1, the task of operation in front of the furnace, using special equipment and various tools such as tapping machine, clay
1, the task of operation in front of the furnace, using special equipment and various tools such as tapping machine, clay gun, slag stopper, etc. , according to the specified time, respectively open the slag port and the taphole (now the slag port and the taphole are combined into one), discharge slag and iron, and flow into the slag port and the taphole through the slag port and the taphole respectively. After the slag and iron are discharged, block the slag port and the taphole to ensure the continuous production of the blast furnace. Complete the maintenance of slag tapping, taphole and various special equipment in front of the furnace. Manufacture and repair skimmers, main tapholes and slag iron ditches. Replacing air, slag port and other cooling equipment, cleaning slag iron transportation line and a series of slag-related work.
2. Basic operating system of blast furnace: stable and smooth operation of blast furnace: generally, it means that the burden in the furnace drops, the gas flow rises evenly, the furnace temperature is stable and sufficient, and the pig iron is qualified, so as to achieve high yield and low consumption.
3. Operation system: According to the specific conditions of blast furnace (such as blast furnace type, equipment level, raw material conditions, production plan, variety index requirements, etc.), the operation criteria of blast furnace are formulated.
4. Basic operating system of blast furnace: charging system, air supply system, hearth heating system and slag tapping system.
5. Blast furnace, ironmaking shaft furnace with circular section. Steel plate is used as the furnace shell, and refractory brick lining is built in the furnace shell. Blast furnace body is divided into throat, shaft, waist, belly and hearth from top to bottom. With the advantages of good technical and economic indicators, simple process, large output, high labor production efficiency and low energy consumption, the iron produced by this method accounts for the vast majority of the world's total iron output. In the process of blast furnace production, iron ore, coke and slag-making flux (limestone) are loaded from the top of the furnace, and preheated air is blown in along the furnace circumference from the tuyere located at the lower part of the furnace. Carbon in coke at high temperature (some blast furnaces also inject auxiliary fuels such as pulverized coal, heavy oil and natural gas). ) burns with oxygen blown into the air to generate carbon monoxide and hydrogen, and the oxygen in the iron ore is removed in the process of rising in the furnace, thus reducing to obtain iron. The molten iron is discharged from the taphole. Unreduced impurities in iron ore combine with fluxes such as limestone to form slag, which is discharged from the slag outlet. The generated gas is discharged from the top of the furnace and used as fuel for hot blast stoves, heating furnaces, coke ovens and boilers after dust removal. The main products of blast furnace smelting are pig iron, as well as by-products blast furnace slag and blast furnace gas.
6. The blast furnace hot blast stove is the equipment for heating and blowing blast furnace, and it is an indispensable part of modern blast furnace. Increasing the air temperature can be achieved by increasing the calorific value of gas, optimizing the structure of hot blast stove and air supply pipeline, preheating gas and combustion air, and improving the operation of hot blast stove. Theoretical research and production practice show that adopting optimized hot blast stove structure, improving hot blast stove thermal efficiency and prolonging hot blast stove life are effective ways to improve air temperature.
7. Hot metal tank car, which is used to transport hot metal, realize the transfer of hot metal between desulfurization span and charging span or put it under the mixer for blast furnace or mixer tapping.