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Lepidolite floatation method

A lepidolite and flotation technology, applied in flotation, chemical instruments and methods, wet separation, etc., can solve the problems of sticky foam, affecting the process, and increasing the cost of chemicals, so that the foam is brittle and does not burst Viscosity, simple reagent preparation, and high flotation efficiency

Active Publication Date: 2017-08-04
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the collectors of the traditional flotation method have certain limitations. At present, most of the domestic mainstream lepidolite flotation collectors use mixed amine collectors and cationic amine collectors. Poor adaptability, and the foam is sticky and not brittle, which deteriorates the flotation and affects the process after flotation; while the use of anionic fatty acid collectors has the disadvantages of complex reagent system and high production costs
Some scholars have also studied the collection effect of quaternary ammonium salts on lepidolite, but limited by the cost of chemicals, they cannot be popularized
Moreover, the traditional flotation process is complicated. In order to meet the requirements of lithium grade and recovery rate, a large number of inhibitors and dispersants are added, and the cost of chemicals is continuously increased.

Method used

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Embodiment 1

[0024] According to the above-mentioned lepidolite flotation method of the present invention, it is tried out in Jiangxi Yichun lepidolite ore, the Li of this ore 2 The O content is 0.66%. The sample is first broken-ball milled until 90% of the sample is less than 0.15mm, and then the finely ground slurry is poured into the flotation tank for desliming, and then the flotation test is carried out:

[0025] 1) Second desliming: The raw ore is deslimed for the first time by using a cyclone, and the first deslimed product is deslimed by a hydraulic classifier for the second desliming. After the second desliming, the slime yield reaches 17 -19%, become the ore for roughing;

[0026] 2) Preparation of dodecylamine polyoxyethylene ether solution: Dissolve dodecylamine polyoxyethylene ether with glacial acetic acid and dilute it with water; Amine polyoxyethylene ether accounts for 0.5-2%, glacial acetic acid accounts for 1-3%, and the rest is water. In this embodiment, dodecylamine...

Embodiment 2

[0032] This embodiment is still a test done with the method of the present invention. Compared with Embodiment 1, the process parameters of this embodiment have been adjusted, which is specifically shown in step 3) adjusting the pH of the pulp to 4 in a rough selection to prepare dodecylamine polyoxyethylene The ether solution is prepared by adding 160g / t dodecylamine polyoxyethylene ether per ton of flotation raw ore; the pH of the pulp is adjusted to 4 in step 4); Dodecylamine polyoxyethylene ether solution is prepared by adding 80g / t dodecylamine polyoxyethylene ether per ton of flotation raw ore.

[0033] After the above flotation process was carried out six times, the quality and grade of the flotation concentrate and flotation tailings obtained in each test were basically unchanged, and the stabilized concentrate and tailings were sampled and analyzed. The flotation results show that the Li2O grade in the flotation concentrate is 3.07%, the enrichment ratio is 4.65, the ...

Embodiment 3

[0035] This embodiment is a test of lepidolite ore flotation with the prior art, wherein the collector dodecylamine solution is a collector commonly used in the prior art. After the flotation process was performed six times, the quality and grade of the flotation concentrate and flotation tailings obtained in each test were basically unchanged, and the stabilized concentrate and tailings were sampled and analyzed.

[0036] The flotation results show that the Li2O grade in the flotation concentrate reaches 2.93%, the enrichment ratio reaches 4.44, the concentrate yield is 13.72%, and the recovery rate of Li2O in the raw ore is 60.29%; the Li2O content in the flotation tailings is 0.27% %, the tailings yield was 69.09%, and the lithium recovery rate was 27.98%.

[0037] Compared with the flotation result of prior art embodiment 3, the flotation results of Examples 1 and 2 can be seen: the flotation method of the present invention has high flotation efficiency, and in the obtaine...

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Abstract

The invention discloses a lepidolite floatation method. The lepidolite floatation method comprises the steps that raw ore is subjected to wet ball milling after being crushed to obtain ore pulp; and the ore pulp is subjected to floatation separation with a lauryl amine polyoxyethylene ether solution serving as a collecting agent and with sulfuric acid serving as a regulating agent to obtain high-quality lepidolite concentrate. The lepidolite floatation method has the characteristics of being simple in process, low in agent consumption and production cost and good in adaptability to slime, the recovery rate of the lepidolite concentrate reaches 66.38% relative to Li2O in the raw ore, the content of lepidolite concentrate grade Li2O reaches 3.17%, the concentration ratio reaches 4.80, comprehensive utilization value of lepidolite resources is remarkably improved, and the floatation method is environmentally friendly and has sustainable-development long-term and practical significance.

Description

technical field [0001] The invention belongs to the field of lepidolite flotation, and in particular relates to a lepidolite flotation method. Background technique [0002] Lepidolite is one of the main industrial minerals for extracting lithium. Lithium is an important energy metal. Its application in high-energy lithium batteries and controlled thermonuclear reactions makes it an important raw material to solve long-term energy supply for human beings. Lithium series products are widely used in smelting, refrigeration, atomic energy, aerospace and ceramics, glass, grease, rubber, welding, medicine, batteries and other industries. my country's lithium resources are relatively rich, but the grade is relatively low, the embedded particle size is fine, it is easy to muddy, and the utilization level is low. The resource advantage has not yet been transformed into an economic advantage. [0003] At present, due to advantages such as cost and impurity content, salt lake brine i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/016B03D101/02B03D103/04
CPCB03B7/00B03D1/016B03D2201/02B03D2203/04
Inventor 焦芬覃文庆王云帆罗俊凯刘维丰丽琴李琛
Owner CENT SOUTH UNIV
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