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Circulating cooling method and apparatus used for roasting aluminum oxide

A circulating cooling and alumina technology, which is applied in the field of alumina, can solve the problems of water consumption and heat loss, increase the investment of circulating water station projects, etc., and achieve the effects of reducing energy consumption, reducing pollution and water consumption, and facilitating operation and management

Inactive Publication Date: 2014-04-16
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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Problems solved by technology

This mode not only increases the engineering investment for building circulating water stations, but also causes water consumption and natural heat loss

Method used

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  • Circulating cooling method and apparatus used for roasting aluminum oxide

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with accompanying drawing. As shown in the accompanying drawings, the circulating cooling method of roasted alumina of the present invention is to send the qualified condensed water from the evaporation of mother liquor or pressure boiling and dissolution process to the softening water tank 1, and use the softening water pump 3 to pass through the pipeline 2 and the pipeline 4 in the softening water tank. The soft water is pumped to the plate heat exchanger 5 for heat exchange with the low-temperature return water from the red mud stockyard. The demineralized water is sent to the fluidized cooler 7 through the pipeline 6 as cooling water, and conducts indirect heat exchange with the high-temperature discharged alumina. The high-temperature soft water exchanges heat indirectly with the low-temperature return water from the red mud stockpile. The cooled soft water is used to cool high-temperature alumina...

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Abstract

The invention discloses a circulating cooling method, especially relates to a circulating cooling method and an apparatus used for roasting aluminum oxide, and belongs to the field of aluminum oxide technology. The circulating cooling method used for roasting aluminum oxide is characterized in following steps: qualified condensate water obtained via mother liquor evaporation or pressure cooking dissolving is delivered into a soft water tank nearby; soft water in the soft water tank is delivered into a plate heat exchanger using a soft water pump, so as to realized heat exchange with low-temperature backwater delivered from a red mud storage yard; after heat exchange, the heated backwater is used as red mud washing water in a red mud separating and washing process, and the cooled soft water is taken as cooling water, and is delivered into a fluidizing cooler so as to realize indirect heat exchange with high-temperature discharged aluminum oxide; and after indirect heat exchange, the soft water is delivered back into the soft water tank, and is recycled and cooled. Advantages and effects of the circulating cooling method and the apparatus are that: the apparatus is simple in structure, land occupation area is small, operation and management are convenient, construction investment of circulating water stations can be saved, heat energy can be recycled, and energy consumption can be reduced.

Description

Technical field [0001] The invention involves a cooling method.In particular, it involves a circulating cooling method and device for roasting aluminum, which is the field of alumina technology. Background technique [0002] In the production of alumina alumina, aluminum hydroxide is transformed into aluminum oxide through the high temperature roasting furnace of the baked furnace. Due to the high temperature of the cooking furnace discharged aluminum aluminum, it is necessary to cool down and cool down.The scarring of scars in the device affects heat exchange effects. [0003] At present, it is usually constructed to construct low -temperature circulatory water (about 35 ° C) as cold interlaxes. The high temperature aluminum aluminum aluminum is cooled through a darning cooler, and the cooling water (about 55 ° C) after the heat absorbs heat is returned to the circulating waterStand, use the cooling tower to cool down and pump it to a darning cooler for circulating cooling.This ...

Claims

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Application Information

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IPC IPC(8): C01F7/30
CPCY02P20/10
Inventor 陈国华汪漪
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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