furnace, and can be fired in a shorter time than the prior art. The shuttle kiln of the present invention is suitable for firing ceramic porous bodies containing organic binders. The shuttle kiln is equipped with a gas suction path (4) for sucking out the gas in the furnace and exhausting it through the afterburner (5), and a gas suction path (4) for sucking out the gas in the furnace to burn the organic binder outside the furnace, and then returning it to the furnace. Cycle path (7).

Description

technical field [0001] The invention relates to a shuttle kiln for firing ceramic porous bodies containing organic binders, in particular to a shuttle kiln suitable for firing ceramic honeycomb structures. Background technique [0002] As furnaces capable of mass-producing fired ceramic porous bodies, continuous furnaces represented by tunnel kilns and roller kilns, and batch furnaces represented by shuttle kilns have been widely used. The shuttle kiln is a batch-type firing furnace in which the porous body is carried into the furnace by a kiln car. Because the kiln car moves back and forth between the inside and outside of the furnace, it is called a shuttle kiln. [0003] When the ceramic porous body containing the organic binder is fired in a shuttle kiln, a large amount of organic binder vapor is generated from the unfired ceramic porous body at the initial stage of temperature rise. At this time, in order to ensure safety, it is necessary to control the concentration o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00C04B35/638F27B17/00
CPCC04B35/638C04B35/64C04B2235/6562C04B2235/6565C04B2235/6584C04B2235/6586F27B17/0041F27D7/06C04B33/32C04B38/0006C04B38/06
Inventor 宫田丈太郎井原尔史安江孝
Owner NGK INSULATORS LTD
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