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Process for preparing potash magnesium sulphate fertilizer by muddy potassium mixed salt mineral

A technology of potassium magnesium sulfate fertilizer and potassium mixed salt ore, which is applied in the production process field of potassium magnesium sulfate fertilizer, can solve the problems of not meeting quality requirements, poor quality of potassium magnesium fertilizer, low recovery rate of potassium magnesium fertilizer, etc., and achieves Ease of operation, high recovery rate, and low cost

Inactive Publication Date: 2012-06-27
BLUESTAR LEHIGH ENG INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The potassium mixed salts used in these two patent documents basically do not contain water-insoluble matter, and for primary potassium mixed salt mines with high water-insoluble content (especially primary potassium mixed salt mines with a water-insoluble content of more than 5%), the above-mentioned technology is used to obtain The recovery rate of potassium and magnesium fertilizers is very low, and the quality of potassium and magnesium fertilizers is also poor, which cannot meet the quality requirements of the national standard GB / T20937-2007

Method used

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  • Process for preparing potash magnesium sulphate fertilizer by muddy potassium mixed salt mineral
  • Process for preparing potash magnesium sulphate fertilizer by muddy potassium mixed salt mineral

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, a kind of technique that utilizes primary potassium mixed salt ore to produce potassium magnesium sulfate fertilizer, its steps are as follows:

[0026] (1) After the original potassium mixed salt ore is mined, it is crushed to less than 4 mm. Under normal temperature conditions, the ore is first added to a scrubbing bucket with stirring to wash the ore. The ore washing medium is saturated brine, and the mass concentration of the ore is 20%. Washing time is 5 minutes;

[0027] (2) Sieve the washed pulp with a 60-mesh vibrating sieve, the under-sieve will settle naturally, and the brine after clarification will be returned to the next ore washing; the over-sieve will be ground, and the grinding mass concentration will be 50%;

[0028] (3) Add the fine mud inhibitor to the potassium mixed salt after ore grinding, and then add the collector to enrich the potassium-containing mineral langbeinite by flotation, and the obtained concentrate is coarse potassium an...

Embodiment 2

[0030] Embodiment 2, a kind of technique that utilizes primary potassium mixed salt ore to produce potassium magnesium sulfate fertilizer, its steps are as follows:

[0031] (1) After the original potassium mixed salt ore is mined, it is crushed to less than 4 mm. Under normal temperature conditions, the ore is first added to a scrubbing bucket with stirring to wash the ore. The ore washing medium is saturated brine, and the mass concentration of the ore is 60%. Washing time is 60 minutes;

[0032] (2) Sieve the washed pulp with a 200-mesh vibrating sieve, the under-sieve will settle naturally, and the brine after clarification will be returned to the next ore washing; the over-sieve will be ground, and the grinding mass concentration will be 60%;

[0033] (3) Add the fine mud inhibitor to the potassium mixed salt after ore grinding, and then add the collector to enrich the potassium-containing mineral langbeinite by flotation, and the obtained concentrate is coarse potassium ...

Embodiment 3

[0035] Embodiment 3, a kind of technique that utilizes primary potassium mixed salt ore to produce potassium magnesium sulfate fertilizer, its steps are as follows:

[0036] (1) After the original potassium mixed salt ore is mined, it is crushed to less than 4mm. Under normal temperature conditions, the ore is first added to a scrubbing bucket with stirring to wash the ore. The ore washing medium is saturated brine, and the ore washing mass concentration is 40%. Washing time is 30 minutes;

[0037] (2) Screen the washed ore pulp with a 150-mesh vibrating sieve, and the under-sieve will settle naturally, and the brine after clarification will be returned to the next ore washing; the over-sieve will be ground, and the grinding mass concentration will be 55%;

[0038] (3) Add the fine mud inhibitor to the potassium mixed salt after ore grinding, and then add the collector to enrich the potassium-containing mineral langbeinite by flotation, and the obtained concentrate is coarse p...

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Abstract

The invention relates to a process for preparing a potash magnesium sulphate fertilizer by a protogenic potassium mixed salt mineral, which is characterized by comprising the following steps that: the protogenic potassium mixed salt mineral is exploited and crushed, and the mineral is washed under the condition of normal temperature with the mineral washing medium of saturated bittern; mineral slurry is sieved with a vibration screen of 60-200 meshes; riddlings are ground; a fine silt inhibitor is added in the potassium mixed salt after grinding treatment, then a collecting agent is added, potassium-bearing mineral picromerite is enriched through flotation, and the obtained concentrate is a crude potassium-magnesium fertilizer; a proper amount of fresh water is added into the crude potassium-magnesium fertilizer obtained through flotation; and solid and liquid are separated to obtain a wet potassium-magnesium fertilizer, and a finished potash magnesium sulphate fertilizer is obtained through drying. The process disclosed by the invention is simple, is convenient to operate, has low energy consumption, high recovery rate, and good economic benefits, can be used for producing high-quality potassic-magnesian fertilizer products directly from poor-quality potassium mixed salt minerals with high content of water insoluble matter, and is low in cost and easy in realizing industrial mass production.

Description

technical field [0001] The invention relates to a preparation process of potassium and magnesium sulfate fertilizer, especially suitable for producing high-quality potassium and magnesium sulfate from primary low-quality potassium mixed salt mines containing a certain amount of water-insoluble matter and potassium-containing minerals mainly composed of langbeinite Fat craft. Background technique [0002] At present, the methods of producing potassium and magnesium sulfate fertilizer from potassium mixed salt mine are generally divided into conversion-flotation method and flotation-conversion method. The potassium mixed salt obtained after precipitating a part of sodium chloride has a very low content of insolubles, generally less than 1%. However, there is no relatively mature process for producing potassium and magnesium fertilizers by using primary potassium mixed salt mines with relatively high water-insoluble content. [0003] In the prior art, the Chinese patent appli...

Claims

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Application Information

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IPC IPC(8): C05D11/00
Inventor 张红茹宋文义马晓青
Owner BLUESTAR LEHIGH ENG INST CO LTD