CN110157379A - A kind of fire-retardant dust suppressant of soft film type coal and preparation method thereof - Google Patents
A kind of fire-retardant dust suppressant of soft film type coal and preparation method thereof Download PDFInfo
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- CN110157379A CN110157379A CN201910544118.3A CN201910544118A CN110157379A CN 110157379 A CN110157379 A CN 110157379A CN 201910544118 A CN201910544118 A CN 201910544118A CN 110157379 A CN110157379 A CN 110157379A
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Abstract
The invention discloses a kind of fire-retardant dust suppressants of soft film type coal and preparation method thereof, and in terms of mass fraction, raw material includes following components: 1.0-3.0 parts of modifying agent, 8.0-9.0 parts of butyl acrylates, 1.5-1.7 parts of function monomers, 0.5-0.8 parts of flame-retardant monomers, 0.01-0.5 portions of phase transfer catalysts, 28.0-45.0 parts of polymerization main monomers, 2-3.5 parts of emulsifiers, 0.3-0.6 parts of initiators, 1.0-2.0 parts of pH buffers, 60.0-110.0 part deionized water, 1.0-3.0 parts of fire retardants.This fire-retardant dust suppressant sprinkling can be formed later in surface of material within a short period of time has good mechanical stability, flexible fine and close macromolecule mantle, and formed film should not rupture, and has stronger resisting wind erosion and swinging property of antidetonation.Due to joined two kinds of nitrogen, phosphorus elements in this fire-retardant dust suppressant system, this macromolecule mantle forms nitrogen-phosphorus cooperative flame retardant system, has excellent flame retardant property, while can prevent contact of the air with coal, to play the role of preventing coal spontaneous combustion.
Description
Technical field
The present invention relates to fire-retardant dust suppressant technical field, in particular to the fire-retardant dust suppressant of a kind of soft film type coal and its preparation
Method.
Background technique
Coal can generate coal dust in exploitation, if Dust Concentration reaches its lower explosion limit (for 114mg/m3) when, once it meets
It may explode to open fire, seriously threaten safety of coal mines.The coal that coal field of opencast mining and mine laneway work surface generate
Dirt, can make cutter suffer from a variety of diseases such as pneumoconiosis, cause high risks to the body of cutter.Simultaneously as
Coal of the coal in storage in dump is contacted with air, it may occur that oxidation reaction, and release heat.After the temperature of coal increases, again
Accelerate the oxidation reaction speed of coal.In this way, just make the temperature of dump higher and higher, it, will when temperature is more than its self-ignition point
Spontaneous combustion causes Coal Loss and unsafe accident.
Coal is generally used open-top car transport in railway transportation.Currently as railway transportation technology continues to develop, train
The speed of service persistently rises, and the speed of meeting is also constantly accelerated, especially when train enters the tunnel for having certain length, due to
The effect of " Piston Action Wind " will form moment powerful rough air, thus leads to coal coal dust, is scattered and problem of environmental pollution is prominent
Out.The problem has been the huge security risk of railway transportation, and serious pollution also results in the huge wave of coal resources along thread environment
Take.In existing fire-retardant dust suppression Prevention Technique, for high molecular fire retardant dust suppressant due to good with caking property, it is excellent that moisture retention is good etc.
Point, use are more and more extensive.But high molecular fire retardant dust suppressant currently on the market is mostly " hard-shell type ", cured layer after product sprinkling
It is more crisp, transported in concussion and wind-force after it is easy to break, to lose anti-dust effect, and its higher cost.
Summary of the invention
The purpose of the present invention is to provide a kind of fire-retardant dust suppressants of soft film type coal and preparation method thereof, form a film flexible,
And have both fire-retardant and two kinds of performances of dust suppression simultaneously.
The present invention is to be achieved through the following technical solutions:
A kind of fire-retardant dust suppressant of soft film type coal, in terms of mass fraction, raw material includes following components:
1.0-3.0 parts of modifying agent, 8.0-9.0 parts of butyl acrylates, 1.5-1.7 parts of function monomers, 0.5-0.8 parts of fire-retardant lists
Body, 0.01-0.5 portions of phase transfer catalysts, 28.0-45.0 parts of polymerization main monomers, 2-3.5 parts of emulsifiers, 0.3-0.6 parts of initiations
Agent, 1.0-2.0 parts of pH buffers, 60.0-110.0 parts of deionized waters, 1.0-3.0 parts of fire retardants.
Further, modifying agent is at least one of epoxy resin E-44 and epoxy resin E-51.
Further, flame-retardant monomer is phytic acid.
Further, function monomer is at least one of methacrylic acid and methyl methacrylate.
Further, phase transfer catalyst is in benzyltriethylammoinium chloride, tetrabutylammonium bromide and tetrabutylammonium chloride
It is at least one.
Further, it polymerize main monomer for butyl acrylate and styrene, the mass ratio of butyl acrylate and styrene is
3.75:1。
Further, emulsifier is lauryl sodium sulfate and polyoxethylene octylphenyl phenol ether -10 or alkyl phenol ether sulfo group amber
Amber sodium salt and polyoxethylene octylphenyl phenol ether -10.
Further, initiator is ammonium persulfate and sodium hydrogensulfite or potassium peroxydisulfate and sodium hydrogensulfite.
Further, pH buffer is at least one of sodium bicarbonate and dibastic sodium phosphate；
Fire retardant is at least one of ammonium polyphosphate and melamine phosphate.
The invention also discloses a kind of preparation methods of fire-retardant dust suppressant of soft film type coal, comprising the following steps:
(1) by 1.0-3.0 parts of modifying agent, 8.0-9.0 parts of butyl acrylates, 1.0-1.1 parts of function monomers, 0.5-0.8 parts
Flame-retardant monomer and 0.01-0.5 parts of phase transfer catalyst mixing, insulation reaction 2-3h under the conditions of 100-120 DEG C are made intermediate
Body；
(2) by 0.50-0.60 parts of function monomers, 9.0-10.0 parts of polymerization main monomers, 1.5-2.5 parts of emulsifiers, 0.1-0.2
Part initiator, 0.5-1.0 parts of pH buffers and 20.0-40.0 parts of deionized waters are uniformly mixed, then anti-under the conditions of 75-85 DEG C
20-30min is answered, seed emulsion is made；
0.5-1.0pH parts of buffers, 30.0-50.0 parts of deionized waters and 0.2-0.4 parts of initiators are mixed, are caused
Agent solution；
(3) into intermediate, 19.0-35.0 parts of polymerization main monomers of addition, 0.5-1.0 parts of emulsifiers and 10.0-20.0 parts are gone
Ionized water obtains pre-emulsion after stirring 20-30min；
(4) pre-emulsion and initiator solution is added dropwise simultaneously into seed emulsion, is added dropwise in 3-4h, in 75-85
1.5-2.5h is reacted under the conditions of DEG C, obtains mixed system；
(5) mixed system is cooled to 40-50 DEG C, 1.0-3.0 parts of fire retardants is added and stir evenly, are mixed after cooling
Lotion, the i.e. fire-retardant dust suppressant of soft film type coal.
Compared with prior art, the invention has the following beneficial technical effects:
The fire-retardant dust suppressant of soft film type coal disclosed by the invention, including various ingredients, used modifying agent, fire-retardant list
Body, fire retardant are key component, assign the good fire-retardant dust suppression performance of the fire-retardant dust suppressant of soft film type coal.It can be coagulated rapidly when sprinkling
And it polymerize pulverized coal particle, especially enhancing water plays the role of depositing dust to the capture ability of the organic materials dust such as coal, can effectively prevent
Control coal fugitive dust.Can be formed within a short period of time in surface of material after sprinkling has good mechanical stability and flexible
Fine and close macromolecule mantle.Formed film should not rupture, and have stronger resisting wind erosion and swinging property of antidetonation.Due to this fire-retardant dust suppressant
It joined two kinds of nitrogen, phosphorus elements in system, therefore this macromolecule mantle forms nitrogen-phosphorus cooperative flame retardant system, have excellent
Flame retardant property, while contact of the air with coal can be prevented, to play the role of preventing coal spontaneous combustion.It can be in the transport of coal
With efficiently reduce dust pollution and dieseling in stacking process, reduce economic loss and environmental pollution, there is biggish warp
Benefit of helping and social benefit.
Further, it polymerize main monomer for butyl acrylate and styrene, the mass ratio of butyl acrylate and styrene is
3.75:1, it has been investigated that pliability is suitable after the fire-retardant dust suppressant emulsion film forming that this ratio is worked it out.
The preparation method of the fire-retardant dust suppressant of soft film type coal disclosed by the invention is pre-emulsification seed emulsion polymerization, first
Intermediate is made with modifying agent, butyl acrylate, function monomer, flame-retardant monomer and phase transfer catalyst, because of step used time thus
Longest, thus it is advanced, overall planning is carried out in time, can save the preparation time of entire material；Using intermediate as base
Pre-emulsion is made in plinth again, it is also necessary to seed emulsion and initiator solution be made, pre- cream is finally added dropwise simultaneously into seed emulsion
Change liquid and initiator solution three mixing, it is necessary to be added dropwise simultaneously, mixing pre-emulsion and initiator solution in advance can react and lose
Effect；It is eventually adding fire retardant and final product is made.
Detailed description of the invention
Fig. 1 is the infrared figure of fire-retardant dust suppressant of the invention；
Fig. 2 is fire-retardant dust suppressant emulsion particle diameter distribution map；
Fig. 3 is the SEM figure of the coal dust after spray water；
Fig. 4 is the SEM figure of the coal dust after the fire-retardant dust suppressant of sprinkling；
Fig. 5 is the transmission electron microscope picture of emulsion particle, wherein figure (a) is the micelle observed under the enlargement ratio of 40000x
Microgram, figure (b) is the micelle microgram observed under the enlargement ratio of 200000x.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
The fire-retardant dust suppressant of soft film type coal of the invention, in terms of mass fraction, raw material includes following components: 1.0-3.0
Part modifying agent, 8.0-9.0 parts of butyl acrylates, 1.5-1.7 parts of function monomers, 0.5-0.8 parts of flame-retardant monomers, 0.01-0.5 parts of phases
Transfer catalyst, 28.0-45.0 parts of polymerization main monomers, 2-3.5 parts of emulsifiers, 0.3-0.6 parts of initiators, 1.0-2.0 parts of pH are slow
Electuary, 60.0-110.0 parts of deionized waters, 1.0-3.0 parts of fire retardants.
Modifying agent is at least one of epoxy resin E-44 and epoxy resin E-51.
Flame-retardant monomer is phytic acid.
Function monomer is at least one of methacrylic acid and methyl methacrylate.
Phase transfer catalyst is benzyltriethylammoinium chloride (TEBA), tetrabutylammonium bromide (TBAB) and tetrabutylammonium chloride
At least one of.
It polymerize main monomer for butyl acrylate and styrene, the mass ratio of butyl acrylate and styrene is 3.75:1.
Emulsifier is lauryl sodium sulfate and polyoxethylene octylphenyl phenol ether -10, alkyl phenol ether sulfosuccinate sodium
Two kinds of salt and polyoxethylene octylphenyl phenol ether -10 one of combine.
Initiator is that ammonium persulfate and sodium hydrogensulfite, potassium peroxydisulfate one of are combined with two kinds of sodium hydrogensulfite.
PH buffer is at least one of sodium bicarbonate and dibastic sodium phosphate.
Fire retardant is at least one of ammonium polyphosphate and melamine phosphate.
Embodiment 1
A kind of preparation method of the fire-retardant dust suppressant of soft film type coal, comprising the following steps:
(1) by 3.0g epoxy resin (E51), 8.0g butyl acrylate, 1.0g methacrylic acid, 0.60g phytic acid and
0.010g tetrabutylammonium bromide is added in flask, reacts 3h under the conditions of 120 DEG C of oil baths, and intermediate is made, and takes out spare.
(2) by 0.60g methacrylic acid, 7.5g butyl acrylate, 2.0g styrene, 1.0g alkyl phenol ether sulfosuccinic acid
Ester sodium salt, 0.70g polyoxethylene octylphenyl phenol ether -10,0.11g potassium peroxydisulfate, 0.064g sodium hydrogensulfite, 0.85g bicarbonate
Sodium, 20g deionized water are added in reactor, react 30min under 80 DEG C of water bath conditions, and seed emulsion is made；
0.85g sodium bicarbonate, 38g deionized water, 0.05g potassium peroxydisulfate and 0.032g sodium hydrogensulfite are prepared into initiator
Solution.
(3) added into intermediate 15g butyl acrylate, 4g styrene, 0.5g alkyl phenol ether sulfosuccinic acid ester sodium salt,
0.35g polyoxethylene octylphenyl phenol ether -10 and 10g deionized water obtain pre-emulsion after high-speed stirred 30min.
(4) pre-emulsion and initiator solution is added dropwise simultaneously into seed emulsion, is added dropwise in 4h, it is anti-in 75 DEG C of heat preservations
1.5h is answered, mixed system is obtained.
(5) mixed system is cooled to 45 DEG C, 1.5g ammonium polyphosphate is added and stirs evenly, mixing cream is obtained after cooling
Liquid, the i.e. fire-retardant dust suppressant of soft film type coal.
Embodiment 2
A kind of preparation method of the fire-retardant dust suppressant of soft film type coal, comprising the following steps:
(1) by 2.5g epoxy resin (E44), 9.0g butyl acrylate, 1.0g methyl methacrylate, 0.80g phytic acid and
0.030g tetrabutylammonium chloride is added in flask, reacts 2.5h under the conditions of 115 DEG C of oil baths, and intermediate is made, and takes out spare.
(2) by 0.50g methacrylic acid, 7.5g butyl acrylate, 2.0g styrene, 1.5g lauryl sodium sulfate,
0.90g polyoxethylene octylphenyl phenol ether -10,0.11g potassium peroxydisulfate, 0.064g sodium hydrogensulfite, 0.60g sodium bicarbonate and 25g
Deionized water is added in reactor, reacts 25min under 80 DEG C of water bath conditions, and seed emulsion is made.
0.60g sodium bicarbonate, 45g deionized water, 0.05g potassium peroxydisulfate and 0.032g sodium hydrogensulfite are configured to cause
Agent solution.
(3) 15g butyl acrylate is added into intermediate, 4g styrene, 0.65g lauryl sodium sulfate, 0.35g is added
Polyoxethylene octylphenyl phenol ether -10 and 20g deionized water obtain pre-emulsion after high-speed stirred 30min.
(4) pre-emulsion and initiator solution is added dropwise simultaneously into seed emulsion, is added dropwise in 3.5h, kept the temperature at 80 DEG C
1.5h is reacted, mixed system is obtained.
(5) mixed system is cooled to 45 DEG C, 2g melamine phosphate is added and stirs evenly, mixing cream is obtained after cooling
Liquid, the i.e. fire-retardant dust suppressant of soft film type coal.
Embodiment 3
A kind of preparation method of the fire-retardant dust suppressant of soft film type coal, comprising the following steps:
(1) by 1.5g epoxy resin (E51), 8.0g butyl acrylate, 0.5g methacrylic acid, 0.5g methyl methacrylate
Ester, 0.60g phytic acid and 0.020g benzyltriethylammoinium chloride are added in flask, react 2.5h under the conditions of 120 DEG C of oil baths, are made
Intermediate takes out spare.
(2) by 0.60g methacrylic acid, 7.5g butyl acrylate, 2.0g styrene, 1.0g alkyl phenol ether sulfosuccinic acid
Ester sodium salt, 0.70g polyoxethylene octylphenyl phenol ether -10,0.11g ammonium persulfate, 0.064g sodium hydrogensulfite, 0.80g phosphoric acid hydrogen
Sodium and the mixing of 40g deionized water, then 30min is reacted under 85 DEG C of water bath conditions, seed emulsion is made.
0.80g dibastic sodium phosphate, 40g deionized water, 0.05g ammonium persulfate and 0.032g sodium hydrogensulfite are configured to draw
Send out agent solution.
(3) added into intermediate 15g butyl acrylate, 4g styrene, 0.5g alkyl phenol ether sulfosuccinic acid ester sodium salt,
0.35g polyoxethylene octylphenyl phenol ether -10 and 15g deionized water obtain pre-emulsion after high-speed stirred 30min.
(4) pre-emulsion and initiator solution is added dropwise simultaneously into seed emulsion, is added dropwise in 4h, it is anti-in 85 DEG C of heat preservations
1.5h is answered, mixed system is obtained.
(5) mixed system is cooled to 45 DEG C, 1.5g ammonium polyphosphate is added and stirs evenly, mixing cream is obtained after cooling
Liquid, the i.e. fire-retardant dust suppressant of soft film type coal.
Embodiment 4
A kind of preparation method of the fire-retardant dust suppressant of soft film type coal, comprising the following steps:
(1) by 3.0g epoxy resin (E51), 8.0g butyl acrylate, 1.0g methacrylic acid, 0.60g phytic acid, 0.010g
Tetrabutylammonium bromide and 0.30g tetrabutylammonium chloride are added in flask, react 3h under the conditions of 100 DEG C of oil baths, and intermediate is made,
It takes out spare.
(2) by 0.60g methacrylic acid, 7.5g butyl acrylate, 2.0g styrene, 1.0g alkyl phenol ether sulfosuccinic acid
Ester sodium salt, 0.70g polyoxethylene octylphenyl phenol ether -10,0.11g potassium peroxydisulfate, 0.064g sodium hydrogensulfite, 0.85g bicarbonate
Sodium, 40g deionized water are added in reactor, react 20min under 75 DEG C of water bath conditions, and seed emulsion is made；
0.85g sodium bicarbonate, 38g deionized water, 0.05g potassium peroxydisulfate and 0.032g sodium hydrogensulfite are prepared into initiator
Solution.
(3) 26.25g butyl acrylate, 7g styrene, 0.5g alkyl phenol ether sulfosuccinate sodium are added into intermediate
Salt, 0.35g polyoxethylene octylphenyl phenol ether -10 and 10g deionized water obtain pre-emulsion after high-speed stirred 30min.
(4) pre-emulsion and initiator solution is added dropwise simultaneously into seed emulsion, is added dropwise in 4h, it is anti-in 75 DEG C of heat preservations
1.5h is answered, mixed system is obtained.
(5) mixed system is cooled to 45 DEG C, 1.5g ammonium polyphosphate is added and 1.5g ammonium polyphosphate stirs evenly, it is cold
But mixed emulsion, the i.e. fire-retardant dust suppressant of soft film type coal are obtained afterwards.
Embodiment 5
A kind of preparation method of the fire-retardant dust suppressant of soft film type coal, comprising the following steps:
(1) by 3.0g epoxy resin (E51), 8.0g butyl acrylate, 1.0g methacrylic acid, 0.60g phytic acid, 0.1g tetra-
Butylammonium bromide, 0.30g tetrabutylammonium chloride and 0.10g benzyltriethylammoinium chloride are added in flask, in 100 DEG C of oil bath conditions
Intermediate is made in lower reaction 3h, takes out spare.
(2) by 0.60g methacrylic acid, 7.5g butyl acrylate, 2.0g styrene, 1.0g alkyl phenol ether sulfosuccinic acid
Ester sodium salt, 0.70g polyoxethylene octylphenyl phenol ether -10,0.11g potassium peroxydisulfate, 0.064g sodium hydrogensulfite, 0.85g bicarbonate
Sodium, 40g deionized water are added in reactor, react 20min under 75 DEG C of water bath conditions, and seed emulsion is made；
0.85g sodium bicarbonate, 38g deionized water, 0.05g potassium peroxydisulfate and 0.032g sodium hydrogensulfite are prepared into initiator
Solution.
(3) 26.25g butyl acrylate, 7g styrene, 0.5g alkyl phenol ether sulfosuccinate sodium are added into intermediate
Salt, 0.35g polyoxethylene octylphenyl phenol ether -10 and 10g deionized water obtain pre-emulsion after high-speed stirred 30min.
(4) pre-emulsion and initiator solution is added dropwise simultaneously into seed emulsion, is added dropwise in 4h, it is anti-in 75 DEG C of heat preservations
1.5h is answered, mixed system is obtained.
(5) mixed system is cooled to 45 DEG C, 1.5g ammonium polyphosphate is added and 1.5g ammonium polyphosphate stirs evenly, it is cold
But mixed emulsion, the i.e. fire-retardant dust suppressant of soft film type coal are obtained afterwards.
The sample of Example 1~5, infared spectrum analysis, obtains curve as shown in Figure 1,2955cm in infrared curve-1
With 2873cm-1For-CH3Stretching vibration absworption peak, 1728cm-1、1111cm-1、1064cm-1It is inhaled for the feature of butyl acrylate
Receive bands of a spectrum, 1606cm-1For the vibration absorption peak of phenyl ring skeleton, 1453cm-1、945cm-1、835cm-1For the characteristic absorption of epoxy group
Bands of a spectrum, 697cm-1Replace absorption peak for the monocycle of styrene, illustrates that graft copolymerization occurs for modifying agent and each monomer.1287cm-1Place
For the stretching vibration absworption peak of P=O, 1563cm-1N-H flexural vibrations peak in appearance is the characteristic absorption peak of fire retardant,
1029cm-1Occur flame-retardant monomer P-O-P stretching vibration absworption peak, it was demonstrated that occur in emulsion system flame-retardant monomer with it is fire-retardant
Agent.
The sample of Example 1~5 obtains distribution map as shown in Figure 2 through granularmetric analysis, and lotion average grain diameter is
141.3nm, PDI index 0.007 illustrates that emulsion particle diameter distribution is very narrow.Fire-retardant dust suppressant good emulsion stability.
Water is sprayed on coal dust surface, under electron-microscope scanning, as shown in Figure 3；The sample of Example 1~5, is sprayed
It is spread across on coal dust surface, under electron-microscope scanning, as shown in figure 4, being covered after can significantly observing fire-retardant dust suppressant drying and forming-film
It covers on coal dust surface, different size of pulverized coal particle is closely bonded together, this tunic can reduce connecing for coal dust and oxygen
Touching, reduces the risk of its spontaneous combustion.The pulverized coal particle of bonding is formed with the bonding course of certain toughness simultaneously, plays good dust suppression
Effect.
This fire-retardant dust suppressant is sprayed at coal surface, extremely strong to the coalescence polymerizing power of pulverized coal particle, especially enhancing water
To the capture ability of the organic materials dust such as coal, there is good mechanical stability and operability in surface of material, and have good
Good flexibility.
Can be formed within a short period of time in surface of material after sprinkling has good mechanical stability, flexible densification
Macromolecule mantle, formed film should not rupture, and have stronger resisting wind erosion and swinging property of antidetonation.Due to this fire-retardant dust suppressant system
In joined two kinds of nitrogen, phosphorus elements, therefore this macromolecule mantle forms nitrogen-phosphorus cooperative flame retardant system, has excellent resistance
Fire performance.Contact of the air with coal can be prevented simultaneously, to play the role of preventing coal spontaneous combustion.It can transport in coal and heap
Dust pollution and dieseling are efficiently reduced during putting, reduces economic loss and environmental pollution, and there is biggish economic effect
Benefit and social benefit.
Fig. 5 is micromorphology under the transmission electron microscope of fire-retardant dust suppressant emulsion latex grain.Left figure (a) is it can be seen that emulsion colloidal
Arrangement is close regular, there is apparent boundary between each micelle, and right figure (b) is microcosmic for the micelle observed under bigger multiple
Figure, as can be seen from the figure the micelle is diameter about in the core shell particles clear in structure of 180nm or so.It can wherein observe
Outer casing thickness to micelle is about 30nm or so, and whole shape is more regular consistent.
The present invention has also done following verifying:
1. weather-proof test
It is defined in TB/T 3210 " Railway Coal transports dust suppression technology condition " and uses wind erosion rate as measurement dust suppressant suppression
The index (wind erosion rate < 1% in the case where fountain height is no less than 1.5L/m2) of dirt effect.
Test method: screening 10 mesh~30 mesh coal sample removes moisture.The coal of appropriate amount is taken to be contained in 2 enamel respectively
Pallet keeps coal surface concordant with pallet, and weigh respectively, and wherein the quality of coal is W1.It is dense by quality is sprayed in two pallets
The fire-retardant dust suppressant (every square metre of sprinkling 1.5L) of degree 2% dries 120min under conditions of 50 DEG C in an oven and is respectively put into later
In wind-tunnel, coal surface is purged using the wind speed of 30m/s, then purge time 5min weighs respectively, remaining
The quality of coal is W2.Calculate separately sample wind erosion rate.
Wind erosion rate calculation formula are as follows:
L=(G2-G1)/G1 × 100%
In formula:
L-wind erosion rate, %；
G1-coal dust initial mass, g；
The quality of coal dust, g after G2-purging.
2. film stretch-proof is tested
The film for fire-retardant dust suppression agent emulsion will be prepared being cast into 1mm on polyfluortetraethylene plate.Use is taken after drying off to hold
The XWW-20B universal testing machine of De Jinjian detecting instrument Co., Ltd is tested its fracture and is stretched according to national standards (GB13022-91)
Long rate.
3. hindering rate test
Resistance rate is to measure an important parameter of fire-retardant dust suppressant flame retardant property (coal sample is at 100 DEG C before flame retardant treatment
The difference for the CO amount released afterwards and it is not fire retardant treated when the ratio between the CO amount released), the resistance more big fire-retardant dust suppressant of rate is to coal
Flame retardant property is better.
Use the resistance rate of programmed temperature method measurement sample, test method: by Indonesia's coal sample of 100-120 mesh in temperature 50
It dries in DEG C air dry oven to constant weight, it is spare to take out bottling sealing.Raw coal sample 25g is weighed, is put into porcelain dish, 2% matter is taken
The fire-retardant dust suppressant aqueous solution 15g for measuring concentration, is poured into raw coal sample, after mixing evenly, is done in temperature 50 C air dry oven
It is dry to after constant weight, be put into U-tube after crushing agglomeration, U-tube is put into constant temperature oil bath and heats, and temperature programming is liked using Changzhou
The gas samping pump of De Kesi instrument and meter Co., Ltd is evacuated (250mL/min).Use ADKS-1CO detector measurement CO's
Concentration calculates resistance rate.
Hinder rate calculation formula are as follows:
E=(S1-S2)/S1 × 100%
In formula:
E- hinders rate, %；
S1- raw coal sample discharges CO concentration, ppm；
S2- discharges CO concentration, ppm through fire-retardant dust suppression lotion processing coal sample.
The film elongation at break rate maximum formed after fire-retardant dust suppression agent emulsion is dry illustrates this fire-retardant dust suppression up to 513%
Agent is soft film type；Coal sample after spraying the fire-retardant dust suppressant of 2% mass concentration consolidates thickness after the wind speed of 30m/s purges 5min
Degree is 1.3cm, and wind erosion rate is only 0.66%, and resistance rate at 100 DEG C is 87.32%.
Claims (10)
1. a kind of fire-retardant dust suppressant of soft film type coal, is characterized in that, in terms of mass fraction, raw material includes following components:
1.0-3.0 parts of modifying agent, 8.0-9.0 parts of butyl acrylates, 1.5-1.7 parts of function monomers, 0.5-0.8 parts of flame-retardant monomers,
0.01-0.5 portions of phase transfer catalysts, 28.0-45.0 parts of polymerization main monomers, 2-3.5 parts of emulsifiers, 0.3-0.6 parts of initiators,
1.0-2.0 parts of pH buffers, 60.0-110.0 parts of deionized waters, 1.0-3.0 parts of fire retardants.
2. the fire-retardant dust suppressant of soft film type coal according to claim 1, is characterized in that, modifying agent be epoxy resin E-44 and
At least one of epoxy resin E-51.
3. the fire-retardant dust suppressant of soft film type coal according to claim 1, is characterized in that, flame-retardant monomer is phytic acid.
4. the fire-retardant dust suppressant of soft film type coal according to claim 1, is characterized in that, function monomer be methacrylic acid and
At least one of methyl methacrylate.
5. the fire-retardant dust suppressant of soft film type coal according to claim 1, is characterized in that, phase transfer catalyst is three second of benzyl
At least one of ammonium chloride, tetrabutylammonium bromide and tetrabutylammonium chloride.
6. the fire-retardant dust suppressant of soft film type coal according to claim 1, is characterized in that, polymerization main monomer is butyl acrylate
And styrene, the mass ratio of butyl acrylate and styrene are 3.75:1.
7. the fire-retardant dust suppressant of soft film type coal according to claim 1, is characterized in that, emulsifier is lauryl sodium sulfate
With polyoxethylene octylphenyl phenol ether -10 or alkyl phenol ether sulfosuccinic acid ester sodium salt and polyoxethylene octylphenyl phenol ether -10.
8. the fire-retardant dust suppressant of soft film type coal according to claim 1, is characterized in that, initiator is ammonium persulfate and sulfurous
Sour hydrogen sodium or potassium peroxydisulfate and sodium hydrogensulfite.
9. the fire-retardant dust suppressant of soft film type coal according to claim 1, is characterized in that, pH buffer is sodium bicarbonate and phosphorus
At least one of sour hydrogen sodium；
Fire retardant is at least one of ammonium polyphosphate and melamine phosphate.
10. a kind of preparation method of the fire-retardant dust suppressant of soft film type coal, which comprises the following steps:
(1) by 1.0-3.0 parts of modifying agent, 8.0-9.0 parts of butyl acrylates, 1.0-1.1 parts of function monomers, 0.5-0.8 parts it is fire-retardant
Intermediate is made in monomer and 0.01-0.5 parts of phase transfer catalyst mixing, insulation reaction 2-3h under the conditions of 100-120 DEG C；
(2) 0.50-0.60 parts of function monomers, 9.0-10.0 parts of polymerization main monomers, 1.5-2.5 parts of emulsifiers, 0.1-0.2 parts are drawn
It sends out agent, 0.5-1.0 parts of pH buffers and 20.0-40.0 parts of deionized waters to be uniformly mixed, then be reacted under the conditions of 75-85 DEG C
Seed emulsion is made in 20-30min；
0.5-1.0pH parts of buffers, 30.0-50.0 parts of deionized waters and 0.2-0.4 parts of initiators are mixed, it is molten to obtain initiator
Liquid；
(3) 19.0-35.0 parts of polymerization main monomers, 0.5-1.0 parts of emulsifiers and 10.0-20.0 parts of deionizations are added into intermediate
Water obtains pre-emulsion after stirring 20-30min；
(4) pre-emulsion and initiator solution is added dropwise simultaneously into seed emulsion, is added dropwise in 3-4h, in 75-85 DEG C of item
1.5-2.5h is reacted under part, obtains mixed system；
(5) mixed system is cooled to 40-50 DEG C, 1.0-3.0 parts of fire retardants is added and stir evenly, mixing cream is obtained after cooling
Liquid, the i.e. fire-retardant dust suppressant of soft film type coal.
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| CN115772384A (en) * | 2022-11-25 | 2023-03-10 | 廊坊市蓝星化工有限公司 | Coal storage and transportation flame-retardant dust suppressant and preparation method thereof |
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