Aluminum is often added to electrical steels since this element causes improvement of the magnetic properties. However the addition of aluminum is usually limited to 0.30 wt% 1 . Therefore, this work aimed at evaluating the influence of higher levels of aluminum in the magnetic properties of semiprocessed steels. To accomplish this, four types of steel were produced in laboratory with different aluminum contents (0.10, 0.30, 0.60 and 1.0 wt%). Carbon, manganese and silicon concentrations were kept constant. It was observed that an increased aluminum content caused reduction of the magnetic core loss, especially of the eddy current component. However, the magnetic permeability virtually wasn't influenced by aluminum concentration.

Pyrolysis is one of the most effective, economic and useful ways to produce bio-oil in the absence of oxygen. This article presents a study about the production of bio-oil from pyrolysis of waste potato peel and rice husk.This study aimed to evaluate the influence of the average particle size of the waste potato peel, and compare the results with another raw material, the rice husk. Three particles size were analyzed: (a) 0,500<Ø<1,400 mm, (b) 1,400<Ø<3,350 mm, and (c) Ø>3,350 mm. The best result with liquid (water and bio-oil) was 29.18% and it was obtained from the smaller particle size. The results obtained from potato peel and rice husk were compared for grain sizes (a) and (b). It was observed that the rice husk with the smaller size is more effective for bio-oil production (44.29% of liquid). However for the large particles sizes, the most effective raw material was the potato peel presenting a result of 27.74% of liquid