Technical Overview
To overcome the limitations of current fire prevention and control technologies such as slurry injection, inert gas injection, inhibitor application, and two-phase or three-phase foam, Purite Special Fluid for Mine Fire Prevention and Extinguishing (JTF-Ⅰ) (hereinafter referred to as Purite Ⅰ) adopts microcapsule technology. Firstly, the gelling material is surface-treated using microcapsule technology; after water generates foam, the gelling material is then released, thereby achieving the ideal state of first foaming and then gelling. This technology well integrates the characteristics of various fire prevention and control technologies including yellow clay grouting, inert gas, gel, inhibitor, and two-phase or three-phase foam, while avoiding the shortcomings of the aforementioned technologies.

Technical Characteristics
(1) Good diffusivity and accumulation: The generated gel, with foam as the carrier, can achieve large-scale diffusion, three-dimensional accumulation and all-round coverage of high, medium and low-position fire sources in the fire zone.
(2) Excellent water retention and cooling performance: The generated gel contains more than 90% water, which has superior functions of heat absorption and cooling, as well as moistening and cooling for the oxidation and heat storage area.
(3) Excellent adhesion and sealing performance: The gel can effectively cover and adhere to the cracks in floating coal wherever it reaches, and has good sealing performance for tiny air leakage channels.
(4) Excellent thermal stability: The gel has good high-temperature resistance. When exposed to high temperatures, it can absorb heat slowly, efficiently displace the heat generated by coal oxidation, and significantly improve the cooling utilization efficiency of water.
(5) Good inhibition and inerting properties: The inhibitor contained in the additive can efficiently inhibit the coal body and prevent coal spontaneous combustion. Meanwhile, the nitrogen in the foam is released slowly, which avoids the disadvantage that nitrogen is easy to lose when nitrogen is injected alone, and maintains the inerting of the fire zone for a long time.

Fire Prevention and Extinguishing Performance
(1) Goaf diffusion performance
Compared with conventional gel, it boasts superior diffusion performance. The gel generated by Prate Type Ⅰ, with foam as the carrier, can diffuse through the cracks in the floating coal to the higher and more distant parts of the goaf. In all areas accessible to the foam, the gel layer is able to cover the floating coal.
(2) Comparison of accumulation performance between Purite Ⅰ and conventional foam
Compared with yellow mud slurry and conventional foam, Purite Ⅰ has better accumulation performance and can pile up to higher positions in a roughly open space.
(3) Comparison of anti-reignition performance between Purite Ⅰ and conventional foam
Prate gel contains more than 90% water and boasts superior functions of heat absorption, temperature reduction and cooling. Compared with yellow mud slurry and conventional foam, it has better anti-reignition performance.
(4) Comparison of thermal stability between Purite Ⅰ and conventional foam
The gel has good high-temperature resistance. When exposed to high temperatures, it can absorb heat slowly, efficiently displace the heat generated by coal oxidation, and significantly improve the cooling efficiency of water.
(5) The air leakage blocking performance of Purite (JTF-Ⅰ)
Wherever the gel goes, it can effectively cover and adhere to the cracks in the floating coal. Compared with yellow mud slurry and ordinary foam, it has excellent sealing performance for fine channels.

Application Location
(1) Prevention and control of large-area concealed fire sources or high-level fire sources in the goaf;
(2) Prevention and control of coal spontaneous combustion in local areas such as roadways and roofs of supports;
(3) Prevention and control of spontaneous combustion fires in goafs and local areas behind supports;
(4) Prevention and control of large-area fires in coalfields;
(5) Prevention and control of coal pile fires and gangue hill fires.

Application Process
Component A and Component B are respectively added into the Purite preparation system through special equipment at a ratio of 2~6% and 1~3% (2:1) to produce Purite Ⅰ.