High-temperature molten steel slag treating method
A technology of liquid steel slag and a treatment method, which is applied in the field of waste steel slag recycling, can solve the problems of inability to use liquid steel slag for atomization treatment, unable to adjust the fluidity of steel slag, etc., and achieves wide source of raw materials, good steel slag stability, and improved application range. Effect
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[0020] Example 1
[0021] The original steel slag is selected from Jinan Iron and Steel Group, and its chemical composition is CaO 38.96%, SiO 2 13.27%, Fe 2 O 3 22.62%, FeO 9.17%, Al 2 O 3 1.59%, MgO 6.68%, free calcium oxide 2.6%, free magnesium oxide 6.68%, and other 6.52%.
[0022] According to the composition of steel slag: CaO: SiO 2 = =3.15:1;
[0023] CaO: SiO 2 : Al 2 O 3 = ;
[0024] In 1000kg steel slag, CaO: 1000000×0.3896 / 56=6957 (mol);
[0025] SiO 2 :1000000×0.1327 / 60=2211.7 (mol);
[0026] In view of the steel slag content and CaO: SiO 2 =2.5-3:1 is the closest, so the modifier configuration should be based on this, the target ratio is 3:1, the amount of modifier added is 1% of the steel slag mass, which is 10kg,
[0027] Calculate the CaO and SiO to be added to 1000kg steel slag 2 The masses are 2624g and 7376g respectively.
[0028] Weigh 2624g CaO and 7376g SiO 2 , Respectively pulverize to below 5 mesh, and then mix uniformly to prepare a modifier for ...
Example Embodiment
[0030] Example 2
[0031] The chemical composition of the original steel slag is CaO 40.32%, SiO 2 28.32%, FeO8.2%, Al 2 O 3 2.21%, MgO 5.0%, free calcium oxide 12.3%, free magnesium oxide 3.5%, others 1.5%.
[0032] According to the composition of steel slag: CaO: SiO 2 = =1.53:1;
[0033] CaO: SiO 2 : Al 2 O 3 = ;
[0034] In 1000kg steel slag, CaO: 1000000×0.4032 / 56=7200 (mol);
[0035] SiO 2 :1000000×0.2832 / 60=4720 (mol);
[0036] Al 2 O 3 : 1000000×0.024 / 102=235.3 (mol);
[0037] In view of the steel slag content and CaO: SiO 2 : Al 2 O 3 =25-30: 15-25:1 is the closest, so the target ratio is set to CaO: SiO 2 : Al 2 O 3 =30:21:1, the amount of improver added is 5% of the mass of steel slag, which is 50kg;
[0038] Calculate the CaO and SiO to be added to 1000kg steel slag 2 And Al 2 O 3 The masses are 16750g, 31762g and 1488g respectively;
[0039] Weigh 16750g CaO, 31762g SiO 2 And 1488g Al 2 O 3 , Respectively pulverize to below 5 mesh, and then mix e...
Example Embodiment
[0041] Example 3
[0042] The chemical composition of the original steel slag is CaO 39.5%, SiO 2 16.8%, FeO17.2%, Al 2 O 3 2.4%, MgO 6.8%, free calcium oxide 10.3%, free magnesium oxide 6.5%, others, 0.5%.
[0043] According to the composition of steel slag: CaO: SiO 2 = =2.52:1;
[0044] CaO: SiO 2 : Al 2 O 3 = ;
[0045] In 1000kg steel slag, CaO: 1000000*0.395 / 56=7053.6 (mol);
[0046] SiO 2 :1000000×0.168 / 60=2800 (mol);
[0047] Al 2 O 3 : 1000000×0.024 / 102=235.3 (mol);
[0048] For the original steel slag CaO: SiO 2 : Al 2 O 3 =30: 11.9:1 and CaO: SiO 2 =2.52:1, so the target ratio is selected as CaO:SiO 2 =2.4:1, the addition amount of the modifier is 2.5% of the steel slag mass, which is 25kg.
[0049] Calculate the CaO and SiO to be added to 1000kg steel slag 2 And Al 2 O 3 The masses are 11518g and 13482g respectively;
[0050] Weigh 11518g CaO and 13482g SiO 2 , Respectively, crushed to below 5 mesh, and then mixed uniformly to make a modifier for use; use 2 tons of slag bag...
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