A method for smelting stainless steel mother liquor by utilizing stainless steel ashes

Abstract

The invention discloses a method for smelting stainless steel mother liquor by using stainless steel ashes. Obtain product A; b, sub-package addition: add stainless steel ash, ferrosilicon alloy and other types of stainless steel waste to product A for smelting in turn to obtain product B; c, composition adjustment: add ferrosilicon alloy and silicon carbide alloy to product B, steel The mass percentage of silicon in the liquid is 0.4-0.8%, and the mass percentage of carbon is 0.9-1.6%, to obtain product C; d, tapping product C to obtain product D; e, smelting product D in an AOD furnace to obtain The stainless steel mother liquor required by the standard composition of the steel grade. The invention can significantly increase the metal yield of chromium, nickel, molybdenum and other elements, greatly promote the recycling of stainless steel ashes and waste metals, and is a brand-new process for smelting stainless steel mother liquor by utilizing stainless steel ashes raw materials.

Description

technical field [0001] The invention relates to the fields of metal smelting and metal recycling, in particular to a method for smelting stainless steel mother liquor by using stainless steel ashes. Background technique [0002] Stainless steel ash includes stainless steel ingot grinding ash, stainless steel slab grinding ash, stainless steel cutting ash, stainless steel welding slag and other waste materials, which contain a large amount of precious metal oxides such as chromium oxide, molybdenum oxide, and nickel oxide. The by-products produced in the stainless steel production process of iron and steel enterprises, due to the many metal oxides in the ash material, the small particle size, and the low alloy recovery rate, make the stainless steel ash material backlog and stockpile, resulting in waste of resources and environmental pollution. [0003] Publication No. CN106987680A applies for a Chinese invention patent for a method of using stainless grinding powder. By comp...

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Problems solved by technology

[0002] Stainless steel ash includes stainless steel ingot grinding ash, stainless steel slab grinding ash, stainless steel cutting ash, stainless steel welding slag and other waste materials, which contain a large amount of precious metal oxides such as chromium oxide, molybdenum oxide, and nickel oxide. The by-products produced in the stainless steel production process of iron and steel enterprises, due to the many metal oxides in the ash material, the small particle size, and the low alloy recovery rate, make the stainless steel ash material backlog and stockpile, resulting in waste of resources and environmental pollution.