High-activity gasified coal water slurry and preparation method thereof

Abstract

The invention provides a preparation method of high-activity gasified coal water slurry. The method comprises the following steps: crushing, grinding and screening raw coal to obtain coal powder; the pulverized coal is input into a coarse grinding machine, an aqueous solution containing an additive A is added, and the concentration of the pulverized coal in the aqueous solution is 50 wt%-70 wt%; grinding the aqueous solution to prepare high-concentration coarse pulp of which the particle size d (0.5) is less than 150 microns; the high-concentration coarse pulp is divided into a first part and a second part, and the second part of the high-concentration coarse pulp is reserved in a coarse grinding machine; the first part of high-concentration coarse slurry is prepared into slurry with the coal concentration of 35-45 wt%, then an additive B is added, and the mixture is input into a pulverizer to be pulverized into high-activity superfine coal water slurry with the particle size d (0.5) smaller than 15 micrometers; and returning the high-activity superfine coal water slurry to the coarse grinding machine, mixing the high-activity superfine coal water slurry with the second part of high-concentration coarse slurry, and continuously grinding to prepare coal water slurry without separation of free water, namely the high-activity gasified coal water slurry.

Description

Technical Field

[0001] The invention relates to the technical field of coal chemical industry, and in particular to a method for preparing high-activity gasified coal-water slurry, and the high-activity gasified coal-water slurry prepared by the method. Background Art

[0002] Coal-water slurry is an efficient and clean coal-based fuel. In recent years, coal-water slurry has been increasingly used in industry, such as in chemical industry and power generation. The preparation process of coal-water slurry mainly includes coal crushing, grinding, slurry preparation, filtration and maturation.

[0003] According to the national standard GB / T 31426-2015, the coal concentration of the first-level fuel water coal slurry (Coal water slurry for gasification) shall not be less than 63.0wt%, the second-level shall not be less than 59wt%, and the third-level shall not be less than 55wt%. At the same time, it must also have the stability of static high viscosity, high fluidity of dynamic low viscosity, low ash melting point, and high reactivity. At present, the coal used to prepare gasification water coal slurry is mainly low-rank coal. This type of coal resource is abundant (accounting for about 42% of my country's proven reserves), and it is a good gasification water coal slurry raw material and coal chemical raw material. Low-rank coal usually has the advantages of low ash melting point, many surface oxygen-containing functional groups, and good reactivity. However, low-rank coal also has the pulping disadvantages of high porosity, strong hydrophilicity, and poor grindability.

[0004] The main problems of pulping using conventional preparation technology are as follows: (1) Due to the high porosity and high hydrophilicity of low-rank coal, H in water-coal slurry is 2 O is difficult to gasify (the evaporation temperature can exceed 107°C, which is about 7°C higher than the normal boiling point of water, 100°C), resulting in high energy consumption for water-coal slurry gasification, which seriously affects the gasification efficiency and production benefits. (2) It is difficult to increase the pulping concentration. Due to poor grindability, the pulping concentration of low-rank coal is generally around 55%. The pulping concentration of lignite is even lower due to the high pore water content. (3) The particle size is relatively coarse. Due to poor grindability, low-rank coal also leads to coarse water-coal slurry particle size. The average particle size of commonly used gasification water-coal slurry is generally 80-120μm, and the particle size larger than 0.3mm is as high as about 20%, resulting in serious wear and tear of pumps, valves, pipelines, gasifier nozzles and other components for conveying coal slurry, and a short service life. In addition, coarse coal powder particles can easily lead to low stability and weak fluidity of water-coal slurry, making it difficult to store and transport.

[0005] At present, the discontinuous particle size grading technology has significantly improved the pulping concentration of low-rank coal. In order to solve the problems of high energy consumption, low gasification rate and poor grindability caused by high porosity and high hydrophilicity of low-rank coal, most of them use drying, shear force under high pressure and high temperature, hydrothermal treatment and other methods to destroy the capillary structure of low-rank coal. These methods can achieve the purpose of destroying pore structure and dehydration, but require large-scale drying equipment or high temperature and high pressure equipment, which not only increases equipment investment and energy consumption before gasification, but also complicates the production process. At present, there is no pulping process method that combines the method of destroying the pore structure of low-rank coal with the particle size grading technology in the same process.

[0006] Therefore, it is necessary to provide a method for preparing a highly active gasified coal-water slurry to solve the above-mentioned problems existing in the traditional method for preparing coal-water slurry. Summary of the invention

[0007] The main purpose of the present invention is to provide a method for separating the high-activity ultrafine water-coal slurry crushing process from the high-concentration water-coal slurry grinding process, combining the pore structure control of low-rank coal with the particle size grading technology, and preparing gasified water-coal slurry with high concentration, good dynamic fluidity and high reaction activity. Through the optimized preparation method, while meeting the high-concentration preparation requirements of gasified water-coal slurry, the activity, content and stability of ultrafine coal particles are guaranteed, and the purpose of preparing high-activity gasified water-coal slurry from low-rank coal is achieved.

[0008] In order to achieve the above object, the present invention provides a method for preparing a high-activity gasified coal-water slurry, comprising the following steps:

[0009] The coal powder is fed into a grinding device, the amount of water and additive A is calculated according to the concentration, and the coal powder is ground to obtain a coarse pulp (high concentration);

[0010] Taking a portion of the high-concentration crude pulp and inputting it into a pulverizer, calculating the amount of additive B according to the concentration, and pulverizing it to obtain an ultrafine water-coal slurry (low concentration) containing hydroxyl radicals (·OH); and

[0011] The ultrafine water-coal slurry is input into the above-mentioned grinding device for grinding and homogenization (high concentration) to obtain a highly active gasified water-coal slurry.

[0012] Additive A is a mixture of a dispersant and a stabilizer, and additive B is a carbon-based nanomaterial.

[0013] More specifically, the preparation method of the present invention comprises the following steps:

[0014] Step S1, preparation of coal powder: crushing, grinding and screening raw coal to obtain coal powder;

[0015] Step S2, preparation of high-concentration water-coal slurry: input the screened coal powder into a coarse grinder, add an aqueous solution containing additive A, the concentration of the coal powder in the aqueous solution is 50wt% to 70wt%; grind the aqueous solution to prepare a high-concentration coarse slurry with a particle size d(0.5) less than 150μm; divide the high-concentration coarse slurry into a first part and a second part, and retain the second part of the high-concentration coarse slurry in the coarse grinder;

[0016] Step S3, preparation of high-activity ultrafine water-coal slurry: prepare the first part of high-concentration crude slurry into a slurry containing coal at a concentration of 35wt% to 45wt%; add additive B; input into a pulverizer and pulverize into a high-activity ultrafine water-coal slurry with a particle size d(0.5) less than 15μm;

[0017] Step S4, preparation of high-activity gasification water-coal slurry: return the high-activity ultrafine water-coal slurry prepared in step S3 to the coarse grinder in step S2, mix it with the second part of high-concentration coarse slurry and continue to grind it to prepare a water-coal slurry without free water precipitation, that is, to obtain a high-activity gasification water-coal slurry.

[0018] Preferably, in step S1, the raw coal can be crushed, ground and sieved to obtain coal powder with a particle size of less than 0.5 mm.

[0019] In this article, "d(0.5)" is a parameter that expresses the particle size distribution, also known as the median particle size, which indicates the particle size corresponding to when the cumulative particle size distribution percentage of the sample reaches 50%. In a physical sense, this means that particles with a particle size greater than d(0.5) account for 50%, and particles with a particle size less than d(0.5) also account for 50%. There are many ways to measure d(0.5), such as laser diffraction. "d(0.1)" and "d(0.9)" that appear below correspond to the particle sizes of 10% and 90%, respectively.

[0020] Furthermore, in step S2, the weight ratio of the second part of high-concentration crude pulp to the first part of high-concentration crude pulp is 70-90:30-10.

[0021] Within this ratio range, the solid content of the suspension system can be increased, its flow properties and stability can be improved, and the energy density and combustion efficiency can be increased.

[0022] Furthermore, in step S2, the dispersant is one or more selected from lignin sulfonate, naphthalene sulfonate and humate; the stabilizer is one or more selected from carboxymethyl fiber, polyacrylamide, xylan, plant gum and inorganic minerals; the total amount of additive A added in step S2 is 0.1% to 2% of the weight of the coal powder; and the weight ratio of the dispersant to the stabilizer is 1 to 10:0.05 to 5.

[0023] Dispersants can reduce the interfacial tension between coal powder and water, enhance the hydrophilicity of coal powder, and make coal powder particles evenly dispersed in water, thereby improving the fluidity and stability of the slurry; stabilizers can enhance the interaction between coal powder particles and improve possible precipitation and aggregation. Dispersants and stabilizers within the above range can synergistically obtain high-concentration, good fluidity and good stability of water-coal slurry.

[0024] Preferably, the grinding of high-concentration coarse pulp can be carried out by the following method: the coal is crushed into a particle size of less than 3 mm by dry crushing, and then wet rod milled, ball milled or vibrated to a particle size d(0.5) of less than 150 μm.

[0025] Furthermore, the concentration of coal powder in the ultrafine water-coal slurry in step S3 is 35wt% to 45wt%.

[0026] Furthermore, in step S3, the carbon-based nanomaterial is one or more selected from activated carbon powder, graphene, nanocarbon fibers, carbon nanotubes, nanocarbon spheres and their modified products; and the total amount of additive B added is 50ppm to 500ppm of the weight of the coal powder.

[0027] Additive B can help destroy the pore structure of low-rank coal, so that the water-coal slurry has higher calorific value and combustion efficiency.

[0028] Furthermore, the pulverization method for the slurry in step S3 is a method that can generate ·OH, and specifically can be selected from one or more of the methods of hydrodynamic cavitation, ultrasonic cavitation, arc micro-explosion and microwave radiation.

[0029] These methods are beneficial to the production of ·OH, thus improving the activity, content and stability of ultrafine coal particles.

[0030] Furthermore, the ultrafine coal water slurry prepared in step S3 is input into the coarse grinder in step 2, and is dispersed by a coal water slurry agitator / or shearing and stirring until no free water is precipitated.

[0031] The present invention combines the method of destroying the pore structure of low-rank coal with the particle size grading technology in the same process. Compared with the water-coal slurry prepared by the simple particle size grading technology (the simple grading only considers the particle size distribution, and does not consider the free radical activation of ultrafine particles), the high-activity gasification water-coal slurry prepared by the present invention has higher stability and higher reaction activity, and the pyrolysis rate of coal is significantly improved.

[0032] Furthermore, after step S4, the method further comprises filtering, shearing and maturing the water-coal slurry to produce a finished gasified water-coal slurry.

[0033] Furthermore, in step S1, the raw coal is selected from one or more of bituminous coal, sub-bituminous coal and lignite.

[0034] According to another aspect of the present invention, there is provided a high-activity gasified coal-water slurry, which is obtained by the above-mentioned method for preparing the high-activity gasified coal-water slurry.

[0035] The concentration of the high-activity gasification water-coal slurry of the present invention can reach ≥59.0%; the coal particles smaller than 75 μm in the water-coal slurry account for 40% to 50% of the weight of the coal powder.

[0036] The high-activity water-coal slurry of the present invention is not only suitable for coal gasification, but also suitable for producing hydrogen by electrolyzing water-coal slurry.

[0037] In summary, the advantages of the present invention are at least reflected in the following aspects:

[0038] (1) The present invention does not require microwave drying, shear force under high pressure and high temperature, or hydrothermal treatment to destroy the capillary structure of low-rank coal and dehydrate to increase the concentration of water-coal slurry, thereby reducing the energy consumption and process difficulty of low-rank coal quality improvement processing;

[0039] (2) The present invention integrates the pore structure control and particle size distribution of low-rank coal into the same process through the pulverization methods that can produce ·OH, such as hydrodynamic cavitation, ultrasonic cavitation, arc micro-explosion, and microwave radiation, to ensure the activity, content, stability and particle size distribution requirements of ultrafine coal particles, and achieve the purpose of preparing high-activity gasification water-coal slurry from low-rank coal.

[0040] (3) The preparation method provided by the present invention extracts 10wt% to 30wt% of the crude water-coal slurry and grinds and refines it after dilution, which reduces the difficulty of preparing ultrafine coal particles and also reduces the load and energy consumption of repeated grinding and refining in the grinding process.

[0041] (4) The high-activity gasification water-coal slurry prepared by the present invention has high concentration, static stability, good dynamic fluidity, high reaction activity, and its d(0.5) is less than 15 μm; -1 The apparent viscosity under shear rate is lower than 1300mPa.s; compared with the crude coal water slurry, the H 2 The evaporation temperature of O decreased from more than 100°C to less than 100°C; the pyrolysis rate of coal was significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0043] Figure 1 The technical flow chart of the present invention is shown.

[0044] Figure 2 A graph showing the particle size distribution of the highly active gasification coal water slurry of Example 1 of the present invention.

[0045] Figure 3 A graph showing the TG-DSC thermal stability of the crude coal water slurry of Example 1 of the present invention.

[0046] Figure 4 A graph showing the TG-DSC thermal stability of the highly active ultrafine coal water slurry of Example 1 of the present invention.

[0047] Figure 5 A graph showing the TG-DSC thermal stability of the high-activity gasification coal-water slurry of Example 1 of the present invention.

[0048] Figure 6 A graph showing the dynamic viscosity of the highly active gasification coal water slurry of Example 1 of the present invention. DETAILED DESCRIPTION

[0049] The present application is further described in detail below in conjunction with examples. These examples are intended to better further understand the present invention, are not limited to the best mode of implementation, and do not limit the content and protection scope of the present invention. Any product that is the same or similar to the present invention and is obtained by anyone under the inspiration of the present invention or by combining the present invention with the features of other prior arts falls within the protection scope of the present invention.

[0050] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The experimental methods used in the following embodiments are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial sources.

[0051] Example 1

[0052] Preparation flow chart Figure 1 shown.

[0053] The raw coal used in this embodiment is Junneng-5500 coal with a high ash content, and the specific process is as follows:

[0054] (1) The Junneng-5500 coal (provided by the Har Usu open-pit coal mine) was crushed into coal powder with a particle size of about 20 mesh using a crusher.

[0055] (2) The crushed coal powder is sent to a coarse ball mill, and an aqueous solution containing additive A is added (wherein additive A is a mixture mainly composed of lignin sulfonate, and the addition amount is 0.3wt% of the dry coal powder mass, and the coal powder concentration is 52wt%), and high-concentration ball milling is performed to make pulp. The particle size of the coarse water coal is controlled to be less than 150μm at d(0.5).

[0056] (3) Extract 25wt% of the crude water-coal slurry into a hydrodynamic cavitation reaction tank, add water to prepare a low-concentration water-coal slurry with a coal powder concentration of 30wt%, and add 200ppm of multi-walled carbon nanotubes. The hydrodynamic cavitation reaction tank first enters a low-speed state (speed of 500-1000 rpm) to mix the low-concentration water-coal slurry and additive B evenly; then enters a high-speed state (speed of 2000-25000 rpm) to cavitation the water-coal slurry. Cavitation treatment is performed until the particle size d(0.5) of the water-coal slurry is 2.843μm.

[0057] (4) The active ultrafine coal slurry prepared in step (3) is quickly fed into the high-concentration water-coal slurry prepared in step (2), and dispersed by a water-coal slurry agitator to prepare a high-concentration water-coal slurry without free water precipitation.

[0058] (5) The prepared coal slurry is filtered to remove impurities, and then subjected to dry treatment such as stirring, high shearing and homogenization to obtain a gasified water-coal slurry product.

[0059] The effect of this embodiment can be more clearly shown in conjunction with the accompanying drawings.

[0060] Figure 2 The particle size distribution diagram of this embodiment is shown, where d(0.1)=0.427 μm, d(0.5)=2.843 μm, and d(0.9)=89.529 μm.

[0061] Figure 3 , Figure 4 and Figure 5 The TG-DSC thermal stability diagrams of the crude water-coal slurry, the highly active ultrafine water-coal slurry and the highly active gasified water-coal slurry in this embodiment are shown respectively. TG-DSC is a combined thermal analysis technique combining thermogravimetric analysis (TG) and differential scanning calorimetry (DSC), which can be measured by a TG-DSC synchronous thermal analyzer.

[0062] Figure 6 The figure shows the dynamic viscosity of the high-activity gasification water-coal slurry of this example, which is measured by the rheometer software (Anton Paar RheoCmpass) of Anton Paar.

[0063] The water-coal slurry prepared in this embodiment has high reaction activity. Compared with the crude water-coal slurry, H 2 The evaporation temperature of O was reduced from 107.18℃ to 81.45℃, and the pyrolysis rate of coal was also greatly improved. The concentration of the water-coal slurry prepared in this embodiment was 63.5%, d(0.5)=2.843μm, and the fluidity and rheology of the water-coal slurry were good. At a temperature of 30℃, the shear rate was 100s-1 The viscosity is 780mPa.s, and the stability is more than 30 days without stratification, free water precipitation (according to GB / T 18856.5-2008 water-coal slurry stability determination method), and no hard precipitation, which meets the first-level quality requirements of national standard GB / T 31426-2015 gasification coal slurry.

[0064] Example 2

[0065] Preparation flow chart Figure 1 shown.

[0066] The raw coal used in this embodiment is Junneng-4000 coal with high ash content, and the specific process is as follows:

[0067] (1) The Junneng-4000 coal (provided by the Har Usu open-pit coal mine) was crushed into coal powder with a particle size of about 20 mesh using a crusher.

[0068] (2) The crushed coal powder is sent to a coarse ball mill, and an aqueous solution containing additive A is added (wherein the additive is a mixture mainly composed of lignin sulfonate, and the addition amount is 0.5wt% of the mass of dry coal powder) to carry out high-concentration ball milling and pulping. The particle size of the coarse water coal is controlled to be less than 150μm at d(0.5).

[0069] (3) Extract 20wt% of the crude water-coal slurry into a hydrodynamic cavitation reaction tank, add water to prepare a low-concentration water-coal slurry with a coal powder concentration of 38wt%, and add 300ppm of additive B. The hydrodynamic cavitation reaction tank first enters a low-speed state to mix the low-concentration water-coal slurry and additive B evenly; then enters a high-speed state to perform cavitation treatment on the water-coal slurry. The cavitation treatment is performed until the particle size d(0.5) of the water-coal slurry is less than 15μm.

[0070] (4) The active ultrafine coal slurry prepared in step (3) is quickly fed into the high-concentration water-coal slurry prepared in step (2) for proper grinding to prepare a high-concentration water-coal slurry without free water precipitation.

[0071] (5) The prepared coal slurry is filtered to remove impurities, and then subjected to dry treatment such as stirring, high shearing and homogenization to obtain a gasified water-coal slurry product.

[0072] The concentration of the water-coal slurry prepared in this embodiment is 61%, d(0.5)=10.52μm; the water-coal slurry has good fluidity and rheology. At a temperature of 30°C, the shear rate is 100s -1 The viscosity is 1100mPa.s, and the stability is more than 30 days without stratification, free water precipitation, and hard precipitation, meeting the secondary quality requirements of the national standard GB / T 18855-2014 gasification coal slurry.

[0073] Example 3

[0074] Preparation flow chart Figure 1 shown.

[0075] The raw coal used in this embodiment is Shuangyashan lignite with high water content, and the specific process is as follows:

[0076] (1) The Shuangyashan lignite (provided by the Har Usu open-pit coal mine) was crushed into coal powder with a particle size of about 20 mesh using a crusher.

[0077] (2) The crushed coal powder is sent to a coarse ball mill, and an aqueous solution containing additive A is added (wherein the additive is a mixture mainly composed of lignin sulfonate, and the addition amount is 0.2wt% of the mass of dry coal powder) to perform high-concentration ball milling to make pulp. The particle size of the coarse water coal is controlled to be less than 150μm at d(0.5).

[0078] (3) 25 wt% of the crude water-coal slurry is extracted into a hydrodynamic cavitation reaction tank, water is added to prepare a low-concentration water-coal slurry with a coal powder concentration of 30 wt%, and 300 ppm of additive B is added. The hydrodynamic cavitation reaction tank first enters a low-speed state to mix the low-concentration water-coal slurry and additive B evenly; then enters a high-speed state to perform cavitation treatment on the water-coal slurry. The cavitation treatment is performed until the particle size d(0.5) of the water-coal slurry is less than 15 μm.

[0079] The concentration of the water-coal slurry prepared in this embodiment is 55.5%, d(0.5)=10.923 μm; the fluidity and rheological properties of the water-coal slurry are good, and the shear rate is 100 s at a temperature of 30°C. -1 The viscosity is 1180mPa.s, and the stability is more than 20 days without stratification, free water precipitation, and hard precipitation, meeting the third-level quality requirements of the national standard GB / T 18855-2014 gasification coal slurry.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a highly active gasified coal-water slurry, characterized in that: The method comprises the following steps: Step S1, preparation of coal powder: crushing, grinding and screening raw coal to obtain coal powder; Step S2, preparation of high-concentration water-coal slurry: input the coal powder into a coarse grinder, add an aqueous solution containing additive A, the concentration of the coal powder in the aqueous solution is 50wt% to 70wt%; grind the aqueous solution to prepare a high-concentration coarse slurry with a particle size d(0.5) less than 150μm; divide the high-concentration coarse slurry into a first part and a second part, and retain the second part of the high-concentration coarse slurry in the coarse grinder; Step S3, preparation of high-activity ultrafine water-coal slurry: the first part of high-concentration crude slurry is prepared into a slurry containing coal at a concentration of 35wt% to 45wt%, and then the additive B is added, and the slurry is input into a pulverizer and pulverized into a high-activity ultrafine water-coal slurry with a particle size d(0.5) less than 15μm; Step S4, preparation of high-activity gasification water-coal slurry: returning the high-activity ultrafine water-coal slurry prepared in step S3 to the coarse grinder described in step S2, mixing with the second part of high-concentration coarse slurry and continuing to grind to prepare a water-coal slurry without free water precipitation, that is, obtaining the high-activity gasification water-coal slurry, Wherein, the additive A is a mixture of a dispersant and a stabilizer, and the additive B is a carbon-based nanomaterial.

2. The method for preparing a highly active gasified coal water slurry according to claim 1, characterized in that: In step S2, the weight ratio of the second part of high-concentration crude pulp to the first part of high-concentration crude pulp is 70-90:30-10.

3. The method for preparing a highly active gasified coal water slurry according to claim 1 or 2, characterized in that: The particle size of the coal powder in step S1 is less than 200 meshes.

4. The method for preparing a highly active gasified coal water slurry according to claim 1 or 2, characterized in that: In step S2, the dispersant is one or more selected from lignin sulfonate, naphthalene sulfonate and humate; the stabilizer is one or more selected from carboxymethyl fiber, polyacrylamide, xylan, plant gum and inorganic minerals.

5. The method for preparing highly active gasified coal water slurry according to claim 4, characterized in that: In step S2, the total amount of the additive A added is 0.1% to 2% of the weight of the coal powder; and the weight ratio of the dispersant to the stabilizer is 1 to 10: 0.05 to 5.

6. The method for preparing a highly active gasified coal water slurry according to claim 1 or 2, characterized in that: The carbon-based nanomaterial in step S3 is one or more selected from activated carbon powder, graphene, nanocarbon fibers, carbon nanotubes, nanocarbon balls and their modified products; and the total amount of the additive B added is 50ppm to 500ppm of the weight of the coal powder.

7. The method for preparing a highly active gasified coal water slurry according to claim 1 or 2, characterized in that: The pulverizing method used for the slurry in step S3 is selected from one or more of hydrodynamic cavitation, ultrasonic cavitation, arc micro-explosion and microwave radiation.

8. The method for preparing highly active gasified coal water slurry according to claim 1 or 2, characterized in that: After step S4, the method further comprises filtering, shearing and maturing the water-coal slurry to produce a finished gasified water-coal slurry.

9. The method for preparing highly active gasified coal water slurry according to claim 1 or 2, characterized in that: The raw coal in step S1 is selected from one or more of bituminous coal, sub-bituminous coal and lignite.

10. A highly active gasified coal-water slurry, characterized in that: The high-activity gasification water-coal slurry is obtained by the preparation method of the high-activity gasification water-coal slurry according to any one of claims 1 to 9.

Images