Converter desilicication and dephosphorization slag and secondary aluminum ash synergistic chromium slag harmlessness process

Abstract

The invention discloses a converter desilicication and dephosphorization slag and secondary aluminum ash synergistic chromium slag harmlessness process which is implemented according to the following steps: 1, processing chromium slag to 70-200 meshes, and transporting the chromium slag to a high-pressure dry powder pelletizer production line for later use; 2, crushing the secondary aluminum ash to 70 meshes, and transporting the crushed secondary aluminum ash to a high-pressure dry powder pelletizer production line for later use; 3, the chromium slag and the secondary aluminum ash are produced into pellets with the particle size of 15-30 mm on a high-pressure dry powder pellet press according to the mass ratio of 6: 4, and the pellets are conveyed to a converter production line for standby application; 4, converter double-slag operation is conducted, the pellets are added into a slag tank while desilicication and dephosphorization slag is poured out, and 100-150 kg of the pellets are added into each ton of steel slag; and 5, treating the steel slag according to the traditional treatment process of the steel slag without changing the original treatment process of the steel slag.

Description

technical field [0001] The invention relates to a harmless process of converter desiliconization and dephosphorization slag and secondary aluminum ash in cooperation with chromium slag. Background technique [0002] Aluminum ash is a solid substance containing metallic aluminum and other components produced during the production or use and recycling of electrolytic aluminum, cast aluminum and other aluminum industries. The basic range of main components and their content (mass percentage) in primary aluminum ash: metal aluminum 10% to 30%; aluminum nitride 7% to 20%; aluminum oxide, 20% to 40%; silicon dioxide, magnesium oxide, The content of iron oxide is 3% to 15%; the chloride of alkali metal potassium, sodium, calcium and magnesium and other trace fluorides contain 15% to 30%. [0003] After the aluminum ash is sieved or fried, the remaining aluminum ash after extracting most of the metal aluminum in the aluminum ash is called the secondary aluminum ash, which contains ...

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Problems solved by technology

[0008] Through the introduction of the above documents, it can be seen that the above documents also do not mention the process of using secondary aluminum ash and converter desiliconization slag to coordinate the harmless transformation of chromium slag

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