CN108678801B - Blocking type slurry material for preventing and treating coal spontaneous combustion fly ash alkali metal chelation hardening - Google Patents
Blocking type slurry material for preventing and treating coal spontaneous combustion fly ash alkali metal chelation hardening Download PDFInfo
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- CN108678801B CN108678801B CN201810513310.1A CN201810513310A CN108678801B CN 108678801 B CN108678801 B CN 108678801B CN 201810513310 A CN201810513310 A CN 201810513310A CN 108678801 B CN108678801 B CN 108678801B
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- 239000010881 fly ash Substances 0.000 title claims abstract description 104
- 239000002002 slurry Substances 0.000 title claims abstract description 62
- 229910052783 alkali metal Inorganic materials 0.000 title claims abstract description 57
- 150000001340 alkali metals Chemical class 0.000 title claims abstract description 57
- 239000003245 coal Substances 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 title claims abstract description 33
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 25
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 25
- 230000000903 blocking effect Effects 0.000 title claims abstract description 21
- 230000009920 chelation Effects 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000013522 chelant Substances 0.000 claims abstract description 23
- 239000000375 suspending agent Substances 0.000 claims abstract description 15
- 239000012190 activator Substances 0.000 claims abstract description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 8
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 8
- 235000010413 sodium alginate Nutrition 0.000 claims description 8
- 239000000661 sodium alginate Substances 0.000 claims description 8
- 229940005550 sodium alginate Drugs 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 239000000176 sodium gluconate Substances 0.000 claims description 8
- 229940005574 sodium gluconate Drugs 0.000 claims description 8
- 235000012207 sodium gluconate Nutrition 0.000 claims description 8
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 8
- 235000011152 sodium sulphate Nutrition 0.000 claims description 8
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 abstract description 11
- 238000004062 sedimentation Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000000725 suspension Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000011010 flushing procedure Methods 0.000 description 6
- 230000000740 bleeding effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 230000032798 delamination Effects 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 230000008719 thickening Effects 0.000 description 5
- 239000011268 mixed slurry Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/08—Rock dusting of mines; Depositing other protective substances
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a blocking type slurry material for preventing and treating coal spontaneous combustion fly ash alkali metal chelate hardening, which comprises the following components in parts by weight: 0.5-2 parts of fly ash alkali metal chelating suspending agent, 0.2-0.5 part of alkali metal chelating activator, 20-30 parts of fly ash and 68-78 parts of water. The invention belongs to the technical field of coal spontaneous combustion prevention and control of coal mine fire prevention and control, and discloses an alkali metal chelate hardening blocking type slurry material for coal spontaneous combustion fly ash, which can quickly and efficiently chelate alkali metal in fly ash by exciting alkali metal, block cementation, hardening and sedimentation of fly ash, suspend fly ash slurry in an overlong stable state, prevent a coal mine grouting pipeline from slagging and blocking a pipe, ensure continuous and efficient implementation of coal mine fly ash fire prevention and control technology, and simultaneously has the advantages of low cost, environmental protection and rich raw material sources.
Description
Technical Field
The invention belongs to the technical field of coal spontaneous combustion prevention and control of coal mine fire prevention and control, and particularly relates to an alkali metal chelate hardening blocking type slurry material for coal spontaneous combustion fly ash, which is used for preventing coal ash grouting pipe blockage by activating alkali metal in fly ash and then carrying out efficient and rapid chelation to block fly ash settlement and cement hardening.
Background
The fire hazard of the mine is serious, on one hand, high-temperature toxic and harmful gas is generated, and the life safety of underground personnel is seriously threatened; and gas and coal dust explosion can be induced, so that serious casualties are caused, the mining efficiency is limited, and the fire area is closed to bring about great economic loss. In recent years, the demand of fire prevention and extinguishing materials for mines has increased dramatically, and grouting fire prevention and extinguishing technology is used as daily fire prevention and extinguishing technology due to low cost, simplicity and rapidness. Many mines use fly ash slurries on a large scale while using yellow mud and cement mortar. On the one hand, the fly ash waste of the thermal power plant is solved nearby, the price is low, the accumulation and the transportation of the fly ash waste are prevented from generating a large amount of environmental pollution, on the other hand, the loess grouting and filling can be replaced, the loss of loess resources is effectively reduced, the use cost is greatly reduced, and therefore the yellow mud grouting is gradually replaced by the fly ash grouting. However, the fly ash slurry is a non-Newtonian fluid, when the fly ash slurry is used in the process of grouting, the flow velocity of different use places in the process of pipe flow is different, the viscosity and the carrying capacity of the slurry are changed, solid-phase particles are easy to attach to the pipe wall, and a single fly ash suspension slurry does not have good pipeline perfusability, so that pipeline sedimentation and pipe clogging are caused, the conveying capacity of a grouting pipeline is influenced, and the grouting effect is further influenced.
Therefore, coal mines face widely available fly ash, and the traditional thickening additive material and pouring process cannot solve the problem of sedimentation in fly ash pipeline transportation. At present, in order to prevent the blockage of a grouting pipeline, the pipeline is generally cleaned by using a clean water flushing mode after grouting, but the influence of the clean water flushing flow, the flushing time, the continuous flushing time and the like on the flushing effect is not clear, so that the pipeline cleaning work is time-consuming and labor-consuming, and the flushing effect cannot be guaranteed.
Disclosure of Invention
Aiming at solving the existing problems, the invention provides a fly ash alkali metal chelate hardening blocking type slurry material for preventing and treating spontaneous combustion of coal, aiming at solving the problem that a grouting pipeline is blocked due to easy sedimentation and slagging in the fly ash grouting process. The slurry material is low in cost and environment-friendly, and meanwhile, alkali metal in the fly ash is activated to carry out efficient and rapid chelation, the fly ash is prevented from settling and cementing and hardening, the fly ash slurry is suspended in an overlong stable state, a coal mine grouting pipeline is prevented from being slag-bonded and pipe-blocked, the continuous and efficient implementation of a coal mine fly ash fire prevention and extinguishing technology is guaranteed, the uniform coverage of the coal spontaneous combustion area by the fly ash slurry after underground pouring is realized, and the purpose of coal spontaneous combustion prevention and control is achieved.
The technical scheme adopted by the invention is as follows: the blocking type slurry material for preventing and treating the coal spontaneous combustion fly ash from alkali metal chelation hardening comprises the following components in parts by weight: 0.5-2 parts of fly ash alkali metal chelating suspending agent, 0.2-0.5 part of alkali metal chelating activator, 20-30 parts of fly ash and 68-78 parts of water; the fly ash alkali metal chelating suspending agent comprises the following components in parts by weight: 5-8 parts of high water absorption polyacrylamide, 40-50 parts of sodium lignosulfonate, 40-50 parts of sodium gluconate and 3-5 parts of sodium alginate; the alkali metal chelating excitant comprises the following components in parts by weight: 20-30 parts of sodium silicate, 30-40 parts of sodium sulfate and 30-40 parts of sodium carbonate;
further, the weight part ratio of the sodium gluconate to the sodium alginate in the fly ash alkali metal chelating suspending agent is 10: 1;
further, the weight part ratio of sodium sulfate to sodium carbonate in the alkali metal chelating excitant is 1: 1;
further, the preparation method of the alkali metal chelate hardening blocking type slurry material for preventing and treating coal spontaneous combustion fly ash comprises the following steps:
1) weighing the components according to the weight parts of the components;
2) fully mixing 20-30 parts by weight of fly ash and equal parts by weight of water to form fly ash slurry, adding 0.2-0.5 part by weight of alkali metal chelate activator of fly ash, and fully and uniformly stirring;
3) and (3) fully mixing the remaining 38-58 parts by weight of water and 0.5-2 parts by weight of fly ash alkali metal chelating suspending agent within 1min, adding the mixture into the fly ash slurry obtained in the step 2), fully stirring to form the slurry material, and filling the slurry material into a use area through a coal mine grouting pipeline for preventing coal spontaneous combustion.
By adopting the scheme, the invention has the following beneficial effects:
the process for preventing and treating the coal spontaneous combustion fly ash alkali metal chelate hardening blocking type slurry material and the using method are simple, and the slurry material has good suspension property and is not easy to activate and slag bonding in the grouting pipeline perfusion process of the coal mine. The used materials have low price and wide sources, and are green and environment-friendly.
The alkali metal chelate hardening blocking type slurry material for preventing coal spontaneous combustion fly ash disclosed by the invention is used for activating the alkali metal in the fly ash and then efficiently and quickly chelating the activated alkali metal, so that the combination of the alkali metal and active silicide and the like in the fly ash is blocked, the settling and cementation hardening of the fly ash are substantially blocked, the fly ash slurry is suspended in an ultralong stable state, and the slag-bonding pipe blockage of a coal mine grouting pipeline is prevented. The continuous and efficient implementation of the coal mine fly ash fire prevention and extinguishing technology is ensured.
Compared with the existing fly ash suspension slurry material, the blocking type slurry material for preventing and controlling the coal spontaneous combustion fly ash alkali metal chelation hardening has the following outstanding advantages:
(1) high steady state, no cementation. The invention prevents and treats the coal spontaneous combustion fly ash alkali metal chelate hardening blocking type slurry material, overcomes the problem of activated cementation of alkali metal and silicide in fly ash which cannot be solved by adding the traditional suspending agent into fly ash slurry, solves the problem of wall attachment, slagging and blockage in a pipe caused by cementation and sedimentation in the traditional fly ash grouting, avoids the problem of preventing and extinguishing fire and blocking the pipe in coal mine field by the fly ash grouting, and saves a large amount of cost.
(2) Ultra-long steady suspension. The invention relates to a blocking type slurry material for preventing and treating coal spontaneous combustion fly ash alkali metal chelate hardening, which is characterized in that on the basis of the traditional thickening dispersion suspension principle, the alkali metal in fly ash is introduced to activate the chelate suspension principle, the alkali metal in fly ash forms an integrated net-shaped combination state in the fly ash after being activated, the alkali metal is further chelated to form a chelate connection structure with an aqueous solution system, and finally, the alkali metal is activated by chelation to form a hyperstable suspension system by the fly ash and water. Compared with the traditional thickening dispersion suspension, the suspension state can overcome later-stage fly ash polymerization and sedimentation; compared with a newer chelating suspension system, the activation and re-chelation overcome the problem of dispersion, polymerization and settlement of partial components caused by the fact that a net-shaped integrated structure is not formed in the later-stage fly ash.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1, this example provides a blocking type slurry material for preventing and treating coal spontaneous combustion fly ash alkali metal chelate hardening, which is prepared by mixing 10g (20 parts by weight) of fly ash with 10ml (20 parts by weight) of water to form a fly ash slurry, adding 0.1g (0.2 parts by weight) of fly ash alkali metal chelate activator (including 0.02g of sodium silicate, 0.04g of sodium sulfate and 0.04g of sodium carbonate), and stirring to form a mixed slurry. Adding 0.1g (0.2 part by weight) of fly ash alkali metal chelating suspending agent (comprising 0.005g of high water absorption polyacrylamide, 0.04g of sodium lignosulfonate, 0.05g of sodium gluconate and 0.005g of sodium alginate) into 30ml (60 parts by weight) of water within 1min, fully mixing, adding into the prepared fly ash slurry, and fully stirring again to form the slurry material. The samples were observed for delamination, bleeding and viscosity change in the upper layer of the slurry, with the results detailed in table 1 below.
Example 2, this example provides a blocking type slurry material for preventing and treating coal spontaneous combustion fly ash alkali metal chelate hardening, which is prepared by mixing 10g (20 parts by weight) of fly ash with 10ml (20 parts by weight) of water to form a fly ash slurry, adding 0.1g (0.2 parts by weight) of fly ash alkali metal chelate activator (including 0.02g of sodium silicate, 0.04g of sodium sulfate and 0.04g of sodium carbonate), and stirring to form a mixed slurry. Adding 0.25g (0.5 part by weight) of fly ash alkali metal chelating suspending agent (comprising 0.02g of high water absorption polyacrylamide, 0.098g of sodium lignosulfonate, 0.12g of sodium gluconate and 0.012g of sodium alginate) into 30ml (60 parts by weight) of water within 1min, fully mixing, adding into the prepared fly ash slurry, and fully stirring again to form the slurry material. The samples were observed for delamination, bleeding and viscosity change in the upper layer of the slurry, with the results detailed in table 1 below.
Example 3, this example provides an alkali metal chelate hardening blocking type slurry material for fly ash to prevent spontaneous combustion of coal, which is prepared by mixing 10g (20 parts by weight) of fly ash with 10ml (20 parts by weight) of water to form a fly ash slurry, adding 0.1g (0.2 parts by weight) of alkali metal chelate activator for fly ash (including 0.02g of sodium silicate, 0.04g of sodium sulfate and 0.04g of sodium carbonate), and stirring to form a mixed slurry. Adding 0.4g (0.8 part by weight) of fly ash alkali metal chelating suspending agent (comprising 0.03g of high water absorption polyacrylamide, 0.15g of sodium lignosulfonate, 0.2g of sodium gluconate and 0.02g of sodium alginate) into 25ml (50 parts by weight) of water within 1min, fully mixing, adding into the prepared fly ash slurry, and fully stirring again to form the slurry material. The samples were observed for delamination, bleeding and viscosity change in the upper layer of the slurry, with the results detailed in table 1 below.
Example 4, in the fly ash alkali metal chelate hardening blocking type slurry material for preventing coal spontaneous combustion of this example, 10g (20 parts by weight) of fly ash and 10ml (20 parts by weight) of water are first mixed thoroughly to form a fly ash slurry, then 0.25g (0.5 parts by weight) of a fly ash alkali metal chelate activator (including 0.05g of sodium silicate, 0.1g of sodium sulfate and 0.1g of sodium carbonate) is added and stirred thoroughly to form a mixed slurry. Adding 0.4g (0.8 part by weight) of fly ash alkali metal chelating suspending agent (comprising 0.03g of high water absorption polyacrylamide, 0.15g of sodium lignosulfonate, 0.2g of sodium gluconate and 0.02g of sodium alginate) into 25ml (50 parts by weight) of water within 1min, fully mixing, adding into the prepared fly ash slurry, and fully stirring again to form the slurry material. The samples were observed for delamination, bleeding and viscosity change in the upper layer of the slurry, with the results detailed in table 1 below.
Comparative example: the comparative examples included three comparative examples: (1) comparative example 1, a fly ash slurry was formed with only 10g fly ash and 40g water being thoroughly stirred; (2) comparative example 2, adding fly ash slurry which is obtained from a coal mine site and is formed by 1 to 10g of fly ash and 40g of water in percentage by mass of the thickening dispersion suspending agent to form thickening dispersion fly ash suspension slurry; (3) and in the comparative example 3, the fly ash slurry formed by 1 to 10g of fly ash and 40g of water in percentage by mass of the structure chelating coated suspension powder taken from a coal mine site is added to form the fly ash structure chelating coated suspension slurry. The samples were observed for delamination, bleeding and viscosity change in the upper layer of the slurry, with the results detailed in table 1 below.
TABLE 1 different stopping agent inhibition treatments and characteristic oxidation parameters of raw coal
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (1)
1. The blocking type slurry material for preventing and treating the coal spontaneous combustion fly ash from alkali metal chelation hardening is characterized by comprising the following components in parts by weight: 0.5-2 parts of fly ash alkali metal chelating suspending agent, 0.2-0.5 part of alkali metal chelating activator, 20-30 parts of fly ash and 68-78 parts of water; the fly ash alkali metal chelating suspending agent comprises the following components in parts by weight: 5-8 parts of high water absorption polyacrylamide, 40-50 parts of sodium lignosulfonate, 40-50 parts of sodium gluconate and 3-5 parts of sodium alginate; the alkali metal chelating excitant comprises the following components in parts by weight: 20-30 parts of sodium silicate, 30-40 parts of sodium sulfate and 30-40 parts of sodium carbonate;
the weight part ratio of sodium gluconate to sodium alginate in the fly ash alkali metal chelating suspending agent is 10: 1;
the weight ratio of sodium sulfate to sodium carbonate in the alkali metal chelating excitant is 1: 1;
the preparation method of the alkali metal chelate hardening blocking type slurry material for preventing and treating coal spontaneous combustion fly ash comprises the following steps:
1) weighing the components according to the weight parts of the components;
2) fully mixing 20-30 parts by weight of fly ash and equal parts by weight of water to form fly ash slurry, adding 0.2-0.5 part by weight of alkali metal chelate activator of fly ash, and fully and uniformly stirring;
3) and (3) fully mixing the remaining 38-58 parts by weight of water and 0.5-2 parts by weight of fly ash alkali metal chelating suspending agent within 1min, adding the mixture into the fly ash slurry obtained in the step 2), fully stirring to form a slurry material, and filling the slurry material into a use area through a coal mine grouting pipeline for preventing coal spontaneous combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810513310.1A CN108678801B (en) | 2018-05-25 | 2018-05-25 | Blocking type slurry material for preventing and treating coal spontaneous combustion fly ash alkali metal chelation hardening |
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| CN201810513310.1A CN108678801B (en) | 2018-05-25 | 2018-05-25 | Blocking type slurry material for preventing and treating coal spontaneous combustion fly ash alkali metal chelation hardening |
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| CN108678801B true CN108678801B (en) | 2020-04-14 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556909A (en) * | 2015-01-13 | 2015-04-29 | 河海大学 | Fast-setting anti-corrosion cement using coal ash as raw material and preparation method thereof |
| CN107676122A (en) * | 2017-10-24 | 2018-02-09 | 内蒙古博冉科技有限责任公司 | Preventing and treating colliery uses suspension retardant and its application certainly |
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| CN101723641A (en) * | 2009-12-15 | 2010-06-09 | 中国矿业大学 | Fire-prevention and leaking-stoppage thickened pulverized fuel ash slurry of goaf and preparation method thereof |
| CN103387410B (en) * | 2013-07-17 | 2014-10-15 | 中国矿业大学 | Fly ash solidification foamed material for preventing coal spontaneous combustion and preparation method thereof |
| CN103964766B (en) * | 2014-04-29 | 2016-09-14 | 胡相明 | Flyash-cement foam material of preventing and treating spontaneous combustionof coal and preparation method thereof |
| KR101909587B1 (en) * | 2016-07-22 | 2018-10-18 | (주) 피플아이 | Cooling device for spontaneous combustion prevention |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556909A (en) * | 2015-01-13 | 2015-04-29 | 河海大学 | Fast-setting anti-corrosion cement using coal ash as raw material and preparation method thereof |
| CN107676122A (en) * | 2017-10-24 | 2018-02-09 | 内蒙古博冉科技有限责任公司 | Preventing and treating colliery uses suspension retardant and its application certainly |
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