A kind of preparation method of oxygen carrier
A technology of oxygen carrier and materials, which is applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve the problem of difficulty in taking into account the mechanical strength of the oxygen carrier in preparation cost, and achieve the effect of accelerating the roasting reaction rate and improving the strength
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[0017] The present invention also provides a kind of preparation method of oxygen carrier, comprises the following steps:
[0018] In step 1, the steel slag and the red mud are dried and crushed in sequence respectively, and mixed uniformly to obtain a mixture.
[0019] Specifically, the mass ratio of steel slag to red mud may be 100:(70-100), preferably 100:(70-80). In practice, after crushing steel slag and red mud, it is necessary to carry out grinding operation, that is, to perform secondary crushing treatment, so that steel slag and red mud can be mixed more uniformly, among which, ball mill, jet mill or ultrafine pulverizer can be used for Crushing and grinding operations. In this embodiment, both the steel slag and the red mud are crushed to a particle size of less than or equal to 0.074 mm, so as to facilitate the subsequent pelletizing process after mixing. Due to the high viscosity of red mud, it is difficult to pelletize it alone, and its strength is not high. Aft...
Embodiment 1
[0036] 100 parts of steel slag (CaO: 32.5%), 100 parts of red mud (Fe 2 o 3 : 45.8%, Na 2O: 7.3%), 5 parts of coal (C: 72.3%, ash 14.2%) are dried at 105°C, then ground to below 0.074mm and mixed to obtain a mixture, and the mixture is pelletized, the pellet size Dry the prepared pellets at 120°C to obtain dry pellets, roast the dry pellets in a calcination furnace at 1250°C for 120min, and cool to obtain an oxygen carrier.
Embodiment 2
[0038] 100 parts of steel slag (CaO: 32.5%), 80 parts of red mud (Fe 2 o 3 : 49.1%, Na 2 O: 8.7%), 10 parts of coal powder (C: 78.7%, ash content 11.3%) were dried at 105 ° C, and then ground to 0.074mm or less and mixed to obtain a mixture. The mixture was pelletized, and the particle size of the pellets was 3mm. The pellets were dried at 120°C to obtain dry pellets. The dry pellets were roasted in a roasting furnace at 1300°C for 90 minutes, and cooled to obtain an oxygen carrier.
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