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Ceramic calcined method under controllable reducing atomosphere of shuttle kiln

A technology of shuttle kiln and ceramics, which is applied in the field of controlled atmosphere firing ceramics in shuttle kiln, which can solve the problems of inability to guarantee reducing atmosphere and insufficient reducing atmosphere, and achieve the effects of avoiding high temperature oxidation, low cost and reducing pollution

Inactive Publication Date: 2006-09-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the shuttle kiln, it is easier to oxidize during the high-temperature heat preservation stage in operation. The reason is that the amount of fuel injected into the kiln is generally not much during the high-temperature heat preservation stage. As long as the temperature is kept constant, sufficient reduction cannot be guaranteed. atmosphere, so even the tiles that have been reduced in the early stage will undergo secondary oxidation due to insufficient reducing atmosphere

Method used

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  • Ceramic calcined method under controllable reducing atomosphere of shuttle kiln

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Embodiment 1

[0011] Such as figure 1 As shown, the celadon body is fired in the shuttle kiln. The steps include heating up, drying, firing, heat preservation, cooling, and exiting the kiln. When the temperature is kept at 500°C for 60 minutes, the 3 fire suction ports below the shuttle kiln 1 A stainless steel circular open container 2 filled with 1.5 liters of water is placed, and the open area of ​​the open container 2 can completely cover the vertical projected area of ​​the fire suction port 3.

Embodiment 2

[0013] Such as figure 1 As shown, the celadon body is fired in the shuttle kiln. The steps include heating up, drying, firing, heat preservation, cooling, and exiting the kiln. When the temperature is kept at 1400°C for 30 minutes, the 3 fire suction ports below the shuttle kiln 1 An aluminum rectangular open container 2 filled with 2 liters of water is placed, and the open area of ​​the open container 2 can completely cover the vertical projected area of ​​the fire suction port 3.

Embodiment 3

[0015] Such as figure 1 As shown, the celadon body is fired in a shuttle kiln. The steps include heating up, drying, firing, heat preservation, cooling, and exiting the kiln. When the temperature is kept at 1000°C for 45 minutes, the 3 fire suction ports below the shuttle kiln 1 Place the ceramic oval open container 2 that fills 1 liter of water, and the open area of ​​the open container 2 can completely cover the vertical projected area of ​​the fire suction port 3.

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Abstract

This invention provides a method for controllable ceramics oxidative sintering in shuttle kilns, which includes the steps of temperature raising, drying, sintering, temperature holding, cooling and products can be taken out of the shuttle kiln after the procedure mentioned above. When temperature in shuttle kilns is 500~1400 deg. C and a 30~60-minute temperature holding is being carried out, a water-containing open vessel is placed at the fire absorber down the shuttle kiln, and the area of the open vessel should be not smaller than the vertical projection area of the fire absorber. By this method, high-temperature oxidation can be well avoided and product quality can be greatly promoted. Besides, fuels can be saved, pollution can be reduced and this method has the advantage of easy operation.

Description

technical field [0001] The invention relates to a technique for firing ceramics with a controlled atmosphere in a shuttle kiln, in particular to a method for firing ceramics with a controlled reducing atmosphere in a shuttle kiln. Background technique [0002] As an intermittent kiln, the shuttle kiln has the advantages of less land occupation, less one-time investment, and flexible production, so it is favored by the majority of small and medium-sized ceramic enterprises. When firing ceramic products, in order to achieve the required product quality or appearance requirements, it is often necessary to control the different atmospheres in the kiln at different temperature stages of firing products. The atmosphere in the kiln is divided into three types, namely oxidizing atmosphere, reducing atmosphere and neutral atmosphere. The fuel injected into the kiln undergoes an oxidation reaction with the air injected into the kiln at a certain temperature. ...

Claims

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Application Information

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IPC IPC(8): C04B35/64
Inventor 张海文曾令可罗民华王慧刘平安方海鑫程小苏税安泽
Owner SOUTH CHINA UNIV OF TECH