Abstract: Copper smelting slag is a kind of secondary resource with high iron,in order to solve many problems caused by its stockpiling and realize its high-value comprehensive utilization,the study carried out a test of synthesizing ferro-phosohorus by carbothermal reduction method using a certain copper smelting slag and phosphorus ore in Guangxi as iron and phosphorus sources. The results showed that for the copper smelting slag with Fe content of 46. 28% and main mineral phases of Fe2 SiO4 and Fe3O4 ,and the phosphorus ore with P2O5 content of 33. 41% and main phase of Ca5(PO4 )3F,the synthesis of ferro-phosphorus by carbothermal reduction method was carried out in the following conditions:the mass ratio of iron and phosphorus in raw material was 1. 0,the dosage of graphite in reduce was 1. 0 times of the theoretical value,the mass ratio of borax,flux,to the raw material was 6%,the mass ratio of binder methylcellulose to the raw material was mass ratio of 0. 4%,system pressure of 0. 1 MPa,temperature of 1 600 ℃ ,P,Fe average grade of 16. 59% and 81. 10% of high-quality ferro-phosphorus products could be obtained,at the same time,reduced slag of the main phase of Ca2 SiO4 ,which could be used as raw materials for the production of cement,and achieve the recycling of resources. 

Key words: copper smelting slag,phosphrus ores,carbon thermal reduction,ferrophosphorus