A procedure for the production of arrabio starting from iron minerals even piritas, and using lower quality charcoals and the electric oven of reducing low cuba in which it is obtained (Machine-translation by Google Translate, not legally binding)

摘要

A process for the production of pig iron starting from iron ore including pyrites and using lower quality coals and the electric furnace for reducing the vat in which it is achieved characterized by the fact that the duly prepared load is lifted and carried in baskets by a bridge-crane to through feeder hoppers and conveyor threads, a loading carousel and central and lateral loading tubes into the electric furnace of the lower tank where the electrodes penetrate deeply (from one to two meters) into the cargo at whose distance from the surface it is the reaction center and when the load is lowered towards this reaction center, it undergoes a previous heating and at the same time its reduction is carried out by the reaction gases since the carbon oxide produced is combined with the oxygen of the mineral to carbon dioxide. In this focus, the temperature reaches its highest value because the arc here burns in multiple branches and when the current searches its way from one electrode to another through the load the resistance opposite by this has the effect of increasing the temperature by adding to the heat action of the arch. From the reaction point towards the surface of the load, the temperature gradually decreases to about 200 to 300º c. By reaching the temperature for the production of pig iron from 1100 to 1200ºC and the material forming the load can not agglomerate, there is no danger of forming vault in the same and allowing thus to have in this type of oven a tight lid to the gases that are produced and that by absence of the blown air are very rich in co with a heat power of about 2800 kcal/m3 per ton of pig iron produced and they are caught by tragagants arranged in said lid for their subsequent use. (Machine-translation by Google Translate, not legally binding)