A method for utilizing blast furnace water-quenched slag
A blast furnace slag quenching and slag filtering technology, applied in the direction of carbide, silicon carbide, etc., can solve the problems of pollution and double waste, and achieve the effect of reducing production, realizing comprehensive resource recycling and utilization, and large-scale industrial application value.
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Embodiment 1
[0035] 1) Crush and grind the water-quenched slag of the steel smelting blast furnace and the waste cathode carbon block of the aluminum electrolysis industry to -400 mesh respectively, and dry them at 300°C for 24 hours until their quality does not change under the oven temperature Finally, by mass ratio water quenching slag: cathode carbon block=1:2 the two powders are evenly mixed to obtain mixed powder;
[0036] 2) According to the mass ratio, the mixed powder: hydrochloric acid solution = 1:5; the mixed powder obtained in step 1) is dispersed in the hydrochloric acid solution (the concentration of hydrogen ions is 3mol / l), at a temperature of 90°C Stir for 10 hours at a stirring speed of 300r / min, filter for solid-liquid separation, wash the filter residue with deionized water until the pH value of the washing solution is 6.8-7.2, remove soluble ions and impurities in the mixture, and place the obtained filter residue at a temperature of 300°C Dry under the same condition...
Embodiment 2
[0039] 1) Crush and grind the water-quenched slag of the iron and steel smelting blast furnace and the waste cathode carbon blocks of the aluminum electrolysis industry to -300-+400 mesh respectively, and dry them at 100°C for 8 hours until their quality reaches the temperature of the oven. After no longer changing, according to the mass ratio of water quenching slag: cathode carbon block = 1:0.5, the two powders are evenly mixed to obtain the mixed powder;
[0040]2) According to the mass ratio, mixed powder: sulfuric acid solution = 1:5, disperse the mixed powder obtained in step 1) in the desulfuric acid solution (the concentration of hydrogen ions is 3mol / l), at a temperature of 70°C Stir for 4 hours at a stirring speed of 100r / min, filter for solid-liquid separation, and repeat the above operation for the filter residue three times, remove soluble ions and impurities in the mixture, and dry the obtained filter residue at a temperature of 100°C for 8 hours. Wait for all th...
Embodiment 3
[0043] Specific steps are as follows:
[0044] 1) Crush and grind the water-quenched slag of the iron and steel smelting blast furnace and the waste cathode carbon blocks of the aluminum electrolysis industry to -300 mesh respectively, and dry them at a temperature of 150°C for 12 hours, and wait until their quality does not change under the oven temperature Finally, by mass ratio water quenching slag: cathode carbon block=1:1.5 the two powders are evenly mixed to obtain mixed powder;
[0045] 2) According to the mass ratio, mixed powder: sulfuric acid solution = 1:10, disperse the mixed powder obtained in step 1) in sulfuric acid solution (hydrogen ion concentration is 4mol / l), at a temperature of 80 ° C Stir for 6 hours at a stirring speed of 200r / min, filter for solid-liquid separation, repeat the above operation for the filter residue three times, wash the filter residue until the pH value of the washing liquid is 6.8-7.2, remove the soluble ions and impurities in the mixt...
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