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Novel crystallization method for recycling thermal-sensitive dissolving solution-containing medium

A technology with temperature sensitivity and a new method, applied in the direction of ferric sulfate, etc., can solve problems such as single crystallization method

Active Publication Date: 2011-01-05
LOMON BILLIONS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The current technology mainly adopts a single crystallization method, that is, vacuum crystallization or freezing crystallization, so its defects are obvious

Method used

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  • Novel crystallization method for recycling thermal-sensitive dissolving solution-containing medium
  • Novel crystallization method for recycling thermal-sensitive dissolving solution-containing medium
  • Novel crystallization method for recycling thermal-sensitive dissolving solution-containing medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The titanium liquid at 53 degrees Celsius and 125g / l iron-titanium ratio of 0.78 flowing out of the high-level tank continuously enters the vacuum crystallizer, and the vacuum degree of the vacuum crystallizer gradually increases under the action of 0.35MPa superheated steam passing through the main and auxiliary jet injectors. Increase to 0.09-0.098MPa; the temperature of the titanium liquid flows from top to bottom in the vacuum crystallizer, and the ferrous sulfate gradually becomes saturated. After 30 minutes, the temperature of the titanium liquid gradually decreases to 33 degrees Celsius, and 25% of the ferrous sulfate crystallizes Precipitation, the suspension containing ferrous sulfate crystals flows into the freezing crystallization tank, and the concentration of the titanium solution is increased to 155g / l; in the freezing crystallization tank, it exchanges heat indirectly with the cold liquid at 7 degrees Celsius from the lithium bromide refrigerator for 150 mi...

Embodiment 2

[0032] The titanium liquid at 52 degrees Celsius and 124g / l copper-titanium ratio of 0.77 flowing out of the high-level tank continuously enters the vacuum crystallizer, and the vacuum degree of the vacuum crystallizer gradually increases under the action of the 0.36MPa superheated steam passing through the main and auxiliary spray injectors. Increase to 0.09-0.098MPa; the temperature of the titanium liquid flows from top to bottom in the vacuum crystallizer, and the cuprous sulfate gradually becomes saturated. After 32 minutes, the temperature of the titanium liquid gradually decreases to 32 degrees Celsius, and 26% of the cuprous sulfate crystallizes Precipitation, the suspension containing cuprous sulfate crystals flows into the freezing crystallization tank, and the concentration of the titanium solution is increased to 157g / l; in the freezing crystallization tank, it exchanges heat indirectly with the cold liquid at 7 degrees Celsius from the lithium bromide refrigerator fo...

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Abstract

The invention discloses a novel crystallization method for recycling a thermal-sensitive dissolving solution-containing medium. The novel crystallization method comprises the following steps of: 1, pumping the purified thermal-sensitive dissolving solution-containing medium into a high-level gauge tank, continuously delivering thermal-sensitive dissolving solution into a vacuum crystallizer from the high-level gauge tank, and gradually crystallizing to precipitate a thermal-sensitive medium by vacuum crystallization; and 2, allowing suspension with part of the thermal-sensitive medium precipitated to flow out continuously from the vacuum crystallizer and enter a freezing crystallization tank with a stirring function, and making the thermal-sensitive dissolving solution exchange heat with a cold source from a refrigerator in the freezing crystallization tank for further cooling and precipitating the thermal-sensitive medium, wherein small thermal-sensitive medium crystals are continuously dissolved and crystallized, so that relatively large thermal-sensitive medium crystals are formed finally. In the invention, the vacuum crystallization is completed in a time period of 3 to 4 hours, and energy consumption per ton is considerably reduced.

Description

technical field [0001] The invention relates to a new crystallization method for recovering a medium containing a temperature-sensitive dissolved solution. Background technique [0002] The temperature-sensitive dissolution solution mentioned in the present invention refers to that the dissolution saturation of the dissolution medium in the solution is greatly affected by temperature, that is, when the temperature of the solution rises, the saturation of the solution medium rises, and when the temperature of the solution drops , The saturation of the solution medium decreases, such as ferrous sulfate, copper sulfate. At present, there are two main methods of crystallization from temperature-sensitive solution solutions: freeze crystallization and vacuum crystallization. [0003] Frozen crystallization is to use the evaporation of the refrigeration medium (liquid ammonia or freon or lithium bromide, etc.) to take away the heat, so that the temperature of the frozen brine is ...

Claims

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Application Information

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IPC IPC(8): C01G49/14
Inventor 杨民乐吴彭森刘多和陈建立赵波许丽娟王艳艳
Owner LOMON BILLIONS GRP CO LTD
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