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Chemical metallurgy method for extracting beryllium oxide from chrysoberyl

A technology of chemical metallurgy and chrysoberyl, applied in the field of comprehensive treatment, can solve the problems of ineffective development and utilization, low metal recovery rate, poor sorting index, etc., and achieve low production cost, high metal yield, and good sorting index Effect

Inactive Publication Date: 2013-05-08
戴元宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Beryllium exists in the form of chrysoberyl with complex gangue symbiosis. It has a complex structure and low grade. With traditional dressing and smelting technology, it needs to go through dolomite flotation, beryllium ore flotation, high-temperature roasting, acid leaching, 4-stage extraction, and 3-stage extraction. Stripping, alkaline hydrolysis, drying, calcination and other tedious processes, poor sorting index, low metal recovery rate, and high cost ① have made this rich treasure so far unable to be effectively developed and utilized. Among the Hundred Thousand Mountains

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Example 1: Production of industrial beryllium oxide from beryllium ore at point A in Shuyuao, Linwu, Hunan.

[0021] 1. Analysis of main components of raw materials:

[0022] .

[0023] two. Main process flow:

[0024] Mineral materials are pulverized and finely ground, and the conversion agent ammonium fluorosilicate and activator limestone are added to mix and roast. The ammonium fluoroberyllate solution is produced by water spray heap leaching, the slag is sent as building material, and the solution is used to sink beryllium. Ammonium bicarbonate is added to ammonium fluoroberyllate solution to react to precipitate beryllium, and the precipitate is basic beryllium carbonate, which is sent to roast to obtain beryllium oxide products. The mother liquor is ammonium fluoride, which is concentrated and crystallized to obtain ammonium fluoride by-products.

[0025] 3. Process conditions:

[0026] 1. Mineral particle size: ≥95wt% through a 100-mesh sieve.

[0027] ...

example 2

[0052] Example 2: Production of industrial beryllium oxide from beryllium ore at Rehui'ao Point B, Linwu, Hunan.

[0053] 1. Analysis of main components of raw materials:

[0054] .

[0055] two. Main process flow:

[0056] Mineral materials are pulverized and finely ground, and the conversion agent ammonium fluorosilicate and activator limestone are added to mix and roast. The ammonium fluoroberyllate solution is produced by water spray heap leaching, the slag is sent as building material, and the solution is used to sink beryllium. Ammonium bicarbonate is added to ammonium fluoroberyllate solution to react to precipitate beryllium, and the precipitate is basic beryllium carbonate, which is sent to be roasted to obtain industrial beryllium oxide products.

[0057] 3. Process conditions:

[0058] 1. Mineral particle size: ≥95wt% through a 100-mesh sieve.

[0059] 2. Structural conversion roasting conditions:

[0060] (1) Dosage of ingredients: ammonium fluorosilicate...

example 3

[0084] Example 3: Production of industrial beryllium oxide from beryllium mine in Xizhou, Hunan.

[0085] 1. Analysis of main components of raw materials:

[0086] .

[0087] two. Main process flow:

[0088] Mineral materials are pulverized and finely ground, and the conversion agent ammonium fluorosilicate and activator limestone are added to mix and roast. The ammonium fluoroberyllate solution is produced by water spray heap leaching, the slag is sent as building material, and the solution is used to sink beryllium. Ammonium bicarbonate is added to ammonium fluoroberyllate solution to react to precipitate beryllium, and the precipitate is basic beryllium carbonate, which is sent to be roasted to obtain industrial beryllium oxide products.

[0089] 3. Process conditions:

[0090] 1. Mineral particle size: ≥95wt% through a 100-mesh sieve.

[0091] 2. Structural conversion roasting conditions:

[0092] (1) Dosage of ingredients: ammonium fluorosilicate: 2.5 times the ...

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Abstract

The invention discloses a chemical metallurgy method for extracting beryllium oxide from chrysoberyl. The chemical metallurgy method is a comprehensive treatment technology for carrying out chemical metallurgy on refractory chrysoberyl with not more than 0.5% of Be. The chemical metallurgy method is characterized by comprising the following steps of: carrying out structural transformation roasting on the minerals by using ammonium fluosilicate as a structural transforming agent in the presence of activator limestone; cooling the roasted minerals and using water to spray dump leaching beryllium; precipitating beryllium for the ammonium fluoroberyllate solution by using ammonium bicarbonate to obtain basic beryllium carbonate; calcining the basic beryllium carbonate to release carbon dioxide and water vapor to obtain the product beryllium oxide; and concentrating and crystallizing a beryllium-precipitated solution which is the beryllium fluoride solution under reduced pressure, and drying the concentrated and crystallized solution in air flow to obtain the product ammonium fluoride. The chemical metallurgy method disclosed by the invention is simple in process, low in price, free of pollution, high in metal recovery rate, low in production cost and capable of effectively separating and extracting beryllium in the chrysoberyl.

Description

technical field [0001] The invention is a comprehensive treatment technology for chemical metallurgy of refractory lean beryllium ore chrysoberyl ore containing Be≤0.5%. Background technique [0002] The production of beryllium oxide has long relied on the flotation enrichment of beryl and the extraction by sulfuric acid and fluorination. With the reduction and depletion of beryl mines, countries around the world are actively seeking to develop other efficient and non-polluting technologies for beryllium-containing minerals. [0003] Central China and other places in my country contain tens of millions of tons of beryllium ore resources. Beryllium exists in the form of chrysoberyl with complex gangue symbiosis. It has a complex structure and low grade. Using traditional dressing and smelting technology, it needs to go through dolomite flotation, beryllium ore flotation, high-temperature roasting, acid leaching, 4-stage extraction, and 3-stage extraction. Back extraction, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/04C22B3/14C22B3/44C22B35/00
CPCY02P10/20
Inventor 戴元宁
Owner 戴元宁
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