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采用矿相显微镜及XRD研究了不同温度条件下连铸保护渣矿相结构的变化。结果表明,在本实验条件下的降温和升温过程中,连铸保护渣的结晶化率均随实验温度的升高而下降,结晶矿相主要为枪晶石、硅灰石、黄长石。枪晶石在1000℃和1200℃时结晶能力最强,1300℃时无枪晶石析出。硅灰石只在1000℃时析出,晶体发育程度很高。黄长石晶体在1300℃时发育良好且光学性质明显,1000℃和1200℃时生长缓慢,为细小的颗粒状雏晶。在相同的实验温度条件下,连铸保护渣在升温过程中结晶化率高、晶体细小、结构致密,降温过程中其晶体发育程度良好、晶体粗大。
The changes of mineralogical structure of continuous casting mold slag under different temperature conditions were studied by means of microscope and XRD. The results show that during the process of cooling and heating under the experimental conditions, the crystallization rate of continuous casting mold slag decreases with the increase of experimental temperature. The main crystalline phases are gunite, wollastonite and yellow feldspar. Gun spar in the 1000 ° C and 1200 ° C crystallization ability of the strongest, 1300 ° C without gunslip precipitation. Wollastonite precipitates only at 1000 ℃, the crystal is highly developed. The crystal of the feldspar grows well at 1300 ℃ with obvious optical properties. It grows slowly at 1000 ℃ and 1200 ℃, and is a fine granular crystal. Under the same experimental temperature, the mold powder with high crystallization rate, small crystal size and dense structure during the temperature rising process have a good degree of crystal growth and coarse crystals.