Abstract:

Natural conditions and formation process for pyrite were simulated. A laboratory vacuum tube furnace heater was used through the thermal curing process between 250℃ and 410℃. Responses were captured from the experimental study at different temperatures under the conditions of pyrite crystallization growth. Using the methods such as scanning electron microscope and X-ray diffraction analysis, the authors analyzed the pyrite in crystal form and structure. The results show that it is formed between 250℃ and 410℃, but it is low in degree of crystallization between 250℃ and 280℃. The partial crystal faces begin to grow between 310℃ and 340℃, and better crystal planes occur at 360℃. It has euhedral crystals that appear as cubes and octahedrons at 380℃. When it is 410℃, the pyrite crystallizes completely with a single composition.

Key words: thermal sulfurization, temperature influence, pyrites, crystallization growth