Method for producing HRB600 steel by using primary aluminum dust of aluminum electrolysis plant

Abstract

The invention discloses a method for producing HRB600 steel by using primary aluminum dust of an aluminum electrolysis plant. The method comprises the following steps that 1, a part of binder is addedinto the primary aluminum dust of the aluminum electrolysis plant, and the mixture is pressed into aluminum dust balls with the diameter of about 20 mm by adopting a dry powder type ball pressing machine; 2, the pressed aluminum dust ball bodies are carried and conveyed to a steelmaking production line for later use; 3, when the HRB600 steel is produced in a converter, the aluminum dust balls areadded firstly and then deoxidation alloying elements are added, and an original steelmaking process operation method is maintained; and 4, 1.5-3 kg of the aluminum dust balls is required for making one ton of steel. According to the method, the problem of secondary utilization of the primary aluminum dust can be effectively solved, the primary aluminum dust is applied to steelmaking production, so that the waste is changed into wealth, and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to a method for producing HRB600 by using primary aluminum ash in an electrolytic aluminum plant. Background technique [0002] In the production process of electrolytic aluminum, the primary aluminum ash produced contains metallic aluminum, aluminum nitride, aluminum oxide, fluoride, and heavy metals such as chromium, nickel, and arsenic. According to current statistics, during the production of electrolytic aluminum, 25-50 kg of aluminum ash is produced per ton of primary aluminum. Due to the special properties of aluminum ash, it will cause nitrogen increase in molten steel when used in the steelmaking process, so aluminum ash is considered to be a hazardous waste that is difficult to fully utilize. On the other hand, high-strength building material steel is the priority development direction of construction steel at present. The smelting and production of anti-seismic rebar HRB600 is based on the steelmaking process. Microal...

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Problems solved by technology

(3) In the paper titled "Recycling Status of Electrolytic Aluminum Ash Slag" published by Guo Qing in the 21st issue of "Materials Herald" in 2013, there is the following statement: "At present, aluminum can be developed and applied on a large scale. Ash technology is mainly concentrated in technical fields such as the production of refractory materials and water purification flocculants, but there are shortcomings such as long process flow and serious secondary pollution.”

According to the above content expression, it can be seen that there is no process to use aluminum ash from electrolytic aluminum plants as the production method of HRB600