The document discusses the function and structure of a blast furnace, which reduces iron oxides into liquid iron through a process involving iron ore, coke, and limestone. It outlines the operation steps and by-products, including molten iron and slag, with additional details about the furnace’s design and material flow. The presentation aims to provide a comprehensive understanding of the manufacturing process in a blast furnace.

1. 4/18/20203:43PM
1
SEMINAR TOPIC ON
BLAST FURNACE
PRESENTED BY:-
MR.MD.RAZA ANSARI
ASST.PROF. MECHANICAL ENGG.
MANOJ KUMAR SAHU REG.NO. 1101224146

2. INTRODUCTION(BF)
 The purpose of a blast furnace is to reduce
and convert iron oxides into liquid iron
called "hot metal".
 The blast furnace is a huge, steel stack lined
with refractory brick.
 Iron ore, coke and limestone are put into the
top, and preheated air is blown into the
bottom.

3. WHAT IS A BLAST FURNACE
The raw materials are:
 It is a tall cylindrical furnace
made of steel.
 It is lined inside with fire bricks.
 It is narrow at the top and has an
arrangement for the introduction
of ore and outlet for waste gases.
 Heated with help of Hot Gases.

4. MATERIAL FLOW DIAGRAM FOR BLAST FURNACE
Stove of
BF
Charging
Section
of
Blast
Furnace
Pig Casting
M/C
Mixer of
SMS 1
Blast Furnace
Hot Metal
Iron Ore
Lime Stone
Mn Ore
Sinter
Coke
Hot air
Quartzite

5. A VIEW OF BLAST FURNACE

6. A CLOSER VIEW OF BLAST FURNACE

7.  The iron oxide of ore and sinter is reduced to iron with
the help of carbon monoxide & Coke
 Functions of coke in BF are manifold. It provides strong
porous bed to burden and supplies the heat load. Part of
the heat load is supplied by the hot air blast
 1 Furnaces of 2000 cubic meter useful volume and
2640T/day capacity
 All furnaces have Bell-less Top charging System for
continuous charging & better distribution of charge
 Hot Metal Temperature 1460-14800C

9. Step 3 - Carbon dioxide produced in the first 2 reactions reacts with excess coke and forms carbon mono
xide.
Step 2 - Coke reacts with oxygen and forms carbon dioxide.
Step 5 - The excess limestone from the second reaction reacts with the sand (coming from
minerals in iron ore) and forms calcium silicate (slag) .
Step 1 - Insert iron ore, limestone, and coke into blast furnace.
Step 6 - Slag and molten iron are drained from the bottom of the furnace and gas produced
exits through holes in the top of the furnace .
Step 4 - Carbon monoxide reduces iron ore and produces molten iron.

10. Products formed
 Both the slag and iron are drained from the bottom
of the furnace.
 The slag is mainly used to build roads.
 The iron whilst molten is poured into moulds and
left to solidify - this is called cast iron and is used to
make railings and storage tanks.
 The rest of the iron is used to make steel.

11. THANK YOU