Method for vibrating, fluidizing and decomposing phosphogypsum

A phosphogypsum and fluidization technology, which is applied in chemical instruments and methods, inorganic chemistry, sulfur compounds, etc., can solve the problems of material sintering and affecting production continuity, so as to prevent agglomeration and facilitate the reduction of sulfuric acid production cost. The effect of reducing production costs
CN101891407AInactive Publication Date: 2010-11-24WUHAN INSTITUTE OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUHAN INSTITUTE OF TECHNOLOGY
Publication Date
2010-11-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for vibrating, fluidizing and decomposing phosphogypsum. The method is characterized by comprising the following steps of: 1) pretreating the phosphogypsum; 2) preparing a composite additive; 3) uniformly mixing the composite additive and the phosphogypsum in a mass ratio of 1:7 to prepare a mixture; 4) preparing equipment; 5) reducing and decomposing, namely feeding the mixture into a uniform fluidizing decomposing furnace out of a kiln; heating to the temperature of between 850 DEG and 1,100 DEG C under the protection of Ar atmosphere; introducing CO at theflow rate of 5 to 50mL / min; making the volume flow ratio of the CO to the Ar to be 1:2-19; controlling the temperature to be between 850 and 1,100 DEG C; and starting a vibration energy loading device. The method has the characteristics of not easily agglomerated materials, high fluidizing quality, low fluidizing gas velocity, high SO2 concentration in tail gas, low dust content, low process energy consumption, contribution to industrial large-scale conduction production, and capability of reducing sulfuric acid production cost.
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Description

technical field

[0001] The invention relates to a method for vibrating fluidized decomposition of phosphogypsum, which belongs to the technical field of environmental protection and chemical production. Background technique

[0002] Phosphogypsum is the solid waste generated during the production process of wet-process phosphoric acid. At present, phosphogypsum is mainly discarded by stacking in the open air. The large stockpiling of phosphogypsum not only encroached on land resources, but also easily caused air, soil and water pollution due to wind and rain erosion. At the same time, phosphogypsum is also a valuable sulfur resource that can be used to produce sulfuric acid. According to reports, my country's phosphogypsum discharge in 2007 was about 50 million tons, and with the increase in the production of high-concentration phosphorus compound fertilizers, the discharge of phosphogypsum gradually increased. The cumulative stock of phosphogypsum in my country has exceede...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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