A concentrated liquid composition for hydraulic supports and a method for its preparation and use

Abstract

This invention discloses a concentrated fluid composition for hydraulic supports, its preparation method, and its application. The concentrated fluid composition, by weight, comprises: 0.5-2 parts by weight of inorganic alkali, 8-12 parts by weight of organic alcohol amine, 4-10 parts by weight of polyether, 7-12 parts by weight of diol, 0.2-0.8 parts by weight of tetrasodium ethylenediaminetetraacetate, 10-15 parts by weight of composite rust inhibitor, 0.05-0.5 parts by weight of benzotriazole, 0.01-0.1 parts by weight of defoamer, and 55-65 parts by weight of water. The concentrated fluid composition for hydraulic supports of this invention, with the addition of a large amount of antifreeze, uses polyether as a lubricant, replacing commonly used greases that easily form high-viscosity and viscoelastic micelles due to low temperatures. The product exhibits excellent freeze-thaw resistance and does not use emulsifiers prohibited by the list. The production process of this invention mixes organic alcohol amines with high freezing points with diols to form a first mixture. During production, the organic alcohol amines can be stored in the form of the first mixture in winter to avoid freezing and condensation, thereby improving production efficiency and reducing production losses.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic support fluid technology for coal mines, specifically relating to a concentrated fluid composition for hydraulic supports, its preparation method, and its application. Background Technology

[0002] Recently, 14 new pollutants, including antibiotics and nonylphenol, have been included in the key control scope and subject to environmental risk management measures such as prohibition, restriction, and emission limitation. Among them, nonylphenol (number 12) is an endocrine disruptor that has recently attracted widespread public attention. In my country, nonylphenol is mainly used to produce surfactants—nonylphenol polyoxyethylene ethers. Nonylphenol polyoxyethylene ethers are commonly used emulsifiers in hydraulic support fluid products, including OP series, TX series, and NP series emulsifier brands. Under this nonylphenol ban, it is necessary to optimize and upgrade hydraulic support fluid products and formulate response plans under the list of prohibited substances.

[0003] Meanwhile, because hydraulic support fluid is a high-water-content product, it may develop flocculent matter, viscous substances, crystallization, or even freezing when stored at low temperatures, especially in coal mines in Northwest and Northeast China where the low-temperature problem is more severe. Therefore, there is an urgent need for a hydraulic support fluid concentrate composition with excellent freeze-thaw resistance to improve this situation. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention proposes a concentrated fluid composition for hydraulic supports, its preparation method, and its application. This concentrated fluid composition for hydraulic supports does not contain nonylphenol polyoxyethylene ether emulsifiers and exhibits excellent freeze-thaw resistance.

[0005] Therefore, in a first aspect, the present invention provides a concentrated fluid composition for hydraulic supports, comprising, by weight, the following components: 0.5-2 parts by weight of inorganic alkali, 8-12 parts by weight of organic alcohol amine, 4-10 parts by weight of polyether, 7-12 parts by weight of diol, 0.2-0.8 parts by weight of tetrasodium ethylenediaminetetraacetate, 10-15 parts by weight of composite rust inhibitor, 0.05-0.5 parts by weight of benzotriazole, 0.01-0.1 parts by weight of defoamer, and 55-65 parts by weight of water.

[0006] Specifically, the hydraulic support concentrate composition of the present invention uses polyether as a lubricant, replacing commonly used greases (such as tall oil, sulfonated castor oil, etc.) that are prone to entanglement and formation of high-viscosity and viscoelastic micelles due to low temperatures. Furthermore, it eliminates the use of emulsifiers and adds a large amount of diol antifreeze, resulting in a product with excellent freeze-thaw resistance. Since the hydraulic support concentrate composition provided by the present invention does not require the use of emulsifiers, it does not contain emulsifiers prohibited by the list (such as nonylphenol polyoxyethylene ether emulsifiers).

[0007] As a specific embodiment of the present invention, preferably, the concentrated liquid composition comprises the following components:

[0008] Inorganic base 1.0-1.5 parts by weight, and / or,

[0009] 9-11 parts by weight of organic alcohol amines, and / or,

[0010] 6-8 parts by weight of polyether, and / or

[0011] 8-10 parts by weight of diol, and / or,

[0012] 0.3-0.7 parts by weight of tetrasodium ethylenediaminetetraacetate, and / or,

[0013] 11.5-13 parts by weight of composite rust inhibitor, and / or,

[0014] 0.3-0.5 parts by weight of benzotriazole, and / or,

[0015] Defoamer 0.05-0.1 parts by weight.

[0016] As a specific embodiment of the present invention, the present invention proposes a concentrated fluid composition for hydraulic supports, which, by weight, comprises the following components: 0.5-2 parts by weight of inorganic alkali, 8-12 parts by weight of organic alcohol amine, 4-10 parts by weight of polyether, 7-12 parts by weight of diol, 0.2-0.8 parts by weight of tetrasodium ethylenediaminetetraacetate, 10-15 parts by weight of composite rust inhibitor, 0.05-0.5 parts by weight of benzotriazole, 0.01-0.1 parts by weight of defoamer, and 55-65 parts by weight of water.

[0017] As a specific embodiment of the present invention, the concentrated liquid composition does not contain an oiling agent. Preferably, the oiling agent includes at least one of tall oil, sulfonated castor oil, and oleic acid.

[0018] As a specific embodiment of the present invention, the concentrated liquid composition does not contain emulsifiers, especially nonylphenol polyoxyethylene ether emulsifiers.

[0019] As a specific embodiment of the present invention, the inorganic base includes at least one of KOH and NaOH.

[0020] As a specific embodiment of the present invention, the organic alcohol amine includes at least one of triisopropanolamine, triethanolamine and monoethanolamine.

[0021] As a specific embodiment of the present invention, the polyether includes at least one of dodecyl alcohol polyoxyethylene ether (lauryl alcohol polyoxyethylene ether) and allyl alcohol polyoxyalkyl ether.

[0022] As a specific embodiment of the present invention, the polyether is selected from at least one of dodecyl alcohol polyoxyethylene ether (lauryl alcohol polyoxyethylene ether) and allyl alcohol polyoxyalkyl ether.

[0023] As a specific embodiment of the present invention, the diol includes at least one of ethylene glycol, propylene glycol and butanediol.

[0024] As a specific embodiment of the present invention, the composite rust inhibitor includes an organic salt rust inhibitor and an inorganic salt rust inhibitor; the mass ratio of the organic salt rust inhibitor to the inorganic salt rust inhibitor is (2-4):(9-11), preferably 3:10.

[0025] As a specific embodiment of the present invention, the organic salt rust inhibitor comprises a tricarboxylate, preferably, the tricarboxylate comprises at least one of 2,4,6-tris(aminohexanoyl)-1,3,5-triazine; and / or,

[0026] The inorganic salt rust inhibitor includes at least one of sodium nitrite, carbonate, potassium dichromate, and sodium borate.

[0027] As a specific embodiment of the present invention, the defoamer includes at least one of organosiloxane defoamers and polyether-modified siloxane defoamers.

[0028] Therefore, in a second aspect, the present invention provides a method for preparing the concentrated fluid composition for hydraulic supports, comprising: heating and mixing an organic alcohol amine, a diol, an inorganic base, a polyether, a tetrasodium ethylenediaminetetraacetate, a composite rust inhibitor, a benzotriazole, an antifoaming agent, and water to obtain the composition.

[0029] As a specific embodiment of the present invention, the preparation method preferably includes the following steps:

[0030] S1: Mix the diol and organic alcohol amine evenly to obtain the first mixture;

[0031] S2: Heat and mix water, inorganic alkali, polyether, and the first mixture until homogeneous to obtain the second mixture;

[0032] S3: Add ethylenediaminetetraacetic acid tetrasodium, composite rust inhibitor and benzotriazole to the second mixture obtained in step S2, heat and mix evenly to obtain the third mixture;

[0033] S4: Cool the third mixture obtained in step S3, add defoamer, mix evenly, and obtain the concentrated liquid composition for hydraulic support.

[0034] In a specific embodiment of the present invention, in steps S2 and S3, the heating temperature is independently 50-60°C; the mixing method is independently stirring, the stirring rate is preferably 300-800 rpm, and the stirring time is preferably 1-2 hours.

[0035] In a specific embodiment of the present invention, in step S4, the temperature is lowered to room temperature, the mixing method is stirring, the stirring rate is preferably 300-800 rpm, and the stirring time is preferably 20-60 min.

[0036] Therefore, in a third aspect, the present invention provides the application of the concentrated fluid composition for hydraulic supports in the field of hydraulic supports under cryogenic conditions.

[0037] All of the above-mentioned raw materials used in this invention can be prepared in-house or purchased commercially; this invention does not impose any particular limitations on them.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] First, the hydraulic support concentrate composition of the present invention uses polyether as a lubricant to replace commonly used greases (such as tall oil, sulfonated castor oil, etc.) that are prone to entanglement and form high viscosity and viscoelastic micelles due to low temperature. At the same time, emulsifiers are no longer used, and a large amount of diol antifreeze is added on this basis, resulting in a product with excellent freeze-thaw resistance.

[0040] Secondly, in the preparation process of the hydraulic support concentrate composition of the present invention, an organic alcohol amine with a high freezing point is mixed with a diol to form a first mixture, and the mixture is stored in the form of the first mixture to avoid freezing in winter, thereby improving production efficiency and reducing production losses. Detailed Implementation

[0041] The embodiments of the present invention will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of the invention. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer are followed. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0042] Example 1

[0043] This embodiment provides a concentrated fluid composition for hydraulic supports and its preparation method, specifically including the following steps:

[0044] S1: Add 7.0 parts by weight of ethylene glycol and 9.0 parts by weight of triethanolamine to a mixing vessel, stir at room temperature for more than 1 hour until transparent and homogeneous, to obtain the first mixture;

[0045] S2: Add 64.3 parts by mass of water, 1.0 parts by mass of KOH and 5.0 parts by mass of dodecyl alcohol polyoxyethylene ether (number average molecular weight 1199.543 Da) to the first mixture obtained in step S1, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the second mixture;

[0046] S3: Add 0.30 parts by weight of tetrasodium ethylenediaminetetraacetate, 3.0 parts by weight of tricarboxylate (2,4,6-tris(aminohexanoic acid)-1,3,5-triazine), 10.0 parts by weight of sodium nitrite and 0.30 parts by weight of benzotriazole to the second mixture obtained in step S2, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the third mixture;

[0047] S4: Stop heating the second mixture obtained in step S3, cool it to room temperature, add 0.1 parts by weight of organosiloxane defoamer (brand name MS-575), stir for 30 minutes, and obtain the concentrated liquid composition.

[0048] Example 2

[0049] This embodiment provides a concentrated fluid composition for hydraulic supports and its preparation method, specifically including the following steps:

[0050] S1: Add 7.0 parts by weight of ethylene glycol and 11.0 parts by weight of triethanolamine to a mixing vessel, stir at room temperature for more than 1 hour until transparent and homogeneous, to obtain the first mixture;

[0051] S2: Add 63.2 parts by mass of water, 1.0 parts by mass of KOH and 5.0 parts by mass of dodecyl alcohol polyoxyethylene ether (number average molecular weight 1199.543 Da) to the first mixture obtained in step S1, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the second mixture;

[0052] S3: Add 0.50 parts by weight of tetrasodium ethylenediaminetetraacetate, 2.7 parts by weight of tricarboxylate (2,4,6-tris(aminohexanoic acid)-1,3,5-triazine), 9.0 parts by weight of sodium nitrite and 0.50 parts by weight of benzotriazole to the second mixture obtained in step S2, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the third mixture;

[0053] S4: Stop heating the second mixture obtained in step S3, cool it to room temperature, add 0.1 parts by weight of organosiloxane defoamer (brand name MS-575), stir for 30 minutes, and obtain the concentrated liquid composition.

[0054] Example 3

[0055] This embodiment provides a concentrated fluid composition for hydraulic supports and its preparation method, specifically including the following steps:

[0056] S1: Add 10.0 parts by weight of ethylene glycol and 9.0 parts by weight of triethanolamine to a mixing vessel, stir at room temperature for more than 1 hour until transparent and homogeneous, to obtain the first mixture;

[0057] S2: Add 59.75 parts by mass of water, 1.5 parts by mass of KOH and 7.0 parts by mass of dodecyl alcohol polyoxyethylene ether (number average molecular weight 1199.543 Da) to the first mixture obtained in step S1, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the second mixture;

[0058] S3: Add 0.7 parts by mass of tetrasodium ethylenediaminetetraacetate, 2.7 parts by mass of tricarboxylate (2,4,6-tris(aminohexanoic acid)-1,3,5-triazine), 9.0 parts by mass of sodium nitrite and 0.30 parts by mass of benzotriazole to the second mixture obtained in step S2, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the third mixture;

[0059] S4: Stop heating the second mixture obtained in step S3, cool it to room temperature, add 0.05 parts by weight of organosiloxane defoamer (brand name MS-575), stir for 30 minutes, and obtain the concentrated liquid composition.

[0060] Example 4

[0061] This embodiment provides a concentrated fluid composition for hydraulic supports and its preparation method, specifically including the following steps:

[0062] S1: Add 10.0 parts by weight of ethylene glycol and 11.0 parts by weight of triethanolamine to a mixing vessel, stir at room temperature for more than 1 hour until transparent and homogeneous, to obtain the first mixture;

[0063] S2: Add 56.45 parts by mass of water, 1.5 parts by mass of KOH and 7.0 parts by mass of dodecyl alcohol polyoxyethylene ether (number average molecular weight 1199.543 Da) to the first mixture obtained in step S1, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the second mixture;

[0064] S3: Add 0.5 parts by mass of tetrasodium ethylenediaminetetraacetate, 3.0 parts by mass of tricarboxylate (2,4,6-tris(aminohexanoic acid)-1,3,5-triazine), 10.0 parts by mass of sodium nitrite and 0.50 parts by mass of benzotriazole to the second mixture obtained in step S2, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the third mixture;

[0065] S4: Stop heating the second mixture obtained in step S3, cool it to room temperature, add 0.05 parts by weight of organosiloxane defoamer (brand name MS-575), stir for 30 minutes, and obtain the concentrated liquid composition.

[0066] Comparative Example 1

[0067] This comparative example provides a concentrated fluid composition for hydraulic supports and its preparation method, specifically including the following steps:

[0068] S1: Add 10.0 parts by weight of ethylene glycol and 11.0 parts by weight of triethanolamine to a mixing vessel, stir at room temperature for more than 1 hour until transparent and homogeneous, to obtain the first mixture;

[0069] S2: Add 54.45 parts by weight of water, 1.5 parts by weight of KOH, 2.0 parts by weight of nonylphenol polyoxyethylene ether (brand name OP-10) and 7.0 parts by weight of sulfonated castor oil to the first mixture obtained in step S1, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the second mixture;

[0070] S3: Add 0.5 parts by mass of tetrasodium ethylenediaminetetraacetate, 3.0 parts by mass of tricarboxylate (2,4,6-tris(aminohexanoic acid)-1,3,5-triazine), 10.0 parts by mass of sodium nitrite and 0.50 parts by mass of benzotriazole to the second mixture obtained in step S2, and stir at 55°C for more than 1 hour until transparent and homogeneous to obtain the third mixture;

[0071] S4: Stop heating the second mixture obtained in step S3, cool it to room temperature, add 0.05 parts by weight of organosiloxane defoamer (brand name MS-575), stir for 30 minutes, and obtain the concentrated liquid composition.

[0072] Comparative Example 2

[0073] The difference from Comparative Example 1 is that the mass fraction of sulfonated castor oil in step S2 is replaced by 5.0 instead of 7.0.

[0074] The components and their contents of Examples 1-4 and Comparative Example 1 are listed in Table 1.

[0075] Table 1

[0076]

[0077]

[0078] Comparative Example 3

[0079] The grade is HFAS10-5, a concentrated fluid for hydraulic supports.

[0080] Comparative Example 4

[0081] The grade is HFAS10-4, a concentrated solution for hydraulic supports.

[0082] Test Example 1

[0083] The hydraulic support concentrate compositions obtained in Examples 1-4 of this invention were compared and analyzed with commercially available products in Comparative Examples 1-2 according to the technical requirements of the coal industry standard MT / 76-2011 "Emulsified Oil, Concentrate and High Water Content Hydraulic Fluid for Hydraulic Supports". The results are shown in Table 2.

[0084] Table 2. Experimental results of Examples 1-4 and Comparative Examples 1-4

[0085]

[0086]

[0087] After testing, the hydraulic support concentrate compositions of Examples 1-4, the hydraulic support concentrate compositions of Comparative Examples 1-2, and the commercially available products of Comparative Examples 3-4 all met the requirements of coal industry standards. Since the hydraulic support concentrate compositions of Examples 1-4 do not require the addition of oiling agents and nonylphenol polyoxyethylene ether emulsifiers, they exhibit superior environmental performance.

[0088] Test Example 2

[0089] The freeze-thaw resistance of the concentrated liquid compositions for hydraulic supports in Examples 1-4, the concentrated liquid compositions for hydraulic supports in Comparative Examples 1-2, and the commercially available products in Comparative Examples 3-4 were specifically investigated.

[0090] The concentrated liquid compositions for hydraulic supports of Examples 1-4, the concentrated liquid compositions for hydraulic supports of Comparative Examples 1-2, and the commercially available products of Comparative Examples 3-4 were frozen at -10°C, -15°C, -20°C, and -25°C for 8 hours, respectively. Then they were taken out and placed in an environment of 4°C to observe the freezing and recovery of the samples. The results are shown in Table 3.

[0091] Table 3 Freeze-thaw resistance of Examples 1-4 and Comparative Examples 1-4

[0092]

[0093]

[0094] Through testing, the concentrated fluid compositions for hydraulic supports in Examples 1-4 of this invention exhibit excellent freeze-thaw resistance. They remain fluid even at relatively low temperatures and can recover quickly. During the recovery process, they are in a mixture of ice and water, not a viscous substance overall. Therefore, the thawed portion can be extracted and used during the recovery process. In contrast, the concentrated fluid compositions for hydraulic supports in Comparative Examples 1-2 use grease as a lubricant, thus requiring the use of an emulsifier (such as nonylphenol polyoxyethylene ether, which is currently prohibited). Furthermore, the recovery time of these compositions is longer, and they remain viscous during the recovery process, requiring complete recovery before use.

[0095] In summary, the hydraulic support concentrate composition of this invention, while incorporating a large amount of antifreeze, uses polyether as a lubricant, replacing commonly used greases that are prone to entanglement and formation of high-viscosity and viscoelastic micelles due to low temperatures. The product exhibits excellent freeze-thaw resistance and does not use emulsifiers prohibited by the list. The production process of this invention mixes organic alcohol amines with high freezing points and diols to form a first mixture. During production, the organic alcohol amines can be stored in the form of this first mixture during winter to prevent freezing and condensation, thereby improving production efficiency and reducing production losses.

[0096] Any numerical value mentioned in this invention, if there is only a two-unit interval between any minimum and any maximum value, includes all values ​​that increase by one unit each time from the minimum to the maximum value. For example, if the amount of a component, or the value of a process variable such as temperature, pressure, or time, is stated as 50-90, in this specification it means specifically listing values ​​such as 51-89, 52-88… and 69-71 and 70-71, etc. For non-integer values, it may be appropriately considered that a unit is 0.1, 0.01, 0.001, or 0.0001. These are merely some specifically specified examples. In this application, in a similar manner, all possible combinations of numerical values ​​between the listed minimum and maximum values ​​are considered to have been disclosed.

[0097] It should be noted that the embodiments described above are only for explaining the present invention and do not constitute any limitation on the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory terms, not limiting terms. Modifications can be made to the present invention within the scope of the claims, and revisions can be made to the present invention without departing from the scope and spirit of the present invention. Although the present invention described herein relates to specific methods, materials, and embodiments, it does not mean that the present invention is limited to the specific examples disclosed herein; on the contrary, the present invention can be extended to all other methods and applications with the same function.

Claims

1. A concentrated fluid composition for hydraulic supports, characterized in that, By weight, it comprises the following components: 0.5-2 parts by weight of inorganic alkali, 8-12 parts by weight of organic alcohol amine, 4-10 parts by weight of polyether, 7-12 parts by weight of diol, 0.2-0.8 parts by weight of tetrasodium ethylenediaminetetraacetate, 10-15 parts by weight of composite rust inhibitor, 0.05-0.5 parts by weight of benzotriazole, 0.01-0.1 parts by weight of defoamer, and 55-65 parts by weight of water.

2. The concentrated fluid composition for hydraulic supports according to claim 1, characterized in that, The concentrated liquid composition comprises the following components: Inorganic base 1.0-1.5 parts by weight, and / or, 9-11 parts by weight of organic alcohol amines, and / or, 6-8 parts by weight of polyether, and / or 8-10 parts by weight of diol, and / or, 0.3-0.7 parts by weight of tetrasodium ethylenediaminetetraacetate, and / or, 11.5-13 parts by weight of composite rust inhibitor, and / or, 0.3-0.5 parts by weight of benzotriazole, and / or, Defoamer 0.05-0.1 parts by weight.

3. The concentrated fluid composition for hydraulic supports according to claim 1 or 2, characterized in that, The inorganic base includes at least one of KOH and NaOH; and / or The organic alcohol amines include at least one of triisopropanolamine, triethanolamine, and monoethanolamine.

4. The concentrated fluid composition for hydraulic supports according to claims 1-3, characterized in that, The polyether includes at least one of dodecyl alcohol polyoxyethylene ether and allyl alcohol polyoxyalkyl ether.

5. The concentrated fluid composition for hydraulic supports according to any one of claims 1-4, characterized in that, The diol includes at least one of ethylene glycol, propylene glycol, and butanediol.

6. The concentrated fluid composition for hydraulic supports according to any one of claims 1-5, characterized in that, The composite rust inhibitor includes an organic salt rust inhibitor and an inorganic salt rust inhibitor; the mass ratio of the organic salt rust inhibitor to the inorganic salt rust inhibitor is (2-4):(9-11), preferably 3:

10.

7. The concentrated fluid composition for hydraulic supports according to claim 6, characterized in that, The organic salt rust inhibitor comprises a tricarboxylate, preferably, the tricarboxylate comprises at least one of 2,4,6-tris(aminohexanoyl)-1,3,5-triazine; and / or, The inorganic salt rust inhibitor includes at least one selected from sodium nitrite, carbonate, potassium dichromate, and sodium borate; and / or, The defoamer includes at least one of organosiloxane defoamers and polyether-modified siloxane defoamers.

8. A method for preparing the concentrated fluid composition for hydraulic supports according to any one of claims 1-7, characterized in that, The preparation method includes the following steps: heating and mixing organic alcohol amine, diol, inorganic alkali, polyether, tetrasodium ethylenediaminetetraacetate, composite rust inhibitor, benzotriazole, defoamer and water to obtain the product; Preferably, it includes the following steps: S1: Mix the diol and organic alcohol amine evenly to obtain the first mixture; S2: Heat and mix water, inorganic alkali, polyether, and the first mixture until homogeneous to obtain the second mixture; S3: Add ethylenediaminetetraacetic acid tetrasodium, composite rust inhibitor and benzotriazole to the second mixture obtained in step S2, heat and mix evenly to obtain the third mixture; S4: Cool the third mixture obtained in step S3, add defoamer, mix evenly, and obtain the concentrated liquid composition for hydraulic support.

9. The preparation method according to claim 8, characterized in that, In steps S2 and S3, the heating temperature is independently 50–60°C; and / or, the mixing method is independently stirring, with a stirring rate preferably 300–800 rpm; and / or, the stirring time is preferably 1–2 hours; and / or, In step S4, the temperature is lowered to room temperature, and the mixing method is stirring. The stirring rate is preferably 300-800 rpm, and / or the stirring time is preferably 20-60 min.

10. The application of the hydraulic support concentrate composition according to any one of claims 1-7 and the hydraulic support concentrate composition prepared by the preparation method according to claim 8 or 9 in the field of low-temperature hydraulic supports.

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