Hot airflow suspension calcining method and apparatus for nano oxide powder

A nano-oxide and nano-scale oxide technology, applied in the field of nano-materials, can solve the problems of affecting the main component content of the product, serious sintering of nanoparticles, and reduced powder activity, and achieve improved heat source and hot air flow, uniform particle size, The effect of low production cost

CN1233977CInactive Publication Date: 2005-12-28骆天荣
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2005-12-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a calcining method and calcining equipment for nano oxide powder in a hot gas flow suspension state, belonging to the technical field of nanometer materials. The calcination method is to decompose the various organic and inorganic salts that need to be calcined and decomposed into dried nano-scale intermediate powders in the calcination equipment, carried by heated airflow, and decomposed by calcination in a suspended state to form nano-powder products of oxides . The calcination equipment is composed of a heat source device, an airflow purification device, a feeding device, a multi-stage calcination device, a cooling device, a powder collection device, and an air induction device. The nano-oxide product obtained by the calcination method and calcination equipment has uniform particle size and high activity, and is a calcination method and calcination equipment suitable for large-scale industrial production of nano-oxide materials.
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Description

1. Technical field

[0001] The calcining method and calcining equipment of the nano oxide powder in the hot air flow suspension state of the present invention belong to the technical field of nanomaterials, and it relates to the nano intermediate powder products of various organic and inorganic salts that need to be calcined, which are passed through the hot air flow. Carried in a suspended state for calcination and decomposition to produce and prepare oxide nanopowder products. 2. Background technology

[0002] Oxide nanopowders are an important field of inorganic nanomaterials, and are widely used in the national economy. During the production process of such materials, a calcination process is required to decompose the intermediate salts into oxides. Traditional methods and equipment for calcination of micron oxide products generally include: tunnel kiln calcination method and equipment, drum calcination method and equipment. These methods and equipment are used for calc...

Examples

Embodiment 1

[0012] Example 1 Calcination method and calcination equipment of nano-oxide powder in hot air suspension state

[0013] 1. Nano-oxide powder hot air suspension calcining equipment

[0014] The composition of the calcining equipment system used in the nano-oxide powder hot gas suspension calcining method described in the example one-1 is as follows: figure 1 The block diagram shows. As shown in the figure, the calcination equipment includes: airflow purification device 1, heat source device 2, feeding device 3, calcination device 4, cooling device 5, powder collection device 6, air induction device 7, silo 8, and can also be equipped with There are their multi-functional control parts, and the supporting connections form the calcining equipment system. The specific structure of this set of calcination equipment system consists of figure 2It is shown that the hot air purification device described in the figure is composed of two devices 9 and 11 for dust filtering, impurity ...

Embodiment 2

[0018] Example 2 Calcination method and calcination equipment of nano-oxide powder in hot air suspension state

[0019] 1. Nano-oxide powder hot air suspension calcining equipment

[0020] The calcining equipment system of the 1 of the example two is different from that described in the 1 of the example one: 1. The calcining device can be composed of figure 2 18, 20, etc., a total of 3, or a total of 4, or a total of 5 connections to form a calcination device with an ultra-long calcination section or channel, and the newly added device is installed between devices 18-20; 2. In this example The calcining equipment system may not be provided with a multi-functional automatic control electronic system, which can be operated manually or manually; 3. The high-temperature hot blast stove 10 is used as the main heat source, and the electric heater 15 is used as a supplementary heating source. The rest not described are all the same as those described in Example 1-1, and will not be...

Embodiment 3

[0023] Example 3 Calcination method and calcination equipment of nanometer oxide powder hot air suspension state

[0024] 1. Nano-oxide powder hot air suspension calcining equipment

[0025] The calcining equipment system of the 1 of the example three is different from that described in the 1 of the example one and the example two: 1. the calcining device can be composed of figure 2 18, 20, etc., a total of 7, or a total of 8 connections constitute a calcination device with an ultra-long calcination interval or channel; 2. The calcination equipment system in this example can also be intelligently controlled by a computer to realize online automatic control, which can be controlled by Design and implementation of known electronic technology and computer application technology; 3. Use high-temperature hot blast stove 10 as heat source. The rest not described are the same as those described in Example 1 and Example 2-1, and will not be repeated.

[0026] 2. Calcination method ...