A method for optimizing feldspar and quartz from tantalum-niobium ore

Abstract

The invention relates to a method for optimizing feldspar and quartz in tantalum-niobium ores. The method comprises the technological processes of tantalum-niobium ore tailing reselecting, efficient desliming, lepidolite flotation and feldspar flotation in sequence, and quartz concentrate is obtained by feldspar tailing flotation. According to the fluoride-free beneficiation method, the feldspar recovery rate in tantalum-niobium ore reselected tailings can be at least 85%, the content of feldspar concentrate K2O and Na2O is at least 9%, the quartz recovery rate is at least 90%, the content of quartz concentrate SiO2 is at least 98%, a traditional extensive form mineral processing technology is changed, fluoride-free environment-protecting efficient development and utilization of tantalum-niobium ore resources of China are achieved, the economic benefit of tantalum-niobium ores is greatly improved, and the method is especially suitable for optimizing feldspar and quartz in low-grade tantalum-niobium ores.

Description

technical field [0001] The invention relates to ore dressing technology, in particular to a method for optimizing feldspar and quartz from tantalum-niobium ore. [0002] technical background [0003] At present, most of the gangue minerals in my country's tantalum-niobium deposits are silicate minerals such as feldspar, quartz, and mica. Traditional tantalum-niobium ore gravity separation tailings generally recover lepidolite, feldspar, quartz, etc., tantalum, niobium ore, etc. The ore gravity separation tailings enter the lepidolite flotation operation after desliming. As far as lepidolite flotation is concerned, lepidolite is the main target mineral, and the tailings products are mainly quartz and feldspar minerals. [0004] With the growth of social demand, the development of low-grade tantalum-niobium ore is also increasing, and the traditional extensive beneficiation process is no longer suitable for this type of ore. Especially with the improvement of the quality requir...

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Problems solved by technology

[0004] With the growth of social demand, the development of low-grade tantalum-niobium ore is also increasing, and the traditional extensive beneficiation process is no longer suitable for this type of ore

Especially with the improvement of the quality requirements of feldspar products in the glass and ceramic industries, most mines do not separate feldspar and quartz in the traditional tantalum-niobium ore beneficiation process, and the mixed concentrates of feldspar and quartz are collectively called feldspar powder , whose K 2 O+Na 2 The O grade is only 5-7%, which restricts the benefits of tantalum and niobium mines

[0005] Commonly used methods for feldspar and quartz separation in individual mines include hydrofluoric acid method, anion and cation method, fluorine-free and acid-free method, etc., all of which have certain deficiencies: the hydrofluoric acid method has high beneficiation efficiency and good product quality, but The pollution to the environment is serious; the mineral processing efficiency of the anion and cation method is obviously low, and the dosage of the medicament is large, and the product quality is poor; the fluorine-free and acid-free method is still in the experimental research stage, and its mineral processing indication is unstable

[0006] At present, the hydrofluoric acid method is relatively mature in industry, and its beneficiation process is as follows: figure 1 As shown, due to the requirements of environmental protection, the treatment cost of hydrofluoric acid is very high, and the application is limited.

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