Process for producing iron oxide red by dry method
An iron oxide red, process technology, applied in the direction of iron oxide/iron hydroxide, etc., can solve the problems of reduced output, large environmental pollution, difficult to remove oil, etc., and achieve the effect of ensuring product quality, simple production process, and few influencing factors.
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Embodiment 1
[0018] Embodiment 1 and embodiment 2 all are in the production workshop, according to the production process of the present invention, the iron oxide red that manufactures respectively.
[0019] Example 1
[0020] refer to figure 1 , first purify the raw material iron scale (74.5% iron content), remove dense and larger non-metallic substances through a 5-mesh screen, and remove smaller impurities through magnetic separation; then in a 1.2×6m rotary drying Carry out high-temperature drying and degreasing in a dry furnace, and the temperature in the furnace is 200°C; after high-temperature drying, carry out coarse crushing in a 1.5×5.7m ball mill, and the output particle size -200 mesh reaches 92%, which is less than once Oxidation requires coarse crushing in the ball mill again, and the current is controlled at 190A; finally, an oxidation is carried out in a 0.9×10m externally heated double-barreled oxidation furnace, the temperature in the furnace is 900°C, and the feed rate ...
Embodiment 2
[0026] refer to figure 2 , first purify the raw material iron scale (76% iron content), remove dense and larger foreign matter through a 5-mesh screen, and remove smaller impurities through magnetic separation; then in a 1.2×6m rotary drying furnace High-temperature drying and degreasing are carried out in the furnace, and the temperature in the furnace is 190°C; after high-temperature drying, coarse crushing is carried out in a 1.5×5.7m ball mill, and the output particle size -200 mesh reaches 93%, which does not meet the primary oxidation requirement. The coarse crushing in the ball mill is carried out again, and the current is controlled at 190A; finally, an oxidation is carried out in a 0.9×10m externally heated double-barrel oxidation furnace, the temperature in the furnace is 910°C, and the feed rate is 250 kg / hour. The reaction equation in the furnace is:
[0027] 4Fe 3 o 4 +O 2 →6Fe 2 o 3 (1)
[0028] C+O 2 →CO 2 (2)
[0029] Combination ...
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