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Crystallizer for hydrolyzing carnallite

A technology of crystallizer and carnallite, which is applied in the field of salt chemical industry, can solve problems that cannot be solved, and achieve the effect of increasing the contact area

Active Publication Date: 2014-05-07
QINGHAI SALT LAKE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although this device can be used to realize photobrine hydrolysis, it cannot solve the above defects

Method used

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  • Crystallizer for hydrolyzing carnallite
  • Crystallizer for hydrolyzing carnallite
  • Crystallizer for hydrolyzing carnallite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: Crystallizer for hydrolysis of carnallite

[0046] The structure of the crystallizer is attached as figure 2 As shown, it includes a housing 9, an inner cylinder 2 and an outer cylinder 1 arranged in the housing 9, a carnallite inlet 3 and a mother liquor inlet 4 communicated with the inner cylinder 2, and a decomposition liquid outlet 5 is arranged on the upper part of the housing 9 , the product outlet 6 is set at the bottom of the housing 9, the inner cylinder 2 is located in the outer cylinder 1 and is coaxial with the outer cylinder 1, and a stirring device is provided at the bottom of the inner cylinder 2; it is characterized in that the inner cylinder 2 and The longitudinal cross-sectional shape of the outer cylinder 1 is that the upper part is an inverted cone, while the lower part is rectangular; the distance between the bottom of the inner cylinder 2 and the bottom of the elliptical cone shell is greater than the distance between the bottom of t...

Embodiment 2

[0054] Example 2: Crystallizer for hydrolysis of carnallite

[0055] The implementation of this embodiment is the same as that of Example 1, except that the angle between the inverted tapered side of the outer cylinder 1 and the extended line of the rectangular side is 40°, and the angle between the inverted tapered side of the inner tube 2 and the extended line of the rectangular side The angle is 50°, and the included angle between the shell side wall of the crystallizer and the shell bottom is 70°.

[0056] Use this embodiment crystallizer, according to appendix image 3 The process flow and the steps described in the instructions are carried out under the following conditions for carnallite hydrolysis: the processing capacity of low-sodium carnallite is 450t / h, and the underflow flow rate is controlled at 340m 3 / h, the underflow concentration is 28% (volume ratio). Adopt my country's existing analysis standard or literature data to analyze relevant components in low-sod...

Embodiment 3

[0057] Example 3: Crystallizer for hydrolysis of carnallite

[0058] The implementation of this embodiment is the same as that of Example 1, except that the included angle between the inverted tapered side of the outer cylinder 1 and the extended line of the rectangular side is 38°, and the included angle between the inverted tapered side of the inner tube 2 and the extended line of the rectangular side The angle is 40°, and the included angle between the shell side wall of the crystallizer and the shell bottom is 57°.

[0059] Use this embodiment crystallizer, according to appendix image 3 The process flow and the steps described in the instruction manual carry out the hydrolysis of carnallite under the following conditions: the processing capacity of low-sodium carnallite is 380t / h, and the flow rate of the underflow is controlled at 360m 3 / h, the underflow concentration is 32% (volume ratio). Adopt my country's existing analysis standard or literature data to analyze re...

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Abstract

The invention relates to a crystallizer for hydrolyzing carnallite. The crystallize comprises an inner cylinder, an outer cylinder, a mother solution distributor, a stirring paddle, a crystallizer cylinder body, a low-sodium carnallite inlet, a mother solution inlet, a decomposition liquid outlet and a product outlet. According to the crystallizer, the remaining time of low-sodium carnallite in a dissolving region can be prolonged, and the problem that low-sodium carnallite is not fully mixed and decomposed and then overflows to the bottom of the crystallizer from the upper part of the inner cylinder in the existing crystallizer is solved; and generated potassium chloride particles can grow above 0.2mm in particle size to ensure that solid potassium chloride is easily dewatered and dried, and washing water and heat energy required by drying are saved.

Description

【Technical field】 [0001] The invention belongs to the technical field of salt chemical industry. More specifically, the invention relates to a crystallizer for the hydrolysis of carnallite. 【Background technique】 [0002] Carnallite is a halide mineral containing potassium and magnesium (KCl MgCl 2 ·6H 2 O), often co-existing with halite and potassium halite. Carnallite is abundant in the Chaerhan Salt Lake in the Qaidam Basin of China and the potassium halite deposit in Yunnan. The uses of carnallite include the manufacture of potash fertilizers and mineral raw materials for the extraction of magnesium metal. It is mainly used as a refining agent for extracting metal magnesium, as a protective agent for the production of aluminum-magnesium alloys, as a welding agent for aluminum-magnesium alloys, as a flux for metals, as a raw material for the production of potassium salts and magnesium salts, and for the manufacture of fertilizers and hydrochloric acid, etc. . [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/22
Inventor 李小松任红卫宋兴福李辉林魏强许振琪刘星明
Owner QINGHAI SALT LAKE IND
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