Detoxification and cement kiln cooperated resource-converting treatment system for beryllium slag and process

Abstract

The invention discloses a detoxification and cement kiln cooperated resource-converting treatment system for beryllium slag and a process. A beryllium sulfate solution and solid residues can be formedthrough subjecting the beryllium slag to water washing under acidic conditions, beryllium hydroxide precipitates are produced after subjecting the beryllium sulfate solution to a reaction with ammonia water, the precipitates are separated, and then, beryllium hydroxide is recovered; the solid residues are treated and then are fed to a system cement kiln for high temperature calcination, berylliumsolids contained in the solid residues are melted into cement clinker lattices to form minerals such as ferrum calcium beryllate, aluminum calcium beryllate and calcium beryllate; the content of beryllium in cement reaches trace, and the leaching solubility is lower than 0.1microgram / l, so that the requirements of the cement on raw materials are met; an ammonia nitrogen compound produced during reaction is converted into ammonia water or ammonium salts, which can serve as a cement kiln denitration agent or return to a beryllium smelting plant as auxiliaries, residual can be eliminated completely, the toxic hazard characteristic is eliminated thoroughly, and the resource-converting and innocent treatment of the beryllium slag is achieved.

Description

technical field [0001] The invention belongs to a treatment method for detoxification of waste slag in a beryllium metal refining process, in particular to a system and a method for utilizing a cement kiln to synergistically recycle beryllium slag. Background technique [0002] Beryllium is a grayish-white alkaline earth metal, which is soluble in both acid and alkali. It is an amphoteric metal. Both beryllium and its compounds are highly toxic. Classified as a Class I carcinogen. [0003] Beryllium is a rare light metal with unique and excellent physical, chemical, mechanical and nuclear properties. Since the discovery of the element beryllium, the properties of beryllium have attracted great attention of scientists. With the development of science and technology, the three main forms of beryllium metal, alloy and oxide have been widely used in atomic energy, rocket, missile, satellite, aviation, aerospace, electronics, instrumentation, petrochemical, ceramics and other in...

AI Technical Summary

Problems solved by technology

[0007] At present, the process of treating beryllium slag mainly has the problems of high disposal cost, high energy consumption, inability to achieve harmless treatment, and secondary pollution:

[0008] (1) There is still a small amount of beryllium in the washed solid slag, which will still pose a serious threat to the environment and human health after direct discharge

[0009] (2) The nitrogen oxides produced during the washing and detoxification process of beryllium slag and the ammonia gas produced during the reaction process will also pollute the environment after being discharged directly

[0010] (3) A large amount of waste liquid is produced during the treatment process, and a certain amount of metal beryllium and other heavy metal ions also exist in these waste liquids, which waste resources and pollute the environment after direct discharge

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