CN110870963A

CN110870963A - Novel fire-fighting material and preparation method thereof

Info

Publication number: CN110870963A
Application number: CN201911099613.4A
Authority: CN
Inventors: 张平; 石力; 童晶
Original assignee: Sichuan Tiandi Tongguang Technology Co Ltd
Current assignee: Sichuan Tiandi Tongguang Technology Co Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-03-10

Abstract

The invention discloses a novel fire-fighting fire-extinguishing material and a preparation method thereof, wherein the fire-fighting material comprises ore soil and clay, and the preparation method comprises the following steps of crushing, impurity removal, acidity removal, drying, surface modification, water washing to neutrality, filtering removal, drying, grinding, wet grinding, and preparing the obtained suspension into the fire-fighting material. In the invention, because the mineral soil and the clay are used as raw materials, the main components of the finished product are natural minerals, the cost is lower, the finished product is non-toxic and harmless, the environment is not adversely affected, and meanwhile, harmful substances are not derived in the fire fighting process, so that the practicability is strong.

Description

Novel fire-fighting material and preparation method thereof

Technical Field

The invention belongs to the field of fire extinguishing materials, and particularly belongs to a novel fire extinguishing material and a preparation method thereof.

Background

Fire prevention and flame retardation are always important issues for preventing natural disasters and protecting people. Water, sand, are the most primitive fire extinguishing materials, and later there are other types of fire extinguishing materials, respectively: water-based fire extinguishing agents, dry powder fire extinguishing agents, foam fire extinguishing agents, gas fire extinguishing agents, and non-combustible organic liquid fire extinguishing agents such as alkyl halides. The fire-extinguishing and fire-retardant properties of these materials have advantages and disadvantages, but are not applicable in some cases, such as: in a fire such as a power battery, after the power battery is ignited, the battery is burnt in an oxygen-free mode, and the using effect of common fire extinguishers (dry powder, foam and the like) for extinguishing fire by isolating oxygen is difficult to achieve.

Therefore, the patent discloses the preparation of a fire extinguishing and flame retarding raw material of water-based suspension of solid mineral substances and the like, and the fire extinguishing and preventing material prepared from the fire extinguishing and flame retarding raw material has good fluidity, adhesiveness and isolation, can extinguish most fire sources, and simultaneously has the temperature reduction property, and can achieve the fire extinguishing effect by quickly reducing the temperature of a battery when a power battery is ignited for fire extinguishing operation.

Disclosure of Invention

The invention aims to: provides a novel fire-fighting material with good fire-fighting performance and capable of extinguishing the fire of a power battery and a preparation method thereof.

The technical scheme adopted by the invention is as follows: a novel fire-fighting material and a preparation method thereof, wherein the raw materials of the fire-fighting material comprise ore soil and clay, and the preparation method of the fire-fighting material comprises the following steps:

the method comprises the following steps: crushing and grinding raw materials, and sequentially adding 98% of concentrated sulfuric acid, concentrated hydrochloric acid and hydrogen peroxide into the raw materials for reaction to obtain a first reactant;

step two: standing, removing liquid in the first reactant, washing with deionized water, and drying to obtain intermediate powder;

step three: adding a mixed solution of perchloric acid and glacial acetic acid into the intermediate powder to obtain a second reactant;

step four: after full reaction, removing liquid in the second reactant, washing the second reactant to be neutral, filtering and drying the second reactant to obtain a coarse powder material;

step five: grinding the coarse powder material to obtain a fine powder material;

step six: and wet grinding the fine powder to obtain the nano-grade slurry.

It is worth mentioning that the mineral soil in the scheme comprises a series of various materials such as quartz, sand, vermiculite, graphite, fluorite, mica, lime, pyroxene and the like; clays include various clays formed from weathered silicates such as kaolinite, petrolatum, montmorillonite, vermiculite, and illite.

Preferably, the particle size of the powder ground by the raw material in the step one is larger than 100 meshes. The particle size of the powder is larger than 100 meshes of raw materials, so that the raw materials can be ensured to fully react with concentrated sulfuric acid, concentrated hydrochloric acid and hydrogen peroxide, and impurities are prevented from being retained in the first reactant.

Preferably, in the first step, the concentration of the concentrated hydrochloric acid is 36% -38%, the concentration of the hydrogen peroxide is more than 90%, and the reaction time of the hydrogen peroxide is three hours. Through the sequential reaction of concentrated sulfuric acid, concentrated hydrochloric acid and hydrogen peroxide, impurities in the raw materials can be removed, and the influence of the impurities on the quality of a finished product is avoided. It is worth mentioning that in the step one, the proportion of concentrated sulfuric acid, concentrated hydrochloric acid and hydrogen peroxide is preferably 5:4:2, and at least 2.5 liters of concentrated sulfuric acid is used for removing the mass of each kilogram of raw materials, so that the impurities are fully removed.

Preferably, the deionized water washing process in the second step is performed at least three times, and at least five liters of deionized water is used for each single washing of one kilogram of reactants. Repeated deionized water cleaning can ensure that no acid residue exists in the cleaned intermediate powder, and influence on subsequent reaction is avoided.

Preferably, the reaction temperature in the third step is 40 ℃, six liters of mixed solution is used for reacting each kilogram of reactants, the volume ratio of perchloric acid to glacial acetic acid in the mixed solution is 2:1, and the reaction time is one hour. And step three, the reaction of the mixed solution can modify the surface of the intermediate powder, improve the adhesiveness, the fluidity and the like of the powder, and the reaction temperature of 40 ℃ and the reaction time of one hour can ensure that the intermediate powder and the mixed solution are fully reacted.

Preferably, in the fifth step, the particle size of the mineral powder is larger than 300 meshes. The mineral powder with the particle size larger than 300 meshes can improve the adhesiveness, the isolation and the like of the fire extinguishing material, and further improve the fire extinguishing effect.

Preferably, in the wet grinding process of the sixth step, a wet grinding solution is added, wherein the wet grinding solution is an aqueous dispersing agent with the concentration of 1% -3%, and the weight ratio of the wet grinding solution to the coarse powder material is 3: 1. The wet grinding solution arranged in proportion can improve the stability of the wet grinding process and ensure that the particle size of the finished slurry reaches the nanometer level.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. in the invention, the mineral soil and the clay are used as the fire extinguishing materials of the raw materials, and the complex chemical synthesis of special halide is not needed in the processing process, so the cost is lower, and the use cost is reduced.

2. In the invention, the fire extinguishing material adopts the mineral soil and the clay as raw materials, has extremely stable chemical properties, does not derive harmful substances in the fire extinguishing process, and can be recycled after being used in large quantity.

3. The fire extinguishing material has good fluidity, adhesiveness, isolation and temperature reduction when in use.

4. In the invention, as the raw materials are the mineral soil and the clay, the main components in the finished product are natural minerals, and the mineral soil and the clay are nontoxic and harmless, do not cause adverse effects on the environment, simultaneously do not derive harmful substances in the fire fighting process, and can be recycled after being used in large quantities.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of generally illustrated embodiments of the present invention may be arranged and designed in a wide variety of different configurations.

Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention without making an invasive step, are within the scope of protection of the invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The first embodiment is as follows:

as a preferred embodiment of the present invention, a novel fire-fighting material and a preparation method thereof are disclosed, in this embodiment, the fire-fighting material comprises mineral soil as a raw material, and the preparation method of the fire-fighting material comprises the following steps:

the method comprises the following steps: crushing and grinding the ore soil, filtering the ore soil by using a 100-mesh sieve, and weighing to obtain 10KG powder;

step two: adding 25L of 98% concentrated sulfuric acid into the powder, uniformly stirring, adding 20L of 38% concentrated hydrochloric acid, continuously stirring, adding 10L of 90% hydrogen peroxide, and continuously stirring for three hours to obtain a first reactant;

step three: standing the first reactant for half an hour, pouring out the solution to obtain powder, washing the powder for three times according to the proportion of 5L deionized water per kilogram of the powder, and drying to obtain intermediate powder;

step four: weighing the intermediate powder, placing the intermediate powder into a reaction kettle at 40 ℃, reacting according to the proportion of 6L of mixed solution per kilogram of powder, wherein the mixed solution is perchloric acid and glacial acetic acid mixed solution containing 2.5% of potassium permanganate and 0.5% of ammonium nitrate, the volume ratio of the perchloric acid to the glacial acetic acid is 2:1, and stirring for one hour to obtain a second reactant;

step five: and pouring out the liquid in the second reactant, washing with water to be neutral, carrying out suction filtration on the liquid, and drying to obtain a coarse powder material.

Step six: and (3) placing the coarse powder material into a mill (Guilin Hongcheng HCQ modified mill) for milling, and sieving a finished product with a 300-mesh sieve to obtain a fine powder material.

Step seven: adding the fine powder material into a sand mill (Miller CBN-25 pin type nanometer sand mill), and mixing the fine powder material: adding 0.2% aqueous dispersant into the solution in a weight ratio of 7:3, setting the rotating speed to be 20-30rmp, and wet-grinding for 8-12 hours to obtain nano-scale slurry (fire extinguishing material raw material).

Example two:

the invention discloses a novel fire-fighting material and a preparation method thereof as a preferred embodiment of the invention.

The invention is not to be considered as limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. The novel fire-fighting fire extinguishing material comprises the following raw materials of mineral soil and clay, and the preparation method of the fire extinguishing material comprises the following steps:

step six: and wet grinding the fine powder to obtain the nano-grade slurry.

2. A novel fire-fighting extinguishing material and preparation method thereof according to claim 1, characterized in that the particle size of the powder after raw material grinding in the first step is larger than 100 meshes.

3. A novel fire-fighting extinguishing material and preparation method thereof as claimed in claim 1, characterized in that in step one, the concentration of concentrated hydrochloric acid is 36% -38%, the concentration of hydrogen peroxide is more than 90%, and the reaction time of hydrogen peroxide is three hours.

4. A novel fire-fighting extinguishing material and preparation method thereof according to claim 1, characterized in that the deionized water cleaning process in the second step is performed at least three times, and at least five liters of deionized water is used for each single cleaning of one kilogram of reactants.

5. A novel fire-fighting extinguishing material and preparation method thereof according to claim 1, characterized in that the reaction temperature in the third step is 40 ℃, six liters of mixed solution is used for reaction per kilogram of reactants, the volume ratio of perchloric acid to glacial acetic acid in the mixed solution is 2:1, and the reaction time is one hour.

6. A novel fire-fighting extinguishing material and preparation method thereof according to claim 1, characterized in that the particle size of the fine powder in step five is larger than 300 mesh.

7. The novel fire-fighting extinguishing material and the preparation method thereof according to claim 1, characterized in that in the wet grinding process of the sixth step, a wet grinding solution is added, the wet grinding solution is an aqueous dispersant with a concentration of 1% -3%, and the weight ratio of the wet grinding solution to the fine powder is 3: 1.