Process and arrangement for operating a double furnace installation

A steel making plant, comprising:

• a power supply;
• a double furnace arrangement including:
• two furnaces having furnace vessels with top vessel parts, covers for closing the furnaces, a gas purification installation, flue gas elbows connecting the covers to the gas purification installation, a connection line directly connecting together the two furnaces and opening into the top vessel parts, the connection line having a radial separation which separates the connection line into two parts and permits independent tilting of the connection line parts and independent radial movement of outlets of the connection line, a sliding sleeve arranged so as to enclose the radial separation, and means for closing the separation in a gas tight manner, the closing means including a shut-off device arranged in the connection line on each side of the separation;
• a power supply having a single main power feed, the power supply being connected to the two furnaces;
• and electric switching means for completely severing one furnace from the power supply so as to enable an unimpeded operation of the other furnace.

A double furnace arrangement, comprising:

• two furnace vessels;
• covers for closing the furnace vessels;
• a gas purification installation;
• flue gas elbows connecting the covers to the gas purification installation;
• a connection line directly connecting together the two furnace vessels, the connection line having a radial separation which separates the connection line into two parts and permits independent tilting of the connection line parts and independent radial movement of outlets of the connection line;
• a sliding sleeve arranged so as to enclose the radial separation;
• and means for closing the separation in a gas tight manner, the closing means including a shut-off device arranged in the connection line on each side of the separation.

A double furnace arrangement, comprising:

• two furnace vessels;
• covers for closing the furnace vessels;
• a gas purification installation;
• flue gas elbows connecting the covers to the gas purification installation;
• a connection line directly connecting together the two furnace vessels, the connection line having a radial separation which separates the connection line into two parts and permits independent tilting of the connection line parts and independent radial movement of outlets of the connection line;
• a sliding sleeve arranged so as to enclose the radial separation;
• means for closing the separation in a gas tight manner, the closing means including a shut-off device arranged in the connection line on each side of the separation;
• combustion energy supply means;
• and burners connected to the combustion energy supply means and arranged so as to project into an upper part of the double furnace.

A double furnace arrangement comprising:

• two furnace vessels;
• covers for closing the furnace vessels;
• a gas purification installation;
• flue gas elbows connecting the covers to the gas purification installation;
• a connection line directly connecting together the two furnace vessels, the connection line having a radial separation which separates the connection line into two parts and permits tilting of the connection line parts and independent radial movement of outlets of the connection line;
• a sliding sleeve arranged so as to enclose the radial separation;
• and means for closing the separation in a gas tight manner, the closing means including a shut-off arranged in the connection line on each side f the separation, the furnace vessels each have a bottom vessel, part, the connection line opening into a region of the top vessel part of each furnace vessel that slopes toward the bottom vessel part, the connection line having outlets at an outer edge of the vessel parts that is arranged diagonally to an outlet of the flue gas elbows of the covers.