DEVELOPMENT AND IMPLEMENTATION OF AUTOMATED HEATING SYSTEM FOR HOLDING FURNACES IN NON-FERROUS METALLURGY

A feature of the smelting of copper-bearing ores in the Vanyukov furnace is the formation of liquid products in the form of slag and  matte melts, which, as a rule, merge into separate containers (mixer  furnaces), where it is necessary to maintain the desired temperature.  The mixer oven is a cylindrical container lined inside, closed from  both sides by end bottoms, on the one hand a burner is installed to  heat and maintain the temperature inside the container, on the other  hand, a filler neck is placed.Automated burner devices GPM-3,6 were  developed, manufactured and put into operation in slag and matte  holding furnaces at the copper-smelting plant of Almalyk Mi ning  and Metallurgical Complex (Republic of Uzbekistan). The burner  devices are designed for heating holding furnaces up to the operating temperatures of 1250  –  1275  °C and 1110  –  1150  °C respectively  and maintaining the temperature of liquid melt poured in the mixer  at the preset level at any technological operations. The automated  system provides reliable and safe operation of the burner devices,  including cold ignition, operation within the preset temperature ranges by regulation of heat loads and shutoffs, among other things in  case of emergency. Simultaneously, full information is transferred  and exchanged with the central controller of the Automated Control  System of Vanyukov Furnace through Profibus DP. The developed  burner devices fully comply with the requirements of the Technical  Regulations of the Customs Union TR TC 010/2011 On Safety of  Machines and Equipment and with the norms and rules of metallurgical production. For the gas supply of burners, a special gas ramp was  developed, which is a compact (separate) section of the gas pipeline  with all the necessary gas equipment for operation of the main and  pilot burners, both in manual control mode and in automatic mode.  The gas train includes a gas safety system. The presence of such a  ramp ensures regulation of the gas pressure to the parameters required for the operation of the main burner, smooth regulation of fuel  consumption within the stable operation of the burner, technological  accounting of gas consumption for mixer heating and safe operation  of the pilot and main burners. For air supply of the burner device,  an air ramp was also designed, which is a compact section of the air  pipe with shut-off and control valves installed on it. The composition  of the air ramp includes a swivel assembly that allows the mixer to  rotate to a certain angle for draining the melt without disconnecting  the burner air duct.

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