Reverse flotation composite collector of phosphate rock a layer ore and preparation method thereof
A composite collector and reverse flotation technology, used in flotation, solid separation and other directions, can solve the problems of small selection range, low selection and low beneficiation efficiency, and achieve improved selectivity and good collection effect. , Flotation effect is good
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[0048] The present invention also provides a preparation method of the above-mentioned phosphate rock a-layer ore reverse flotation composite collector, comprising the following steps:
[0049] a. Amines react with inorganic acids, adjust pH to make collectors;
[0050] b. Fatty acid or fatty acid-containing vegetable oil is mixed with ammonia water, a catalyst is added, and the reaction is made into a synergist;
[0051] c. Compounding according to the ratio of collector: synergist: regulator=5~7:2~4:1~2 to make a composite collector; the regulator is phenylphosphonic acid.
[0052] The inventor of the present invention has studied the flotation process of phosphate rock for a long time, and according to the research on the properties of various components in the phosphate rock and the flotation mechanism, he found that the phosphorus mineral (fluorapatite) in the a-layer ore of the phosphate rock Under positive flotation conditions, the flotation difference with siliceous g...
Embodiment 1
[0063] Embodiment 1 adopts the composite collector of the present invention to carry out flotation of a-layer phosphate rock
[0064] Use tetradecyldimethylamine and 40% dilute nitric acid in a molar ratio of 1:1.2, stir for 1 hour, and slowly add 10% Na dropwise 2 CO 3 To pH 5.5, cool and filter to obtain base collector 1.
[0065] Soybean oil was added into ammonia water with a concentration of 20%, catalyst was added, the reaction temperature was 50°C, the reaction was stirred for 3 hours, then cooled to 5°C, and the synergist 1 was obtained by filtration.
[0066] Prepare 1# composite collector, mix according to the mass ratio: collector 1: synergist 1: phenylphosphonic acid = 7:2:1, add water to prepare 1# composite collector with a concentration of 2% solution.
[0067] Add 1000g of mineral powder in Table 1, add water to adjust the solid content to 25%, add phosphoric acid to adjust the pH of the pulp to 5.2, add 700g / t ore of 1# composite collector, go through one c...
Embodiment 2
[0068] Embodiment 2 adopts the composite collector of the present invention to carry out flotation of a-layer phosphate rock
[0069] Use N-methyldiphenylamine and 50% dilute sulfuric acid in a molar ratio of 1:1.2, stir for 1 hour, and then slowly add 10% Na dropwise 2 CO 3 To pH 6, cool and filter to obtain base collector 2.
[0070] Add linoleic acid into ammonia water with a concentration of 20%, add catalyst, react at a reaction temperature of 50° C., stir and react for 3 hours, then cool to 5° C. and filter to obtain synergist 2.
[0071] Prepare 2# composite collector, mix according to the mass ratio: collector 2: synergist 2: phenylphosphonic acid = 6:3:1, add water to prepare 2# composite collector with a concentration of 2% solution.
[0072] With the mineral powder of table 1, add phosphoric acid and demagnesia collector first to carry out reverse separation demagnesia, and obtain demagnesia concentrate index: by mass percentage, P 2 O 5 : 27.51%, CaO: 42.48%, ...
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