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Method for extracting soft potassium magnesium vanadium from carnallite containing magnesium sulfate

A technology of carnallite ore and soft potassium magnesium vanadium, applied in the field of recovery of potassium and sulfate ion resources, can solve the problems of complex process and low recovery rate, achieve high recovery rate, avoid resource waste, and good economic value

Active Publication Date: 2017-09-22
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved in the present invention is to overcome the deficiencies of the prior art, especially to overcome the deficiencies of the prior art complicated process and low recovery rate, and provide a method for extracting soft potassium magnesium vanadium with carnallite ore containing magnesium sulfate , to maximize the use of the useful element K in the carnallite ore containing magnesium sulfate + and SO 4 2- to extract soft potassium magnesium vanadium

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  • Method for extracting soft potassium magnesium vanadium from carnallite containing magnesium sulfate

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Embodiment 1

[0033] This embodiment includes the following steps:

[0034] (1) Decomposition: Mix carnallite ore containing magnesium sulfate with water, washing mother liquor, and soft potassium flotation mother liquor at a mass ratio of 1:0.12:0.06:0.37. The decomposition temperature is controlled at 25°C and stirred for 40 minutes to obtain decomposition. The final solid-liquid mixed pulp;

[0035] (2) Dehalogenation: filter the solid-liquid mixed pulp obtained in step (1) to achieve solid-liquid separation, and obtain solid salt and high-magnesium mother liquor. The chemical elements in the solid salt include: K + 5.54%, Na + 8.76%, Mg 2+ 4.51%, Cl - 19.56%, SO 4 2- 16.98%, the rest is water, keep it for use; the chemical element composition of high-magnesium mother liquor is: K + 1.68%, Na + 0.21%, Mg 2+ 7.01%, Cl - 19.56%, SO 4 2- 3.72%, the rest is water, which is discharged to the carnallite salt field and evaporated in a cycle;

[0036] (3) Transformation: Mix the soli...

Embodiment 2

[0046] This embodiment includes the following steps:

[0047] (1) Decomposition: Mix carnallite ore containing magnesium sulfate with water, washing mother liquor, and soft potassium flotation mother liquor at a mass ratio of 1:0.16:0.06:0.30, stir for 60 minutes, and control the decomposition temperature at 15°C. Obtain solid-liquid mixed pulp;

[0048] (2) Dehalogenation: filter the solid-liquid mixed pulp obtained in step (1) to achieve solid-liquid separation, and obtain solid salt and high-magnesium mother liquor. The chemical elements in the solid salt are composed of: K + 6.39%, Na + 8.46%, Mg 2+ 4.87%, Cl - 20.33%, SO 4 2- 17.23%, the rest is water, keep it for use; the chemical element composition of high-magnesium mother liquor is: K + 1.25%, Na + 0.335%, Mg 2+ 6.94%, Cl - 19.55%, SO 4 2- 3.18%, the rest is water, which is discharged to the carnallite salt field and evaporated in a cycle;

[0049] (3) Transformation: Mix the solid salt obtained in step (2...

Embodiment 3

[0059] This embodiment includes the following steps:

[0060] (1) Decomposition: Mix carnallite ore containing magnesium sulfate with water, washing mother liquor, and soft potassium flotation mother liquor at a mass ratio of 1:0.20:0.08:0.25, stir for 80 minutes, and control the decomposition temperature at 20°C. Obtain solid-liquid mixed pulp;

[0061] (2) Dehalogenation: filter the solid-liquid mixed pulp obtained in step (1) to achieve solid-liquid separation, and obtain solid salt and high-magnesium mother liquor. The chemical elements in the solid salt are composed of: K + 7.64%, Na + 8.257%, Mg 2+ 5.32%, Cl - 20.33%, SO 4 2- 20.12%, the rest is water, keep it for use; the chemical element composition of high-magnesium mother liquor is: K + 1.47%, Na + 0.369%, Mg 2+ 6.94%, Cl - 19.58%, SO 4 2- 3.48%, the rest is water, which is discharged to the carnallite salt field and evaporated in a cycle;

[0062] (3) Transformation: Mix the solid salt obtained in step (...

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Abstract

The invention relates to a method for extracting soft potassium magnesium vanadium from carnallite containing magnesium sulfate. The method comprises the following steps: (1) decomposing, i.e., mixing the carnallite containing the magnesium sulfate with water or slight saline water, washing mother liquid and soft potassium flotation mother liquid, and decomposing to obtain solid-liquid mixed ore pulp; (2) dehalogenating by filtering the solid-liquid mixed ore pulp to obtain solid salt and high-magnesium mother liquid; (3) converting by mixing the solid salt with fresh water or the slight saline water and the soft potassium flotation mother liquid to obtain converted solid-liquid mixed ore pulp; (4) carrying out flotation i.e., adding the solid-liquid mixed ore pulp into flotation chemicals for flotation; (5) concentrating and filtering; and (6) washing rough concentrate. The method has the advantages of simple process, easy operation, high recovery rate of main useful elements including K<+> and SO4<2+> in raw ore and high resource utilization rate; the resource waste is avoided; the method has good economic value and appreciation space, and novel process routes and ideas are provided for extracting soft potassium magnesium vanadium from carnallite containing magnesium sulfate or producing potassium sulphate.

Description

technical field [0001] The invention relates to a method for extracting soft potassium magnesium vanadium from carnallite ore containing magnesium sulfate, in particular to a method for recovering potassium and sulfate ion resources from carnallite ore containing magnesium sulfate. Background technique [0002] Soft potassium magnesium vanadium, molecular formula K 2 SO 4 · MgSO 4 ·6H 2 O is an extremely important useful mineral in the field of salt lake resource development and extraction of potassium fertilizer. It is the main component of potassium and magnesium sulfate fertilizer and is also one of the important intermediate products for the production of potassium sulfate by salt lake conversion method. [0003] In the field of development of sulfate-type salt lake brine, at present, the primary raw material for the production of potassium sulfate is mainly obtained by secondary processing through salt field mineralization. The existing technology mainly involves pot...

Claims

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Application Information

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IPC IPC(8): C01F5/40C01D5/00
CPCC01D5/00C01F5/40C01P2004/82C01P2006/80
Inventor 季荣甘顺鹏胡勇蒋世鹏
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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