Technology for producing sponge iron by taking carbon-Lan as reducing agent
A technology of sponge iron and reducing agent, applied in furnaces, furnace types, fluidized bed furnaces, etc., can solve problems such as long production cycle, high cost, and restrictions on the development of iron-based powders
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Embodiment 1
[0022] A kind of technology that utilizes semi-coke to make reducing agent to produce sponge iron is finished by following several steps:
[0023] 1) Material selection: the waste iron scale produced by the production of steel strips on the hot-rolled steel strip production line is selected as the main raw material, and the iron content is more than 72%;
[0024] 2) Mixing: semi-coke and stone chips are mixed evenly according to the volume ratio of 3.5:2.5;
[0025] 3) Drying of raw materials: Dry the iron scales, blue charcoal and stone chips prepared in proportion with two dryers respectively;
[0026] 4) Crushing of raw materials: After the dried iron scales are crushed by a jaw crusher, the return material of the jaw crusher is crushed again by a high powder machine; the mixture of dried semi-coke and stone chips is crushed by a jaw crusher Crusher for crushing;
[0027] 5) Loading: Put the prepared raw materials into the silicon carbide tanks, and the silicon carbide ta...
Embodiment 2
[0036] Laiwu Taidong Powder Technology Co., Ltd. uses the present invention to produce sponge iron on an 86-meter full blast furnace gas tunnel kiln, and the implementation steps 1), 3), 4), 5), 6), and 7) are the same as in Example 1, except for the steps 2) Mixing:
[0037] Semi-coke and stone chips are mixed evenly according to the volume ratio of 5:2.
[0038] The kiln car is advanced every 120 minutes, the reduction time is 50 hours, and the reduction temperature is 1140°C±15°C
[0039] The silicon carbide tank has a diameter of 400mm and a height of 400mm, and is assembled vertically in groups of four on the kiln car, with a height of 1.6 meters. The thickness of the iron scale layer of the equipment is 40mm, the height of the equipment is 1.5 meters, and the material is stainless steel.
[0040] The main technical parameters are as follows
[0041]
Embodiment 3
[0043] A kind of technology that utilizes semi-coke as reducing agent to produce sponge iron, implementation steps 1), 3), 4), 5), 6), 7) are the same as embodiment 1, only step 2) mixing: semi-coke and stone chips Mix evenly according to the volume ratio of 4:1.5.
[0044] The sieve hole of the bottom sieve adopted by the jaw crusher for crushing iron scale is 6mm; the sieve hole of the bottom sieve for the high-speed crusher is 6mm, and the sieve hole of the bottom sieve used by the jaw crusher for crushing semi-coke and stone chip mixture is 12mm.
[0045] The kiln car is advanced every 110 minutes, the reduction time is 45 hours, and the reduction temperature is 1140°C±20°C.
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