CN112642086A - Method for preparing rare earth element composite high-efficiency superfine powder fire extinguishing agent by ball milling method - Google Patents
Method for preparing rare earth element composite high-efficiency superfine powder fire extinguishing agent by ball milling method Download PDFInfo
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- CN112642086A CN112642086A CN202011506647.3A CN202011506647A CN112642086A CN 112642086 A CN112642086 A CN 112642086A CN 202011506647 A CN202011506647 A CN 202011506647A CN 112642086 A CN112642086 A CN 112642086A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0007—Solid extinguishing substances
- A62D1/0014—Powders; Granules
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Abstract
The invention provides a method for preparing a rare earth element compounded high-efficiency superfine powder extinguishing agent by a ball milling method. The method utilizes a ball milling method to mix and refine rare earth element compounds, powder fire extinguishing agent base materials and fire extinguishing agent auxiliary materials, and utilizes emulsified silicone oil to carry out surface hydrophobic treatment for modification, thereby obtaining the high-efficiency superfine powder fire extinguishing agent. The method further improves the fire extinguishing performance of the fire extinguishing agent by utilizing the high-efficiency fire extinguishing performance of the rare earth elements, and refines all the raw materials simultaneously by utilizing a ball milling method by adopting a one-pot method, so that the particle size of the raw materials can be effectively reduced, all the raw materials are mixed more uniformly, static electricity generated in the ball milling process can be eliminated by utilizing the rare earth element compound, and powder particles are prevented from agglomerating.
Description
Technical Field
The invention belongs to the technical field of preparation of superfine powder fire extinguishing agents, and particularly relates to a method for preparing a rare earth element composite efficient superfine powder fire extinguishing agent by a ball milling method.
Background
The powder fire extinguishing agent is considered to be one of potential substitutes of a 'Halon' fire extinguishing agent due to the excellent characteristics of high fire extinguishing efficiency and low ODP and GWP values. The effective components of the existing powder fire extinguishing agent are mainly phosphate and carbonate, although the fire extinguishing performance of the fire extinguishing agent can be improved to a certain extent by refining the particle size of the fire extinguishing agent, the fire extinguishing performance of the superfine powder fire extinguishing agent (particularly the particle size is smaller than the limit particle size of the fire extinguishing agent) reaches the limit basically. Therefore, it is necessary to develop a new method for further improving the fire extinguishing performance of the ultrafine powder fire extinguishing agent.
The rare earth element compound is a good flame-retardant heat-insulating material, and meanwhile, the rare earth (particularly lanthanum, cerium, yttrium, praseodymium, neodymium and the like) in China has the advantages of large reserves, large yield and low price. If the rare earth element compound is compounded with the traditional powder extinguishing agent, the extinguishing performance of the powder extinguishing agent can be further improved through the synergistic extinguishing effect, the production cost of the powder extinguishing agent can not be obviously increased, and the powder extinguishing agent is convenient for industrial production and market popularization. Therefore, how to effectively compound the rare earth element compound with the traditional powder extinguishing agent to prepare the rare earth element compound superfine powder extinguishing agent is the key for further improving the fire extinguishing performance of the existing powder extinguishing agent.
Ball milling is a common method for preparing powder materials, and is divided into a wet method and a dry method, wherein the wet method needs a large amount of solvent and is poor in environmental protection property; the smaller the particle size of the powder prepared by the dry method is, the more serious the agglomeration phenomenon caused by static electricity is.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a method for preparing a rare earth element composite high-efficiency superfine powder fire extinguishing agent by a ball milling method.
In order to achieve the aim, the method for preparing the rare earth element composite high-efficiency superfine powder fire extinguishing agent by the ball milling method provided by the invention comprises the following steps in sequence:
(1) uniformly mixing the powder fire extinguishing agent base material, the fire extinguishing agent auxiliary material and the rare earth element compound according to a proportion, and then carrying out ball milling by using a ball mill to prepare powder;
(2) and uniformly mixing the powder and emulsified silicone oil in proportion, performing surface hydrophobic treatment at the temperature of 40-70 ℃ for 5-10 hours, and finally drying at the temperature of 80-100 ℃ for 1-2 hours to obtain the high-efficiency superfine powder extinguishing agent.
In the step (1), the powder fire extinguishing agent base material is selected from at least one of ammonium monohydrogen phosphate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, sodium bicarbonate and potassium bicarbonate.
In the step (1), the fire extinguishing agent auxiliary material is selected from at least one of zeolite, perlite, magnesite, mica powder, talcum powder, bentonite and hydrophobic white carbon black.
In the step (1), the rare earth element compound is at least one selected from lanthanum carbonate, lanthanum phosphate, lanthanum nitrate, lanthanum oxide, cerium carbonate, cerium phosphate, cerium nitrate, cerium oxide, yttrium carbonate, yttrium phosphate, yttrium oxide, praseodymium carbonate, praseodymium phosphate, praseodymium nitrate, praseodymium oxide, neodymium carbonate, neodymium phosphate, neodymium nitrate and neodymium oxide.
In the step (1), the mass ratio of the powder fire extinguishing agent base material to the fire extinguishing agent auxiliary material to the rare earth element compound is 50-90: 5-30: 1-20.
In the step (1), the frequency of the ball mill is 20-35 Hz, and the ball milling time is 1-4 hours.
In the step (2), the mass ratio of the powder to the emulsified silicone oil is 98-99.7: 0.3-2.
The invention provides a method for preparing a rare earth element composite high-efficiency superfine powder extinguishing agent by a ball milling method, which mainly adopts the technical principle that: the rare earth element compound, the powder fire extinguishing agent base material and the fire extinguishing agent auxiliary material are mixed and refined by a ball milling method, and then are modified by surface hydrophobic treatment by emulsified silicone oil, so that the high-efficiency superfine powder fire extinguishing agent is obtained. The method further improves the fire extinguishing performance of the fire extinguishing agent by utilizing the high-efficiency fire extinguishing performance of the rare earth elements, and refines all the raw materials simultaneously by utilizing a ball milling method by adopting a one-pot method, so that the particle size of the raw materials can be effectively reduced, all the raw materials are mixed more uniformly, static electricity generated in the ball milling process can be eliminated by utilizing the rare earth element compound, and powder particles are prevented from agglomerating.
Compared with the prior art, the method for preparing the rare earth element composite high-efficiency superfine powder extinguishing agent by the ball milling method has the following effects: (1) the high-efficiency superfine powder fire extinguishing agent prepared by the invention contains rare earth elements, and the fire extinguishing efficiency of the fire extinguishing agent can be effectively improved through the synergistic fire extinguishing effect; (2) according to the invention, the rare earth element compound, the powder fire extinguishing agent base material and the fire extinguishing agent auxiliary material are subjected to a one-pot ball milling method, so that the composite superfine powder fire extinguishing agent with small particle size and uniform mixing can be obtained, and meanwhile, the electrostatic agglomeration phenomenon of micro-nano-scale powder can be effectively eliminated by adding various composite components; (3) the invention has simple operation method, low cost of raw materials and high fire extinguishing performance of the fire extinguishing agent, and can realize large-scale industrial production.
Detailed Description
The present invention is further described in the following description of the specific embodiments, which is not intended to limit the invention, but various modifications and improvements can be made by those skilled in the art according to the basic idea of the invention, within the scope of the invention, as long as they do not depart from the basic idea of the invention.
Example 1
The method for preparing the rare earth element composite high-efficiency superfine powder fire extinguishing agent by the ball milling method provided by the embodiment comprises the following steps in sequence:
(1) uniformly mixing ammonium dihydrogen phosphate, bentonite and yttrium oxide according to the mass ratio of 80:13:7, and then performing ball milling by using a ball mill to prepare powder; wherein the frequency of the ball mill is 35Hz, and the ball milling time is 2 hours;
(2) uniformly mixing the powder and emulsified silicone oil according to a mass ratio of 99:1, then carrying out surface hydrophobic treatment for 8 hours at a temperature of 55 ℃, and finally drying for 2 hours at a temperature of 100 ℃ to obtain the high-efficiency superfine powder extinguishing agent.
Through the test of a laser particle size analyzer, the particle size (D90) of the high-efficiency superfine powder fire extinguishing agent prepared by the embodiment is about 1 micron; through the test of a Cup-type burner (Cup-burner), the fire extinguishing concentration of the high-efficiency superfine powder fire extinguishing agent to standard methane fire is 54g/m-3. Under the same experimental conditions, the fire extinguishing concentration of the superfine dry powder fire extinguishing agent without the rare earth element compound to the standard methane fire is 146g/m-3。
Example 2
The method for preparing the rare earth element composite high-efficiency superfine powder fire extinguishing agent by the ball milling method provided by the embodiment comprises the following steps in sequence:
(1) uniformly mixing potassium bicarbonate, zeolite and cerium oxide according to a mass ratio of 80:13:7, and then carrying out ball milling by using a ball mill to prepare powder; wherein the frequency of the ball mill is 35Hz, and the ball milling time is 2 hours;
(2) uniformly mixing the powder and emulsified silicone oil according to a mass ratio of 99:1, then carrying out surface hydrophobic treatment for 8 hours at a temperature of 55 ℃, and finally drying for 2 hours at a temperature of 100 ℃ to obtain the high-efficiency superfine powder extinguishing agent.
Through the test of a laser particle size analyzer, the particle size (D90) of the high-efficiency superfine powder fire extinguishing agent prepared by the embodiment is about 1.2 microns; through the test of a Cup-type burner (Cup-burner), the fire extinguishing concentration of the high-efficiency superfine powder fire extinguishing agent to standard methane fire is 51g/m-3. Under the same experimental conditions, the fire extinguishing concentration of the superfine dry powder fire extinguishing agent without the rare earth element compound to the standard methane fire is 146g/m-3。
Example 3
The method for preparing the rare earth element composite high-efficiency superfine powder fire extinguishing agent by the ball milling method provided by the embodiment comprises the following steps in sequence:
(1) uniformly mixing ammonium monohydrogen phosphate, perlite and lanthanum oxide according to the mass ratio of 80:13:7, and then performing ball milling by using a ball mill to prepare powder; wherein the frequency of the ball mill is 35Hz, and the ball milling time is 2 hours;
(2) uniformly mixing the powder and emulsified silicone oil according to a mass ratio of 99:1, then carrying out surface hydrophobic treatment for 8 hours at a temperature of 55 ℃, and finally drying for 2 hours at a temperature of 100 ℃ to obtain the high-efficiency superfine powder extinguishing agent.
Through the test of a laser particle size analyzer, the particle size (D90) of the high-efficiency superfine powder fire extinguishing agent prepared by the embodiment is about 1.6 microns; through the test of a Cup-type burner (Cup-burner), the fire extinguishing concentration of the high-efficiency superfine powder fire extinguishing agent to standard methane fire is 59g/m-3. Under the same experimental conditions, the fire extinguishing concentration of the superfine dry powder fire extinguishing agent without the rare earth element compound to the standard methane fire is 146g/m-3。
Example 4
The method for preparing the rare earth element composite high-efficiency superfine powder fire extinguishing agent by the ball milling method provided by the embodiment comprises the following steps in sequence:
(1) uniformly mixing potassium dihydrogen phosphate, mica powder and praseodymium phosphate according to a mass ratio of 80:13:7, and then carrying out ball milling by using a ball mill to prepare powder; wherein the frequency of the ball mill is 35Hz, and the ball milling time is 2 hours;
(2) uniformly mixing the powder and emulsified silicone oil according to a mass ratio of 99:1, then carrying out surface hydrophobic treatment for 8 hours at a temperature of 55 ℃, and finally drying for 2 hours at a temperature of 100 ℃ to obtain the high-efficiency superfine powder extinguishing agent.
Through the test of a laser particle size analyzer, the particle size (D90) of the high-efficiency superfine powder fire extinguishing agent prepared by the embodiment is about 1.1 micron; through the test of a Cup-type burner (Cup-burner), the fire extinguishing concentration of the high-efficiency superfine powder fire extinguishing agent to standard methane fire is 55g/m-3. Under the same experimental conditions, the fire extinguishing concentration of the superfine dry powder fire extinguishing agent without the rare earth element compound to the standard methane fire is 146g/m-3。
Example 5
The method for preparing the rare earth element composite high-efficiency superfine powder fire extinguishing agent by the ball milling method provided by the embodiment comprises the following steps in sequence:
(1) uniformly mixing sodium bicarbonate, hydrophobic white carbon black and neodymium oxide according to the mass ratio of 80:13:7, and then performing ball milling by using a ball mill to prepare powder; wherein the frequency of the ball mill is 35Hz, and the ball milling time is 2 hours;
(2) uniformly mixing the powder and emulsified silicone oil according to a mass ratio of 99:1, then carrying out surface hydrophobic treatment for 8 hours at a temperature of 55 ℃, and finally drying for 2 hours at a temperature of 100 ℃ to obtain the high-efficiency superfine powder extinguishing agent.
Through the test of a laser particle size analyzer, the particle size (D90) of the high-efficiency superfine powder fire extinguishing agent prepared by the embodiment is about 1.8 microns; through the test of a Cup-type burner (Cup-burner), the fire extinguishing concentration of the high-efficiency superfine powder fire extinguishing agent to standard methane fire is 57g/m-3. Under the same experimental conditions, the fire extinguishing concentration of the superfine dry powder fire extinguishing agent without the rare earth element compound to the standard methane fire is 146g/m-3。
Claims (7)
1. A method for preparing a rare earth element composite high-efficiency superfine powder extinguishing agent by a ball milling method is characterized by comprising the following steps: the method comprises the following steps which are carried out in sequence:
(1) uniformly mixing the powder fire extinguishing agent base material, the fire extinguishing agent auxiliary material and the rare earth element compound according to a proportion, and then carrying out ball milling by using a ball mill to prepare powder;
(2) and uniformly mixing the powder and emulsified silicone oil in proportion, performing surface hydrophobic treatment at the temperature of 40-70 ℃ for 5-10 hours, and finally drying at the temperature of 80-100 ℃ for 1-2 hours to obtain the high-efficiency superfine powder extinguishing agent.
2. The method for preparing the rare earth element compounded high-efficiency superfine powder fire extinguishing agent by the ball milling method according to claim 1, which is characterized in that: in the step (1), the powder fire extinguishing agent base material is selected from at least one of ammonium monohydrogen phosphate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, sodium bicarbonate and potassium bicarbonate.
3. The method for preparing the rare earth element compounded high-efficiency superfine powder fire extinguishing agent by the ball milling method according to claim 1, which is characterized in that: in the step (1), the fire extinguishing agent auxiliary material is selected from at least one of zeolite, perlite, magnesite, mica powder, talcum powder, bentonite and hydrophobic white carbon black.
4. The method for preparing the rare earth element compounded high-efficiency superfine powder fire extinguishing agent by the ball milling method according to claim 1, which is characterized in that: in the step (1), the rare earth element compound is at least one selected from lanthanum carbonate, lanthanum phosphate, lanthanum nitrate, lanthanum oxide, cerium carbonate, cerium phosphate, cerium nitrate, cerium oxide, yttrium carbonate, yttrium phosphate, yttrium oxide, praseodymium carbonate, praseodymium phosphate, praseodymium nitrate, praseodymium oxide, neodymium carbonate, neodymium phosphate, neodymium nitrate and neodymium oxide.
5. The method for preparing the rare earth element compounded high-efficiency superfine powder fire extinguishing agent by the ball milling method according to claim 1, which is characterized in that: in the step (1), the mass ratio of the powder fire extinguishing agent base material to the fire extinguishing agent auxiliary material to the rare earth element compound is 50-90: 5-30: 1-20.
6. The method for preparing the rare earth element compounded high-efficiency superfine powder fire extinguishing agent by the ball milling method according to claim 1, which is characterized in that: in the step (1), the frequency of the ball mill is 20-35 Hz, and the ball milling time is 1-4 hours.
7. The method for preparing the rare earth element compounded high-efficiency superfine powder fire extinguishing agent by the ball milling method according to claim 1, which is characterized in that: in the step (2), the mass ratio of the powder to the emulsified silicone oil is 98-99.7: 0.3-2.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115676853A (en) * | 2022-11-11 | 2023-02-03 | 天津航空机电有限公司 | Method for dry chemical modification of superfine dry powder extinguishing agent by ball milling |
| CN116474306A (en) * | 2023-05-26 | 2023-07-25 | 中国民航大学 | Cooling type dry powder extinguishing agent and preparation method and application thereof |
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| CN109045549A (en) * | 2018-09-17 | 2018-12-21 | 蚌埠市龙泰消防有限公司 | A kind of preparation method of ultra-fine dry powder extinguishing agent |
| CN110193162A (en) * | 2019-07-05 | 2019-09-03 | 佛山市华昊化工有限公司 | Ultra-fine ABC powder extinguishing agent and its production method |
| CN110393885A (en) * | 2019-05-31 | 2019-11-01 | 天津城建大学 | A kind of compound superfine powder extinguishing chemical and preparation method thereof |
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2020
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Patent Citations (5)
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| CN101485927A (en) * | 2009-02-25 | 2009-07-22 | 宁波能林消防器材有限公司 | Method for preparing full-silicide ABC dry powder fire fighting agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115676853A (en) * | 2022-11-11 | 2023-02-03 | 天津航空机电有限公司 | Method for dry chemical modification of superfine dry powder extinguishing agent by ball milling |
| CN116474306A (en) * | 2023-05-26 | 2023-07-25 | 中国民航大学 | Cooling type dry powder extinguishing agent and preparation method and application thereof |
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