MBT schuhe Günstig Zinc wire billet continuous ca

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Zinc wire billet continuous casting process and temperature control

41 children arts and temperature control relatively large thermal inertia, the actual temperature control accuracy less likely to cause overheating, resulting in zinc oxide dust and energy waste. In order to ensure constant temperature oven, we have melting furnace, holding furnace temperature control means to switch SCR power type P1D (proportional integral differential) controller, the temperature fluctuation range down to the 1 ~ 5E. Improved melting furnace, holding furnace electrical control principle shown in Figure 2. Figure 2 melting furnace, holding furnace electrical control schematics melting furnace, holding furnace is the inductive load, when the voltage or current letter of closed-loop control, closed-loop voltage fluctuations in the power A, the material had access to equal zero, SCR Power Regulator The letter issued by zero trigger circuit can be caused by inhibition of temperature perturbation. ,[link widoczny dla zalogowanych], Trigger SCR conduction, avoiding the SCR trigger signal at a small angle of conduction failure. The power regulator less demanding on the environment, control is relatively simple,[link widoczny dla zalogowanych], easy to implement. The principle is to control, through the zero voltage or current is sent each time the trigger signal to control the set period the number of voltage or current cycle, get the power to change the load. Changes in signal voltage and current waveforms shown in Figure 3. The average load power P can be obtained under the style \SCR in the set period for a full turn flows through the load when the current value of the effective power in the SCR device withered P1D as the executing agency in the self-adjusting system with turn-Frequency PIT) adjust the size of the output signal proportional to the change. When the regulator output and the temperature deviation as Pl】] relations, electric power transmission also will be eight temperature deviations as Pl】] the relationship between changes in temperature in order to achieve the PIt) regulation. Temperature PII] section automatically block diagram shown in Figure 4 withered. P1D automatically adjust the system temperature changes of temperature in Figure 3, the formation of silicon output voltage and current waveforms in Figure 4 crystal, straightening, pulling and winding and winding lead crystal straightening Zhang (see Figure 5) is a zinc wire blank key process of continuous casting production line. On the crystallization,[link widoczny dla zalogowanych], straightening, pulling and winding the correct operation, to ensure continuity of production and reduce the loss of consumables, reduce production costs. To ensure the normal zinc wire billet casting, you need to control the following aspects: 1) the strength of the mold cooling liquid cooling intensity of zinc in cooling water by regulating the flow or pressure to achieve. Cooling water system 42 in Hong Grub full in August 2001 addition of the third period of the booster pump. 2) The speed traction traction traction is provided by intermittent, with some breakthrough role (cam), the purpose of the zinc and mold liquid crystal speed consistent. Excitation motor speed using the initiative as a tractor, according to the crystallization of zinc wire stock, adjusting the speed traction crystallization rate to ensure synchronization with the billets. Traction and cooling water to adjust the cooling intensity, can ensure normal production of zinc wire billets, and high quality. Manual control of the material out of power fluctuations in Figure 4 melting furnace, holding furnace temperature holding furnace temperature control schematic disabilities oo (zinc marks). ((= Figure 5 crystal, straightening, a chain; 5 results melting furnace, holding furnace replaced by SCR power control system based P1D temperature after the energy saving, environmental protection and product quality have a significant effect. 51 Energy Conservation and environmental improvement before the operator is sometimes blocks to speed up melting of zinc increase the set temperature, coupled with fluctuating temperature, actual temperature higher, not only waste energy, but also accelerated the oxidation of liquid zinc to produce zinc oxide dust, zinc oxide in the workshop serious fly ash filled the air, polluting production environment. improvements, the furnace temperature fluctuation is very small, to avoid overheating due to energy loss, energy consumption per ton decreased by 10% - 15%; the phenomenon of zinc oxide aquatint c-what has been basically eliminated. 52 product quality improvement before, by f melting furnace,[link widoczny dla zalogowanych], holding Die wide temperature fluctuations of r is too large,[link widoczny dla zalogowanych], crystallization temperature of liquid zinc inconsistent, resulting in uneven hardness of zinc wire billets, easily broken when brushed., Schematic diagram of the improved winding process, melting furnace, holding furnace temperature is almost constant and uniform hardness zinc wire stock, the yield increased by 45%. 6 Conclusion zinc wire billet continuous casting production line put into operation for the development of Zhejiang Metallurgical Research Institute pure zinc products to create the conditions for the series, to better meet the market demand for pure zinc wire. electric power using SCR type PID control system, the temperature reached a high quality, lower energy consumption, improve product quality. winder tension has not been carried out through the automatic control of stock, to be improved. References [l Lee】 temperature are jealous, but the table should be edited and thermal control. Beijing: China Machine Press】 98 284 ~ 85 2 ~】】】】 3 Received Date :200106-28 Reviewer: Ye Qiren Editor: Wu root soil
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