Abstract: A method of recycling a waste of an HSS processing process includes a pre-treating step of pre-treating the waste of the HSS processing process, a primary melting step of forming a primary melt by primarily melting at least one of ferro molybdenum, ferro tungsten, and ferro cobalt and the pre-treated waste of the HSS processing process at 1500 to 2500 degrees Celsius (° C.), and a preparing step of preparing the HSS master alloy by ingot casting the primary melt, wherein the pre-treating step includes: a separating step of separating the waste of the HSS processing process according to a composition, and a mixing step of forming a mixture by mixing oxides containing at least one of K2O, CaO, MgO, SiO2, Al2O3, and Fe2O3 and the separated waste of the HSS processing process with each other, the mixture having a melting point of 800 to 1700° C.

Abstract: A washing machine includes a main body that includes a washing unit capable of washing laundry and a micro bubble generation unit configured to generate micro bubbles and supply the generated micro bubbles to the washing unit. The micro bubble generation unit includes a circulation unit supplied with water from the washing unit and configured to pressurize the water at a high pressure, an air supplier configured to supply air, a mixer connected to the circulation unit and the air supplier, configured to mix the washing water and the air, and a slit through which the mixed water and air pass through to generate the micro bubbles.

Abstract: A washing machine includes a main body that includes a washing unit capable of washing laundry and a micro bubble generation unit configured to generate micro bubbles and supply the generated micro bubbles to the washing unit. The micro bubble generation unit includes a circulation unit supplied with water from the washing unit and configured to pressurize the water at a high pressure, an air supplier configured to supply air, a mixer connected to the circulation unit and the air supplier, configured to mix the washing water and the air, and a slit through which the mixed water and air pass through to generate the micro bubbles.