The main copper mineral ore was Konkola chalcocite, bornite, chalcopyrite followed. Therefore, its concentrate is characterized by high copper, low sulfur, low iron and high silicon, and contains cobalt minerals, so it must be equipped with pyrite and lime during smelting. However, these features make it ideal for pressure leaching. Konkola deep ore accounts for 22% of the copper minerals bornite, chalcocite 18%, 11% chalcopyrite, covellite 5%, mainly gangue potassium feldspar (19%), quartz ( 8% ) and mica . Cobalt mainly coexists with copper minerals.
South Africa's Anglo-american Ami Laboratory (AAC) was commissioned to smelting Konkola mine, combined with the use of hard Nchanga rule of mine, we put forward a joint wet process acid to maintain a balance between supply and demand of ^[1], The flow chart is shown in the figure below.

AAC 's experiments took a total of six different Chinkel refractory samples, one of which was listed in the table below along with the Concord concentrate samples. After a sufficient small experiment, a continuous intermediate factory experiment was carried out according to the above flow chart, and the scale was 4kg /h concentrate and 2kg /h difficult to mine. The oxidant is pure oxygen. The two-stage atmospheric leaching conditions for sulfide ore leaching and difficult smelting are shown in the following table .