Bauxite direct flotation composite collector and application method thereof

Abstract

The invention discloses a collector for bauxite direct flotation desilicification and an application method of the collector. The collector is characterized by comprising the chemical component of a mixture of monocarboxyl fatty acid, an organosilicon surfactant, a polyoxyethylene ether surfactant and a mining foaming agent, wherein the compounding mass percents of the monocarboxyl fatty acid, the organosilicon surfactant, the polyoxyethylene ether surfactant and the mining foaming agent are 70-80%, 5-10%, 5-10% and 10-20% respectively. The collector has the obvious advantages that by adding the surfactants without collecting ability, the dispersing performance of the fatty acid collector is improved, the collecting performance of the fatty acid collector is improved, recovery of aluminum oxide is improved, and the use quantity of medicaments is reduced; on the condition of not conducting desliming, the flotation effect of diaspore bauxite with a medium and low alumina-silica ratio (2.5-5) is prominent.

Description

technical field [0001] The invention belongs to the field of mineral processing, and relates to a bauxite positive flotation composite collector and an application method thereof. Background technique [0002] More than 90% of my country's alumina resources belong to diaspore bauxite. After the last ten years of predatory mining, my country's bauxite resources have been severely depleted and depleted. The aluminum-silicon ratio of raw ore in alumina plants has been decreasing year by year. By 2012, the ratio of aluminum to silicon in alumina plants in my country will basically remain between 2.5 and 5. Since 2003, Aluminum Corporation of China Zhongzhou Branch adopted the new technology of bauxite beneficiation and desiliconization-Bayer method to produce alumina, and more than 80% of the medium and low-grade bauxite in my country can be processed by this method. Compared with other methods, the Bayer method has lower energy consumption, but requires the aluminum-silicon ra...

AI Technical Summary

Problems solved by technology

Fatty acid collectors have poor dispersibility, low temperature and hard water resistance, and strong foaming performance are the main reasons for the large use of fatty acid collectors

[0004] With the large-scale mining of bauxite, the bauxite with high aluminum-silicon ratio is almost exhausted, and the development and utilization of low-aluminum-silicon ratio bauxite is the general trend. Ridge stone, illite pyrophyllite and other friable aluminosilicate minerals are high in content, and aluminosilicate minerals are easy to muddy during the grinding process. large amount

In addition, a small amount of hydroxamic acid is added to general bauxite flotation reagents to enhance the flotation effect, while hydroxamic acid collectors have certain physiological toxicity, and are not easy to decompose in the natural state, and rich in water The assembly causes eutrophication of the water body and cannot be discharged directly, which increases the difficulty of wastewater treatment and increases the cost of wastewater establishment

At present, due to some factors such as overcapacity, the alumina industry has entered the era of meager profits. The reduction of ore quality and the problems of existing collectors have increased the cost of beneficiation, and at the same time increased the cost of subsequent concentrate treatment. Cost issues have become restrictions on mining. Important Factors for Utilizing Low Al-Si Ratio Bauxite

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