4 results about "Electric arc furnace" patented technology

The invention relates to a method for the melting purification of magnesia by using a waste magnesium product. The adopted technical scheme is that the method comprises the following steps of: manually picking out and removing impurities visible to the naked eye from various purchased waste magnesium products; crushing and grinding the waste magnesium products subjected to the impurity removal into powder of below 800 meshes and removing iron with an iron removing device; removing carbon from the powder subjected to the iron removal by the water floatation method; loading the powder subjected to the carbon removal by the water floatation method into a kiln bogie, conveying the kiln bogie loaded with the powder to a tunnel kiln or a shuttle kiln, closing the kiln door, stirring the powder at the temperature of 550 to 650 DEG C and blowing in oxygen for 2 to 4 hours; uniformly mixing the powder subjected to the carbon removal with light burnt magnesium powder in a weight ratio of 1:2-4 and performing compression molding and drying; conveying the dried blank to a high-temperature electric arc furnace for melting at the temperature of 2,500 to 3,500 DEG C for 6 to 8 hours; and cooling, crushing and selecting the products. The method has the advantages of saving resource, protecting environment and saving energy.

Process and apparatus for melting raw material in an electric arc furnace using a flame of variable direction, the apparatus comprising a burner and a lance whereby the lance outlet opening and the burner outlet opening are not concentric and are located at a distance from one another, and whereby the lance axis forms an angle with the burner axis in the range from 10° to 40.

The invention discloses a Zr-Fe alloy for tritium storage and a preparation method thereof. The chemical formula of the alloy is Zr2-xTixFe1-y-zNiyCoz, wherein x, y and z represent the atomic ratios of Ti, Ni and Co replacing Zr and Fe correspondingly, x ranges from 0.01 to 0.05, y ranges from 0.01 to 0.05 and z ranges from 0.01 to 0.03. The preparation method of the Zr-Fe alloy comprises the following steps that (1) preparation is carried out according to the chemical formula, a vacuum non-consumable electric-arc furnace is adopted for carrying out turnover smelting 3-5 times, and a cast ingot is prepared; and (2) the smelted cast ingot is heated again into a smelted state, magnetic stirring is carried out for 2-5 min. The alloy is hydrogen storage alloy low in balance pressure, and has the beneficial effects that the room temperature balance pressure level is lower than 1 Pa, the hydrogen (tritium) adsorption and desorption rate is high, the cycle life is long, hydrogen induced disproportionation is resisted, and the hydrogen (tritium) storage capacity is large. In addition, the preparation method of the Zr-Fe alloy is easy to operate, easy to achieve and high in efficiency, andcompared with a common ZrCo alloy and ZrNi alloy, the cost is lower.