Method for froth-controlled flotation of argillaceous lepidolite ore

Abstract

A method for froth-controlled flotation of argillaceous lepidolite ore, including: crushing and grinding an ore, adding water to obtain pulp; adding agents thereto, and conducting roughing to obtain roughing concentrate and roughing tailing; adding agents to the roughing tailing, and conducting first scavenging to obtain first scavenging concentrate and first scavenging tailing; subjecting the first scavenging tailing to second scavenging to obtain second scavenging concentrate and second scavenging tailing; adding agents to the roughing concentrate, conducting first cleaning to obtain first cleaning concentrate and first cleaning tailing; subjecting the first cleaning concentrate to second cleaning to obtain lithium concentrate I and second cleaning tailing; combining the first scavenging concentrate, second scavenging concentrate, first cleaning tailing, and second cleaning tailing to obtain lithium-containing mixed middling, adding agents thereto, and conducting cleaning-scavenging to obtain lithium concentrate II and cleaning-scavenging tailing; and combining the lithium concentrate I and lithium the concentrate II.

Claims

1. A method for froth-controlled flotation of argillaceous lepidolite ore, comprising the following steps: (1) crushing and grinding a lepidolite ore until a lepidolite monomer is dissociated, and adding water to obtain a pulp having a concentration of 29% to 37% by mass; (2) adding a depressant, a collector, and a froth control agent in sequence to the pulp obtained in step (1), and conducting roughing to obtain a roughing concentrate and a roughing tailing; (3) adding the depressant, the collector, and the froth control agent in sequence to the roughing tailing obtained in step (2), and conducting first scavenging to obtain a first scavenging concentrate and a first scavenging tailing; (4) subjecting the first scavenging tailing obtained in step (3) to second scavenging to obtain a second scavenging concentrate and a second scavenging tailing, the second scavenging tailing being a flotation tailing; (5) adding the depressant, the collector, and the froth control agent in sequence to the roughing concentrate obtained in step (2), and conducting first cleaning to obtain a first cleaning concentrate and a first cleaning tailing; (6) subjecting the first cleaning concentrate obtained in step (5) to second cleaning to obtain lithium concentrate I and a second cleaning tailing; (7) combining the first scavenging concentrate obtained in step (3), the second scavenging concentrate obtained in step (4), the first cleaning tailing obtained in step (5), and the second cleaning tailing obtained in step (6) to obtain a lithium-containing mixed middling, adding the collector and the froth control agent in sequence to the lithium-containing mixed middling, and conducting cleaning-scavenging to obtain lithium concentrate II and a cleaning-scavenging tailing, wherein the cleaning-scavenging tailing is recycled to the second scavenging in step (4); and (8) combining the lithium concentrate I obtained in step (6) and the lithium concentrate II obtained in step (7) to obtain a lithium concentrate product, wherein the depressant is a mixture of sodium carbonate and a water glass, the collector is a mixture of laurylamine, sodium lauryl sulfonate, and ethanol, and the froth control agent is a mixture of diesel oil, a polyether, and tributyl phosphate.

2. The method for the froth-controlled flotation of the argillaceous lepidolite ore according to claim 1, wherein in step (1), a mass percentage content of Li.sub.2O in the argillaceous lepidolite ore is in a range of 0.38% to 0.74%.

3. The method for the froth-controlled flotation of the argillaceous lepidolite ore according to claim 1, wherein in terms of each ton of the argillaceous lepidolite ore, 550 g to 850 g of the depressant, 360 g to 520 g of the collector, and 180 g to 260 g of the froth control agent are added for conducting the roughing in step (2).

4. The method for the froth-controlled flotation the argillaceous lepidolite ore according to claim 1, wherein in terms of each ton of the argillaceous lepidolite ore, 250 g to 350 g of the depressant, 90 g to 130 g of the collector, and 45 g to 65 g of the froth control agent are added for conducting the first scavenging in step (3).

5. The method for the froth-controlled flotation the argillaceous lepidolite ore according to claim 1, wherein in terms of each ton of the argillaceous lepidolite ore, 150 g to 250 g of the depressant, 55 g to 85 g of the collector, and 60 g to 80 g of the froth control agent are added for conducting the first cleaning in step (5).

6. The method for the froth-controlled flotation the argillaceous lepidolite ore according to claim 1, wherein in terms of each ton of the argillaceous lepidolite ore, 40 g to 60 g of the collector and 50 g to 70 g of the froth control agent are added for conducting the cleaning-scavenging in step (7).

7. The method for the froth-controlled flotation the argillaceous lepidolite ore according to claim 1, wherein taking a mass of the depressant as 100%, the sodium carbonate accounts for 55% to 65% and the water glass accounts for 35% to 45%; taking a mass of the collector as 100%, the laurylamine accounts for 30% to 40%, the sodium lauryl sulfonate accounts for 25% to 35%, and the ethanol accounts for 30% to 40%; and taking a mass of the froth control agent as 100%, the diesel oil accounts for 45% to 55%, the polyether accounts for 25% to 35%, and the tributyl phosphate accounts for 15% to 25%.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) FIGURE is a process flow chart according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(2) The present disclosure will be further described in detail below in conjunction with specific examples, but the scope of the present disclosure is not limited thereto.

(3) In the following examples of the present disclosure, a depressant is a mixture of sodium carbonate and sodium silicate, a collector is a mixture of laurylamine, sodium lauryl sulfonate, and ethanol, and a froth control agent is a mixture of diesel oil, a polyether, and tributyl phosphate.

Example 1

(4) In this example, tacking a mass of the depressant as 100%, the sodium carbonate accounted for 55% and the sodium silicate accounted for 45%; tacking a mass of the collector as 100%, the laurylamine accounted for 30%, the sodium lauryl sulfonate accounted for 30%, and the ethanol accounted for 40%; and tacking a mass of the froth control agent as 100%, the diesel oil accounted for 45%, the polyether accounted for 35%, and the tributyl phosphate accounted for 20%.

(5) As shown in FIGURE, a method for froth-controlled flotation of argillaceous lepidolite ore was performed as follows: (1) The argillaceous lepidolite ore was crushed and ground until a lepidolite monomer was dissociated, and water was then added thereto to obtain a pulp with a concentration of 29% by mass, where a mass percentage content of Li.sub.2O in the argillaceous lepidolite ore was 0.38%. (2) The depressant, the collector, and the froth control agent were added in sequence to the pulp obtained in step (1), and a resulting pulp mixture was subjected to roughing to obtain a roughing concentrate and a roughing tailing, where in terms of each ton of the argillaceous lepidolite ore, 550 g of the depressant, 360 g of the collector, and 180 g of the froth control agent were added to the pulp for the roughing. (3) The depressant, the collector, and the froth control agent were added in sequence to the roughing tailing obtained in step (2), and a resulting mixture was subjected to first scavenging to obtain a first scavenging concentrate and a first scavenging tailing, where in terms of each ton of the argillaceous lepidolite ore, 250 g of the depressant, 90 g of the collector, and 45 g of the froth control agent were added to the roughing tailing for the first scavenging. (4) The first scavenging tailing obtained in step (3) was subjected to second scavenging to obtain a second scavenging concentrate and a second scavenging tailing, where the second scavenging tailing was a flotation tailing. (5) The depressant, the collector, and the froth control agent were added in sequence to the roughing concentrate obtained in step (2), and a resulting mixture was subjected to first cleaning to obtain a first cleaning concentrate and a first cleaning tailing, where in terms of each ton of the argillaceous lepidolite ore, 150 g of the depressant, 55 g of the collector, and 60 g of the froth control agent were added to the roughing concentrate for the first cleaning. (6) The first cleaning concentrate obtained in step (5) was subjected to second cleaning to obtain lithium concentrate I and a second cleaning tailing. (7) The first scavenging concentrate obtained in step (3), the second scavenging concentrate obtained in step (4), the first cleaning tailing obtained in step (5), and the second cleaning tailing obtained in step (6) were combined to obtain a lithium-containing mixed middling, and the collector and the froth control agent were added in sequence to the lithium-containing mixed middling. A resulting mixture was subjected to cleaning-scavenging to obtain lithium concentrate II and a cleaning-scavenging tailing, where the cleaning-scavenging tailing was recycled to the second scavenging in step (4). In terms of each ton of the argillaceous lepidolite ore, 40 g of the collector and 50 g of the froth control agent were added to the lithium-containing mixed middling for the cleaning-scavenging. (8) The lithium concentrate I obtained in step (6) and the lithium concentrate II obtained in step (7) were combined to obtain a lithium concentrate product.

(6) In this example, a flotation recovery of lithium is 85.1%.

Example 2

(7) In this example, tacking a mass of the depressant as 100%, the sodium carbonate accounted for 60% and the sodium silicate accounted for 40%; tacking a mass of the collector as 100%, the laurylamine accounted for 35%, the sodium lauryl sulfonate accounted for 35%, and the ethanol accounted for 30%; tacking a mass of the froth control agent as 100%, the diesel oil accounted for 50%, the polyether accounted for 25%, and the tributyl phosphate accounted for 25%.

(8) As shown in FIGURE, a method for froth-controlled flotation of argillaceous lepidolite ore was performed as follows: (1) The argillaceous lepidolite ore was crushed and ground until a lepidolite monomer was dissociated, and water was then added thereto to prepare a pulp with a concentration of 33% by mass, where a mass percentage content of Li.sub.2O in the argillaceous lepidolite ore was 0.56%. (2) The depressant, the collector, and the froth control agent were added in sequence to the pulp obtained in step (1), and a resulting pulp mixture was subjected to roughing to obtain a roughing concentrate and a roughing tailing. For each ton of the argillaceous lepidolite ore, 700 g of the depressant, 440 g of the collector, and 220 g of the froth control agent were added to the pulp for the roughing. (3) The depressant, the collector, and the froth control agent were added in sequence to the roughing tailing obtained in step (2), and a resulting mixture was subjected to first scavenging to obtain a first scavenging concentrate and a first scavenging tailing. For each ton of the argillaceous lepidolite ore, 300 g of the depressant, 110 g of the collector, and 55 g of the froth control agent were added to the roughing tailing for the first scavenging. (4) The first scavenging tailing obtained in step (3) was subjected to second scavenging to obtain a second scavenging concentrate and a second scavenging tailing, where the second scavenging tailing was a flotation tailing. (5) The depressant, the collector, and the froth control agent were added in sequence to the roughing concentrate obtained in step (2), and a resulting mixture was subjected to first cleaning to obtain a first cleaning concentrate and a first cleaning tailing. For each ton of the argillaceous lepidolite ore, 200 g of the depressant, 70 g of the collector, and 70 g of the froth control agent were added to the roughing concentrate for the first cleaning. (6) The first cleaning concentrate obtained in step (5) was subjected to second cleaning to obtain lithium concentrate I and a second cleaning tailing. (7) The first scavenging concentrate obtained in step (3), the second scavenging concentrate obtained in step (4), the first cleaning tailing obtained in step (5), and the second cleaning tailing obtained in step (6) were combined to obtain a lithium-containing mixed middling, and the collector and the froth control agent were added in sequence to the lithium-containing mixed middling. A resulting mixture was subjected to cleaning-scavenging to obtain a lithium concentrate II and a cleaning-scavenging tailing, where the cleaning-scavenging tailing was recycled to the second scavenging in step (4). For each ton of the argillaceous lepidolite ore, 50 g of the collector and 60 g of the froth control agent were added to the lithium-containing mixed middling for the cleaning-scavenging. (8) The lithium concentrate I obtained in step (6) and the lithium concentrate II obtained in step (7) were combined to obtain a lithium concentrate product.

(9) In this example, a flotation recovery of lithium is 86.8%.

Example 3

(10) In this example, tanking a mass of the depressant as 100%, the sodium carbonate accounted for 65% and the water glass accounted for 35%; tacking a mass of the collector as 100%, the laurylamine accounted for 40%, the sodium lauryl sulfonate accounted for 25%, and the ethanol accounted for 35%; tacking a mass of the froth control agent as 100%, the diesel oil accounted for 55%, the polyether accounted for 30%, and the tributyl phosphate accounted for 15%.

(11) As shown in FIGURE, a method for froth-controlled flotation of argillaceous lepidolite ore was performed as follows: (1) The argillaceous lepidolite ore was crushed and ground until a lepidolite monomer was dissociated, and water was then added thereto to prepare a pulp with a concentration of 37% by mass, where a mass percentage content of Li.sub.2O in the argillaceous lepidolite ore was 0.74%. (2) The depressant, the collector, and the froth control agent were added in sequence to the pulp obtained in step (1), and a resulting pulp mixture was subjected to roughing to obtain a roughing concentrate and a roughing tailing. For each ton of the argillaceous lepidolite ore, 850 g of the depressant, 520 g of the collector, and 260 g of the froth control agent were added to the pulp for the roughing. (3) The depressant, the collector, and the froth control agent were added in sequence to the roughing tailing obtained in step (2), and a resulting mixture was subjected to first scavenging to obtain a first scavenging concentrate and a first scavenging tailing. For each ton of the argillaceous lepidolite ore, 350 g of the depressant, 130 g of the collector, and 65 g of the froth control agent were added to the roughing tailing for the first scavenging. (4) The first scavenging tailing obtained in step (3) was subjected to second scavenging to obtain a second scavenging concentrate and a second scavenging tailing, where the second scavenging tailing was a flotation tailing. (5) The depressant, the collector, and the froth control agent were added in sequence to the roughing concentrate obtained in step (2), and a resulting mixture was subjected to first cleaning to obtain a first cleaning concentrate and a first cleaning tailing. For each ton of the argillaceous lepidolite ore, 250 g of the depressant, 85 g of the collector, and 80 g of the froth control agent were added to the roughing concentrate for the first cleaning. (6) The first cleaning concentrate obtained in step (5) was subjected to second cleaning to obtain lithium concentrate II and a second cleaning tailing. (7) The first scavenging concentrate obtained in step (3), the second scavenging concentrate obtained in step (4), the first cleaning tailing obtained in step (5), and the second cleaning tailing obtained in step (6) were combined to obtain a lithium-containing mixed middling, and the collector and the froth control agent were added in sequence to the lithium-containing mixed middling. A resulting mixture was subjected to cleaning-scavenging to obtain lithium concentrate II and a cleaning-scavenging tailing, where the cleaning-scavenging tailing was recycled to the second scavenging in step (4). For each ton of the argillaceous lepidolite ore, 60 g of the collector and 70 g of the froth control agent were added to the lithium-containing mixed middling for the cleaning-scavenging. (8) The lithium concentrate I obtained in step (6) and the lithium concentrate II obtained in step (7) were combined to obtain a lithium concentrate product.

(12) In this example, a flotation recovery of lithium is 88.3%.

(13) The embodiments of the present disclosure have been described in detail above, but the present disclosure is not limited to the above embodiments. Various changes can be made without departing from the concept of the present disclosure within the range of knowledge possessed by those of ordinary skill in the art.