Method for preparing molten iron desulphurizer
A technology of hot metal desulfurization and additives, applied in the field of iron and steel metallurgical auxiliary materials, can solve the problems of high cost and low desulfurization efficiency, achieve the effects of suppressing volatilization, increasing desulfurization rate, and reducing costs
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Embodiment 1
[0060] The preparation method of desulfurizing agent of the present invention, step is as follows:
[0061] (1) Take 80 parts of CaO for passivation treatment, the process is as follows:
[0062] a. Spraying: Mix 80 parts of water and 80 parts of CaO in a container, and then spray the additive (5 parts of cyclic dimethyl silicone oil, hydraulic oil and soybean oil) on the lime surface, and rotate while spraying Spray and mix in the same way;
[0063] Among them, the raw material parameters are as follows: lime containing CaO ≥ 70-88%, its S ≤ 0.05%, activity ≥ 250ml / 4N(HCl), loss of ignition < 0.5%, angle of repose < 35°, after passivation treatment, particle size 0.01 to 0.1mm.
[0064] b. Heat preservation: heat preservation at 100~1050°C for 4 minutes to make the additive boil and completely volatilize and be absorbed by slaked lime to form a protective film;
[0065] (2) After mixing the following ingredients with the materials prepared in step (1), dry pretreatment: ...
Embodiment 2
[0076] The preparation method of desulfurizing agent of the present invention, step is as follows:
[0077] (1) Take 82 parts of CaO for passivation treatment, the process is as follows:
[0078] a. Spraying: Mix water and CaO in a mass ratio of 1:1 in a container, then spray the additive on the lime surface, and spray and mix evenly while spraying while rotating; wherein, the additive is cyclic dimethyl silicone oil 8 parts, hydraulic oil 9 parts, soybean oil 5 parts;
[0079] b. Heat preservation: heat preservation at 100~1050°C for 4 minutes to make the additive boil and completely volatilize and be absorbed by slaked lime to form a protective film;
[0080] (2) After mixing the following ingredients with the materials prepared in step (1), dry the pretreatment;
[0081] C 7 copies
[0082] Mg 7 parts
[0083] Zn 6 parts
[0084] Calcium aluminate 7 parts
[0085] 8 parts of soda ash,
[0086] Then pour the passivation solution into the above materials, stir until t...
Embodiment 3
[0090] The preparation method of desulfurizing agent of the present invention, step is as follows:
[0091] (1) Take 85 parts of CaO for passivation treatment, the process is as follows:
[0092] a. Spraying: Mix water and CaO in a mass ratio of 1:1 in a container, then spray the additive on the lime surface, and spray and mix evenly while spraying while rotating; wherein, the additive is cyclic dimethyl silicone oil 10 parts, hydraulic oil 10 parts, soybean oil 10 parts mixed;
[0093] b. Heat preservation: heat preservation at 100~1050°C for 4 minutes to make the additive boil and completely volatilize and be absorbed by slaked lime to form a protective film;
[0094] (2) After mixing the following ingredients with the materials prepared in step (1), dry the pretreatment;
[0095] C 10 copies
[0096] Mg 10 parts
[0097] Zn 10 parts
[0098] Calcium aluminate 8 parts
[0099] 10 parts of soda ash.
[0100] Among them, soda ash contains more than 90% Na 2 CO 3 , S w...
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