C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
165/1, 53/354
C21B 7/22 (2006.01) C21B 3/04 (2006.01) C21B 7/00 (2006.01) C22B 7/02 (2006.01)
Patent
CA 1209345
"Method for treating blast furnace gas and apparatus for carrying out that method" ABSTRACT OF THE DISCLOSURE Blast furnace gas containing dust particles has the coarsest particles removed and the result wet scrubbed before being fed to a treatment apparatus for separating the remaining coarse dust, which has a low lead and zinc concentration. The gas dust is fed to a separator in the form of a thickener where coarse particles are removed through an outlet whilst the remaining gas dust is fed to a settling basin. This concentrates the dust particles before they are fed via pipe to a second separator having two hydrocyclones. Here the coarse particles are removed via pipe. The coarse particles from the outlet and pipe are suitable for feeding to a blast furnace as they are low in lead and zinc. The presence of the settling basin gives a more distinct separation if the dust particles by the hydrocyclones and the hydrocyclones can operate more efficiently.
427215
Heijwegen Cornelis P.
Kat Willem
Hoogovens Groep Bv
Ridout & Maybee Llp
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