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Method and equipment for producing high temperature gypsum from industrial byproduct gypsum

A technology for industrial by-product gypsum and gypsum, applied in the field of high-temperature gypsum, can solve problems such as complex maintenance of process equipment, achieve low investment, high efficiency, and facilitate the promotion and application of industrialization

Pending Publication Date: 2018-09-07
四川方大新型建材科技开发有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It still needs to use a lot of water to wash, produce sewage, and also needs to be filtered, and the maintenance of process equipment is complicated

Method used

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  • Method and equipment for producing high temperature gypsum from industrial byproduct gypsum
  • Method and equipment for producing high temperature gypsum from industrial byproduct gypsum
  • Method and equipment for producing high temperature gypsum from industrial byproduct gypsum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Get 500Kg industrial by-product phosphogypsum, adopt such as figure 1The equipment shown in the figure continuously produces high-temperature gypsum on-line. The gypsum is transported to the box-type feeding seasoning machine 2 for buffering through the loader 1. Machine 5 and belt conveyor 3 are equipped with permanent magnet iron remover 4 to remove iron impurities; the gypsum in the air lock feeder 5 enters the dryer 6, and the controller 61 is set to control the drying temperature to 500°C. The time for removing free water at high temperature is between 3 and 5 seconds. The pulverized and dried gypsum is separated and collected in the dust collector 7, the tail gas is discharged through the fan 8, and the gypsum in the dust collector 7 enters the inner cylinder 91 and the outer cylinder 91. The calcined gypsum in the cylinder 92 is heat-exchanged and further dehydrated. The temperature of the gypsum in the inner cylinder 91 is 100-550°C. The dehydrated gypsum part e...

Embodiment 2

[0100] Take 10Kg of the high-temperature gypsum powder prepared in Example 1 and add activators, admixtures, admixtures, aggregates, etc. to obtain plastering gypsum, and test the obtained plastering gypsum. The test results are shown in Table 2.

[0101] Table 2 Example 2 High-temperature gypsum preparation plastering gypsum performance

[0102]

[0103]

Embodiment 3

[0105] The high-temperature gypsum powder prepared in Example 1 was added to the activator for data testing, and the testing results are shown in Table 3.

[0106] Table 3 Example 3 high temperature gypsum properties

[0107]

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Abstract

The invention relates to method and equipment for producing high temperature gypsum from industrial byproduct gypsum, belonging to the technical field of high temperature gypsum. The method for producing the high temperature gypsum from the industrial byproduct gypsum comprises the following steps: a, smashing and drying the industrial byproduct gypsum, wherein drying temperature is 400-550 DEG C,and removing free water; and b, calcining gypsum in the step a with batch together, thus obtaining the high temperature gypsum, wherein the additive amount of coal meets the standard that calcinations temperature is controlled to be 700-900 DEG C. The method provided by the invention has the advantage that harmful impurities in the industrial byproduct gypsum can be eliminated by drying and calcining the batch at a specific temperature, so that the industrial byproduct gypsum is safely utilized.

Description

technical field [0001] The invention relates to a method and equipment for producing high-temperature gypsum from industrial by-product gypsum, and belongs to the technical field of high-temperature gypsum. Background technique [0002] Industrial by-product gypsum includes phosphogypsum, desulfurization gypsum, fluorine gypsum, titanium gypsum, lemon gypsum, etc. The by-product gypsum contains impurities, and its performance changes, so it cannot be used directly, and often needs to be pretreated before it can be used. For example, phosphogypsum contains soluble phosphorus, soluble fluorine, eutectic phosphorus, organic impurities, etc. These impurities seriously affect the performance of phosphogypsum, thereby affecting its effective utilization. In addition, the titanium gypsum produced by the industry is too fine, with a moisture content as high as 30-40%, and there is currently no economical and effective method to utilize it. [0003] The raw materials for producing ...

Claims

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Application Information

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IPC IPC(8): C04B11/028
CPCC04B11/0283
Inventor 刘开义方炎章裴亚弟
Owner 四川方大新型建材科技开发有限责任公司
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