CN103253890B - Improved spraying fire preventing and extinguishing material for coal mine and preparation method thereof - Google Patents

Abstract

The invention provides an improved spraying fire preventing and extinguishing material for coal mine and a preparation method of the material, and belongs to the technical field of fire preventing and extinguishing material. The material comprises 60 to 80% of flame retardant solution and 20 to 40% of inorganic aggregate, which are mixed with each other and stirred uniformly, wherein the flame retardant solution is obtained by carrying out a reaction on 4 to 8% of polyvinyl alcohol, 1 to 5% of phosphoric acid, 1 to 5% of urea, 10 to 30% of white emulsion and tap water; the inorganic aggregate is one or combinations of Kaolin, talcum powder and mica powder. The material provided by the invention has excellent adhesive quantity with coal body, the tensile strength of a film after film formation is great; and furthermore, the material has excellent insulation and low cost.

Description

Coal mining spraying fireproof material of a kind of improvement and preparation method thereof

Technical field

Coal mining spraying fireproof material that the present invention relates to a kind of improvement and preparation method thereof, belongs to fireproof material technical field.

Background technology

Coal in China is occupied an leading position in China energy general layout, probably account for 94%, if keep the speedup of annual 8.9%, the year two thousand twenty will account for 1/2 of world's consumption, and therefore, coal has very large strategic importance to China, huge interests are brought to the country and people, but the coal mining accident of China is but more than 4 times of main national colliery total toll of mining in the world, is one of country that coal mining accident is the most serious in the world, these accidents have brought huge body and mind injury and menticide.In coal mining accident, especially serious with gas accident, account for more than 30% of the total accident in colliery.After seam mining, the air quantity between ground and intake and between intake and return aircourse, between return aircourse and ground exchanges and becomes large gradually, and goaf air leaking is serious.The increase of air quantity brings the hidden danger of gas explosion and spontaneous combustion of coal seam.Because a denier air enters coal body inside, the spontaneous compound of coal oxygen releases amount of heat, and this heat is accumulated under certain accumulation of heat condition, when the heat gathered can meet the needs of Coal Self-ignition Process development, coal temperature constantly rises, and finally causes spontaneous combustion of coal.Therefore, process upper and lower two ends, worked-out section and lose the key that ribbing, isolation worked-out section and face up and down trough, worked-out section wind leaking stoppage are fully mechanized coal face prevention of Spontaneous Ignition.Spraying leak stopping preventing and extinguishing fire technology develops very fast in recent years, now having generally applying without coal column fully mechanized coal face of spontaneous fire.At face up and down trough, stop adopting near line and leak out place serious and adopt spraying leakage stopping technology application property good, wind leaking stoppage ability is strong, obviously can reduce the hidden danger of spontaneous combustion of coal seam and gas explosion.Phosphorus-nitrogenated flame retardant to be added in polyvinyl alcohol and with the spray material that white glue with vinyl is mixed to get, to there is environmental protection, the advantages such as unharmful substance is released, and film forming caudacoria compactness is good, and leak stopping is strong, resistanceization is fire-retardant.But it is low also to there is spray material viscosity, poor with the attached wall of coal body, the problem such as after film forming tensile strength is low.

Summary of the invention

Object of the present invention is intended to overcome above shortcoming, proposes that a kind of viscosity is suitable, large with good, the film forming caudacoria tensile strength of coal body tack, good insulating and cheap coal mining spraying fireproof material.

The present invention is achieved through the following technical solutions:

A kind of New type coal mining spraying fireproof material, by mutually to mix and stir fire resistant fluid and mineral aggregate form, wherein, each compositions in weight percentage is: the fire resistant fluid of 60-80%, the mineral aggregate of 20-40%; Described fire resistant fluid percent mass composition: 4%-8% polyvinyl alcohol, 1%-5% phosphoric acid, 1%-5% urea, 10%-30% white glue with vinyl and tap water reaction gained; Described mineral aggregate is one or more arbitrary combination in kaolin, talcum powder, mica powder.

Fire resistant fluid percent mass composition described above is preferably: 6% polyvinyl alcohol, 2% phosphoric acid, 2% urea, 20% white glue with vinyl and 70% tap water reaction gained.

A preparation method for New type coal mining spraying fireproof material, concrete steps comprise:

A) under water-bath, polyvinyl alcohol is joined abundant stirring and dissolving in tap water, temperature controls at 90 DEG C, stirs 5h;

B) phosphoric acid and urea are joined after mixed dissolution in the solution of a) step gained in tap water, react under the bath temperature of 85 DEG C, reaction times 5h;

C), after reacting completely, when solution cool to room temperature, add white glue with vinyl be stirred well to evenly;

D) get mineral aggregate and join step c) fully stir 2h in the fire resistant fluid of gained, wherein fire resistant fluid accounts for mass ratio 60-80%, and mineral aggregate accounts for mass ratio 20-40%.

A kind of New type coal mining spraying fireproof material of the present invention, comparing fire resistant fluid has following significantly advantage:

1. under the condition not affecting spraying coating process, improve the viscosity of colloid, increase the sticking power of fireproof material and coal body, the film thickness obtained after spraying has obvious increase;

2. improve the tensile strength of material, and shorten the set time of material;

3. improve the flame retardant properties of material;

4. due to inorganic powder itself, powder add the insulativity, ageing resistance, durability of coating energy and the oilness that improve fireproof material

5. aggregate add the cost reducing material.

Embodiment

Embodiment 1

1) under water-bath, 6g polyvinyl alcohol is joined abundant stirring and dissolving in 20g tap water, temperature controls at 90 DEG C, stirs 5h;

2) 2g phosphoric acid and 2g urea slowly being joined 1 after mixed dissolution in 10g tap water) in the solution of step gained, adding 40g tap water after dropwising under the bath temperature of 85 DEG C reacts, reaction times 5h;

3), after reacting completely, when solution cool to room temperature, add 20g white glue with vinyl be stirred well to evenly;

4) get 20g talcum powder, 10g kaolin and 10g mica powder and join step 3) fully stir 2h in the fire resistant fluid of gained.

The fireproof material of gained once sprays thickness and can reach 0.5mm, and can certainly put out after lighting rear 5s with spirit lamp, the tensile strength of fire retardant material reaches 8.3MPa, and surface resistivity is 9.2 × 10 ⁷Ω.

Embodiment 2

1) under water-bath, 6g polyvinyl alcohol is joined abundant stirring and dissolving in 20g tap water, temperature controls at 90 DEG C, stirs 5h;

2) 2g phosphoric acid and 2g urea slowly being joined 1 after mixed dissolution in 10g tap water) in the solution of step gained, adding 40g tap water after dropwising under the bath temperature of 85 DEG C reacts, reaction times 5h;

3), after reacting completely, when solution cool to room temperature, add 20g white glue with vinyl be stirred well to evenly;

4) get 10g talcum powder, 10g kaolin and 10g mica powder and join step 3) fully stir 2h in the fire resistant fluid of gained.

The fireproof material of gained once sprays thickness and can reach 0.5mm, and can certainly put out after lighting rear 4s with spirit lamp, the tensile strength of fire retardant material reaches 7MPa, surface resistivity 1.1 × 10 ⁸Ω.

Claims (3)

1. a coal mining spraying fireproof material, is characterized in that, by mutually to mix and stir fire resistant fluid and mineral aggregate form, wherein, each compositions in weight percentage is: the fire resistant fluid of 60-80%, the mineral aggregate of 20-40%; Described fire resistant fluid percent mass composition: 4%-8% polyvinyl alcohol, 1%-5% phosphoric acid, 1%-5% urea, 10%-30% white glue with vinyl and tap water reaction gained; Described mineral aggregate is one or more arbitrary combination in kaolin, talcum powder, mica powder.

2., according to a kind of coal mining spraying fireproof material of claim 1, it is characterized in that, fire resistant fluid percent mass composition preferably: 6% polyvinyl alcohol, 2% phosphoric acid, 2% urea, 20% white glue with vinyl and 70% tap water reaction gained.

3. prepare the method for the coal mining spraying fireproof material of claim 1, it is characterized in that, comprise the following steps:

A) under water-bath, polyvinyl alcohol is joined abundant stirring and dissolving in tap water, temperature controls at 90 DEG C, stirs 5h;

B) phosphoric acid and urea are joined after mixed dissolution in the solution of a) step gained in tap water, react under the bath temperature of 85 DEG C, reaction times 5h;

C), after reacting completely, when solution cool to room temperature, add white glue with vinyl be stirred well to evenly;

D) get mineral aggregate and join step c) fully stir 2h in the fire resistant fluid of gained, wherein fire resistant fluid accounts for mass ratio 60-80%, and mineral aggregate accounts for mass ratio 20-40%.