1136 results about "Clay soil" patented technology

The invention relates to the technical field of drilling fluids, and discloses a lignite-based modified filtrate reducer for a drilling fluid and a preparation method of the lignite-based modified filtrate reducer. The lignite-based modified filtrate reducer for the drilling fluid is obtained by stirring and mixing the lignite grafted copolymer, the hydroxy propyl cellulose and the graphene oxide, drying and crushing. The steric effect generated by an oxazine ring, a pyridine ring, a triazine ring, a benzene ring and a pyrrole ring grafted into the lignite improves the temperature resistance and salt resistance of the filtrate reducer; the dispersing capacity of clay particles in a drilling fluid system is improved through sulfonic acid hydrated groups, and high-temperature coalescence of drilling fluid clay due to the high-temperature effect is avoided; a sulfonic acid anion group and a quaternary ammonium salt cation group are introduced into the filtrate reducer at the same time, so that the filtrate reducer can form a salt internal bond under the action of electrostatic force, and the salt resistance of the filtrate reducer is improved; the nano silicon dioxide increases the rigidity of the filtrate reducer, so that the filtrate reducer is not easy to curl under the conditions of high temperature and high salt.

The invention relates to a lacustrine facies shale conductive model considering organic matter influence and a saturability evaluation method, and belongs to the technical field of unconventional oil and gas reservoir oiliness evaluation, and the method comprises the following steps: 1) representing fluid information in a shale sample based on a pressure-maintaining closed sample and a two-dimensional nuclear magnetic resonance technology; 2) according to the organic carbon content and the clay content of the shale, dividing the lithology type of the lacustrine facies shale, and analyzing the relation between different lithology resistivity values and the porosity of free water and bound water; 3) selecting a siltstone interlayer sample, and inversely calculating a cementation index and a saturation index of the inorganic pore conductive network; 4) establishing a lacustrine facies shale parallel conductive model, and calibrating rock-electricity parameters according to lithology; 5, a lithology discrimination chart, a TOC prediction model, a bound water content prediction model and an effective porosity calculation model are established, and the oil saturation is explained according to different lithologies in combination with the lacustrine facies shale parallel conduction model.According to the method, accurate shale reservoir fluid information is provided, and a brand new thought is provided for rock electrical parameter calibration.

The invention belongs to the technical field of roadbed engineering, and particularly relates to a construction uniformity evaluation method for a clay improved copper tailing roadbed. The method comprises the following specific steps: S1, determining the proportion of the clay improved copper tailing roadbed filler; s2, applying the blended clay improved copper tailings to roadbed construction; and S3, carrying out construction detection on the clay-improved copper tailing roadbed, calculating a mixing uniformity coefficient, and comparing the mixing uniformity coefficient with a uniformity coefficient in a laboratory to evaluate the construction uniformity of the clay-improved copper tailing roadbed. According to the method, after roadbed construction is completed, a working project of measuring the compactness through a field sand filling method is combined, the mixing uniformity coefficient is calculated with the deviation between the composition proportion of roadbed filler sampled through the sand filling method and a proportion design result as a parameter, and the construction quality can be effectively evaluated conveniently.

A method for separating liquid-like (T2e) from solid-like (T2G) 1H NMR transverse relaxation times in porous media uses novel pulse sequences together with a 1H NMR spectrometer optimized for geological core samples. The method is applied to obtain 1D T2 distributions and 2D T1-T2 maps in organic-rich chalks for quantification of liquid-like signal (micropore fluids, meso-macropore fluids, fluids dissolved in organic matter, and clay-bound water) and solid-like signal (kerogen, bitumen, and clay hydroxyls). The novel pulse sequences comprise a solid-echo, which detects more solid-like signal than an FID. The method is used for fluid typing in micro / meso-macro pores, clay mineral identification, determination of kerogen content, and quantification of solvent-extracted bitumen versus bitumen expelled from kerogen due to swelling from dissolved hydrocarbons. The method is used to quantify the asphaltene, resin, aromatic, and / or saturate content of bitumen in the rock.

The invention relates to an intelligent stratum lithology identification method based on logging data. The method comprises the following steps: collecting the logging data; preprocessing the data; extracting features; an LSTM-CRF model is adopted, training set data serve as input of the LSTM model, the CRF model is applied to output of the LSTM model, and stratum lithology is output; and evaluating the model. The method combines the long-term dependence of the recurrent neural network and a deep learning model of the sequence labeling capability of the CRF, and deduces the formation lithology of clay, sandstone, glutenite, limestone, mudstone and dolomite through logging data of natural gamma, sound wave, resistivity and the like. According to the method, the features are automatically extracted from the logging data through a machine learning algorithm, and the lithology identification is carried out by using the features, so that the identification accuracy can be effectively improved; the method does not depend on geological conditions of a specific region, is suitable for logging data of different regions, and has wide applicability.

The invention relates to the technical field of petrochemical engineering, and discloses a temperature-resistant anti-swelling agent for fracturing and a preparation process thereof.The preparation method comprises the steps that glycerol triglycidyl ether and diethanol amine are subjected to a ring-opening reaction, a polyhydroxy tertiary amine monomer is obtained, then the polyhydroxy tertiary amine monomer and chloromethylated polystyrene are subjected to a quaternization reaction, and the temperature-resistant anti-swelling agent for fracturing is obtained. Quaternary ammonium salt groups of the anti-swelling agent and negative charges on the surface of clay form electrostatic interaction, and hydroxyl groups and the surface of the clay form hydrogen-bond interaction, so that the anti-swelling agent can be firmly adsorbed on the surface of the clay to form a layer of polymer film, the clay is prevented from being in contact with water, the phenomenon that the clay swells when encountering water is effectively inhibited, and the anti-swelling rate is very high. And the anti-swelling agent contains a heat-resistant polystyrene molecular chain, has excellent high temperature resistance, can maintain good structural stability at high temperature, still maintains high anti-swelling rate, and is suitable for a fracturing fluid system for high-temperature oil reservoir exploitation.

The invention discloses a nuclear magnetic T2 spectrum correction method for a shale reservoir, and relates to the field of object detection, and the nuclear magnetic T2 spectrum correction method for the shale reservoir comprises the following steps: 1, determining the gas logging porosity, saturated water porosity and main mineral components of the shale reservoir; compared with the prior art, the method disclosed by the invention has the beneficial effects that a drying-saturated water-centrifugal two-dimensional nuclear magnetic resonance experiment is carried out, and signals of crystal water, clay bound water and hydroxyl in a sample are preliminarily identified; through inversion of organic matter signals in the dry sample, signals of movable water are further determined; the relation between the difference value among the gas logging porosity, the saturated water porosity and the nuclear magnetic porosity and different mineral contents is discussed, and particularly the remarkable influence of iron-containing minerals on the porosity difference value is discussed; by eliminating the influence of diffusion relaxation caused by the magnetic susceptibility difference, the T2 spectrum correction method based on the mineral magnetic susceptibility is established, and the T2 spectrum accuracy obtained through nuclear magnetic resonance measurement is improved.

The invention relates to the field of underground environmental pollution prevention and control of refuse landfills, in particular to a comprehensive evaluation method for long-term antifouling performance of a clay separating wall of a refuse landfill, which comprises the following steps: S1, preparing clay separating wall materials with multiple proportions; s2, designing a test according to the long-term anti-fouling performance of the clay separation wall, and obtaining physical and chemical parameters of a clay separation wall material through the test; and S3, setting screening conditions according to the physicochemical parameters, and evaluating and screening the clay separation wall materials with multiple proportions by utilizing the screening conditions to obtain the clay separation wall material with long-term effective antifouling performance. According to the comprehensive evaluation method provided by the invention, the permeability of the clay separating wall, the chemical compatibility with the pollutants and the blocking time of the separating wall to the pollutants are comprehensively considered, so that the long-term antifouling property of the clay separating wall of the refuse landfill is more comprehensively judged, and the screened material can meet the long-term antifouling requirement; and the evaluation accuracy and reliability are greatly improved.

The invention discloses a method for improving an acidic clayey soil plough layer, which comprises the following steps of: 1, after autumn rice is harvested, draining water in a rice field, and carrying out conventional tillage, soil turning and leveling on the rice field for later use; 2, green manure planting is conducted in the suitable green manure sowing period from October to November; 3, in the full-bloom stage, green manure is smashed, turned, pressed and returned to the field, lime and organic fertilizer are spread, the rice field is deeply ploughed at a time, and the green manure, the lime and the organic fertilizer are deeply buried in soil of the rice field; 4, the rice field is irrigated and soaked in water for a period of time, and then rice is planted. The method can inhibit and stabilize acid, improve the buffer performance of the soil, effectively expand a deep ploughing layer, improve the physical structure of the soil and improve the utilization rate of rainfall resources by the soil, so that the purposes of minimal ploughing, high yield and farmland protection are achieved.

The present invention relates to the selection of the size of a mill for the economically viable mechano-chemical activation, in particular of clays, for example in the cement industry.

The clay grain seeding machine comprises a rotary tillage system and a seeding and pressing system which are arranged front and back; a plurality of convex rings coaxial with the central axis of the soil pressing roller are transversely arranged on the outer wall of the soil pressing roller at intervals; a soil covering device is arranged between the seeding system and the pressing system; a feather-shaped protective cover is arranged on the outer side of the soil covering device, and a plurality of soft skins are overlapped end to end to form a protective cover which is provided with a downward opening, surrounds the periphery of the soil covering cutter head and has a semicircular longitudinal section; the pressing roller is adjusted through the pressing pressure adjusting system; the pressing pressure adjusting system comprises two hydraulic adjusting units; the hydraulic adjusting unit comprises a hydraulic cylinder with a longitudinal central axis, and the hydraulic cylinder stretches out and draws back through a piston rod and can drive the pressing roller to rotate around the center where the front end of the pressing roller connecting side plate is hinged to the middle lower portion of the rear portion of the seeding pressing system side plate; a piston rod of the hydraulic cylinder is provided with two springs. The ditching quality is remarkably improved, the seeding quality is remarkably improved through soil covering of the spiral blades and floating pressing, and the device is particularly suitable for clay soil operation.

The invention relates to the technical field of cast-in-place pile construction, in particular to a cast-in-place pile drilling device for a pump station and a construction technology, and the cast-in-place pile drilling device comprises a drilling mechanism, a slurry recycling mechanism, a supporting mechanism and a tamping mechanism. According to the device, when the sliding plate descends, the first one-way rotating plate is driven to descend together, clay between the sliding plate and the soil discharging shell can be scraped and pushed to the position below the drilling barrel through the first one-way rotating plate, when the clay is discharged into the bottom of a hole, external air can be discharged into the space between a drill bit and the bottom of the hole together, and therefore the negative pressure strength can be reduced; a sliding plate continues to press downwards, clay can be compacted layer by layer through a compacting plate, when the sliding plate ascends, blocking is conducted through a second one-way rotating plate, and therefore the situation that the soil is backfilled into a soil discharging shell can be prevented, clay backfilling and tamping can be conducted on the collapsed hole wall at the first time, the collapse area is prevented from being increased, and the construction efficiency is improved. Emergency treatment can be carried out when hole wall collapse and hole wall hole shrinkage occur through the tamping mechanism, and it is guaranteed that follow-up drilling construction is recovered as soon as possible.

To provide a deep well filtering structure that effectively prevents the subsidence and collapse of the well wall. [Solution] The deep well filtration structure of this invention includes a surface loess layer 1 and a well channel 7, with a concrete well side 8 poured onto the surface of the surface loess layer, a reinforced concrete permeable pipe and a reinforced concrete solid pipe 10 installed in sequence inside the well channel, a well pipe pallet 6 placed at the bottom end of the well channel, and below the surface loess layer, in sequence, a gravel-mixed loess layer 2, a gravel layer 3, a crushed stone-mixed loess layer 4 and an underground loess layer 5, and a clay ball-filled sealing layer 9 filled between the surface loess layer, the gravel-mixed loess layer and the reinforced concrete solid pipe.

The present invention relates to the extraction of lithium from liquid resources such as natural and synthetic brines, leachate solutions from clays and minerals, and recycled products.

The present invention discloses a GNSS-R soil moisture inversion method for mountainous areas that integrates a terrain moisture index. The method comprises the following steps: obtaining remote sensing data from target mountainous areas other than water bodies and soil moisture data from each observation station; selecting altitude, slope, aspect, longitude and latitude, vegetation index, clay content, and signal-to-noise ratio as influencing factors for soil moisture inversion in mountainous areas; calculating the corrected signal-to-noise ratio and terrain moisture index; constructing a mountainous area soil moisture inversion model, training it, and validating it; inputting a test set into the trained model to obtain daily soil moisture prediction data with a 1km resolution, taking the monthly average, and obtaining monthly soil moisture prediction data. The present invention's integration of the terrain moisture index with CYGNSS data can fully leverage the advantages of terrain factors and remote sensing technology, further improving the accuracy of soil moisture distribution and the ability to predict spatiotemporal changes, and better revealing the dynamic changes in soil moisture in complex terrain areas such as mountainous areas.

The invention discloses a drilling parameter optimization method for an oil and gas well, and relates to the technical field of oil and gas well drilling, and the method specifically comprises the following steps: identifying whether an expansive clay layer exists in a current drilling area, and determining the position, thickness and activity characteristics of the expansive clay layer under the condition that the expansive clay layer exists in the current drilling area; dynamic change information caused by expansion of the clay layer in the drilling process is collected in real time, and the initial time period from the time when the clay layer meets water to the time when the clay layer starts to rapidly expand is determined; the collected dynamic change information is analyzed, and the influence level on drilling operation in the initial period of clay layer expansion is evaluated; and according to the evaluation result, analyzing the instant influence of the clay layer expansion on the shaft pressure, the drill bit operation load and the slurry flowing condition, and taking corresponding solutions according to the analysis result. The problem of drilling instability caused by clay layer expansion is solved, and drilling parameters are optimized in real time.

The invention relates to the field of hydrogeology, and discloses a mine pit water inflow prediction method suitable for cohesive soil coverage, which comprises the following steps: special drilling: performing monitoring drilling on a mine, and simultaneously respectively adopting cohesive soil undisturbed samples at different positions to obtain cohesive soil data; monitoring data: respectively observing corresponding data of the drill holes by using a monitoring device; a group hole water pumping test is carried out on the mine to obtain a mine underground water flow field form, observation data are collected in real time in the water pumping process, and water pumping test data are obtained; and water release test: carrying out cohesive soil compaction water release test on the cohesive soil undisturbed sample in a high-pressure state by adopting special equipment. The cohesive soil data are obtained through special drilling, the foundation is laid for follow-up analysis, the dynamic state of the cohesive soil is mastered in real time through data monitoring, the basis for studying the characteristics and change rules of the cohesive soil is built by combining the data with the special drilling data, the interaction between underground water and the cohesive soil is studied through a water pumping test, and key support is provided for prediction.

The invention provides a system calibration and verification method for a discontinuous graded cohesive soil DEM model. The system calibration and verification method comprises the following steps: (1) preliminarily determining microscopic parameter values of the DEM model; (2) sensitivity analysis of microscopic parameters of each DEM model; (3) gradually optimizing and iteratively analyzing each factor in combination with a sensitivity analysis result to obtain a microscopic parameter optimization value range of the DEM; (4) further optimizing the microscopic parameters of the DEM model based on Box-Behnken test design to obtain multiple groups of optimization parameter combinations; and (5) parameter verification. The method is reasonable in conception, integrates parameter calibration, precision verification and actual experiments, enables the purpose of parameter calibration to be clearer, can provide a more efficient and directional parameter calibration thought for cohesive soil with complex parameter calibration and fewer references, especially fine-grained soil or granular materials with extremely uneven grain size distribution, and is suitable for popularization and application. And meso-scale parameter calibration under quasi-static stress can be converted into parameter calibration and verification under dynamic load stress simulation.

The invention belongs to the technical field of thermal engineering of inorganic non-metallic materials, and particularly relates to a method for controlling the color of high-iron-content calcined clay. The method comprises the following steps: 1) crushing, drying and grinding a clay raw material to prepare a micron-sized powdery raw material, adding a CaO powdery material, and uniformly mixing; 2) feeding the mixed material into a connecting pipeline between a first-stage cyclone cylinder and a second-stage cyclone cylinder; and the materials are dispersed in the high-temperature flue gas at the outlet of the second-stage cyclone cylinder through a material scattering device arranged at the position in the connecting pipeline. By adopting the method, the atmosphere in the calcining and cooling stages does not need to be complexly controlled, and the technological process is simple. In the cooling stage, heat of high-temperature calcined clay can be efficiently recycled through ambient air, the recycled high-temperature air serves as combustion-supporting air for fuel combustion in the decomposing furnace, heat consumption is greatly reduced, and when the content of iron in the clay is higher than 5%, the calcined clay can also be kept gray.

The invention belongs to the technical field of geotechnical engineering field test, and particularly relates to a shallow silty clay stratum classification method based on a CPTU field penetration test, which comprises the following steps: utilizing the CPTU field penetration test, correcting a conical tip resistance model and combining a normalized friction ratio model; the vertical stress of the overlying soil layer, the effective vertical stress of the overlying soil layer and the atmospheric pressure are introduced, and a normalized conical tip resistance model is obtained; then, based on boundary conditions such as a soil body type index and silty clay stratum thickness, an existing correction coefficient is optimized, and the normalized conical tip resistance model is further corrected; and finally, substituting the normalized friction ratio model and the corrected normalized conical tip resistance model into the soil body type index model to obtain a corrected soil body type index model for dividing the shallow soil body. According to the scheme, the method can more accurately meet the requirement for soil body classification, can meet the requirement for distinguishing silty clay, silty soil and silty sand, and has the advantages of being rapid, simple, high in test result reliability and the like.

The utility model discloses a wrapped pile drilling and filling all-in-one machine which comprises a foundation mechanism and an executing mechanism, and the executing mechanism is connected to the foundation mechanism in a lifting mode. The basic mechanism comprises a power assembly, a walking assembly, a stand column and a supporting assembly, the stand column is arranged on one side of the walking assembly in a supported mode and supported through the supporting assembly, and the power assembly is arranged on the walking assembly and used for lifting the executing mechanism; the executing mechanism comprises a drilling assembly and a sleeve, the drilling assembly is arranged on the sliding rail of the stand column in a sleeving mode, and the drilling assembly is sleeved with the sleeve in a liftable mode; the power assembly comprises a main winch and an auxiliary winch. The all-in-one machine is suitable for treating mucky soil and soft plastic clayed soil foundations with undrained shear strength smaller than 20 kPa, and is particularly suitable for punching and pouring construction of saturated salinized soil foundation wrapped piles.

The invention relates to the technical field of unconventional shale oil and gas resource exploration, in particular to a shale shear wave velocity estimation method considering clay directional arrangement influence. According to the technical scheme, a shale compaction model is constructed, a shale directional arrangement background medium is formed, an orientation distribution function is used for simulating the elastic tensor of the background medium under different directional arrangement degrees, and the anisotropic speed of the background medium is calculated; calculating a longitudinal wave speed and a transverse wave speed in an equivalent isotropic background medium according to the anisotropic speed, and then calculating a bulk modulus and a shear modulus of the equivalent isotropic background medium; and adding clay-related pores and sand-related pores into an equivalent isotropic rock matrix by using an Xu-White model to obtain a bulk modulus and a shear modulus of dry shale, and finally simulating the shear wave velocity of the shale under the influence of directional arrangement of the clay. According to the invention, a new rock physical model is established to simulate the influence of clay directional arrangement, pore morphology, mineral and fluid properties on longitudinal and transverse wave velocities in shale.

In a method for the mechanical compaction of clayey earth material by means of a vibration plate, in which the vibration plate is guided as an end effector on a triaxial positioning system over the earth material to be compacted and the compressive force applied to the earth material is increased by controlling the positioning system for displacement perpendicular to the plate plane of the vibration plate, the degree of compaction of the earth material during compaction is measured and the compressive force, the duration of the stay of the vibration plate at the same place, the frequency of the vibration movement and / or the amplitude of the vibration movement is controlled as a function of the measured degree of compaction.

The invention discloses model tank experimental equipment and a freezing system thereof, and relates to the technical field of research on temperature field evolution and physical property change of soil in the clay freezing process, the model tank experimental equipment comprises a frame and a frame plate, the frame plate is arranged on the inner side of the frame, an adjusting unit is arranged at the transparent end of the frame, and the adjusting unit is connected with the frame plate. The adjusting unit is used for adjusting the size of the inner space of the frame, the top of the frame is provided with a crushing unit, the crushing unit is used for crushing soil blocks in the frame, the frame is provided with a water supplementing unit, the water supplementing unit is used for providing water for a soil body in the frame, and the adjusting unit comprises a movable plate; the caked soil body is crushed when the experimental soil body is added into the tank body, the density of the soil body is adjusted according to experimental requirements so as to be closer to the soil body during construction, in addition, the frozen experimental soil body is convenient to clean, and soil attached to the inner wall of the tank body is thoroughly cleaned.

The invention provides a cohesive soil early consolidation pressure detection method and device, and belongs to the technical field of geotechnical engineering detection.The cohesive soil early consolidation pressure detection method comprises the steps that a structured database is established based on engineering area historical drilling data and geotechnical test data; extracting data subsets corresponding to the soil texture types from the database, and respectively constructing mucky soil and conventional cohesive soil early consolidation pressure prediction models; acquiring a standard volume soil sample and density and water content data thereof; drilling position coordinates, orifice elevation, sampling depth and soil sample specific gravity parameters are input; selecting a prediction model according to the soil texture type, inputting related data, and outputting an early consolidation pressure value; and comparing the early consolidation pressure value with the current effective self-weight stress, and judging the consolidation state of the soil body. According to the method, the detection period of the early consolidation pressure of the cohesive soil body is shortened, subjective factors in the manual curve drawing process are eliminated, and the data accuracy and the working efficiency are improved.

The invention innovatively provides a three-water electric conduction model parameter calculation method based on nuclear magnetic resonance constrained conventional logging, aiming at the technical problems that three-water electric conduction model parameters are too many, and the model parameters can be determined only by using a large amount of rock core experiment data such as mercury injection, rock electricity experiments, clay analysis and cation exchange capacity in the prior art. According to the calculation method, the free fluid porosity, the micro capillary water porosity and the clay water porosity which are obtained through nuclear magnetic resonance logging interpretation are substituted into a formula of a three-water electric conduction model represented by conventional logging parameters and are combined with the porosity, the shale content, the irreducible water saturation and other parameters which are explained through conventional logging; finally, calculation of all model parameters can still be completed under the condition of not depending on experimental data, and during parameter calculation, the calculation precision is improved by adopting the optimization algorithm assistance of multiple groups of data depending on the characteristic that logging data has a big data sample.

The invention belongs to the technical field of oil field drilling, and particularly relates to a preparation method of modified sulfonated phenolic resin for drilling fluid, and the modified sulfonated phenolic resin is prepared by chemically bonding a functional monomer simultaneously containing sulfonic acid anions and quaternary ammonium cations in a phenolic resin structure in a free radical polymerization mode. The quaternary ammonium cation group adsorbs negatively-charged clay particles, the adamantyl group can be adsorbed in hydrophobic areas of the clay particles through association, and the sulfonated phenolic resin can be quickly adsorbed on the surface of the clay in a double adsorption mode of hydrogen bonds and electrostatic attraction. Besides, a large number of sulfonic acid anions can form a compact solvation layer after hydration, and a compact coating film can be formed when phenolic resin is quickly adsorbed on the surface of clay, so that the clay is prevented from being in contact with water, the stability of clay particles is realized, a compact mud cake can be formed, and the prepared phenolic resin has good filtrate loss reduction performance.

The invention discloses an ex-situ mixing remediation device for agricultural heavy metal contaminated soil. The ex-situ mixing remediation device comprises a box body as well as a crushing mechanism, a drying mechanism, a receiving mechanism, a spraying mechanism and a mixing mechanism which are sequentially arranged in the box body from top to bottom, the pair of drying mechanisms is arranged on the side wall of the box body in a mirroring mode, and the pair of bearing mechanisms is arranged on the side wall of the box body in a mirroring mode. Through the stirring mechanism and the swing mechanism arranged in the mixing and stirring mechanism, a good remediation effect can be achieved during mixing and stirring of soil and remediation liquid medicine; firstly, a stirring machine can swing and mix through a stirring arm and an adjusting arm when a main shaft rotates, and meanwhile, a scraping plate can lift soil on the bottom layer to the top layer to complete replacement and mixing; exchange and mixing of soil between the two stirring mechanisms can be achieved through the swing mechanism; furthermore, the material crushing mechanism can complete effective material crushing for the soil with relatively high viscosity, so that the defect that the clayed soil is easy to extrude into cakes by using a conventional crushing roller crushing mode is overcome.

The present invention relates to the field of sludge treatment technology, and more specifically, to a method for solidifying arsenic in high-arsenic sludge using clay and copper slag. The method involves drying the high-arsenic sludge at 105°C for 12 hours and grinding it to a particle size of less than 0.5 mm to obtain a dry material. The dry material is then mixed evenly with clay powder, copper slag, and coal powder. Water is then added, stirred at room temperature for a pre-reaction of 6 hours, and poured into a crucible to obtain a paste-like mixture A. The dry mixture A is then calcined at 850-900°C for 20-40 minutes under a protective atmosphere. The reaction product, after natural cooling, is then used as a roadbed material, for example. This method utilizes clay and copper slag calcination to treat high-arsenic sludge, resulting in low arsenic and other heavy metal leaching toxicity and excellent stability, while also fully utilizing metallurgical solid waste.

The invention discloses a cationic self-assembly high-temperature-resistant clay stabilizer and a preparation method thereof.The preparation method sequentially comprises the following steps that firstly, N-methylbenzylamine, diethylenetriamine and epichlorohydrin are subjected to a substitution reaction, and polyquaternary ammonium containing quaternary ammonium ions and benzyl is prepared; then carrying out a reaction on the mono6-amino-beta-cyclodextrin and epoxy chloropropane, so as to prepare a beta-cyclodextrin-epoxy chloropropane condensation compound; and finally, blending and assembling the two substances to generate the cation assembled compound with relatively high cation degree and high temperature resistance. Polyquaternary ammonium containing quaternary ammonium ions and benzyl in the cation assembly compound provides quaternary ammonium cations combined with anionic charges on the surface of stratum clay minerals on one hand, and provides benzene rings combined with beta-CD holes of the beta-cyclodextrin-epichlorohydrin condensation compound on the other hand. The prepared clay stabilizer has good high temperature resistance, has a good clay anti-swelling effect under a strong alkaline condition, and can improve the crude oil recovery rate.