Mineral-floating foaming agent and its prepn

Abstract

The present invention proposes one kind of mineral-floating foaming agent and its preparation. The foaming agent contains alcohol with branch chain and epoxy ethane and / or epoxy propane in the weight ratio of 1 to 1-6, and the alcohol with branched chain may be isopropyl alcohol, isobutyl alcohol or isoamyl alcohol. It is prepared through mixing alcohol with branched chain and epoxy ethane and / or epoxy propane, adding oxide of K or Na in 0.3-1% of material weight as catalyst, reaction at 0.01-1.2 MPa pressure and 170-190 deg.c temperature for 2-3 hr, decreasing the pressure to nomral pressure, cooling to below 50 deg.c and filtering. The foaming agent is water soluble, good in dispersivity, great in formed foam, favorable to secondary enrichment and recovery of fine mineral and has no environmental pollution.

Description

Technical field [0001] The invention relates to a foaming agent selected for mineral floatation and its preparation technology. Background technique [0002] In order to effectively separate useful minerals from gangue minerals, in flotation technology, foaming agents are often used to generate a large amount of foam and form a large amount of liquid-gas interface. When useful minerals are enriched and float on the liquid-gas interface and separate from the gangue, it is called flotation. When gangue minerals are enriched and float on the liquid-gas interface, and useful minerals do not float, it is called reverse flotation. [0003] Flotation has strict requirements on the size, brittleness, toughness, and strength of the foam, and it does not only need to be foamed. Under normal circumstances, coarse particle flotation requires large bubbles, and fine particle flotation requires micro bubbles. The brittleness and toughness should also be moderate. If the foam is too brittle, it...

AI Technical Summary

Problems solved by technology

There are many defects in the terpineol foaming agent. For example, in the flotation of copper oxide with high mud content and cationic reverse flotation of some oxidized ores, it is difficult to defoam due to the high viscosity of the foam produced by it, which leads to run-off and affects The production is going on normally, and its dosage is correspondingly increased. At the same time, the smell of terpineol is very strong, which affects human health.

Terpineol discharged with tailings has poor biodegradability and pollutes aquatic organisms and the environment

Judging from the characteristics of the flotation process, the foam produced by terpineol is medium-sized, with less microbubbles, which is not conducive to the attachment of fine-grained ore, and the recovery rate of fine-grained particles is low

[0006] In recent years, some chemical by-products are also used, most of which are some mixtures, often because of the unstable composition of such substances, large fluctuations in foaming performance, and adverse effects on flotation indicators during production