Experimental study on slag splashing with modified vanadium slag

Abstract

Slag splashing is the most effective technology to improve the furnace campaign of converter; however, due to the great difference of composition between the vanadium slag and the steel slag, the technology has not been applied in the vanadium extraction converter. To solve the serious problem of lining erosion in the vanadium extraction converter, in this paper, slag splashing with modified vanadium slag was studied. The results showed that the purpose of adjusting the state of vanadium slag can be achieved through the modification. The modified slag had good slag splashing performance. After slag splashing, the thickness of the furnace was increased by more than 10 mm. The content of CaO in the modified vanadium slag can be controlled less than 3%, and the quality of vanadium slag and semi-steel was not obviously affected. The metallic iron content in the slag was greatly reduced, which was beneficial to reduce the iron loss in the vanadium extraction process.

Physical and Numerical Modeling of the Slag Splashing Process

“…Nonetheless, this practice is common in modeling metallurgical processes, including slag spattering. [ 1 , 2 , 3 , 4 , 5 , 6 , 12 , 13 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ].…”

Crystallization behaviour and growth mechanisms of spinel crystals in vanadium slag with high MgO content

“…Excessive calcium oxide content in the slag leads to the formation of many insoluble calcium vanadates or vanadium bronzes, which reduces the recovery of vanadium by leaching. 4 If the content of SiO 2 in the slag is too high, it will generate water-soluble Na 2 SiO 3 , which will resolve the gel in the leaching, block the filter and hinder the leaching of vanadium. If the content of P 2 O 5 in the slag is too high, it will generate water-soluble phosphate, which will affect the precipitation of vanadium and reduce the purity of vanadium products.…”

Study on Slag Splashing Behavior in a 120 t Converter Based on Physical and Mathematical Simulation

“…[1,2] The application of slag splashing technology can extend furnace lining life, decrease refractory consumption, and enhance the converter utilization rate, which holds significant practical significance and socioeconomic benefits. [3][4][5] Slag splashing technology refers to the process of retaining a portion of the slag after pouring the molten steel out of the converter, modifying it with additives to produce high melting point compounds. Then, using highspeed nitrogen gas from the top, the modified slag is sprayed onto the refractory lining to form a protective layer, and the excess slag is subsequently discharged.…”