Materials and Metallurgy Related To Taconite Mining Abrasion Problems 660610
Taconite is a term applied to low grade, iron bearing deposits comprising some of the most abrasive material known to man. Large scale mining of taconite at its onset presented immense problems related to the wear of digging and haulage equipment. New concepts of design and alloy steel application were required to provide adequate serviceability of equipment parts exposed to this severe abrasion. Two cast materials, martensitic, high strength alloys having high impact properties, and 12–14% austenitic manganese steel and its variations, have provided the major developments for the actual wear parts such as dipper teeth, adapters, and shovel buckets. High strength structural steels, both cast and wrought grades, have been used extensively in the design of larger and more efficient mining equipment. Greater use of alloy steels in all phases of design is anticipated on new equipment destined for the taconite mining industry.