Selective flotation separation method for fluorite and calcium-containing gangue
A separation method and selective technology, which is applied in the field of chemicals for selectively collecting fluorite, can solve the problems of poor flotation selectivity and low flotation recovery rate of target minerals, and achieve improved recovery rate, good flotation separation effect, Effect of excellent flotation selectivity and recovery
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Embodiment 1
[0061] 0.3mol of C 11 h 23 COOH (dodecanoic acid) joins in the reaction vessel, then according to molar ratio 1:1.3 (C 11 h 23 COOH:SOCl 2 ) SOCl 2 Slowly drop in, control the reaction temperature at 65°C, the reaction time is 3h, and keep stirring, after the reaction is complete, raise the temperature of the obtained liquid to 79°C to recover SOCl 2 , distilled for 2h and then heated to 150°C to continue purification for 1.5h. The resulting sample was then removed, with After mixing according to the mass ratio of 1:1.3, add it to the ethanol-water solution, and stabilize the pH of the reaction system at about 10.2 with a mixture of sodium carbonate and sodium hydroxide at a molar ratio of 10:1.5, stir for 4 hours, and then heat the liquid to 78 Collect ethanol at ℃, add dilute hydrochloric acid to adjust the pH of the solution to 2 after 1h, and after the solution is separated at room temperature, wash the layered oil with deionized water for 2 to 3 times for purificat...
Embodiment 2
[0064] The collector preparation process is the same as in Example 1. In this example, a fluorite mine in Henan was used as raw material, and CaF in the sample 2 Grade 29.71%, CaCO 3 Grade 5.05%, P 2 o 5 Grade 2.68%. In addition to calcite and apatite, gangue minerals also include feldspar, montmorillonite, and pyroxene. The specific sorting process is as follows: crush the raw fluorite ore, and use a ball mill to grind the ore to a fineness of -0.074mm, which accounts for 72% of the raw ore quality; the solid content of the pulp is 43%; and then add sodium carbonate to the prepared pulp. Adjust the pH to 9.2, and then add 100g of the prepared collector per ton, stir for 3 minutes, and then aerate for 5 minutes, and the amount of aeration is 0.3m 3 / h; The fluorite crude concentrate obtained by roughing is then subjected to four times of beneficiation, in which the amount of collectors for the first and second concentrates is 35g and 15g per ton respectively, and the thir...
Embodiment 3
[0066] The collector preparation process is the same as in Example 1. In this example, a fluorite mine in Hunan is used as raw material, and the CaF in the sample 2 Grade 25.41%, CaCO 3 Grade 20.14%, P 2 o 5 The grade is 1.95%. The gangue minerals are mainly calcite, in addition to garnet, mica, feldspar, epidote and so on. The specific sorting process is as follows: crush the raw fluorite ore, and use a ball mill to grind the ore to a fineness of -0.074mm, which accounts for 67% of the raw ore quality; the solid content of the pulp is 35%; and then add sodium carbonate to the prepared pulp. Adjust the pH to 9, then add 90g of the prepared collector per ton, stir for 3 minutes, and then perform air flotation for 5 minutes. 3 / h; The fluorspar rough concentrate obtained by roughing is then subjected to four times of beneficiation, among which the amount of collectors for Jing 1, Jing 2 and Jing 3 is 30g, 15g and 5g per ton respectively, and Jing 4 is blank selection . Sw...
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