Extraction of Nickel. This paper introduces the extraction of nickel process and characteristics of laterite nickel ore dressing washing in the nickel production process design.. 1 Description of nickel ore. The laterite nickel ore is complex in composition and can be roughly divided into two types: limonite type and silicon magnesium-nickel type.The machining of nickel and nickel-base alloys can be readily accomplished providing fundamental principles affecting their machinability are understood and taken into consideration. Compared to other materials,