The Tongling Jinchang Smelter smelting lean slag containing copper has achieved success

The important index of the smelting recovery rate of Tongling Nonferrous Metals Jinchang Smelter, each 0.01% reduction in slag copper content, can restore direct economic losses of several hundred thousand yuan, and the energy saving and consumption reducing effect is significant. Therefore, last year, the Jinchang Smelter Melting Workshop took one of the research projects to reduce copper content in smelting-lean slag, and actively carried out research activities to achieve good results.

The scientific analysis of the copper content of the smelting smelting slag affected by the depleted electric furnace is based on the factors that affect the inclusion of copper in the slag. It actively seeks for countermeasures and measures, starting with the operation management and technological improvement, and implementing the research and implementation activities. According to the target level of copper matte, the slag type should be reasonably controlled, and the iron-silicon ratio should be controlled within a reasonable range so that the viscosity of the slag is appropriate, the fluidity is normal, and the temperature of the rinse is moderate. According to the main components of the material into the furnace, controlling the appropriate ratio of wind and material, both to prevent excess oxygen, the emergence of peroxide slag, but also to prevent the lack of oxygen resulting in monomer sulfur. During the operation, the real-time monitoring of the temperature fluctuation curve of the furnace is strengthened, and the heavy oil, coal addition amount and oxygen concentration are adjusted in time so that the Austrian furnace furnace is stably controlled within a certain range and the melt fluidity is ensured. At the same time, the copper slag and slag working surface are controlled on the specified working surface to ensure the time and effect of slag copper clarification and separation.

Due to the excessive thickness of the diaphragm and the furnace junction in the depleted electric furnace, the copper content of the depleted electric furnace slag is too high. By strengthening the raw material management of the furnace and adjusting the slag composition of the depleted electric furnace, the plant promptly restores the furnace and optimizes the depletion furnace. A series of improvement measures, such as operation parameter control, control the thickness of the diaphragm and the furnace junction in the electric furnace, and increase the effective capacity of the electric furnace.

After continuous exploration of practice and technological breakthroughs, at present, the copper content in the smelting furnace of smelting lean slag is steadily controlled below 0.65%, and the research activities have achieved remarkable economic benefits.

Source: Tongling Nonferrous News