Pre-enrichment heavy liquid for extracting aluminum, lithium and gallium from fly ash and pretreatment method

A fly ash and pretreatment technology, which is applied in the field of heavy liquid for pretreatment and pretreatment, can solve the problems of undiscovered separation medium, difficult separation and recovery, environmental pollution, inaccurate density of heavy liquid, etc., so as to reduce production cost and reasonable Allocate resources and improve the effect of content
CN108396149AInactive Publication Date: 2018-08-14TAIYUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TAIYUAN UNIV OF TECH
Publication Date
2018-08-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a pre-enrichment heavy liquid for extracting aluminum, lithium and gallium from fly ash and a pretreatment method, and relates to the technical field of resource utilization ofsolid waste fly ash. The pre-enrichment heavy liquid comprises bromoform and ethanol, and the density of the prepared heavy liquid is 1.8-2.4g / cm3. The pretreatment method comprises the processes ofheavy liquid preparation, centrifugal separation, filtration, atmospheric distillation, heavy liquid recovery and fly ash drying. The invention provides the method that fly ash is subjected to floating-sinking pretreatment and the fly ash is divided into two density grades. The selected heavy liquid is easy to prepare and can be recycled, the cost is saved without causing pollution to surroundingenvironment, and the content of aluminum, lithium and gallium in the high-density fly ash obtained by sorting is greatly increased; and at the same time, the treatment amount in the extraction processis reduced, the reasonable and efficient utilization of the fly ash can be realized, the method can be used for the pretreatment process of the fly ash when aluminum, lithium and gallium are extracted from the fly ash, and the effective enrichment of aluminum, lithium and gallium elements can be carried out.
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Description

technical field

[0001] The invention relates to the technical field of resource utilization of solid waste fly ash, in particular to a pretreatment heavy liquid for extracting aluminum lithium gallium from fly ash and a pretreatment method. Background technique

[0002] With the development of my country's coal power industry, China's average annual release of fly ash is close to 600 million tons, but there are still nearly 100 million tons of fly ash that cannot be properly disposed and utilized, especially in Shanxi, Inner Mongolia, Xinjiang and other power plant-rich areas, so the rational use of fly ash is an urgent issue of environmental protection and efficient use of resources. With the gradual deepening of research on fly ash, the extraction of beneficial elements in fly ash has become an efficient and economical utilization direction. Shenhua Zhungeer Energy Co., Ltd. successfully produced the first batch of metal gallium in its test line by using the acid-based gal...

Claims

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