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A kind of flotation method of carbonate mineral

A carbonate mineral, grinding technology, applied in flotation, solid separation and other directions, can solve problems such as difficulty and poor selectivity of collectors

Inactive Publication Date: 2011-12-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of difficult mineral adsorption on air bubbles and poor selectivity of collectors, the present invention provides a flotation method for carbonate minerals. Bubbles are attached to the bridge between the ore particles and the large air bubbles to adsorb the ore particles to float up, and the following technical solutions are used to achieve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A certain zinc oxide ore in Yunnan was taken through screening, crushing, counter-rolling, and mixing, and the particle size of the ore was -1mm. Observed with the naked eye, most of the ores are light yellowish brown, yellowish white, soil-like, porous, and shell-like, and crystal clusters grow in the pores of smithsonite, hemimorphite and other ores. Shaped structure, shell-like structure, and cluster-like structure; the structure of ore is mainly granular, plate-like, bundle-like, and radial flower-like. Through microscope observation, artificial heavy sand analysis, and X-ray analysis, there are carbonates, silicates, arsenates, oxides, sulfates, sulfides and other minerals in the ore, of which carbonates account for the main part. The ore is zinc oxide ore with an oxidation rate of over 94%. The zinc mineral composition in the ore is complex, mainly in the form of smithsonite, hemimorphite and sphalerite, and the other zinc minerals are only about 3.9%. The gangue...

Embodiment 2

[0019] Taking the iron in the ore in a certain area of ​​Yunnan, the iron grade of the original ore is 31.68%; the occurrence state of iron is more complicated, mainly siderite, whose distribution rate is 80.40%, followed by pyrite, accounting for 10.80% of the TFe content. Other iron minerals are difficult to recover due to their low content.

[0020] Grind 1 ton of the ore to -200 mesh, accounting for 70%, adjust the mass percentage concentration of the flotation pulp to 20%, add a hydrochloric acid solution with a concentration of 1mol / L until the pH of the pulp is 2, and add a collector Tal oil 100g, dixanthate 60g, add foaming agent No. 4 oil 10g, keep the stirring intensity at 60 rpm, and after conventional roughing, selection, and sweeping, iron concentrate is obtained, and its grade reaches 46 %, the recovery rate is close to 85%. Compared with the results obtained by using amine collectors after conventional sulfidation, the concentrate grade has increased by about 10...

Embodiment 3

[0022] Take a certain magnesite ore, MgO content is 44.7%, SiO 2 The content is 2.31%.

[0023] Grind 1 ton of the ore to -200 mesh, accounting for 83%, adjust the mass percentage concentration of the flotation pulp to 40%, add acetic acid solution with a concentration of 5mol / L until the pH value of the pulp is 5, and add a collector Dodecylamine 400g, add foaming agent pine oil 200g, keep stirring intensity at 80 rpm, and then through conventional roughing, selection, and sweeping, get magnesite concentrate, its grade reaches MgO content of 47.7% , SiO 2 The content is 0.14%, and the recovery rate reaches 84.2%.

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PUM

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Abstract

The invention provides a flotation method for carbonate minerals. The method comprises the following steps of: grinding, roughing, sifting and scavenging, namely after grinding, regulating the mass percentage concentration of flotation mineral slurry to 10 to 30 percent, adding acidic solution with the concentration of 0.01 to 5 mol / L until the pH value of the mineral slurry ranges from 0.1 to 5,adding a collecting agent in amount which is 0.002 to 0.05 percent of mineral solids in the mineral slurry, adding a foaming agent in amount which is 0.001 to 0.02 percent of mineral solids in the mineral slurry, stirring at a speed of between 30 and 120 revolutions / minute, and roughing, sifting and scavenging conventionally to obtain concentrates. In the flotation method, due to the addition of sulfuric acid, carbon dioxide microbubbles generated by reacting carbonates with the sulfuric acid are adsorbed to the surfaces of the minerals, so that mineral granules are adsorbed to float upwards under the bridging action of the microbubbles attached between the mineral granules and big bubbles. By the method, the using amount of the collecting agent and the foaming agent is reduced, the concentrate grades are improved by the selective adsorption of the bubbles, a process flow is simplified, and a high assorting index can be reached only by assorting once.

Description

technical field [0001] The invention relates to a carbonate mineral flotation method, which belongs to the technical field of mineral processing. Background technique [0002] With the development of our country's social economy and the acceleration of industrialization and urbanization, there are more and more mineral types and their requirements are getting higher and higher. At present, there are more than 100 known carbonate minerals, which are widely distributed in the earth's crust, accounting for about 1.7% of the total amount of the earth's crust. The minerals are mainly carbonates of calcium and magnesium. Carbonate minerals are important mineral raw materials, and are also an important source of mineral raw materials for extracting Fe, Mg, Mn, Zn, Cu and other metal elements, as well as radioactive elements Th, U and rare earth elements, and have important economic significance. At present, the carbonate minerals mainly involved in flotation are siderite, calcite,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/02
Inventor 邓荣东刘全军
Owner KUNMING UNIV OF SCI & TECH
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