Method and device for drilling four tube liquid pad selective thermal melting producing potassium salt mine

A selective, potassium salt ore technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problem of low KCl recovery rate, achieve faster dissolution rate, reduce brine consumption, and improve leaching Effects on recovery rate and production efficiency

Inactive Publication Date: 2007-06-27
云南地矿集团有限公司
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Problems solved by technology

However, it cannot be completed using the existing solution mining, and the recovery rate of KCl is not high

Method used

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  • Method and device for drilling four tube liquid pad selective thermal melting producing potassium salt mine

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Experimental program
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Effect test

Embodiment 1

[0027] As shown in Figure 1, the outer layer of the underground drilling well wall 8 is equipped with a surface casing 1, and a cementing pipe 3 is installed in the surface casing 1, and a water ring 2 is set between the surface casing 1 and the cementing pipe 3, and the cement The lower end of the ring 2 and the cementing pipe 3 is provided with a safety roof pillar 6, which is used for cementing to prevent the overburden from collapsing and preventing water leakage in the well. At the same time, the liquid anti-emulsifier pad is sent into or out of the well through the cementing pipe 3 layer, a liftable leaching solution pipe 4 is installed in the cementing pipe 3, the lower end of which extends to the top of the salt tank 10, and the upper port is connected with the leaching solution delivery pipeline, one can transport the leaching solution into the well, and the other One is that when the central brine pipe 7 is blocked, potassium-rich brine can be transported to the groun...

Embodiment 2

[0029] A. With 5m 3 The flow rate per hour and the injection pressure of 2MPa send the paraffin liquid as an anti-emulsifier into the salt tank at the bottom of the underground ore layer through the cementing pipe, and form a liquid cushion in the salt tank;

[0030] B. As the immersion liquid, the aqueous solution saturated with NaCl at normal temperature and with a MgCl content of 10 mg / liter was dissolved in 5 m 3 The flow rate per hour and the pressure of 2MPa are sent to the lower part of the liquid cushion in the downhole salt tank through the immersion liquid pipe, and at the same time, the 3 The flow rate per hour and the pressure of 3MPa send steam to the lower part of the liquid cushion in the underground salt tank through the steam pipe to dissolve the bottom ore;

[0031] C. The dissolved ore liquid is less than 5m 3 The flow rate per hour and the pressure less than 1MPa are mined to the ground through the central brine extraction pipe, and the undissolved halite...

Embodiment 3

[0035] A. With 15m 3 / h flow rate, 5MPa injection pressure, the diesel oil used as an anti-emulsifier is sent into the salt tank at the bottom of the underground ore layer through the cementing pipe, and a liquid cushion is formed in the salt tank;

[0036] B. Saturating NaCl at room temperature as the immersion solution, and using an aqueous solution with a MgCl content of 20 mg / liter at 50 m 3 The flow rate per hour and the pressure of 4MPa are sent to the lower part of the liquid cushion in the downhole salt tank through the immersion liquid pipe, and at the same time 3The flow rate per hour and the pressure of 10MPa send steam to the lower part of the liquid cushion in the downhole salt tank through the steam pipe to dissolve the bottom ore;

[0037] C. The dissolved ore liquid is less than 50m 3 The flow rate per hour and the pressure less than 1MPa are mined to the ground through the central brine extraction pipe, and the undissolved halite minerals are filled at the b...

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Abstract

A thermally dissolving method for selectively mining useful potassium chloride and part of magnesium chloride from potassium salt mine by use of shaft, 4 pipes and liquid bed layer includes such steps as arranging the halogen mining pipe, dissolving liquid pipe and heating pipe in shaft, filling anti-emulsifying agent to form a liquid bed layer in salt stratum, and filling the dissolving liquid while filling steam to dissolve the useful ore. Its apparatus is also disclosed.

Description

technical field [0001] The invention relates to a mining method and device of potash ore, in particular to a method and device for selective hot solution mining of potash ore. Background technique [0002] Water drilling is an advanced method for mining soluble salt deposits today. It is divided into single-well convection, single-well oil cushion or air cushion, multi-well docking or interconnection and other mining techniques. It has the advantages of less investment, short well construction period and high production efficiency. , low production cost, high recovery rate of useful minerals, less waste rock output, high mining safety, less environmental pollution, small footprint, and less damage to the surface and vegetation. However, since most of the existing leaching mining uses fresh water as a solvent, a large amount of magnesium chloride and sodium chloride must be extracted while extracting potassium chloride. Mining is difficult, the economic benefit is low, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00C22B3/04
CPCY02P10/20
Inventor 徐世光赵劲张翔杰李晓明郭远生张鸿德彭红英
Owner 云南地矿集团有限公司
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