Electric arc furnace.

Electric arc furnace is a powerful and highly automated aggregate. There is minimized the duration of melting. This allows the most efficient use of working time furnace. The operating principle is furnace refers to three-phase electrical furnaces direct acting with dependent arc. Thermal work varies at different stages of melting. Furnaces are equipped with tracking devices for the progress of melting.

Type of steel A500C was reviewed in that graduate works. Reinforcing steel used in the production reinforced concrete structures. Durability of fittings depends of chemical composition of steel and nature of the treatment. Chemical composition of the steel A500C

Elements	С	Si	Mn	P	S	Cr	Cu	N
Requirements, %	0,22-0,28	0,15-0,35	0,40-0,70	No more 0,040	No more 0,020	No more 0,30	No more 0,30	No more 0,12

Steelmaking technology.Steelmaking consists of several stages:· refuelling furnaces· filling furnace· melting of charging material:1. strikes the arc2. closed arcing3. open arcing· oxidation period· recovery melting Research on the relationship between thermal and electrical conditions. In periods of electric arc process is determining the temperature regime workspace chipboard. Controlling system mode of annealing for choose the maximum amperage and voltage with allowances made for limitation on the temperature for every stage melting. For reseach on the relationship between thermal and electrical conditions was made calculation performance of electric arc furnace. Arc Furnace as an object of automatic thermal mode. Control of the thermal load on the furnace includes of the following stages:1. manipulating thermal load of the walls stoves2. monitoring burnout of bottom furnace3. control of consumption cooling waters4. monitoring of metal temperature For local system thermal mode on electric arc furnace was madebased functional diagram. Witch shows used for monitoring and controlling the progress of melting of the measuring device, signal conversion device, a microcontroller, and also shows the exchange of information between them. Also was developed algorithm and user interface. Conclusion. · The development of the local system thermal mode on electric arc furnace, taking into account the distribution of the heat flows in the furnace;· Been calculated and study the performance of the furnace;· A functional diagram of the local system thermal management electric arc furnace hardware specification and a list of signals;· An algorithm thermal management chipboard;· Improved technical and economic performance can be achieved by improving the local management;

Дата добавления: 2015-10-30