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Filtration method in the process of extracting iodine from iodine-containing phosphorus ore

A filtration method and technology of phosphate rock, applied in the direction of iodine/hydrogen iodide, iodine, etc., to achieve the effect of small loss, low moisture content and reduction of natural sublimation

Active Publication Date: 2011-12-07
WENGFU (GRP) CO LTD
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[0014] In the iodine extraction section in the phosphate fertilizer plant of Wengfu (Group) Company, the iodine element and water suspension in the iodine analysis tank during the process of extracting iodine from iodine-containing phosphate ore are discharged into the filter box and suspended In the solution, the mass fraction of iodine is controlled at 8%; the vacuum pump and the filter box are connected to the filter box to increase the pressure difference of the filter box and reduce the temperature of the contact surface between the iodine simple substance and the environment, and the pressure difference of the filter box is controlled at 0.005MPa ; The temperature of the contact surface between elemental iodine and the environment is controlled at 18°C ​​to 23°C; filtering is carried out under this vacuum pressure difference and low temperature to realize the separation and drying process of elemental iodine and water.

[0015] According to the filtration technology and o...

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Abstract

The invention discloses a filtering method in the process of extracting iodine from iodine-containing phosphorus ore as a raw material. The suspension with water is discharged into the filter box; (2) the vacuum pump and the filter box are connected to the filter box to increase the pressure difference of the filter box and reduce the temperature of the iodine simple substance and the interface with the environment; (3) maintain sufficient The vacuum pressure difference and the system are filtered at low temperature to realize the separation and drying process of elemental iodine and water. The present invention reduces the temperature of the filter box system by using a vacuum pump to increase the pressure difference of the filter box and utilizes air flow to reduce the natural sublimation of iodine in the filtration process; compared with the prior art, the loss of iodine in the filtration process will be reduced Minimized, the resulting product is low in moisture and high in quality. It is suitable for production enterprises that extract iodine from phosphate rock.

Description

technical field [0001] The invention relates to iodine, in particular to a process for extracting iodine from iodine-containing phosphate ore, and further to a filtering method in the process. Background technique [0002] Iodine often exists in a variety of mineral resources in the form of associated ore. The emergence of industrial technology for the recovery of iodine resources associated with phosphate rock has enabled the extraction and utilization of iodine from phosphate rock. [0003] Extracting iodine from phosphate rock is mainly carried out by using phosphoric acid produced from phosphate rock as a raw material. This process technology has been recorded in Chinese Patent No. 200510003058.2 "Method for Extracting Iodine from Dilute Phosphoric Acid Produced in the Production Process of Iodine-Containing Phosphorus Rock" . In the process of producing phosphoric acid from phosphate rock, iodine as an associated mineral enters phosphoric acid in the form of ions, and ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B7/14
Inventor 雷学联张涛覃礼云罗贤松郑周勋刘勇姚石林
Owner WENGFU (GRP) CO LTD
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