Harmless treatment method of drilling mud produced by in-situ leaching uranium exploration

A technology of harmless treatment and mud, applied in sludge treatment, mining wastewater treatment, chemical instruments and methods, etc., can solve the problems of land acquisition and occupation, high climatic conditions, long treatment period, etc., to achieve good economic stability and rationality, the effect of shortening the setting time

Active Publication Date: 2016-08-17
中核通辽铀业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high requirements on climatic conditions, long processing period, and cannot reasonably dispose of radioactive mud. There are great hidden dangers in terms of safety and environmental protection. It also has a greater impact on land acquisition

Method used

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  • Harmless treatment method of drilling mud produced by in-situ leaching uranium exploration

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a method for harmless treatment of in-situ leaching mining uranium drilling mud described in the present invention, the method carries out radioactivity monitoring in the drilling mud process, for non-radioactive mud, i.e. non-ore-bearing layer mud adopts the following method deal with:

[0036] (1) Build a mud pool and a sewage purification pool;

[0037] (2) Pump the non-ore-bearing layer mud into the mud pool with a mud pump, and add flocculant in the mud pool at the same time; the flocculant is ferrous sulfate, and the addition is 20kg / m 3 ;

[0038] (3) In the mud pool, solid-liquid separation is carried out after the mud is stratified into solid and liquid; the supernatant is discharged into the sewage purification tank successively;

[0039] (4) After the solid-liquid separation in step (3), the mud water content in the edge area of ​​the mud pool is directly buried below 5wt%; and the mud water content in the central area of ​​the m...

Embodiment 2

[0043] Such as figure 1 As shown, a method for harmless treatment of in-situ leaching mining uranium drilling mud according to the present invention, the method carries out radioactive monitoring during the drilling mud process, and for radioactive mud, that is, the ore-bearing layer mud is processed by the following method :

[0044] (a) Dividing the ore-bearing layer mud into coarse sand mud and fine sand mud through filtration pretreatment, the particle size of the coarse sand mud is greater than 0.1mm, and the particle size of the fine sand mud is equal to or less than 0.1mm;

[0045] (b) After the coarse sand slurry obtained in step (a) is desandered by a vibration desander, it is divided into solid phase slurry and liquid phase slurry;

[0046] (c) add flocculant to the fine sand mud obtained in step (a) and carry out solid-liquid separation, be divided into solid phase mud and liquid phase mud; Described flocculant is ferrous sulfate, and add-on is 20kg / m 3 ;

[0047...

Embodiment 3

[0050] Such as figure 1 Shown, a method for innocuous treatment of in-situ leaching uranium drilling mud, the method carries out radioactive monitoring in the drilling mud process, for non-radioactive mud, that is, the non-ore-bearing layer mud is processed by the following method:

[0051] (1) Build a mud pool and a sewage purification pool;

[0052] (2) Pump the non-ore-bearing layer mud into the mud pool with a mud pump, and add flocculant in the mud pool at the same time; the flocculant is ferrous sulfate, and the addition is 20kg / m 3 ;

[0053] (3) In the mud pool, solid-liquid separation is carried out after the mud is stratified into solid and liquid; the supernatant is discharged into the sewage purification tank successively;

[0054] (4) After the solid-liquid separation in step (3), the mud water content in the edge area of ​​the mud pool is low and directly buried; while the mud water content in the central area of ​​the mud pool is high, use a curing agent to mi...

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Abstract

The invention relates to a harmless treatment method of drilling mud produced by in-situ leaching uranium exploration. According to the method, radioactivity monitoring is carried out in a mud drilling process. The harmless treatment method comprises the steps of pumping non-ore-bearing strata mud into a mud pit by using a mud pump, and adding a flocculating agent into the mud pit at the same time; carrying out solid-liquid layering on the mud, and then gradually discharging supernatant liquor into a sewage purifying pond; adding a purifying agent into the sewage purifying pond for carrying out purification treatment. The harmless treatment method also can be implemented by the following steps: dividing ore-bearing strata mud into coarse sand mud and fine sand mud by means of filtering pretreatment; removing the sand of the coarse sand mud by a vibration desander, and then dividing the mud without the sand into solid phase mud and liquid phase mud; adding the flocculating agent into the fine sand mud for carrying out solid-liquid separation to separate the find sand mud into solid phase mud and liquid phase mud; carrying out plate-frame pressure filtration on the solid phase mud and then sending the mud into an evaporation pond; adding the purifying agent into the liquid phase mud and then preparing into mud for recycling. The harmless treatment method is used for recycling the mud by means of solid-liquid separation, purification and the like, and is capable of respectively and reasonably treating the radioactive mud and non-radioactive mud at the same time, thus having better economy and rationality.

Description

technical field [0001] The invention relates to the field of uranium mining by in-situ leaching, in particular to a method for harmless treatment of waste drilling mud in an in-situ leaching mining area. Background technique [0002] Drilling in the in-situ leaching uranium mining process is a prerequisite for the effective circulation of the leaching agent. A large number of injection drilling holes are distributed in the well site according to a certain well type and well spacing. A chemical reaction forms a uranium-containing solution. However, a large amount of waste mud will be produced in the process of drilling and well completion, and its main components are drilling fluid sewage, various mechanical flushing sewage and cuttings, etc., and the mud contains radioactive substances. At present, the natural evaporation burial method is widely used at home and abroad to treat waste mud. This method discharges the waste drilling mud into the mud pool for natural evaporatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F103/10
CPCC02F11/00C02F2103/10
Inventor 苏学斌刘乃忠高险峰李喜龙汤庆四董惠琪闫纪帆刘金明夏旭张磊
Owner 中核通辽铀业有限责任公司
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