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Gypsum calcining method

A gypsum and calcination technology, which is applied in the field of gypsum production, can solve problems such as corrosion of pipes and supports, impact on service life of equipment, corrosion of dust collectors and other equipment, and achieve the effect of reducing corrosion and speeding up drying

Active Publication Date: 2021-07-23
CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, since the desulfurization gypsum raw material contains a certain amount of free water and Cl - , SO4 2- Plasma, which corrodes pipes and supports more seriously, directly affects the service life of equipment
At the same time, due to the high humidity in the rotary kiln, it will cause serious corrosion of subsequent dust collectors and other equipment

Method used

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  • Gypsum calcining method

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Embodiment Construction

[0018] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0019] In the calcination process of gypsum, with the improvement of environmental protection requirements, there are fewer and fewer coal-fired furnaces, and natural gas is used as the heat source, which costs more. Therefore, the steam calcination process is increasingly widespread. Since the desulfurization gypsum raw material contains a certain amount of free water and Cl - , SO4 2- Plasma, the corrosion of pipes and brackets is relatively serious in the equipment feeding section; at the same time, due to the high humidity in the upper atmosphere of the rotary kiln, subsequent dust co...

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Abstract

The invention discloses a gypsum calcining method. A gypsum calcining system is used in the method. The gypsum calcining system comprises a feeding device, a gypsum calcining device, a fluidized-bed furnace cooler and a grinding device which are connected in sequence, wherein the gypsum calcining device comprises a rotary kiln and a double-screw feeder arranged at the front end of the rotary kiln, the front end of the double-screw feeder is connected with a feeding device for conveying gypsum raw materials, and a material returning opening is formed in the rotary kiln and connected with the front end of the double-screw feeder through a circulating conveying device. The gypsum calcining method comprises the following steps: the feeding device feeds the gypsum raw materials into the rotary kiln through the double-screw feeder for drying and calcining; middle returned materials in the rotary kiln enter the front end of the double-screw feeder through the material returning opening and the circulating conveying device; gypsum powder calcined in the rotary kiln is fed into a fluidized-bed furnace cooler for cooling; and the cooled gypsum powder is fed into the grinding device for grinding.

Description

technical field [0001] This application relates to but not limited to the field of gypsum production, especially a gypsum calcining method. Background technique [0002] In the calcination process of gypsum, the drying and calcination of materials in the rotary kiln are completed in the same equipment, and the process is simple and compact. However, since the desulfurization gypsum raw material contains a certain amount of free water and Cl - , SO4 2- Plasma will seriously corrode the pipes and supports, which will directly affect the service life of the equipment. At the same time, due to the high humidity in the rotary kiln, it will cause serious corrosion of subsequent dust collectors and other equipment. Contents of the invention [0003] The embodiment of the present application provides a gypsum calcination method, which can reduce corrosion to equipment such as a rotary kiln during the gypsum calcination process. [0004] The embodiment of the present applicatio...

Claims

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Application Information

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IPC IPC(8): C04B11/028
CPCC04B11/0285C04B11/028
Inventor 王兵杨正波侯志刚张羽飞任有欢
Owner CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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