By-product alkalescence phosphogypsum process control method

A technology of process control and phosphogypsum, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of long detection time and inconvenient real-time regulation, and achieve the effect of simple equipment, obvious effect and low investment

Inactive Publication Date: 2016-03-30
GUIZHOU LUFA IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the results of phosphogypsum treatment are all determined by sampling and testing various indicators. The detection time is long, and it belongs to the post-mortem type, which is not convenient for real-time control during the production process.

Method used

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Embodiment Construction

[0008] The present invention will be described in further detail below, but not as any limitation to the present invention.

[0009] Embodiment of the present invention: a process control method for by-product weakly alkaline phosphogypsum, adding active CaO that does not change the physical and chemical properties of phosphogypsum in the production process of wet-process phosphoric acid, so that harmful acidic phosphogypsum becomes a weak and harmless resource For alkaline phosphogypsum, set sampling points on the conveyor belt of alkaline phosphogypsum, collect phosphogypsum from the sampling points at any time for pH value inspection, and determine the amount of active CaO added to the wet-process phosphoric acid production line according to the pH value. The test method is to put the phosphogypsum sample into a test tube, then add 10 times the amount of water, shake it quickly for 5-10 seconds, and use a precision pH test paper with a range of 5.5 to 9.0 to test the pH valu...

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Abstract

The present invention discloses a by-product alkalescence phosphogypsum process control method. The method comprises: adding active CaO into a WPA (wet process phosphoric acid) production line without modifying physical and chemical properties of the phosphogypsum, and converting harmful by-product acidic phosphogypsum into by-product alkalescence phosphogypsum of a harmless resource; setting a sampling point on an alkaline phosphogypsum conveyor belt; regularly collecting phosphogypsum from the sampling point to carry out PH value test; and determining an active CaO amount adding in the WPA production line according to PH values. According to the method disclosed by the present invention, by adding active CaO into the WPA production line without modifying physical and chemical properties of the phosphogypsum to convert harmful by-product acidic phosphogypsum into by-product alkalescence phosphogypsum of the harmless resource, setting the sampling point on the alkaline phosphogypsum conveyor belt, and using PH test strips to quickly determine PH values of the phosphogypsum, the active CaO addition amount can be increased or decreased in time; and the method disclosed by the present invention is simple in equipment, low in investment and obvious in effects.

Description

technical field [0001] The invention relates to a process control method for by-product weakly alkaline phosphogypsum, which belongs to the technical field of chemical primary pollution. Background technique [0002] At present, the results of phosphogypsum treatment are all determined by sampling and testing various indicators. The detection time is long, and it belongs to the post-mortem type, which is not convenient for real-time regulation during the production process. Contents of the invention [0003] The purpose of the present invention is to provide a process control method for by-product weakly alkaline phosphogypsum, which can quickly, easily and instantly discover the pH value of weakly alkaline phosphogypsum in the production process of wet-process phosphoric acid, thereby increasing or decreasing in time The amount of active CaO is added to ensure that the chemical index of the generated phosphogypsum is within the specified range, so as to overcome the short...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46
Inventor 蒲勇
Owner GUIZHOU LUFA IND CO LTD
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