Comprehensive utilization method and device for acid dissolution extraction of valuable element chromium silicon iron magnesium aluminum nickel from chromite

A stirring device and material chamber technology, which is applied in the field of comprehensive mining and utilization of chromite, can solve the problems of not being able to remove ions cleanly and fail to achieve high-purity purposes, and achieve good economic benefits, high raw material utilization, and low discharge of three wastes Effect

Active Publication Date: 2015-07-08
于志远
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, this method of removing impurities cannot completely remove the ions on the surface of the solid precipitate, and cannot achieve the real purpose of high purity.

Method used

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  • Comprehensive utilization method and device for acid dissolution extraction of valuable element chromium silicon iron magnesium aluminum nickel from chromite
  • Comprehensive utilization method and device for acid dissolution extraction of valuable element chromium silicon iron magnesium aluminum nickel from chromite
  • Comprehensive utilization method and device for acid dissolution extraction of valuable element chromium silicon iron magnesium aluminum nickel from chromite

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Experimental program
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Effect test

Embodiment 1

[0083] An ionic membrane impurity removal device, such as Figure 7 As shown, it is characterized in that: it includes an anode chamber 1, a cathode chamber 2, and a material chamber 3, and the material chamber 3 is located between the anode chamber 1 and the cathode chamber 2,

[0084] in,

[0085] The anode chamber is provided with an anode 11, which is separated from the material chamber by an anion membrane 4;

[0086] The cathode chamber is provided with a cathode 21, which is separated from the material chamber by a cationic membrane 5;

[0087] The material chamber is provided with a material basket 31 containing solid insoluble matter, and a stirring device 32 is provided at the bottom.

[0088] The anode chamber 1 is also provided with a first pure water injection port 12, a first waste liquid discharge port 13, a first waste gas collection device 14; the cathode chamber 2 is also provided with a second pure water injection port 22, a second waste Liquid disc...

Embodiment 2

[0093] A process for removing impurities from ionic impurities in chemical precipitation, which is beneficial to the above-mentioned devices (such as Figure 7 shown), including the following steps:

[0094] 1) Before electrolysis: put the solid product produced in the chemical synthesis in the material blue 31 in the material chamber, and inject a sufficient amount of pure water into the anode chamber 1, the cathode chamber 2 and the material chamber 3, at this time, the material blue It is also soaked in water, and the soluble ions attached to the surface of the solid product are fully dissolved in pure water under stirring;

[0095] 2) Electrolysis: Under the action of the electrode, the anion is electrolyzed into gas at the anode through the anion membrane, and the gas is recovered, and the cation is electrolyzed into metal and alkali metal or precipitated at the cathode through the anion membrane, and the electrolysis is terminated when hydrogen gas is generated at the c...

Embodiment 3

[0098] A comprehensive utilization method for extracting valuable elements chromium, silicon, iron, magnesium, aluminum and nickel by acid dissolution of chromite, the specific process steps are as follows:

[0099] 1) Chromite ore processing (see attached figure 1 )

[0100] After the chromite ore is mined, it is crushed and ball milled into a powder with a particle size of less than 100 microns, placed in an electrode oxidation tank, and water is added to the ore powder to keep the water content of the ore powder at 10wt%-15wt%, so that the ore powder is moist and the electrode is oxidized Air is blown into the bottom of the tank;

[0101] 2) acid soluble (see attached figure 2 )

[0102] Mineral powder is placed in a high-temperature and high-pressure reactor to react with 50wt%-70wt% sulfuric acid solution, wherein the amount of sulfuric acid added is: the mass ratio of mineral powder to sulfuric acid is 1:2 to 1:3, and the temperature of the reactor is 120 ° C ~ 20...

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Abstract

The invention discloses a comprehensive utilization method for acid dissolution extraction of valuable element chromium silicon iron magnesium aluminum nickel from chromite, first the chromite is crushed and ground into micro powder, the micro powder is blew with air for oxidation at the bottom of an electrode oxidation pool for oxidation of ferrous ion into iron ion; chrome spinel lattice is destructed, the oxidized chromite micro powder is reacted with sulfuric acid in a high temperature high pressure reaction kettle to produce a mixed liquid containing chromium sulfate, magnesium sulfate, aluminum sulfate, ferric sulfate and nickel sulfate and a deposit mainly comprising silicon dioxide and insoluble minerals under the oxidation-catalyst effect; after solid-liquid separation, a solid is again purified to obtain white carbon black; and chromium sulfate hexahydrate, high purity magnesium hydroxide, high purity aluminum hydroxide, high purity ferrous oxalate and nickel sulfide can be obtained by liquid fractional extraction of liquid phase. All the valuable elements, acids, alkalis, water and other raw materials can be extracted for cyclic utilization after front oxidation and high temperature and high pressure acid dissolution of the chromite ore powder.

Description

technical field [0001] The invention relates to comprehensive mining and utilization of chromite, belonging to the field of inorganic chemistry. Background technique [0002] Chromite is a mineral mainly composed of oxides of iron, aluminum, magnesium and chromium: (Fe, Mg)Cr2O4, a type of spinel. It is the only mineable chromium ore and has a complex mineral composition with variable magnesium and sometimes aluminum and iron elements. There are about 30 kinds of chromium-containing minerals in nature, but only chromite has industrial value. The common ones in China are chromite, aluminum chromite and chromium-rich spinel. [0003] Chromite in the market is generally divided into 3 categories according to the use requirements [0004] (1) High-chromium chromite (for metallurgy), containing more than 48% Cr2O3, with a large ratio of Cr2O3 / FeO. Chromite is mainly used to produce ferrochromium and metallic chromium [0005] (2) High-iron chromite (for chemical industry), c...

Claims

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Application Information

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IPC IPC(8): C25C7/00C01B33/12C01G37/00C01G53/11C01F5/14C01F7/02
Inventor 于志远
Owner 于志远
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