Community Research and Development Information Service - CORDIS


LD slag is a byproduct of the iron and steel industry which comes from pig iron refining processes using LD convertors, and which can be used as a substitute for aggregates in civil engineering projects. However, its high free lime content which causes problems with its dimensional stability means that its uses are limited. Nevertheless, this feature, along with the absence of significant levels of heavy elements and lack of toxicity mean that it can be used as liming material on acid soils, thus improving productivity. This work describes the results from test plots where LD slags have been used on acidic soils set aside for cereals, grazing or forestry. The results show that by adding a concentration of slag of between 1.5 and 5.0 ton/hectare (according to soil type and agricultural use) it is possible to achieve a proportional increase in the soil's pH, to increase interchangeable calcium and magnesium contents, and to lower aluminium content. The end results is an improved quality and soil productivity. Finally it has been demonstrated that fertilizing materials produced by mixing slag with a series of essential nutrients give highly satisfactory results for the different types of crops studied.

Additional information

Authors: FORMOSO A, CENIM, Madrid (ES);LOPEZ F A, CENIM, Madrid (ES);MEDINA F, CENIM, Madrid (ES);BALCAZAR N, CENIM, Madrid (ES)
Bibliographic Reference: EUR 15591 ES (1996) 54pp., FS, ECU 8.50
Availability: Available from the (2)
ISBN: ISBN 92-827-5555-X
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