Method for full-particle size flotation of slime-containing lepidolite ore

A method for full-particle size flotation of slime-containing lepidolite ore, comprising the following steps:

• (1) thoroughly mixing a compound regulator and the slime-containing lepidolite ore, subjecting an obtained mixture to ball milling until a lepidolite is liberated, and adding water and conditioning until a concentration of an obtained pulp reaches 32% to 42% by mass, to obtain a slime-containing lepidolite ore pulp, wherein a mass percentage content of Li2O in the slime-containing lepidolite ore is in a range of 0.26% to 0.64%, and in terms of each ton of the slime-containing lepidolite ore, 200 g to 400 g of the compound regulator is added to a ball mill;
• (2) adding a compound inhibitor and a compound collector in sequence to the slime-containing lepidolite ore pulp obtained in step (1), and conducting a primary rougher to obtain a primary rougher concentrate and a primary rougher tailing, wherein in terms of each ton of the slime-containing lepidolite ore, 400 g to 800 g of the compound inhibitor and 240 g to 360 g of the compound collector are added for conducting the primary rougher;
• (3) adding the compound inhibitor and the compound collector in sequence to the primary rougher tailing obtained in step (2), and conducting a secondary rougher to obtain a secondary rougher concentrate and a secondary rougher tailing;
• (4) adding the compound inhibitor and the compound collector in sequence to the secondary rougher tailing obtained in step (3), and conducting scavenger to obtain a scavenger concentrate and a scavenger tailing, wherein the scavenger concentrate is conditioned and returned to the secondary rougher;
• (5) combining the primary rougher concentrate obtained in step (2) and the secondary rougher concentrate obtained in step (3) to obtain a mixed rougher concentrate, adding the compound inhibitor to the mixed rougher concentrate, and conducting a primary cleaner to obtain a primary cleaner concentrate and a primary cleaner tailing, wherein the primary cleaner tailing is conditioned and returned to the secondary rougher;
• (6) subjecting the primary cleaner concentrate obtained in step (5) to a secondary cleaner to obtain a secondary cleaner concentrate and a secondary cleaner tailing, wherein the secondary cleaner tailing is conditioned and returned to the primary cleaner;
• and
• (7) regarding the secondary cleaner concentrate obtained in step (6) as a lithium flotation concentrate, while regarding the scavenger tailing obtained in step (4) as a lithium flotation tailing;
• wherein
• the compound regulator is a mixture of triethanolamine (TEA) and TEA dodecylbenzenesulfonate, wherein taking a mass of the compound regulator as 100%, the TEA accounts for 60% to 80% and the TEA dodecylbenzenesulfonate accounts for 20% to 40%;
• the compound inhibitor is a mixture of a phosphonocarboxylic acid copolymer, aminotrimethylene phosphonic acid (ATMP), and sodium carbonate, wherein taking a mass of the compound inhibitor as 100%, the phosphonocarboxylic acid copolymer accounts for 10% to 30%, the ATMP accounts for 20% to 40%, and the sodium carbonate accounts for 40% to 60%;
• and
• the compound collector is a mixture of dodecylamine acetate, sodium coco sulfate (SCS), and disodium lauryl sulfosuccinate (DLS), wherein taking a mass of the compound collector as 100%, the dodecylamine acetate accounts for 35% to 45%, the SCS accounts for 40% to 50%, and the DLS accounts for 10% to 20%.