NL2034691A

NL2034691A - Recycling method of core drilling waste mud

Info

Publication number: NL2034691A
Application number: NL2034691A
Authority: NL
Inventors: Shi Yan; Hou Xiuhong; Qi Wei; Fan Songhao; Yang Biao; Wang Jiangling; Wang Wenjie; Su Panyun; Liu Zhilong; Lv Hanqin; Li Chengyuan
Original assignee: China Geological Survey Hohhot Natural Resources Comprehensive Survey Center; Univ Chengdu Technology
Priority date: 2022-06-24
Filing date: 2023-04-26
Publication date: 2024-01-08
Also published as: CN115196711B; CN115196711A

Abstract

The disclosure relates to a recycling method of core drilling waste mud. The innovation is that core drilling waste mud is subjected to step-by-step treatment by using a pretreatment agent and a posttreatment agent, wherein nonionic polyacrylamide in the pretreatment agent coordinates with modified activated carbon particles to wrap, adsorb and flocculate oil residues, heavy metal particles and macromolecular chemicals in the waste mud to finally form a “clear liquid” on an upper layer and a “turbid liquid” on a lower layer. The “clear liquid” on the upper layer is extracted back to core drilling construction for recycling; the “turbid liquid” on the lower layer is pumped into a static solidification tank, and solidified through coordination of an amidoamine mud solidifying agent in the posttreatment agent with artemisia plants so that “turbid liquid” forms a solid waste whose volume is 5%-8% of that of the original waste mud.

Description

RECYCLING METHOD OF CORE DRILLING WASTE MUD

TECHNICAL FIELD

[0001] The disclosure belongs to the field of geological drilling, and relates to a drilling waste mud treatment technology, particularly to a recycling method of core drilling waste mud.

BACKGROUD OF THE PRESENT INVENTION

[0002] Core drilling mud plays the roles in cooling a drill, maintaining a hole wall, carrying rock debris and balancing strata pressure and the like. To exert the above functions, it is needed to add chemical products such as bentonite, a fluid loss additive, carboxymethyl cellulose, vegetable gum, potassium humate, sulfonated asphalt, a high-viscosity plugging agent and caustic soda in core drilling mud. In order to maintain the performance of the core drilling mud, the mud needs to be continuously added and replaced. In this process, a large amount of waste mud is generated, which contains fine grain mud and sand, oily residues, heavy metal particles, macromolecular chemicals (such as plant gum molecules and sulfonated asphalt molecules) contained in the original drilling mud, and macromolecular polymers wrapped with colloidal substances such as mud and sand, oils and heavy metal particles. These waste residues are mixed with waste mud so as not to be properly treated and utilized, and improper disposal (such as random discharge) can cause greater pollution to the environment.

[0003] Construction positions for core drilling are generally located in mountainous and hilly areas, and therefore a large amount of waste mud cannot be properly treated. In the existing technology, it usually requires a lot of manpower, material resources and financial resources to transfer and treat the waste mud, which is not economical and environmental-friendly, so that the waste mud cannot be effectively and properly treated for a long time. Therefore, it is particularly important to provide a cheap and simple waste mud treatment method which has huge transformation, promotion and application values in the industry.

SUMMARY OF PRESENT INVENTION

[0004] In order to overcome the inconvenience in the prior art, the disclosure provides a recycling method of core drilling waste mud, which can be efficiently and practically applied to the field of solid mineral exploration. Through the recycling method, oil residues in the waste mud are adsorbed and flocculated, and heavy metal particles and macromolecular chemicals in the waste mud are precipitated and flocculated to finally form a “clear liquid” on an upper layer and a “turbid liquid” on a lower layer. The “clear liquid” on the upper layer is extracted back to recycling of core drilling, and the “turbid liquid” on the lower layer is pumped into a static solidification tank to be treated by a solidifying agent so as to concrete blocky solid wastes which are convenient to treat, and economic and environmental-friendly.

[0005] The technical problems of the disclosure are solved by using the following technical solution:

[0006] Provided is an recycling method of core drilling waste mud, comprising the following steps:

[0007] (1) preparing a precipitation treatment tank and a static solidification tank around a construction field, wherein the bottoms and the peripheries of the precipitation treatment tank and the static solidification tank are both wrapped by using waterproof materials;

[0008] (2) pouring core drilling waste mud into the precipitation treatment tank, testing the A-pH value of waste mud to be treated, adding the pretreatment agent according to the A-pH value range, sufficiently mixing and stirring and then standing for 12-24 h; wherein, at the pH of 8.0-8.5 or less than 8.0, 20-25 L of pretreatment agent aqueous solution needs to be added to treat waste mud per cubic meter; at the pH of 8.5-9.0 or more than 9.0, 15-20 L of pretreatment agent aqueous solution needs to be added to treat waste mud per cubic meter;

[0009] (3) standing and layering the waste mud in the precipitation treatment tank after addition of the pretreatment agent to form a “clear liquid” on an upper layer and a “turbid liquid” on a lower layer, extracting the “clear liquid” on the upper layer back to core drilling construction for recycling, and pumping the “turbid liquid” on the lower layer into the static solidification tank; and

[0010] (4) after pretreatment, when the waste mud enters the static solidification tank, sprinkling 5-10 parts by mass of posttreatment agent based on waste mud per cubic meter for treatment, standing for 3-5 d after fully mixing and stirring to finally form a blocky “solidified layer” whose volume is 5%-8% of the volume of the original waste mud, then recycling the solid waste of the “solidified layer”.

[0011] The pretreatment agent comprises the following components in parts by mass:

[0012] 8-10 parts of nonionic polyacrylamide;

[0013] 2-3 parts of calcium oxide;

[0014] 4-5 parts of modified activated carbon particles,

[0015] a method for preparing the pretreatment agent comprises: various components in the pretreatment agent are ground in a grinding machine and then screened by a 100-mesh sieve to obtain a pretreatment agent solid mixture; when in use, the pretreatment agent aqueous solution is prepared: 10 kg of pretreatment agent solid mixture is added into pure water per cubic meter to be sufficiently stirred to obtain the pretreatment agent aqueous solution.

[0016] A method for preparing the modified activated carbon particles comprises:

[0017] (1) soaking powdered activated carbon particles into a H20: solution for 10-12 h, and then evenly stirring every 2 h followed by extracting and filtering to obtain per-oxidized activated carbon particles after treatment; and

[0018] (2) soaking the per-oxidized activated carbon particles in a 60-80wt%

NaOH strong alkaline solution for 10-12 h, and then evenly stirring every 2 h followed by extracting and filtering to obtain modified activated carbon particles after treatment, wherein the modified activated carbon particle has a specific surface area of 1625.33-1695.16 m?/g and a porosity of 55-57% which are significantly improved compared with those of commercially available common activated carbon (specific area is 1200-1400 m?/g, and a porosity of 45-50%).

[0019] The posttreatment agent comprises an amidoamine mud solidifying agent and an alkalized artemisia grass plant which are mixed in a ratio of 1:0.5,

[0020] The amidoamine mud solidifying agent comprises the following components in parts by mass:

[0021] 20-25 parts of ethylenediamine disuccinate;

[0022] 25-30 parts of polycarboxylic acid water reducer;

[0023] 15-20 parts of liquid epoxy resin.

[0024] Specifically, a method for preparing the above amidoamine mud solidifying agent comprises the following steps:

[0025] (1) weighing ethylenediamine disuccinic acid, a polycarboxylic acid water reducer and a liquid epoxy resin;

[0026] (2) evenly mixing ethylenediamine disuccinic acid with the liquid epoxy resin, heating to 150-170°C, and then stirring to react for 2-4 h;

[0027] (3) adding the polycarboxylic acid water reducer, and heating to 150-170°C, and then stirring to react for 2-4 h; and

[0028] (4) cooling the mixture obtained in step (3) to < 40°C, evenly stirring and then discharging, so as to obtain the amidoamine mud solidifying agent.

[0029] The artemisia plant is preferably artemisia annua. A method for alkalizing the artemisia plant comprises: the artemisia plant is smashed into 1-2 mm straws, the straws are mixed and soaked into a 10-20wt% NaOH solution for 10-12 h, the above mixture is evenly stirred every 2 h, and then the treated artemisia plant is obtained after 8-10 h.

[0030] During the solidification, the artemisia plant plays the roles in “bridging”, accelerating the solidification and enhancing the stability of the block after solidification to a certain extent, meanwhile, combination of the artemisia plant with a solidifying agent can appropriately reduce the use amount of the solidifying agent, makes a chemical reagent and a plant jointly coordinate to take a synergistic effect, which accelerates the solidification and has positive environment-friendly effect while reducing the solidification treatment

[0031] The disclosure has the advantages and beneficial effects:

[0032] 1. The pretreatment agent in the method of the disclosure uses the nonionic polyacrylamide and the modified activated carbon which are cheap to cooperate with the waste mud to flocculate the mud sand, heavy metal particle residues and other wastes in the waste mud, and wrap the flocculates with other 5 macromolecular chemicals. Through the modified activated carbon, the adsorption effect on heavy metal large particle substances and oily residue wastes is increased; meanwhile on the one hand, calcium oxide releases heat when encountering water to accelerate the treatment reaction; on the other hand, calcium hydroxide generated after encountering water can neutralize a small amount of free acids and acid salt substances in the waste mud, and forms a water-insoluble sediment with metal ions in the waste mud, so as to further separate the waste mud and accelerate the separation, adsorption and flocculation of the waste mud.

[0033] 2. The main action mechanism of the posttreatment agent in the method of the disclosure is that an ion exchange adsorption mechanism is established through the amidoamine mud solidifying agent so that the “turbid liquid” can achieve rapid water loss and consolidation. Meanwhile, the alkalized artemisia plants are added, and the artemisia micro-fine stalks play a “bridging” role in the solidification of the residues so as to further accelerate the solidification reaction of “turbid liquid”.

[0034] The design of the disclosure is scientific and reasonable, and the innovation is that core drilling waste mud is subjected to step-by-step treatment by using the pretreatment agent and the posttreatment agent, wherein nonionic polyacrylamide in the pretreatment agent coordinates with modified activated carbon particles to wrap, adsorb and flocculate oil residues, heavy metal particles and macromolecular chemicals in the waste mud to finally form a “clear liquid” on an upper layer and a “turbid liquid” on a lower layer, the “clear liquid” on the upper layer is extracted back to core drilling construction for recycling; the “turbid liquid” on the lower layer is pumped into the static solidification tank, and solidified through coordination of the amidoamine mud solidifying agent in the posttreatment agent with the artemisia plants so that the “turbid liquid” is accelerated to form the solid waste whose volume is 5%-8% of that of the original waste mud. The method of the disclosure is convenient to recycle, improves the recycling rate of the waste mud and greatly reduces the pollution of the waste mud on environments.

DESCRIPTION OF THE DRAWINGS

[0035] FIG.1 is a structural diagram of a precipitation treatment tank and a static solidification tank according to the disclosure;

[0036] FIG.2 1s a diagram showing effects before and after a pretreatment agent and a posttreatment agent are added in a two-stage treatment pool in FIG. 1;

[0037] FIG.3 is a use effect diagram of a treatment method according to the disclosure.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0038] Next, the disclosure will be further described in detail through specific embodiments. The following examples are only descriptive but not limiting, and cannot thereby limit the protective scope of the disclosure.

[0039] By using the method of the disclosure, a test is conducted in the gold resource exploration base in Wulashan area, Baotou, Inner Mongolia. The main working method is geological core drilling, and the drilling mud is an indispensable fluid material in the drilling process. However, in this process, the waste mud that is difficult to treat is formed after the mud is used.

[0040] The disclosure provides a recycling method of core drilling waste mud, comprising the following steps:

[0041] (1) as shown in FIG.1, preparing a precipitation treatment tank and a static solidification tank around a construction field, wherein the bottoms and the peripheries of the precipitation treatment tank and the static solidification tank are both wrapped by using waterproof materials;

[0042] (2) pouring core drilling waste mud into the precipitation treatment tank, testing the A-pH value of waste mud to be treated, adding the pretreatment agent according to the A-pH value range, sufficiently mixing and stirring and then standing for 12-24 h; wherein, at the pH of 8.0-8.5 or less than 8.0, 20-25 L of pretreatment agent aqueous solution needs to be added into waste mud per cubic meter for treatment; at the pH of 8.5-9.0 or more than 9.0, 15-20 L of pretreatment agent aqueous solution needs to be added into the waste mud per cubic meter for treatment

[0043] (3) standing and layering the waste mud in the precipitation treatment tank after addition of the pretreatment agent to form a “clear liquid” on an upper layer and a “turbid liquid” on a lower layer, extracting the “clear liquid” on the upper layer back to recycling of core drilling, and pumping the “turbid liquid” on the lower layer into a static solidification tank; and

[0044] (4) after pretreatment, when the waste mud enters the static solidification tank, sprinkling 5-10 parts by mass of posttreatment agent based on waste mud per cubic meter for treatment, standing for 1-2 d after fully mixing and stirring to finally form a blocky “solidified layer” whose volume is 5%-8% of the volume of the original waste mud, then recycling the solid waste of the “solidified layer”.

The effects of the two-stage treatment pool after the pretreatment agent and the posttreatment agent are added are as shown in FIG.2.

[0045] The innovation of the disclosure is to develop the pretreatment agent and the posttreatment agent to treat the core drilling waste mud. The pretreatment agent comprises the following components in parts by mass: 8-10 parts of nonionic polyacrylamide, 2-3 parts of calcium oxide and 4-5 parts of modified activated carbon particles. A method for preparing the pretreatment agent comprises: various components in the pretreatment agent are ground in a grinding machine and then screened by a 100-mesh sieve to obtain a pretreatment agent solid mixture; when in use, the pretreatment agent aqueous solution is prepared: 10 kg of pretreatment agent solid mixture is added into pure water per cubic meter to be sufficiently stirred to obtain the pretreatment agent aqueous solution.

[0046] In the disclosure, the common activated carbon powders are modified, and a method for preparing the modified activated carbon particles comprises:

[0047] (1) soaking powdered activated carbon particles into a H202 solution for 10-12 h, and then evenly stirring every 2 h followed by extracting and filtering to obtain per-oxidized activated carbon particles after treatment; and

[0048] (2) soaking the per-oxidized activated carbon particles in a 60-80wt%

[0049] The posttreatment agent comprises an amidoamine mud solidifying agent and an alkalized artemisia grass plant which are mixed in a ratio of 1:0.5. The amidoamine mud solidifying agent comprises the following components in parts by mass: 20-25 parts of ethylenediamine disuccinate, 25-30 parts of polycarboxylic acid water reducer and 15-20 parts of liquid epoxy resin.

Specifically, a method for preparing the above amidoamine mud solidifying agent comprises the following steps:

[0050] (1) weighing ethylenediamine disuccinic acid, a polycarboxylic acid water reducer and a liquid epoxy resin;

[0051] (2) evenly mixing ethylenediamine disuccinic acid with the liquid epoxy resin, heating to 150-170°C, and then stirring to react for 2-4 h;

[0052] (3) adding the polycarboxylic acid water reducer, and heating to 150-170°C, and then stirring to react for 2-4 h; and

[0053] (4) cooling the mixture obtained in step (3) to < 40°C, evenly stirring and then discharging, so as to obtain the amidoamine mud solidifying agent.

[0054] The artemisia plant is preferably artemisia annua. A method for alkalizing the artemisia plant comprises: the artemisia plant is smashed into 1-2 mm straws, the straws are mixed and soaked into a 10-20wt% NaOH solution for 10-12 h, the above mixture is evenly stirred every 2 h, and then the treated artemisia plant is obtained after 8-10 h.

[0055] During the solidification, the artemisia plant plays the roles in “bridging”, accelerating the solidification and enhancing the stability of the block after solidification to a certain extent; moreover, the artemisia plant is widely developed in Inner Mongolia, its pollens cause people in most regions to have allergic reaction, and the artemisia plant is alkalized and then can serve as a utilization object to be applied in the field of solidifying agents and has an important practical values.

[0056] In the disclosure, an untreated waste mud is compared with a treated waste mud, and the comparison results are seen in FIG.3. Meanwhile, specified determination is conducted, and specific determination results as shown in table below: “Turbid liquid on the lower

Determination Untreated liquid” on Add a index waste solution | the upper | Stand for 10 | solidifying layer h agent and stand for 1 d

Amount % of mud separated by 35 9 45 centrifuge transmittance%o

Volatile phenol

Suspended solids Consolidated

Chemical oxygen

[0057] In summary, after treatment with the method disclosed by this parent application, the amounts of mud, suspended solids and oils in the “clear liquid” are greatly reduced, and the light transmittance 1s increased, which is consistent with the recycling of drilling mud; after treatment, the amounts of sludge, suspended solids, oils, metal ions, chemical oxygen demand and the like in the “turbid liquid” are increased to varying degrees, and the light transmittance is decreased.

[0058] It can also be observed intuitively from FIG.3 that in the method disclosed by this patent application, the untreated waste mud in the process of core drilling has achieved obvious separation effect of “clear liquid” and “turbid liquid” after the treatment of the above steps in this application, wherein the “clear liquid” can be recycled, and the “turbid liquid” can form a solid waste after standing and solidification treatment, the volume of the solid waste is 5%-8% of the volume of the original waste mud, then, the solid waste of the “solidified layer” can be recycled, and therefore recycling is convenient, and the pollution of the waste mud to the environment is greatly reduced.

[0059] Although the embodiments of the disclosure are disclosed for the purpose of illustration, those skilled in the art should be understood that various replacements, changes and modifications are all made without departing from the spirit and scope of the disclosure and appended claims. Therefore, the scope of the disclosure is not limited to the contents disclosed by the embodiments.

[0060] PREFERRED EMBODIMENTS

[0061] An recycling method of core drilling waste mud, comprising the following steps:

[0062] (1) preparing a precipitation treatment tank and a static solidification tank around a construction field, wherein the bottoms and the peripheries of the precipitation treatment tank and the static solidification tank are both wrapped with waterproof materials;

[0063] (2) pouring core drilling waste mud into the precipitation treatment tank, testing the A-pH value of waste mud to be treated, adding the pretreatment agent according to the A-pH value range, sufficiently mixing and stirring and then standing for 12-24 h;

[0064] (3) standing and layering the waste mud in the precipitation treatment tank after addition of the pretreatment agent to form a “clear liquid” on an upper layer and a “turbid liquid” on a lower layer, extracting the “clear liquid” on the upper layer back to core drilling construction for recycling, and pumping the “turbid liquid” on the lower layer into the static solidification tank; and

[0065] (4) after completion of pretreatment, when the waste mud enters the static solidification tank, sprinkling 5-10 parts by mass of posttreatment agent based on waste mud per cubic meter for treatment, standing for 3-5 d after fully mixing and stirring to finally form a blocky “solidified layer” whose volume is 5%-8% of the volume of the original waste mud, and then recycling solid wastes in the “solidified layer”,

[0066] the pretreatment agent comprises the following components in parts by mass:

[0067] 8-10 parts of nonionic polyacrylamide;

[0068] 2-3 parts of calcium oxide;

[0069] 4-5 parts of modified activated carbon particles,

[0070] the posttreatment agent comprises an amidoamine mud solidifying agent and an alkalized artemisia grass plant which are mixed in a ratio of 1:0.5,

[0071] the amidoamine mud solidifying agent comprises the following components in parts by mass:

[0072] 20-25 parts of ethylenediamine disuccinate;

[0073] 25-30 parts of polycarboxylic acid water reducer;

[0074] 15-20 parts of liquid epoxy resin.

[0075]

[0076] 2. The recycling method of core drilling waste mud according to embodiment 1, wherein at the pH of 8.0-8.5 or less than 8.0, 20-25 L of pretreatment agent aqueous solution needs to be added into waste mud per cubic meter for treatment; at the pH of 8.5-9.0 or more than 9.0, 15-20 L of pretreatment agent aqueous solution needs to be added into the waste mud per cubic meter for treatment.

[0077] 3. The recycling method of core drilling waste mud according to embodiment 1, wherein a method for preparing the pretreatment agent comprises: various components in the pretreatment agent are ground in a grinding machine and then screened by a 100-mesh sieve to obtain a pretreatment agent solid mixture; when in use, the pretreatment agent aqueous solution is prepared: 10 kg of pretreatment agent solid mixture is added into pure water per cubic meter to be sufficiently stirred to obtain the pretreatment agent aqueous solution.

[0078] 4. The recycling method of core drilling waste mud according to embodiment 1, wherein a method for preparing the modified activated carbon particles comprises:

[0079] (1) soaking powdered activated carbon particles in a H202 solution for 10-12 h, evenly stirring every 2 h, followed by extracting and filtering to obtain per-oxidized activated carbon particles; and

[0080] (2) soaking the per-oxidized activated carbon particles in a 60-80wt%

NaOH strong alkaline solution for 10-12 h, and then evenly stirring every 2 h followed by extracting and filtering to obtain modified activated carbon particles after treatment, wherein the modified activated carbon particle has a specific surface area of 1625.33-1695.16 m2/g and a porosity of 55-57%.

[0081] 5. The recycling method of core drilling waste mud according to embodiment 1, wherein a method for preparing the amidoamine mud solidifying agent comprises the following steps:

[0082] (1) weighing ethylenediamine disuccinic acid, a polycarboxylic acid water reducer and a liquid epoxy resin;

[0083] (2) evenly mixing ethylenediamine disuccinic acid with the liquid epoxy resin, heating to 150-170°C, and then stirring to react for 2-4 h;

[0084] (3) adding the polycarboxylic acid water reducer and heating to 150-170°C, and then stirring to react for 2-4 h; and

[0085] (4) cooling the mixture obtained in step (3) to < 40°C, evenly stirring and then discharging, so as to obtain the amidoamine mud solidifying agent.

[0086] 6. The recycling method of core drilling waste mud according to embodiment 1, wherein a method for alkalizing the artemisia plant comprises: the artemisia plant is smashed into 1-2 mm straws, the straws are mixed and soaked into a 10-20wt% NaOH solution for 10-12 h, the above mixture is evenly stirred every 2 h, and then the treated artemisia plant is obtained after 8-10 h.

[0087] 7. The recycling method of core drilling waste mud according to embodiment 1 or 6, wherein the artemisia plant is preferably artemisia annua.

Claims

CONCLUSIONS

1. A recycling method for core drill waste mud consists of the following steps: (1) preparing a tank where the precipitate is treated and a tank where the waste mud is solidified around a construction site, with the bottoms and perimeters of the tank where the precipitate is treated and a tank where the waste mud is solidified are both wrapped with waterproof materials; (2) pouring waste core drill mud into the tank where the precipitate is treated, testing the A-pH value of the waste core drill mud to be treated, adding the pretreatment agent according to the A pH value, sufficient mix, stir and then let stand for 12 to 24 hours; (3) forming layers of the waste mud in the tank where the precipitate is treated, after adding the pretreatment agent to form a “clear liquid” on an upper layer and a “cloudy liquid” on a lower layer, extracting the "clear liquid" on the top layer back to the core drilling structure for recycling, and pumping the "cloudy liquid" on the bottom layer into a tank where the waste mud is solidified, and (4) after completing the pre-treatment and when the waste mud into a tank where the waste mud is solidified, sprinkling 5-10 parts by mass of post-treatment agent based on the waste mud per cubic meter for treatment, allowing it to stand for 3-5 days after sufficient mixing and stirring to finally form a block-shaped “ solidified layer” whose volume is 5%-8% of the volume of the original waste mud, and then recycling solid waste into the “solidified layer”, the pretreatment agent consists of the following components in parts by mass: 8-10 parts non-ionic polyacrylamide;

2-3 parts calcium oxide; 4-5 parts of modified activated carbon particles, the post-treatment agent consists of an amidoamine mud coagulant and an alkalized artemisia grass plant mixed in a ratio of 1:0.5, the amidoamine mud coagulant consists of the following components in parts by mass: 20-25 parts ethylenediamine disuccinate; 25-30 parts polycarboxylic acid water reducing agent; 15-20 parts liquid epoxy resin.

2. The core drilling mud waste recycling method according to claim 1, wherein at a pH value of 8.0-8.5 or less than 8.0, 20-25 L of aqueous solution of pre-treatment agent per cubic meter should be added to the drill cuttings for treating; at an A-pH value of 8.5-9.0 or more than 9.0, 15-20 L of aqueous solution of pretreatment agent per cubic meter should be added to the waste mud for treatment.

The core drilling mud waste recycling method according to claim 1, wherein a method for preparing the pretreatment agent consists of the following steps: firstly, various components of the pretreatment agent are finely ground in a grinding machine and then passed through a 100-mesh sieve to to obtain a solid mixture of pretreatment agents; when using, the aqueous solution of the pretreatment agent is prepared: 10 kg of the solid mixture of pretreatment agents is added to pure water per cubic meter which is sufficiently stirred to obtain the aqueous solution of the pretreatment agents.

4. The core drill waste mud recycling method according to claim 1, wherein a method for preparing the modified activated carbon particles consists of: (1) soaking powdered activated carbon particles in H 2 O 2 solution for 10-12 hours and stirring uniformly every 2 hours, then extracting and filtering to obtain peroxidized activated carbon particles; and (2) soaking the peroxidized activated carbon particles in a strongly alkaline solution of 60-80wt% NaOH for 10-12 hours, and stirring evenly every 2 hours, then extracting and filtering to obtain modified activated carbon particles after treating. where the modified activated carbon particle has a specific surface area of 1625.33-1695.16 m2/g and a porosity of 55-57%.

The core drill waste mud recycling method according to claim 1, wherein a method for preparing the amidoamine mud coagulant consists of the following steps: (1) weighing ethylenediamine disuccinic acid, a polycarboxylic acid water reducing agent and a liquid epoxy resin; (2) uniformly mixing ethylenediamine-succinic acid with the liquid epoxy resin, heating to 150-170°C and then stirring to react for 2-4 hours; (3) adding the polycarboxylic acid water reducing agent, heating to 150-170°C and then stirring to react for 2-4 hours; and (4) cooling the mixture obtained in step (3) to < 40°C, stirring uniformly and then dissolving to obtain the amidoamine mud solidifying agent.

6. The recycling method for the waste mud of core drill according to claim 1, wherein a method for alkalizing the artemisia plant consists of the following steps: firstly, the artemisia plant is ground into straws of 1-2 mm, then the straws are mixed and soaked for 10-12 hours in a 10-20wt% NaOH solution, and the above mixture is stirred evenly every 2 hours, and finally the treated artemisia plant is obtained after 8-10 hours.

The recycling method for core drill waste mud according to claims 1 or 6, wherein the artemisia plant is preferably artemisia annua.