Taking the rich laterite nickel ore resources in Southeast Asia as an example, the water content of laterite nickel ore is dried to a certain extent, blended, and granulated by a mixer. Through a series of complex processes and eliminate harmful impurities such as sulfur and phosphorus in the ore.

In the steel plant, the oxygen in the sintered ore is removed through high temperature, and iron is obtained by reduction. At the same time, water slag and gas are by-produced. Then the nickel iron is transported directly to the steel plant by rail car for the next process. The primary furnace uses high-pressure oxygen as an oxidant to oxidize the elements and impurities in the molten iron by using waste water, scrap steel and cast iron blocks, and then smelt them into stainless steel billets through a series of physical and chemical reactions.

The stainless steel billet is sent to the hot rolling plant to undergo dephosphorization, rough rolling, and finish rolling after 1200 degrees Celsius. Finally, the stainless steel black-skin steel coil is coiled, and then the black-skin steel coil is sent to the pickling plant for pickling. Pickling should heat the stainless steel to a certain temperature, reduce the hardness, improve the machinability, and the annealing treatment will soften the steel structure, thereby improving the steel’s plasticity and corrosion resistance. Remove some oxide scale on the surface through pickling passivation And rust, make the surface form a dense oxide film, which is also the most important feature of stainless steel different from ordinary steel.