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1. Low power/fuel comsuption, 2. Clean combustion, 3. Automatical control, 4. Excellent and stable quality, 5. Simple structure - details see: https://www.machineto.com/energy-saving-gypsum-powder-production-line-10086680

Brief Introduction of By-product Gypsum Calcinations Equipment

(Direct thermal industrial by-product gypsum calcinations equipment)

The industrial by-product gypsum is a general term of the calcium sulfate as the main component of the by-products generated in the discharge of industrial production, also known as chemical gypsum, chemical gypsum, synthetic gypsum, such as phosphogypsum, desulfurization gypsum, citric acid gypsum, gypsum and so on. Direct thermal industrial by-product gypsum calcinations process researched by us is that dry and calcinations of by-product gypsum are completed within the same equipment on the one time. The semi-water gypsum content in product can reach to 80%~90%. But the traditional process such as two steps process, the first removal surface water in the drying equipment, then turn out to calcinations equipment for burning off part of crystal water. After being dried and calcined, the qualified plaster powder can be used for the production of gypsum board, cement retarder, gypsum dry mixed mortar and ceramic materials, gypsum whisker and gypsum fiber etc.

Compare to natural gypsum, industrial by-product gypsum has several characteristics as follow: 1. Uniformity quality; 2.High moisture; 3. Difficult to remove impurities. It is difficult to use cause by the unstable quality. During two decades, our country has reached the world's first industrial by-product gypsum emissions, which was about 100 million tons per year. Therefore,using the industrial by-product gypsum, can make the waste into renewable resources and control of environmental pollution and realize sustainable development, and can save valuable natural gypsum resource, has the very vital significance.

Huangshi Energy Saving Equipment in Building Material Factoryhas been successes develop a series of ‘direct thermal industrial by-product gypsum calcinations’. It’s comprised of feed materials system, heating supply system, calcinations system, dust collection system and automatic control system.

The series of equipment is consisted of more than 20 self-owned intellectual property patented technology; the heat source is GXDF type high temperature flue gas fluidized bed by self-owned intellectual property and rights of national torch plan project; the furnace has energy-saving efficient clean combustion characteristic. The complete sets of equipment set drying technology, screen, calcinations, powder grinding, modified into a kiln whole, through sizing device in the kiln can effectively remove sundries, desulfurization gypsum or phosphogypsum after dried can be sent by duct into the gas-solid separation system, after cooling and homogenizing, then to storage, bags packing or in bulk production.

This set of equipment technological process is simple and low energy consumption, stable operation and stable quality, reasonable process parameters control, semi-water gypsum content in dry product after calcinations was up to 80 ~ 90%. Industrial by-product gypsum kiln has been used in Liaoning, Shandong, Henan, Sichuan, Hubei, Guizhou, Guangdong, Zhejiang and other places more than 40 enterprises are widely used, won widespread praise.

In 2010 by the national development and reform commission and the state of environmental protection in the latest release of "the state encourages the development of environmental protection equipment (products) directory (2010 version)" (no. 6, 127 recommended products), the set of process equipment is the only country to be included in the announcement of the industrial by-product gypsum calcimine equipment; By the scientific and technological achievements appraisal for 2012 - the international advanced level.

Performance feature

The direct heat type gypsum calcinations equipment researched by Huangshi Energy Saving Equipment in Building Material Factory has the features of simple process control program, simple and compact structure, moisture and temperature can automatic control and monitor online, high heat exchange efficiency, energy consumption has reached at the world advanced level, easy operation and maintain, low invest and operation cost, high quality stable output product. Plaster setting time and strength can be adjusted according to requirement of users, reach at environmental protection standards.

Technical Performance

When the CaSO4.2H₂O content in raw material is greater than 75%, and be in accordance with using requirements of GB/T9776-2008, the indicators of products can achieve to high-quality level.

Product size: 5-50 million tons / year.

Production area: 400-1000m²

Design criteria:

1)Free water W1=10%, Combined water W2=16-20% (when free water in the actual production W1=5-25%, it also can be calcined);

2)Power consumption: ≤ 16 kwh / ton plaster powder;

Coal consumption: ≤ 46 kg of standard coal / ton plaster powder;

Coal burnout ratio ≥ 99%;

Heat efficiency: ≥95%.

Exhaust waste heat can be utilized.

Dust emission concentration ≤ 50mg/m³, environmental protection can achieve the national standard.

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