Improvement of Continuous Furnace Heating Modes due to Modernization of the «Pipe-in-Pipe» Burners

Fuel rate reduction is obtained due to the reduction of the overall air consumption coefficient of the furnace down to the values not exceeding 1,1. Its values in the welding zone are significantly lower (down to 1,04). As a result the oxidizing ability of the furnace gases in the working space of the furnace decreases which leads to the reduction of the metal waste.

That is confirmed by experimental investigations of the metal waste carried out by the heating engineering laboratory of the rolling plant on scale samples taken from the billet surface at the exit from the furnace, as well as by significant reduction of scale accumulation on the heating furnace bottom.

Technical and normative documents:

1. Burners reconstruction project
   — The expert's report of Gas Institute of National Academy of Sciences of Ukraine
   
   
2. ТУ У 29.2.-13495380-006-2003
   «Furnace gas burners without preliminary gas mixing of the «pipe-in-pipe» type
   — State Committee of Ukraine in standardization, certification metrology
   
   
3. Certificate of conformance # 170595 of 22.11.2004
   — UkrSEPRO
    
4. Confirmation of correspondence of modernized heaters by the normative act in energy saving problems.
   The expert's report of Territorial Administration of State Inspectorate in Energy Saving of Donetsk region.

The obtained results:

1. Implementation scope
   — Five furnaces of light-section and wire mills (natural gas - 4; natural-coke-blast-furnace gas mixture - 1)
   
   
2. Technical efficiency
   — Production increase by 10 - 15 %
   — Fuel rate reduction not less than by 10%
   — Metal waste reduction by 20 - 25 %
   — The possibility of using the gas mixture with a lower combustion value
   — The furnace service conditions improvement
    
3. Ecological efficiency
   —CO and NOx content in furnace gases meets the requirements of the corresponding standards 0,05% 250 mg/m³

Technologies and Automated Control Systems for the Processes of Sintering and Blast-Furnace Production

Technologies, Equipment and Automated Control Systems for the Processes of Steelmaking and Continuous Steel Casting

Technologies and Automated Control Systems for Rolling and Hardware Production Processes

Development of the Rolling Mill Practices for Roughing Mills

Multistrand Rolling-Slitting (MRS) is a Non-Conventional Technology of Rebars and Merachnt Bars Production

The System of Control over the Rolled Stock Cutting Process on a Continuous Billet Mill (Version 1)

The System of Control over the Rolled Stock Cutting Process on a Continuous Billet Mill (Version 2)

Firmware System for Data Acquisition and Control over the Main Drives Operating Parameters on Roughing and Continuous Billet Mills

Digital Integrated System of Control over the Main Drive of the Rolling Mill 1300 in the Blooming Shop of KRSIMMW "Krivirozhstal"

Automated Control System for Ingot Heating

System of Control over the Rolling Mill Practice and Speed Schedules of a Roughing Mill

System of Control over the Parameters of Main Electric Drives on Reversing Mills

Automated Tracking System for a Continuous Rolling Mill

Information-Calculating System "The Operator's Adviser"

Tracking System for Slabs Rolling Process on a Mill Complex "Roughing Mill - Continuous Hot Rolling Mill"

Integrated Measuring System for a Workpiece, Moving along the Processing Line of a Rolling Mill

System for Rational Workpiece Cutting on the Shears of Roughing Mills

Improvement of Continuous Furnace Heating Modes due to Modernization of the «Pipe-in-Pipe» Burners

Automated System of Control over the Heating Modes of Soaking Pits

System of Control over the High-Speed Wire Blocks Setup (ESCB)

«T-D» Technology — Improvement of the Metal Plastic Properties along with the Reduction of Mechanical Anisotropy

Complex Software for the Automated Control System of the Controlled Cooling Unit for Sheet Products

Automated Position Control System for the Screw-Down Structure of Vertical Rolls of Slabbing Mill "1150", ACS "APCS VRSDS 1150"

Upgrade of Control System for the Furnace Section of 150 Mill of CJSC «Makeevka Metallurgical Works»