Coal underground gasification furnace and preparation method thereof

• Main Authors: SUN YU, HAO LIQIANG, CHEN LONG, LI HUA, BAO JUN, HAN YUAN
• Format: Patent
• Language: Chinese; English
• Published: 11.07.2012
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; LIME, MAGNESIA; METALLURGY; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to a coal underground gasification furnace and a preparation method of the coal underground gasification furnace. The coal underground gasification furnace comprises an air inlet channel, an air outlet channel and a gasification channel, wherein the gasification channel is positioned in a coal layer; the air inlet channel and the air outlet channel are positioned in a ground layer; the air inlet channel, the gasification channel and the air outlet channel are sequentially communicated with each other; the air inlet channel and the air outlet channel respectively comprise sleeves and cement stone rings; and the cement stone rings are covered with sleeves and are formed by curing cement slurries including oil-well cements, heat stabilizers, light-weight additives and water. In the cement slurries, the weight ratio of the oil-well cements, the heat stabilizers, the light-weight additives and the water is 100:10-50:10-30:50-60. Based on the reference of the total weight of the heat stabilize