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. 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 Typical composition of Concora concentrate and Chinko Laiye Ingredient % Cu Co Fe Al Mg Ca Mn Ni Si Zn CO 3 S Concora concentrate 41.44 0.4 6.51 3.01 0.88 0.35 0.02 <0.01 10.22 <0.01 2 About 15 Difficult to mine 1.03 0.06 0.94 5.26 3.48 0.58 0.14 <0.01 29.7 0.02 2.48 　 Concord process pilot leaching conditions mineral Process Temperature / °C Residence time / h Total pressure / kPa Oxygen partial pressure / kPa Sulfide ore Decomposition of carbonate 65 3 2300 700 　 Pressure leaching 200 1 Difficult to mine a constant pressure 30 2 　 Two-stage atmospheric pressure 65 6 The figure below shows the average concentration distribution of copper, iron, diamond and free acid at each sampling point when the leaching process reaches steady state. Sampling points 1 and 2 are the components before and after the decomposition of carbonate. When acid is added, both copper and iron are obviously dissolved, and the free acid rises to    These results indicate that the iron leached in the kettle is quickly oxidized, hydrolyzed, and then precipitated. The precipitate includes basic sulfates of hematite and iron. The acid is mainly consumed in the leaching reaction of copper and cobalt. The analysis of the solid sample shows that the copper has been leached at about 40 mim , and the cobalt leaching takes 60 minutes to complete. The order of leaching of copper minerals is: porphyrite > chalcopyrite > copper blue > chalcopyrite. The Slip on Flange is the flange of steel pipe with neck, which is the flange connecting steel pipe, pipe fittings and so on into the flange through fillet weld. The neck height of the flat welding flange with neck is lower, which improves the stiffness and bearing capacity of the flange. Slip On Boss Flange,Slip On Plate Flange,Slip On Hubbed Flange,Slip On Puddle Flange Jinan Xintai Forging Co., Ltd , https://www.xtdzflange.com
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. 
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Sulfide ore acid leaching - Concord process