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Method for comprehensively utilizing kaliophilite ores

A potash nepheline, roasting technology, applied in chemical instruments and methods, applications, potash fertilizers and other directions, can solve the problems of reducing the utilization rate of potassium and aluminum, low production added value, and acid method is not easy to decompose, etc. Useful, suitable for mass production effects

Active Publication Date: 2018-12-04
NORTHEASTERN UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Acid hydrolysis can decompose ka-nepheline to extract potassium and aluminum, leave silicon in the slag after separation, and then extract and utilize it. However, ka-nepheline ore contains potassium feldspar, which is not easy to decompose by acid method, which reduces the utilization rate of potassium and aluminum.
And the common problem of above-mentioned method is to focus on extracting the potassium and aluminum in nepheline, the utilization rate of silicon is low, thus produces a large amount of waste residue, is mostly used in the cement of production low added value, and environmental pressure is big

Method used

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  • Method for comprehensively utilizing kaliophilite ores

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Comparison scheme
Effect test

Embodiment 1

[0037] The present embodiment provides a method for comprehensive utilization of potassium nepheline ore, which specifically comprises the following steps:

[0038] S1. Pretreatment: Pretreatment of potassium nepheline ore.

[0039] Specifically, the chemical composition of the potash nepheline used in the present embodiment mainly includes by weight: SiO 2 62.35%, Al 2 O 3 20.78%, K 2 O 12.66%, Na 2 O 0.70% and Fe 2 O 3 3.16%. The pretreatment mainly includes crushing the nepheline ore first, and then grinding the particle size of the nepheline ore to less than 80 μm, so as to make the subsequent reaction more sufficient.

[0040] S2, mixing and roasting pre-desilication: the pretreated potassium nepheline ore is mixed with sodium carbonate (Na 2 CO 3 ) is mixed evenly, and then a mechanical activation method is used to carry out roasting treatment, the roasting temperature is 850° C., and the roasting holding time is 90 min to obtain the first roasting material. ...

Embodiment 2

[0095] The present embodiment provides a method for comprehensive utilization of potassium nepheline ore, which specifically comprises the following steps:

[0096] S1. Pretreatment: Pretreatment of potassium nepheline ore. Specifically, the chemical composition of the potash nepheline used in the present embodiment mainly includes by weight: SiO 2 55.90%, Al 2 O 3 19.83%, K 2 O 13.72%, Na 2 O 0.02% and Fe 2 O 3 7.65%. Refer to Embodiment 1 for the preprocessing process, which is not repeated here.

[0097] S2, mixing and roasting pre-desilication: the pre-treated potassium nepheline ore is mixed with Na 2 CO 3 Mix evenly, and then use mechanical activation to carry out roasting treatment, the roasting temperature is 875 DEG C, and the roasting holding time is 75min to obtain the first roasting material. Among them, the amount of sodium carbonate is SiO in potassium nepheline ore 2 Just the Na required for the complete reaction 2 CO 3 1.25 times the theoretical...

Embodiment 3

[0113] The present embodiment provides a method for comprehensive utilization of potassium nepheline ore, which specifically comprises the following steps:

[0114] S1. Pretreatment: Pretreatment of potassium nepheline ore. Specifically, the chemical composition of the potash nepheline used in the present embodiment mainly includes by weight: SiO 2 52.82%, Al 2 O 3 22.50%, K 2 O 14.22%, Na 2 O 0.54% and Fe 2 O 3 4.88%. Refer to Embodiment 1 for the preprocessing process, which is not repeated here.

[0115] S2, mixing and roasting pre-desilication: the pre-treated potassium nepheline ore is mixed with Na 2 CO 3 Mix uniformly, and then use mechanical activation to carry out roasting treatment, the roasting temperature is 800 DEG C, and the roasting holding time is 120min to obtain the first roasting material. Among them, the amount of sodium carbonate is SiO in potassium nepheline ore 2 Just the Na required for the complete reaction 2 CO 3 0.8 times the theoreti...

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Abstract

The invention relates to a method for comprehensively utilizing kaliophilite ores. The method comprises the following steps: S1, preprocessing the kaliophilite ores; S2, uniformly mixing the preprocessed kaliophilite ores with sodium carbonate, and calcining the obtained mixture to obtain a first calcined material; S3, dissolving the first calcined material with water or a sodium hydroxide solution, and performing separating filtration to obtain pre-desiliconized residues containing potassium and aluminum; S4, uniformly mixing the pre-desiliconized residues with ammonium sulfate, and calciningthe obtained mixture to obtain a second calcined material; and S5, dissolving the second calcined material in water, and performing filtering separation to obtain silicon residues and a potassium-containing ammonium aluminum sulfate solution. The method for comprehensively utilizing the kaliophilite ores has the advantages of great increase of the utilization ratio of elements in the kaliophiliteores, realization of high value-added utilization, small generation amount of waste residues, simple process, and suitableness for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal metallurgy, and in particular relates to a method for comprehensively utilizing potassium nepheline ore. Background technique [0002] my country is a big country in the aluminum industry, and its aluminum production accounts for about 40% of the world's aluminum production. However, the reserves of bauxite resources that can be used for industrial production in my country are low, and the technical content of bauxite mining and utilization is not high, resulting in serious waste of resources. The guarantee level of bauxite resources is further reduced. The discovery of high-iron bauxite and high-sulfur bauxite such as Zhangpu in Fujian and Guigang in Guangxi has greatly eased the current situation of the lack of bauxite in my country. Utilization scheme, but has not been rationally developed and utilized. [0003] my country is also a big agricultural country, and its crop output ranks ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/04C22B3/12C22B3/44C22B26/10C22B21/00C01D5/00C05G1/00C01B33/12C01F7/20C01F11/18
CPCC01B33/12C01D5/00C01F7/20C01F11/18C05C3/00C05G5/23C22B1/02C22B3/04C22B3/12C22B3/44C22B21/0015C22B26/10C05D1/02Y02P10/20
Inventor 申晓毅邵鸿媚刘佳囡翟玉春
Owner NORTHEASTERN UNIV
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