Sustainable Mining and Metallurgy

In view of the problems of insufficient emergency support capacity, large oxygen emission, excessive steam consumption by liquid oxygen vaporization, and lack of nitrogen emergency and peak shaving reserve in the oxygen supply system of a certain group, with the development of variable multi-cycle cold energy utilization technology as the core, a new technology of high-efficiency oxygen variable load + nitrogen energy-saving recovery was introduced by expanding the liquid oxygen storage tank and vaporization system, constructing the liquid nitrogen storage tank and vaporization system, and constructing the oxygen and nitrogen cold energy utilization device to realize the liquefaction of oxygen using the cold energy of liquid nitrogen and vaporization of nitrogen using latent heat of oxygen. The new process finally realizes the variable recycling process of cold energy, greatly improves the utilization rate of oxygen and nitrogen resources, reduces steam consumption, and improves the stability of oxygen supply system and liquid nitrogen storage guarantee ability, which can produce good economic benefits.