The invention discloses a method for producing
chromium metal by using a carbon reduction two-
step method, which comprises the following steps:
grinding 100 parts of
chromium sesquioxide with the purity of 94 to 99.5 percent and 25 to 44 parts of carbon
powder, mixing and stirring the ground
powder uniformly, pressing the
powder to form balls, and putting the balls into a high temperature furnace to perform primary carbon
reduction treatment to generate
chromium carbon melt; crushing the melt into
fine powder of 80 to 200 meshes, measuring the carbon content, adding the
chromium sesquioxide into the melt in a ratio of
oxygen to carbon of 1: 33, stirring the mixture fully and uniformly, and pressing and
drying the mixture; and putting the dried blank into a vacuum high-
humidity furnace, keeping the blank wet for 14 to 15 hours under the vacuum of 20 to 200Pa at the
furnace temperature of between 1,300 and 1,600 DEG C, or putting the blank into the high temperature furnace filled with
argon, heating the blank to 2,000 DEG C to be smelted, preserving the heat for 2 hours,
casting the blank to form blocks, and discharging the blocks after cooling. The method can produce chromium
metal products of multiple specifications with the purity of 94 to 99.5 percent, and has large production capacity and high work efficiency so as to achieve the purpose of industrialized production.