The invention discloses a production method for low-iron low-
silicon fire-resistant material grade
chromium oxide green. The production method comprises the following steps: (1), selecting premium-grade
chromic anhydride, wherein the
silicon content and the
iron content are less than 0.02%; (2), adding the
chromic anhydride in a
rotary kiln, wherein the
kiln head sealing cover of the
rotary kiln adopts a stainless steel sealing cover, the
kiln head
refractory bricks are made of zirconia
refractory, and the
kiln tail is made of normal
refractory material; (3), heating the
rotary kiln, controlling the temperature of the kiln head to 1000-1200 DEG C, controlling the temperature of the kiln
tail to 400-600 DEG C, and enabling the material to stay for 2-4 h in the rotary kiln; (4), after
roasting, performing natural cooling to the
room temperature, mixing material, screening,
grinding and packaging, so as to obtain the low-iron low-
silicon fire-resistant material grade
chromium oxide green. According to the invention, through improvement and process optimizing control, the content of the silicon and iron meets the requirements of the fire-resistant material grade
chromium oxide green, the product meeting the requirements of customers are produced, the product market is expanded, and the additional value of the low-iron low-silicon fire-resistant material grade
chromium oxide green is increased.