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Technology for extracting potassium and removing sodium from high-sodium polyhalite ore

A polyhalite and high-sodium technology, which is applied in the field of extracting and obtaining low-sodium polyhalite, can solve the problems of high-sodium polyhalite mine development and utilization that have not been reported, and achieve low comprehensive production cost, small investment, and water consumption low effect

Inactive Publication Date: 2015-10-28
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The process routes adopted in the above patents and documents are all aimed at low-sodium polyhalite or pure polyhalite ore, but there is no relevant report on the development and utilization of high-sodium polyhalite ore (NaCl mass percentage ≥ 10%)

Method used

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  • Technology for extracting potassium and removing sodium from high-sodium polyhalite ore

Examples

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Embodiment 1

[0023] This embodiment includes the following steps:

[0024] (1) High sodium polyhalite ore (K 2 SO 4 · MgSO 4 2CaSO 4 2H 2 O content 60.12wt%, NaCl content 34.22wt%) ore grinding to -150 mesh (-0.106mm) accounted for 81.21wt%, the grinding method was ball milling, the grinding mass concentration was 50%, and the grinding medium was NaCl saturated mother liquor;

[0025] (2) In the NaCl saturated mother liquor, use one roughing, two beneficiation, one sweeping, beneficiation I medium ore, sweeping concentrate return to roughing, beneficiation II medium ore return to beneficiation I and return to the closed circuit Technological process, the roughing concentration is 29wt%, and the sweeping concentration is 21wt%; roughing adds anionic collector sodium dodecylsulfonate 150 g / ton, and the flotation time is 4 minutes, and sweeping adds anionic collector ten Sodium dialkyl sulfonate 75 grams / ton, flotation time is 3 minutes, be selected as do not add collecting agent twice s...

Embodiment 2

[0028] This embodiment includes the following steps:

[0029] (1) High sodium polyhalite ore (K 2 SO 4 · MgSO 4 2CaSO 4 2H 2 O content 76.72wt%, NaCl content 16.32wt%) ore grinding to -150 mesh (-0.106mm) accounts for 83.20wt%, the grinding method is ball milling, the grinding mass concentration is 60%, and the grinding medium is NaCl saturated mother liquor;

[0030] (2) In the NaCl saturated mother liquor, use one roughing, two beneficiation, one sweeping, beneficiation I medium ore, sweeping concentrate return to roughing, beneficiation II medium ore return to beneficiation I and return to the closed circuit Process flow, roughing concentration is 30.02wt%, sweeping concentration is 21.23wt%; adding anion collector sodium hexadecylsulfonate 180 g / ton in roughing, flotation time is 4 minutes, sweeping adding anion collection Sodium hexadecyl sulfonate is 75 grams / ton, and the flotation time is 3 minutes, and the selection is performed twice without adding a collector, a...

Embodiment 3

[0033] This embodiment includes the following steps:

[0034] (1) High sodium polyhalite ore (K 2 SO 4 · MgSO 4 2CaSO 4 2H 2 O content 52.99wt%, NaCl content 41.23wt%) ore grinding to -150 mesh (-0.106mm) accounts for 78.83wt%, the grinding method is ball milling, the grinding mass concentration is 65%, and the grinding medium is NaCl saturated mother liquor;

[0035] (2) In the NaCl saturated mother liquor, use one roughing, two beneficiation, one sweeping, beneficiation I medium ore, sweeping concentrate return to roughing, beneficiation II medium ore return to beneficiation I and return to the closed circuit Process flow, roughing concentration is 30.01wt%, sweeping concentration is 21.42wt%; adding anion collector sodium lauryl sulfate 125 g / ton in roughing, flotation time is 3 minutes, sweeping adds anion collector Sodium lauryl sulphate 50 grams / ton, flotation time is 3 minutes, and the selection is twice selection without collector, flotation time is 4 minutes; obt...

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Abstract

A technology for extracting potassium and removing sodium from high-sodium polyhalite ore includes the following steps that firstly, the high-sodium polyhalite ore is ground; secondly, flotation mother liquor returns to a closed technological process in the sequence of one-time roughing, two-time concentration, one-time scavenging, returning of middlings in concentration I and scavenged concentrate to roughing, and returning of middlings in the concentration II to concentration I, wherein 100-200 g / ton anionic collectors are added in the roughing process, flotation time ranges from 3 minutes to 5 minutes, 50-100 g / ton anionic collectors are added in the scavenging process, flotation time ranges from 2 minutes to 3 minutes, no collectors are added in the process of the two-time concentration, flotation time ranges from 3 minutes to 5 minutes, and flotation concentrate can be obtained; and thirdly, the flotation concentrate is washed and filtered, and low-sodium polyhalite is obtained. The technology is reasonable in process; the flotation technology is mature and reliable; the process and the reagent rule are simple; the technology is low in investment, easy to operate, low in energy and water consumption and low in comprehensive production cost; and large-scale industrial production can be achieved easily.

Description

technical field [0001] The invention relates to a process for extracting potassium and removing sodium from high-sodium polyhalite ore, in particular to a process for obtaining low-sodium polyhalite from high-sodium polyhalite ore by means of positive flotation-washing. Background technique [0002] Polyhalite (K 2 SO 4 · MgSO 4 2CaSO 4 2H 2 O) is a potassium-magnesium sulfate double salt mineral with little solubility in water. The ore occurs in gypsum and anhydrite rock, and is a paragenetic mineral, which is an insoluble potassium ore widely distributed in sulfate-type potash deposits. Its K 2 The theoretical content of O is 15.64%. However, due to its poor water solubility and deep ore body burial, mining technology is difficult, so it has long been regarded as a dull mine and has not been utilized. Therefore, the research and development of polyhalite ore is of great significance to changing the status quo of potassium deficiency in China and developing the potas...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03D1/00
CPCB03D1/00B03B1/00
Inventor 季荣甘顺鹏胡勇冯文平谭之海
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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