The pyrolysis characteristic experi

The pyrolysis characteristic experiment of coal gangue was carried out in the Pyris1TGA thermogravimetric analysis of PerkinElmer Company of USA, and the experiment temperature range was from room temperature to 1000 ° C. The atmosphere is air, the flow rate is 60mlmin-1, and the heating rate is 10 ° Cmin-1. All experiments are repeated at least twice to ensure the repeatability of the experimental results. (1) Determination of coal gangue combustion characteristic parameters Coal gangue combustion characteristic parameters: ignition temperature (T), burnout temperature (Tf), peak temperature (Tp), ignition index (Di), burnout index (Df) and comprehensive index (S and Hf) are determined as follows; T is the temperature at which the sample begins to burn, and is determined by the TG-DTG tangent method (see Figure 2.2). The specific method is: passing the vertex A of the DTG curve as the vertical line of the abscissa, and TG The curve intersects at point B, and the tangent to the TG curve through point B intersects its extension at point C, and point C is Ti