The underground brine is mined by the brine well to expose the brine layer, and the casing is cemented and then brine is collected. In some brine layers, brine can be sprayed out of the ground. This is self-spraying. Some brines cannot be sprayed out of the ground to maintain an equilibrium liquid level in the well. At this time, brine is extracted from the well by means of a brine extraction machine. Common methods for mining underground brines include: gas lift mining method, pumping unit-deep well pump mining method, electric submerged halogen pump mining method and extraction and brine extraction method. These kinds of halogen extraction methods in Sichuan are used. The adaptability and economic indicators of its mechanical equipment to the conditions of the brine well are shown in the following table. Comparison of technical and economic indicators of various underground halogen extraction methods Turbine High Speed Spiral hard Door
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