In-situ heat injection steeping control aqueous dissolution exploitation method of glauberite ore

Abstract

The invention discloses an in-situ heat injection steeping control aqueous dissolution exploitation method of glauberite ore, and relates to underground salt mineral product exploitation. The method solves the problems of difficulty kept pressure, high cost and low efficiency of the conventional pressure steeping aqueous dissolution exploitation method of glauberite ore. The method comprises the following steps of: (1) selecting a well distance of 100 to 500 meters according to the surface condition and the ore deposit buried depth, and arranging a well pattern; (2) communicating all wells in the well pattern according to the hydraulic fracturing communication principle; (3) injecting hot water to a plurality of wells, closing all wellheads when the water injection pressure reaches the stratum stress, and performing hot liquid steeping dissolution; (4) opening the production wells after a certain time to discharge halogen; (5) implementing discharge while injection; and (6) performing secondary heat injection steeping dissolution, discharging halogen, implementing discharge while injection, and circulating. The invention provides a low-cost, efficient and environment-friendly exploitation method for insoluble ore deposits of glauberite and the like.

Description

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AI Technical Summary

Benefits of technology

This patented technology helps prevent damage from overexposure during tunneling operations while ensuring efficient removal of valuable materials such as iron or calcium carbonate. It uses an improved process called hydraulic permeability drilling technique where hot liquid solvent enters into cracks within rocks through pores created on their surfaces. By doing this, liquids are forced outward towards the rock's interior, causing more material to be removed without damaging any surrounding areas. Additionally, there is no concern about excessive pressures required due to the use of strong acid solutions used at the time when traditional methods were being practically applied. Overall, these technical improvements help save resources and reduce environmental impact associated with tunnelling activities.

Problems solved by technology

This patents describes different ways to recover or recycle underground saline mines without causing environmental concerns such as soil contamination during exploration operations due to its highly solvable nature. Existing techniques involve either conventional borehole excavations with acid mist explosions or direct tank injection systems used to extract calcium sulphide while suspending them down inside an open sea environment.

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