High-water-quick-setting foaming material for fire prevention and extinguishment and preparation method of high-water-quick-setting foaming material

Abstract

The invention discloses a high-water-quick-setting foaming material for preventing and extinguishing fire and a preparation method thereof. The high-water-quick-setting foaming material comprises a component A, a component B and a component C, the component A consists of sulphoaluminate cement, phosphogypsum, an accelerator A, a retarder and a suspending agent in a mass ratio of 10: (2-4): 0.03: 0.05: 0.05; the component B is prepared from Portland cement, ardealite, an accelerator B, a retarder and a suspending agent in a mass ratio of 10: (1-3): 0.03: 0.05: 0.05; the component C is composed of a foaming agent and a foam stabilizer in a mass ratio of 1: 0.01; the component A, the component B and the component C are respectively mixed with water according to a water-cement ratio of (3-6): 1, and then are mutually mixed to prepare the high-water-quick-setting foaming material. The material not only has dual effects of fire prevention and fire extinguishment, but also has the advantages of high condensation speed, high consolidation capacity, good air leakage stoppage effect and capability of longitudinally stacking and inerting a target fire area, and the fire prevention and extinguishment effect of a mining area is ensured.

Description

Technical Field

[0001] The invention relates to a high-water quick-setting foaming material for fire prevention and extinguishing and a preparation method thereof, belonging to the technical field of coal mine fire prevention and extinguishing. Background Art

[0002] In coal mine production, fire is a serious safety problem, so fire prevention and extinguishing work is crucial. Traditional fire prevention and extinguishing methods include grouting fire prevention and extinguishing, which is simple to operate and low in cost, and is one of the commonly used methods in coal mines. With the development of technology, some new fire prevention and extinguishing materials and technologies have emerged. Such as cement-based fire extinguishing materials, polymer colloids, composite colloid materials, etc.

[0003] Mine fire prevention and extinguishing materials should have two major characteristics: fire prevention and fire extinguishing. However, the commonly used fire prevention and extinguishing materials often only have one of these capabilities. Although the existing cement-based materials have good plugging and consolidation effects, that is, good fire prevention performance, they have poor inertization effects and general cooling effects, that is, poor fire extinguishing effects; polymer materials have a faster setting time and good wrapping effects, that is, they have a certain fire extinguishing effect, but organic materials will release more heat during reaction, and they are not similar to rock wall materials, so they lack cooling and consolidation effects, that is, poor fire prevention effects; composite colloidal materials have good bonding ability, that is, they have certain fire prevention performance, but they have poor cooling effects and certain wrapping abilities, that is, general fire extinguishing performance.

[0004] To sum up, how to provide a high-water-speed setting foaming material for fire prevention and extinguishing and its preparation method, so that the material not only has the dual functions of fire prevention and fire extinguishing, but also has the advantages of fast setting speed, strong consolidation ability, good plugging effect, vertical stacking and inerting target fire area, is one of the research directions of this industry. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a high-water-speed setting foaming material for fire prevention and extinguishing and a preparation method thereof. The material not only has the dual functions of fire prevention and fire extinguishing, but also has the advantages of fast setting speed, strong consolidation ability, good effect of plugging air leakage, and the ability to stack vertically and inertate the target fire area, thereby ensuring the fire prevention and extinguishing effect on the mining area.

[0006] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a high-water rapid-setting foaming material for fire prevention and extinguishing, comprising components A, B, and C;

[0007] The component A is composed of sulphoaluminate cement, phosphogypsum, accelerator A, retarder and suspending agent in a mass ratio of 10:(2-4):0.03:0.05:0.05;

[0008] The B component is composed of a mixture of silicate cement, phosphogypsum, accelerator B, retarder and suspending agent, with a mass ratio of 10: (1-3): 0.03: 0.05: 0.05;

[0009] The C component is composed of a mixture of a foaming agent and a foam stabilizer, with a mass ratio of 1:0.01;

[0010] The components A and B are mixed with water at a water-cement ratio of (3-6):1 to form a mixed solution of the components A and B, and then the mixed solutions are mixed at a mass ratio of 1:(0.5-1) to form a high water-fast setting foaming material for filling fire protection;

[0011] Components A, B and C are mixed with water at a water-cement ratio of (3-6):1 to form a mixed liquid of components A, B and C, and then the mixed liquids are mixed at a mass ratio of 1:(0.5-1):(0.2-0.5) to prepare a high water-fast setting foaming material for fire extinguishing.

[0012] Furthermore, the quick-setting agent A is a mixture of one or two of lithium carbonate and lithium chloride, and the quick-setting agent B is a sulphoaluminate mineral, such as anhydrous calcium sulphoaluminate, calcium sulphoaluminate, etc., which is a mixture of one or more of them.

[0013] Furthermore, the retarder is a phosphate, and one or a combination of phosphates can be used, such as sodium dihydrogen phosphate.

[0014] Furthermore, the suspending agent is made of one or a mixture of hydroxypropyl methylcellulose and methylcellulose.

[0015] Furthermore, the pH value of the phosphogypsum is 1 to 3, and the fineness of the phosphogypsum particles is not less than 800 meshes.

[0016] Furthermore, the foaming agent is sodium bicarbonate.

[0017] Furthermore, the foam stabilizer is sodium dodecylbenzene sulfonate.

[0018] The preparation method of the high water-fast setting foaming material for fire prevention and extinguishing comprises the following specific steps:

[0019] (1) Screening the industrial waste phosphogypsum, removing the larger pieces of waste residue, selecting the phosphogypsum with a pH between 1 and 3 by water extraction, drying and grinding it to a size of more than 800 mesh, and setting it aside for later use;

[0020] (2) Preparation of component A: Grind sulphoaluminate cement to a size of 800 mesh or more, add sulphoaluminate cement, phosphogypsum, accelerator A, retarder and suspending agent into a dry mixer according to the ratio required for setting speed, set the speed to 1500 r / min, stir for 5 min, ensure uniform mixing, and set aside for later use after stirring;

[0021] (3) Preparation of component B: Grind silicate cement to a size of 800 mesh or more, add silicate cement, phosphogypsum, accelerator B, retarder and suspending agent into a dry mixer according to the ratio required for setting speed, set the speed to 1500 r / min, stir for 5 min, ensure uniform mixing, and set aside for later use after stirring;

[0022] (4) Preparation of component C: Add the foaming agent and the foam stabilizer into a dry mixer according to the ratio required for the foaming multiple, set the speed to 1000 r / min, stir for a certain time of 5 min, and set aside after mixing evenly;

[0023] (5) According to the expansion multiple requirements, components A, B, and C are stirred and mixed according to the appropriate water-cement ratio at a stirring rate of 1000 r / min and a stirring time of 3 min to form a mixed solution of components A, B, and C;

[0024] (6) The mixed solution of components A, B, and C formed in step (5) is mixed and stirred for a certain period of time to form a high water-soluble quick-setting foaming material for filling fire prevention; or the mixed solution of components A, B, and C is mixed and stirred for a certain period of time to form a high water-soluble quick-setting foaming material for fire extinguishing.

[0025] The present invention adopts multiple materials to cooperate and act with each other to form a high-water rapid-setting foaming material. In the present invention, the rapid setting agent A can improve the early setting time and strength of silicate cement, the rapid setting agent B can improve the early setting time and strength of sulphoaluminate cement, the suspending agent improves the suspension degree of the main material in water, and the retarder can reduce the cement hydration during the early stage of the reaction. The calcium sulfate in the phosphogypsum can improve the cement performance, promote the hydration of clinker minerals, and improve the early strength. The phosphate radical can react with sodium bicarbonate to produce carbon dioxide, which has an expansion effect on the material, and can expand to generate internal driving force to fill the entire space. The tiny particles form a dense skeleton of inorganic material hydration products, thereby producing a better covering effect and strong consolidation ability. At the same time, the generation of carbon dioxide can also reduce the oxygen content in the environment, and achieve the purpose of fire extinguishing. Under the joint action of the above materials, the material made by the present invention has the advantages of good plugging effect, strong consolidation ability, tight wrapping and covering, significant heat insulation and cooling, rapid setting and inerting of the target fire zone, which is described in detail as follows:

[0026] (1) The present invention has excellent fireproof performance. The main ingredient of the material is cement, which is an inorganic material. Reasonable proportioning can reduce the heat generated during the reaction process. Since it has good similarity and compatibility with the rock wall, the material has a good effect of plugging air leakage, strong consolidation ability, and a certain strength and durability, so that it can completely isolate the dangerous area.

[0027] (2) The present invention has excellent fire extinguishing performance. The present invention can expand up to 12 times, and the material fineness is above 800 mesh. After the material is injected into the crack, the material reaction and expansion generate internal driving force, so that the material infiltrates the rock wall, and the tiny particles form a dense inorganic material hydration product skeleton, thereby producing a good covering effect, strong consolidation ability and achieving foam stability; the water-cement ratio can be up to 6:1, so that the material can provide sufficient cold exchange in the early stage of reaction and absorb more heat; the material is gray as a whole, so it has the ability to block a certain amount of heat radiation, and the cement-based material itself has the ability to isolate heat conduction after solidification. These capabilities enable the present invention to produce excellent heat insulation and cooling effects, and cut off the continuous supply of the fire area, so as to achieve the purpose of rapid fire extinguishing in the early stage.

[0028] (3) The present invention can continuously produce fire prevention and extinguishing effects. Thorough fire extinguishing requires a certain amount of time to achieve. It is a dynamic process that requires systematic processing. The rapid fire extinguishing in the early stage, the excellent plugging effect of air leakage and the strong consolidation ability are to lay the foundation for thorough fire extinguishing in the later stage. The carbon dioxide gas generated in the reaction process of the present invention can not only expand the material, but also penetrate into the fire extinguishing area, continuously reduce the oxygen content in the fire extinguishing area, and at the same time maintain the stability of the foam, so as to achieve the purpose of stabilizing the foam and not collapsing the foam, thereby having excellent inertization performance, so as to achieve the purpose of continuous fire extinguishing and fire extinguishing without rekindling.

[0029] (4) The present invention improves the utilization rate of waste phosphogypsum and reduces its damage to the environment. The use of phosphogypsum can achieve multiple effects at one stroke. The calcium sulfate in it can promote the hydration process of cement, improve the performance of cement, promote the hydration of clinker minerals, and improve the early strength; the phosphate radical can react with sodium bicarbonate to produce carbon dioxide. The production of gas can make the material expand, and later it can also reduce the oxygen content in the environment, so as to achieve the purpose of completely extinguishing the fire.

[0030] (5) This material can be used for both fire extinguishing and filling. When component C is not added, when components A and B are used at a water-cement ratio of 3:1, they lose fluidity within 1 minute and the final setting strength can reach 43Mpa. At this time, they can be used for filling. The material can still solidify in about 5 minutes at a maximum water-cement ratio of 6:1, and has a certain strength. The heat generated by the reaction is very low. After adding component C, the carbon dioxide gas produced can make the material expand to 12 times, which can quickly expand to fill the entire space and isolate oxygen, greatly reducing the cost of fire extinguishing. When the fire extinguishing area on site is relatively fragmented, with many small cracks and serious air leakage, it is necessary to produce a consolidation effect between the fragments, which will help to form the fire extinguishing area into a whole and prevent subsequent air leakage. At this time, components A and B are used. The high fluidity of the material in the early stage can make the slurry flow to each area, making the entire area airtight and having a certain strength, completely preventing fires caused by air leakage; when the entire area is mainly composed of some larger cracks and has good integrity, components A, B, and C can be used at the same time. The strong impregnation ability enables the material to completely isolate the fire area, and it has the effect of expanding without collapsing bubbles, achieving a completely sealed effect, thereby having good continuous fire extinguishing efficiency and greatly reducing the cost of fire extinguishing.

[0031] (6) This material makes full use of the characteristics of sulphoaluminate cement and silicate cement. Sulphoaluminate cement has the characteristics of high early strength, fast setting time, good corrosion resistance, etc., and silicate cement has the characteristics of high late strength and good durability. This material makes full use of the characteristics of the two cement materials, forming the characteristics of fast early flow loss time and no bubble collapse in the late expansion, so that the material can completely fit the impregnated wall surface after expansion, fully isolate oxygen, and ultimately achieve the purpose of effective fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a flow chart of the preparation and use. DETAILED DESCRIPTION

[0033] The present invention will be further described below.

[0034] First, the industrial waste phosphogypsum is screened and large impurities are discarded. The phosphogypsum with a pH value of 1 to 3 is obtained by water extraction. The phosphogypsum is dried and ground to above 800 mesh. At the same time, sulphoaluminate cement and silicate cement are ground to above 800 mesh and set aside for use.

[0035] Embodiment 1: It comprises component A and component B, wherein component A comprises, in parts by mass, 50 parts of sulphoaluminate cement, 20 parts of phosphogypsum, 0.15 parts of accelerator A, 0.25 parts of suspending agent and 0.25 parts of retarder, accelerator A is lithium carbonate, accelerator B is anhydrous calcium sulphoaluminate, and suspending agent is hydroxypropyl methylcellulose; component B comprises, in parts by mass, 50 parts of silicate cement, 15 parts of phosphogypsum, 0.15 parts of accelerator B, 0.25 parts of suspending agent and 0.25 parts of retarder, accelerator A is lithium carbonate, accelerator B is anhydrous calcium sulphoaluminate, and suspending agent is hydroxypropyl methylcellulose.

[0036] The specific preparation steps are:

[0037] (1) Preparation of component A: Add sulphoaluminate cement, phosphogypsum, accelerator A, retarder and suspending agent according to the proportions of this embodiment to a dry mixer, set the speed to 1500 r / min, stir for 5 min to ensure uniform mixing, and set aside for standby use after stirring;

[0038] (2) Preparation of component B: Add silicate cement, phosphogypsum, accelerator B, retarder and suspending agent according to the proportion of this embodiment to a dry mixer, set the speed to 1500 r / min, stir for 5 min to ensure uniform mixing, and set aside for use after stirring;

[0039] When in use, add components A and B into water respectively and stir, with the water-cement ratio of each being 3:1, the stirring rate being 1000r / min, and the stirring time being 3min. Then the mixed liquids of components A and B are mixed with each other, and after mixing, stirred at a stirring rate of 1000r / min for 3min. The reaction process is observed and various tests are carried out. The specific data are shown in Table 1.

[0040] Example 2: The composition and preparation process of components A and B are the same as those of Example 1.

[0041] When in use, add components A and B into water respectively and stir, with the water-cement ratio of each being 6:1, the stirring rate being 1000r / min, and the stirring time being 3min. Then the mixed liquids of components A and B are mixed with each other, and after mixing, stirred at a stirring rate of 1000r / min for 3min. The reaction process is observed and various tests are carried out. The specific data are shown in Table 1.

[0042] Embodiment 3: It comprises component A, component B and component C, wherein the component A comprises, in parts by mass, 50 parts of sulphoaluminate cement, 20 parts of phosphogypsum, 0.15 parts of accelerator A, 0.25 parts of suspending agent and 0.25 parts of retarder, wherein accelerator A is lithium carbonate, accelerator B is anhydrous calcium sulphoaluminate, and suspending agent is hydroxypropyl methylcellulose; the component B comprises, in parts by mass, 50 parts of silicate cement, 15 parts of phosphogypsum, 0.15 parts of accelerator B, 0.25 parts of suspending agent and 0.25 parts of retarder, wherein accelerator A is lithium carbonate, accelerator B is anhydrous calcium sulphoaluminate, and suspending agent is hydroxypropyl methylcellulose; the component C comprises, in parts by mass, 25 parts of sodium bicarbonate and 0.25 parts of surfactant.

[0043] The specific preparation steps are:

[0044] (1) Preparation of component A: Add sulphoaluminate cement, phosphogypsum, accelerator A, retarder and suspending agent according to the proportions of this embodiment to a dry mixer, set the speed to 1500 r / min, stir for 5 min to ensure uniform mixing, and set aside for standby use after stirring;

[0045] (2) Preparation of component B: Add silicate cement, phosphogypsum, accelerator B, retarder and suspending agent according to the proportion of this embodiment to a dry mixer, set the speed to 1500 r / min, stir for 5 min to ensure uniform mixing, and set aside for use after stirring;

[0046] (3) Preparation of component C: Add the foaming agent and foam stabilizer according to the ratio of this example into a dry mixer, set the speed to 1000 r / min, stir for 3 min, mix well and set aside for later use;

[0047] When in use, add components A, B, and C into water respectively and stir, with their respective water-cement ratios being 3:1, the stirring rate being 1000 r / min, and the stirring time being 3 min. Then, the mixed liquids of components A, B, and C are mixed with each other, and after mixing, stirred at a stirring rate of 1000 r / min for 3 min. The reaction process is observed and various tests are performed. The specific data are shown in Table 1.

[0048] Example 4: The composition and preparation process of components A, B and C are exactly the same as those of Example 3.

[0049] When in use, add components A, B, and C into water respectively and stir, with their respective water-cement ratios being 6:1, the stirring rate being 1000 r / min, and the stirring time being 3 min. Then, the mixed liquids of components A, B, and C are mixed with each other, and after mixing, stirred at a stirring rate of 1000 r / min for 3 min. The reaction process is observed and various tests are performed. The specific data are shown in Table 1.

[0050] Table 1 Test data of each embodiment

[0051]

[0052] According to Table 1, by comparing Example 1 with Example 2, it can be seen that, when other conditions are the same, changing the water-cement ratio will prolong the time of losing fluidity, reduce the strength of the material, and reduce the heat generated by the reaction. From Example 3 and Example 4, it can be seen that by comparing Example 1 with Example 2, adding component C can effectively increase the expansion multiple of the material, reduce the time of losing fluidity, reduce the heat generated by the reaction, reduce the viscosity of the slurry, and have better fluidity. When this material only uses components A and B, it can act as a filling material, the final setting strength can reach up to 43MPa, the time of losing fluidity is only 45s, and the water-cement ratio can reach up to 6:1. Although there is 8mL of water bleeding, it can still lose fluidity at 145s; when the three components are used at the same time, it can act as a fire-fighting material. Component C has an expansion effect on the material, reduces the amount of water bleeding, and the material expansion multiple can reach up to 12 times. At the same time, it can also reduce the time of losing fluidity and improve the fluidity of the slurry. The heat generated during the entire reaction process is low, and the cost of fire prevention and extinguishing can be greatly reduced while ensuring the fire extinguishing effect.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high water quick-setting foaming material for fire prevention and extinguishing, characterized in that: It includes components A, B and C; The component A is composed of sulphoaluminate cement, phosphogypsum, accelerator A, retarder and suspending agent in a mass ratio of 10:(2-4):0.03:0.05:0.05; The B component is composed of a mixture of silicate cement, phosphogypsum, accelerator B, retarder and suspending agent, with a mass ratio of 10: (1-3): 0.03: 0.05: 0.05; The C component is composed of a mixture of a foaming agent and a foam stabilizer, with a mass ratio of 1:0.01; The components A and B are mixed with water at a water-cement ratio of (3-6):1 to form a mixed solution of the components A and B, and then the mixed solutions are mixed at a mass ratio of 1:(0.5-1) to form a high water-fast setting foaming material for filling fire protection; Components A, B and C are mixed with water at a water-cement ratio of (3-6):1 to form a mixed liquid of components A, B and C, and then the mixed liquids are mixed at a mass ratio of 1:(0.5-1):(0.2-0.5) to prepare a high water-fast setting foaming material for fire extinguishing.

2. The high water-fast setting foam material for fire prevention and extinguishing according to claim 1, characterized in that: The accelerating setting agent A is made of one or a mixture of lithium carbonate and lithium chloride, and the accelerating setting agent B is a sulphoaluminate mineral.

3. The high water-fast setting foam material for fire prevention and extinguishing according to claim 1, characterized in that: The retarder is phosphate.

4. The high water-fast setting foam material for fire prevention and extinguishing according to claim 1, characterized in that: The suspending agent is made of one of hydroxypropyl methylcellulose and methylcellulose or a mixture of the two.

5. The high water-fast setting foam material for fire prevention and extinguishing according to claim 1, characterized in that: The pH value of the phosphogypsum is 1-3, and the fineness of the phosphogypsum particles is not less than 800 meshes.

6. The high water-fast setting foam material for fire prevention and extinguishing according to claim 1, characterized in that: The foaming agent is sodium bicarbonate.

7. The high water-fast setting foam material for fire prevention and extinguishing according to claim 1, characterized in that: The foam stabilizer is sodium dodecylbenzene sulfonate.

8. A method for preparing the high water-fast setting foaming material for fire prevention and extinguishing according to any one of claims 1 to 7, characterized in that: The specific steps are: (1) Screening the industrial waste phosphogypsum, removing the larger pieces of waste residue, selecting the phosphogypsum with a pH between 1 and 3 by water extraction, drying and grinding it to a size of more than 800 mesh, and setting it aside for later use; (2) preparing component A: grinding sulphoaluminate cement to a size of 800 mesh or more, adding sulphoaluminate cement, phosphogypsum, accelerator A, retarder and suspending agent to a dry mixer according to the ratio required for setting speed, stirring for a certain period of time to ensure uniform mixing, and setting aside for later use after stirring; (3) Preparation of component B: Grind silicate cement to a size of 800 mesh or more, add silicate cement, phosphogypsum, accelerator B, retarder and suspending agent into a dry mixer according to the required setting speed and stir for a certain period of time to ensure uniform mixing. After stirring, set aside for use; (4) Preparation of component C: Add the foaming agent and the foam stabilizer into a dry mixer according to the ratio required for the foaming multiple, set the speed to 1000 r / min, stir for a certain time of 5 min, and set aside after mixing evenly; (5) According to the expansion multiple requirement, components A, B, and C are stirred and mixed for a certain period of time according to an appropriate water-cement ratio to form a mixed solution of components A, B, and C; (6) The mixed solution of components A, B, and C formed in step (5) is mixed and stirred for a certain period of time to form a high water-soluble quick-setting foaming material for filling fire prevention; or the mixed solution of components A, B, and C is mixed and stirred for a certain period of time to form a high water-soluble quick-setting foaming material for fire extinguishing.

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