UTILIZATION OF BIO-OIL OR BIOCHAR IN A BLAST FURNACE
In various examples, the subject matter of this disclosure relates to a method and a system for reducing iron oxide to produce metallic iron. An example method includes: providing a fuel including at least one of bio-oil or fast pyrolysis biochar, feeding the fuel into a blast furnace containing iron oxide; gasifying the fuel to produce reducing gases; and reducing the iron oxide in the blast furnace using the reducing gases to produce metallic iron.
1 . A method of reducing iron oxide to produce metallic iron, the method comprising:
providing a fuel comprising at least one of bio-oil or fast pyrolysis biochar;
feeding the fuel into a blast furnace containing iron oxide;
gasifying the fuel to produce reducing gases; and
reducing the iron oxide in the blast furnace using the reducing gases to produce metallic iron.
2 . The method of claim 1 , wherein the fuel comprises the bio-oil.
3 . The method of claim 2 , wherein the bio-oil comprises a water content less than about 10%, by mass.
4 . The method of claim 2 , wherein the bio-oil has a coke replacement ratio from about 0.7 to about 1.
5 . The method of claim 1 , wherein the fuel comprises the fast pyrolysis biochar.
6 . The method of claim 5 , wherein the fuel further comprises bio-oil.
7 . The method of claim 5 , wherein the fuel further comprises coal.
8 . The method of claim 5 , wherein the fuel further comprises slow pyrolysis biochar.
9 . A system for reducing iron oxide to produce metallic iron, the system comprising:
a source of a fuel comprising at least one of bio-oil or fast pyrolysis biochar; and
a blast furnace configured to:
gasify the fuel to produce reducing gases; and
reduce iron oxide using the reducing gases to produce metallic iron.
10 . The system of claim 9 , wherein the fuel comprises the bio-oil.
11 . The system of claim 10 , wherein the bio-oil has at least one of a water content less than about 10%, by mass, or a coke replacement ratio from about 0.7 to about 1.
12 . The system of claim 9 , wherein the fuel comprises the fast pyrolysis biochar.
13 . The system of claim 12 , wherein the fuel further comprises bio-oil.
14 . The system of claim 12 , wherein the fuel further comprises at least one of coal or slow pyrolysis biochar.
15 . The system of claim 12 , wherein the fuel comprises a liquid, a slurry, or a paste.
16 . The system of claim 9 , wherein the system further comprises a plurality of lines configured to feed the fuel to a plurality of tuyeres in the blast furnace.
17 . The system of claim 9 , wherein the system further comprises a ring-shaped manifold disposed around the blast furnace and configured to feed the fuel to a plurality of tuyeres in the blast furnace.