Technical Application of Weightlessness Scale in Multi-hearth Furnace Feeding Program
In principle, the processing of molybdenum concentrate is a whole process of oxidation-reduction reaction, and it reflects that the natural environment is very critical to the actual operation of the processing technology. On the one hand, the double-layer furnace of the multi-hearth furnace presents a relatively stable natural environment for molybdenum oxide burning, and on the other hand, when the raw material is added, the main parameters of the processing process such as the air pressure in the furnace, the reflected temperature, and the amount of gas supply When the relative stability is maintained, the balance of raw materials and calorific value can be maintained during the whole roasting process, and the stability and firmness of the product quality can be relatively ensured. A gold and molybdenum enterprise has two multi-hearth furnaces for the supply of raw materials. In addition to the molybdenum concentrate produced and sold by the company, a small part of the key raw materials are self-purchased molybdenum concentrates. The taste and impurities of the molybdenum concentrate raw materials Generally relatively stable, with small fluctuations. At this time, the precise control and smooth addition of raw materials during the processing of the two multi-hearth furnaces seem to be very critical. Therefore, designing a plan and selecting a set of suitable molybdenum concentrate characteristics, high level of automation technology, accurate measurement and verification, stable and firm raw material supply and demand balance loss-in-weight scale will become a key manufacturing stage of the multi-hearth furnace feeding control system. The weightless feeder scale is a raw material supply equipment, which applies dynamic control system and is equipped with dynamic weighing controller to adjust the operating speed of the extruder screw, feeder, pump and other electric actuators in real time. To control the total flow of the feeder, also known as the constant total flow feeder, it is widely used in the continuous feeder production line of the manufacturing industries such as rubber and plastic insulation boards, chemical plants, food, steel and non-ferrous plates, and weightless feeding. The launch of the machine scale feeder system software can not only improve the accuracy, reliability and robustness of the feeder, but also greatly improve the operating efficiency of the processing plant, reduce the labor efficiency of the actual operators, and write more for the company The economic benefits and social economic benefits. The software of a typical weightless scale system consists of weighing hopper, driver and feeder equipment, weighing sensor, replenishing valve, driver control board, module, configuration control module (optional) and actual operation control panel (optional) ) And other components. In this system software, according to the characteristics of raw materials and the specific conditions of the production system of Jinmo Co., Ltd.'s multi-hearth furnace, the system software does not configure hoppers and replenishing valves, and the control system design starts from the weighing hopper. The raw materials have been air-dried through the upstream and downstream molybdenum concentrate preparation processing system software, which promotes the moisture content of the molybdenum concentrate to be less than 5%, and then is transferred to the weightlessness scale system software through belt conveyors, bucket elevators and other conveying mechanical equipment.