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A method for producing potassium sulfate and its by-products using alunite in flotation tailings

A technology for flotation of tailings and alunite, which is applied in the preparation of sulfate/bisulfate and the removal of solid waste, etc., can solve the problem of low potash fertilizer output and self-sufficiency rate, low comprehensive utilization level of tailings, insufficient potash fertilizer self-sufficiency rate, etc. problems, to achieve the effect of improving the comprehensive utilization level, shortening the reduction roasting time, and reducing the floor area of ​​the workshop

Active Publication Date: 2014-10-08
ZIJIN MINING GROUP
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for producing potassium sulfate and its by-products by using alunite in flotation tailings, and its purpose is to solve the problem of low level of comprehensive utilization of tailings and very poor potassium resources in my country at the present stage, and low potash fertilizer output and self-sufficiency rate , most of them need to rely on imports, and the external dependence is too high. In the next few years, the situation of insufficient potash self-sufficiency will continue.

Method used

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  • A method for producing potassium sulfate and its by-products using alunite in flotation tailings
  • A method for producing potassium sulfate and its by-products using alunite in flotation tailings
  • A method for producing potassium sulfate and its by-products using alunite in flotation tailings

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Embodiment 1

[0020] The main mineral of a flotation tailings is quartz, followed by alunite and dickite, and a small amount exists in the form of sericite, feldspar, chlorite, epidote, etc. The chemical analysis results of the flotation tailings are shown in Table 1.

[0021] Table 1 Analysis results of main elements of a certain flotation tailings / %

[0022]

[0023] Note:" ※ "The unit is g / t, the same below.

[0024] A method for producing potassium sulfate and its by-products from alunite in flotation tailings comprises the following steps in sequence.

[0025]The first step: alunite flotation: the flotation pulp is adjusted to pH = 9.0 with sodium carbonate, and then the dispersion inhibitor water glass 500g / t is added and stirred for 3 minutes, and the collector oleic acid is stirred for 2 minutes. After 7 minutes of selection, the tailings are discarded; the coarsely selected alunite concentrate is added with water glass 400g / t for the first selection for 4 minutes, and the midd...

Embodiment 2

[0032] The main minerals of a flotation tailings are quartz and chalcedony, followed by alunite, and others include kaolin, sericite, feldspar, etc. The chemical analysis results of the flotation tailings are shown in Table 3.

[0033] Table 3 Analysis results of chemical composition of flotation tailings / %

[0034]

[0035] A method for producing potassium sulfate and its by-products from alunite in flotation tailings comprises the following steps in sequence.

[0036] The first step: alunite flotation: the flotation pulp is adjusted to pH = 9.5 with sodium carbonate, and then the dispersion inhibitor water glass 500g / t is added and stirred for 3 minutes, and the collector oleic acid is stirred for 2 minutes. After 6 minutes of selection, the tailings are discarded; the coarsely selected alunite concentrate is added with water glass 300g / t for the first selection for 4 minutes, and the middle ore selected for the first time is discarded; the first selected alunite concentr...

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Abstract

The invention provides a method utilizing alunite in flotation tailing to produce potassium sulfate and auxiliary products thereof. The method fully utilizes secondary resources, changes waste into treasure, achieves minimizing, harmlessness and recycling of solid waste, improves comprehensive utilizing level of tailings in China, relieves an acute contradiction of supply and demand of potassium sulfate, reduces loss on foreign exchange caused by mass importation of the potassium sulfate, improves guarantee age limit of kalium and the international competitiveness of the kalium salt industry, completely solves the key scientific and technical problem of economic, clean efficient and comprehensive utilization of the alunite in flotation, the tailings are utilized as resources, establishes tailing comprehensive utilization technical demonstration project, and promotes the development of the comprehensive utilization technique of the tailing in China.

Description

1. Technical field [0001] The invention relates to a method for comprehensive utilization of tailings, in particular to a method for producing potassium sulfate and its by-products by using alunite in flotation tailings. 2. Background technology [0002] Mineral resources are one of the important means of production on which human beings depend, and their main characteristics are non-renewable and irreplaceable in the short term. Mineral resources are the basic raw materials for my country's industrial development. At present, more than 90% of my country's energy and about 80% of industrial raw materials come from mineral resources, and more than 5 billion tons of mineral raw materials are put into the operation of the national economy every year. my country is a big producer of mineral resources, but its per capita mineral resources are relatively small. It is especially important to improve the comprehensive utilization of mineral resources and tailings. "China's 21st Cen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C01D5/02
Inventor 谭希发衷水平邹来昌方荣茂范小双
Owner ZIJIN MINING GROUP
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