Blast furnace titanium injection furnace protection material using waste flue gas denitrification catalyst and preparing method of blast furnace titanium injection furnace protection material
A technology of denitrification catalyst and waste flue gas, which is applied in the field of blast furnace spraying titanium to protect the furnace, can solve the problems of high cost and ineffective effect, and achieve the effect of reducing coke ratio, simple method and improving utilization rate
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Embodiment 1
[0038] A waste flue gas denitrification catalyst is used as a blast furnace spray titanium protective material, which is made of the following raw materials in weight percentage: 60-65% of used vanadium-titanium series waste flue gas denitrification catalyst; 35-40% of iron fine powder.
[0039]Preparation method: crush the used vanadium-titanium waste flue gas denitrification catalyst and grind it into a fine powder with a particle size of ≤-200 mesh, grind the iron fine powder into a fine powder with a particle size of ≤-200 mesh, and mix the two fine powders obtained The blast furnace protection charge is evenly prepared.
Embodiment 2
[0041] A waste flue gas denitrification catalyst is used as a blast furnace spray titanium protective material, which is made of the following raw materials in terms of weight percentage: 60% of the used plate type waste flue gas denitrification catalyst, 40% of iron fine powder; the used plate type TiO in waste flue gas denitrification catalyst 2 The content of TFe is 85%, and the TFe of the iron fine powder is 60%.
[0042] Preparation method: The used vanadium-titanium waste flue gas plate denitrification catalyst is broken into small pieces or even powder by mechanical crushing, and then the magnetic difference between the auxiliary material and the stainless steel substrate is used in the magnetic separator through a magnetic separator. Separation is carried out in the selection machine, and the main component is TiO 2 For auxiliary materials, the obtained auxiliary materials are dried in a drying equipment at 200°C for 40 minutes and then ground into a fine powder with ...
Embodiment 3
[0044] A waste flue gas denitrification catalyst is used as a blast furnace spray titanium protective material, which is made of the following raw materials in terms of weight percentage: 65% of the used honeycomb waste flue gas denitrification catalyst, 35% of fine iron powder; TiO in Honeycomb Waste Flue Gas Denitrification Catalyst 2 The content of the iron powder is 90%, and the TFe of the iron fine powder is 62%.
[0045] Preparation method: crush the used vanadium-titanium waste flue gas honeycomb denitrification catalyst to obtain TiO as the main component 2 The auxiliary material, and then grind the auxiliary material into a fine powder with a particle size of -220 mesh, and grind the iron fine powder into a fine powder with a particle size of -220 mesh, and mix the two obtained fine powders in a mixing cylinder for 35 minutes until uniformly obtained. Blast furnace protection material.
[0046] Using vanadium-titanium waste flue gas denitrification catalyst as the r...
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