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Radiation protection cement and sulphuric acid production method

A production method and radiation protection technology, applied in the direction of sulfur trioxide/sulfuric acid, etc., can solve the problem of unrealized industrial production, and achieve the unique effect of the batching scheme

Inactive Publication Date: 2009-01-28
湖南石门特种水泥有限公司
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Problems solved by technology

[0003] Barium cement is a kind of cement with anti-radiation properties. It is used to prepare anti-radiation concrete for nuclear power plant projects. Due to its production technology, production costs and other factors, industrial production has not been realized in China at present.

Method used

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  • Radiation protection cement and sulphuric acid production method
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  • Radiation protection cement and sulphuric acid production method

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Embodiment Construction

[0020] 1. This method adopts five-stage cyclone preheating technology and "two conversion and two absorption" pickling acid production technology, using desulfurized gypsum, barite, etc. as raw materials to produce barium cement and industrial sulfuric acid with anti-radiation properties. See the process figure 1 , Figure 2 and image 3 , The description is as follows:

[0021] 1. Dry the flue gas desulfurization gypsum to remove all free water and part of the crystal water in the desulfurization gypsum to produce hemihydrate gypsum with a moisture content of 6-9%;

[0022] 2. The anhydrite is crushed by a crusher and then enters the storage warehouse. After crushing, the mass fraction of the anhydrite 20mm sieve is 10-20%;

[0023] 3. After measuring desulfurized gypsum, anhydrite, barite, siliceous raw materials, and anthracite, enter the raw meal mill to prepare raw meal, and enter the raw meal storage warehouse. In the dry state, the mass percentage of each material in the raw...

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Abstract

The invention discloses a production method of radiation-proof cement and sulfuric acid. The invention provides a kiln gas with the concentration of sulfur dioxide gas being 7.0-11.0% and a barium cement clinker by preheating, decomposing and calcining the main raw materials such as desulfurized gypsum, anhydrite and barite by adopting a five-stage cyclone preheating technology and a 'two-transformation and two-absorption' pickling and acid making technology. By adopting the 'two-transformation and two-absorption' pickling and acid making technology, the sulfur dioxide gas is made into industrial sulfuric acid with the mass fraction being 92.5% and 98.0% respectively; the obtained barium cement clinker is cooled by a cooling machine, and then sent to a cement grinding mill together with 2.0-4.5% of the gypsum to produce the barium cement with anti-radiation performance. The production method has the advantages that the raw material proportion is unique, which facilitates the production of the sulfuric acid; the waste resources of the desulfurized gypsum, fly ash, stone coal, and the like, are fully used without secondary pollution; the utility value of the barite resource is fully brought into play; and the five-stage cyclone preheating technology results in low energy consumption and high benefits.

Description

Technical field [0001] The present invention belongs to a production method of anti-radiation cement, namely barium cement and industrial sulfuric acid, and specifically refers to the use of five-stage cyclone preheater kiln process and "two conversion and two absorption" pickling acid production process to desulfurize gypsum, anhydrite, A method for producing barium cement with anti-radiation properties and industrial sulfuric acid with barite as the main raw material. Background technique [0002] The research on gypsum production of sulfuric acid and cement technology began in the early 20th century. In 1916, Germany's Müller and Quona developed natural gypsum production of sulfuric acid and cement technology. Later, Britain, France, Poland and other countries successively established the production of sulfuric acid and cement using natural gypsum, anhydrite and phosphogypsum as raw materials, and put them into production. Due to low productivity, backward technology, high ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/26C04B7/24C04B7/38C01B17/69
CPCC04B11/264
Inventor 徐合林侯益红覃爱平邓建华刘冬生唐远财覃业明
Owner 湖南石门特种水泥有限公司
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