Beryllium slag detoxification and cement kiln collaborative resource treatment system and process

Abstract

The invention discloses a beryllium slag detoxification and cement kiln collaborative resource treatment system and process. The beryllium slag can be washed with water under acidic conditions to form a beryllium sulfate solution and solid slag, wherein the beryllium sulfate solution reacts with ammonia water to generate hydrogen Beryllium oxide precipitation, the precipitation is separated and used to recover beryllium hydroxide; and the solid slag is sent to the system cement kiln for high-temperature calcination after treatment, and the beryllium contained in the solid slag is solid-fused in the cement clinker lattice to form iron beryllium acid Minerals such as calcium, aluminum beryllium and calcium beryllium, the content of beryllium in cement reaches a trace amount, and the leaching solubility is less than 0.1μg / l, which meets the requirements of cement raw materials. The ammonia nitrogen compound produced during the reaction is converted into ammonia water or ammonium salt, which can be used as The cement kiln denitrification agent or returned to the beryllium smelter as an auxiliary agent can completely eliminate the residue, completely eliminate the toxic characteristics, and realize the recycling and harmless treatment of beryllium slag.

Description

technical field [0001] The invention belongs to a treatment method for detoxifying waste slag in the refining process of beryllium metal, and in particular relates to a system and method for utilizing cement kiln collaborative resource treatment of beryllium slag. Background technique [0002] Beryllium is a kind of off-white alkaline earth metal, which can be dissolved in both acid and alkali. Listed as a class of carcinogens. [0003] Beryllium is a rare light metal with unique and excellent physical, chemical, mechanical and nuclear properties. Since the discovery of beryllium, the properties of beryllium have attracted great attention from 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, rockets, missiles, satellites, aviation, aerospace, electronics, instruments, petrochemicals, ceramics and other industries. Since 1926, it has been noticed that adding small amo...

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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