CN114890853A - Ignition powder for preparing solid oxygen candle by chemical precipitation method - Google Patents
Ignition powder for preparing solid oxygen candle by chemical precipitation method Download PDFInfo
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- CN114890853A CN114890853A CN202210612700.0A CN202210612700A CN114890853A CN 114890853 A CN114890853 A CN 114890853A CN 202210612700 A CN202210612700 A CN 202210612700A CN 114890853 A CN114890853 A CN 114890853A
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- powder
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- barium
- solution
- oxygen candle
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 49
- 239000001301 oxygen Substances 0.000 title claims abstract description 49
- 239000000843 powder Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007787 solid Substances 0.000 title claims abstract description 22
- 238000009388 chemical precipitation Methods 0.000 title claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 43
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000203 mixture Substances 0.000 claims abstract description 27
- QFFVPLLCYGOFPU-UHFFFAOYSA-N barium chromate Chemical compound [Ba+2].[O-][Cr]([O-])(=O)=O QFFVPLLCYGOFPU-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229940083898 barium chromate Drugs 0.000 claims abstract description 24
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 159000000009 barium salts Chemical class 0.000 claims abstract description 15
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 15
- 239000011651 chromium Substances 0.000 claims abstract description 15
- 239000012266 salt solution Substances 0.000 claims abstract description 15
- 239000011230 binding agent Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 28
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 claims description 26
- 229910001626 barium chloride Inorganic materials 0.000 claims description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- PXLIDIMHPNPGMH-UHFFFAOYSA-N sodium chromate Chemical compound [Na+].[Na+].[O-][Cr]([O-])(=O)=O PXLIDIMHPNPGMH-UHFFFAOYSA-N 0.000 claims description 14
- 239000005995 Aluminium silicate Substances 0.000 claims description 6
- 235000012211 aluminium silicate Nutrition 0.000 claims description 6
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 239000002245 particle Substances 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000002360 explosive Substances 0.000 description 5
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- ZJRXSAYFZMGQFP-UHFFFAOYSA-N barium peroxide Chemical compound [Ba+2].[O-][O-] ZJRXSAYFZMGQFP-UHFFFAOYSA-N 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B27/00—Compositions containing a metal, boron, silicon, selenium or tellurium or mixtures, intercompounds or hydrides thereof, and hydrocarbons or halogenated hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/001—Fillers, gelling and thickening agents (e.g. fibres), absorbents for nitroglycerine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention relates to the field of oxygen candles, and provides an ignition powder for preparing a solid oxygen candle by a chemical precipitation method. The method for preparing the solid ignition powder for the oxygen candle by the chemical precipitation method comprises the following steps: mixing the barium salt solution, the chromium source solution and the boron powder for reaction to generate a mixture of barium chromate and the boron powder, and adding the binder after the reaction is finished. The invention utilizes the reaction of barium salt solution and chromium source solution to prepare barium chromate, and simultaneously utilizes the property that boron powder is insoluble in the solution, thereby preparing the ignition powder for the oxygen candle with smaller particle size and better ignition performance by a chemical precipitation method, and the ignition powder has stronger surface free-running property, more uniform mixing, better ignition performance and stable combustion. The particles after combustion are uniform in size and distribution. Meanwhile, ignition and fire transmission can be realized in the environment of-40 ℃.
Description
Technical Field
The invention relates to the field of oxygen candles, in particular to an ignition powder for preparing a solid oxygen candle by a chemical precipitation method.
Background
Oxygen candles, a solid chemical oxygen generator, have a high oxygen storage capacity, similar to the density of liquid oxygen, which is approximately 3 times the compressed oxygen volume. The oxygen candle is relatively stable, does not generate leakage phenomenon, and has the advantages of rapid oxygen production, large oxygen production amount, small equipment volume, light weight, long storage period and the like. The oxygen candle mainly comprises an ignition system, an oxygen production system, a heat insulation system and a filtering system, ignition is initiated by the ignition system when the oxygen candle generates chemical reaction to release oxygen, wherein the quality of ignition powder is very critical.
At present, the ignition powder for the oxygen candle is deeply researched, and the ignition target can be basically realized. For example, the related art discloses using zirconium powder as a main raw material and barium nitrate or barium peroxide as an oxidizing agent. For another example, the related art discloses that an ignition charge is made of barium chromate, elemental metals (magnesium powder, aluminum powder, titanium powder, and iron powder) and a binder.
However, the ignition chemicals for the oxygen candle have some defects, the oxidizing agent barium nitrate in the ignition chemicals is easy to absorb moisture and deteriorate, and barium peroxide is easy to decompose, so that the ignition chemicals cannot be stored for a long time and have unstable ignition performance; the latter uses barium chromate instead, which has improved the disadvantage, but still has the situation that the heating value is insufficient and the oxygen generating system can not be ignited continuously.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an ignition powder for a solid oxygen candle prepared by a chemical precipitation method.
The invention provides a method for preparing an ignition powder for a solid oxygen candle by a chemical precipitation method, which comprises the following steps: mixing the barium salt solution, the chromium source solution and the boron powder for reaction to generate a mixture of barium chromate and the boron powder, and adding the binder after the reaction is finished.
The barium chromate does not have the problems that barium nitrate is easy to absorb moisture and deteriorate and barium peroxide is easy to decompose, but if the barium chromate is directly mixed with fuel mechanically, the barium chromate and the fuel are easy to mix unevenly, so that the ignition performance is affected, and the safety is not easy to guarantee. The invention utilizes the reaction of barium salt solution and chromium source solution to prepare barium chromate, and simultaneously utilizes the property that boron powder is insoluble in the solution, thereby preparing the ignition powder for the oxygen candle with smaller particle size and better ignition performance by a chemical precipitation method. Compared with the existing ignition powder prepared by mixing metal fuel and barium chromate, the ignition performance of the obtained product is obviously better.
According to the preparation method provided by the invention, the barium chromate, the boron powder and the binder are respectively 50-95 parts, 5-30 parts and 1-10 parts by mass.
According to the preparation method provided by the invention, the barium chromate, the boron powder and the binder are 85-95 parts, 5-10 parts and 1-5 parts by mass respectively.
According to the preparation method provided by the invention, the chromium source solution is an aqueous solution of potassium dichromate or sodium chromate, the barium salt solution is an aqueous solution of barium chloride, and the use amount of the two is determined by the use amount of the target barium chromate.
Regarding the mixing of the barium salt solution, the chromium source solution and the boron powder, in some embodiments of the present invention, the boron powder is mixed with the barium salt solution and then mixed with the chromium source solution.
In some embodiments of the invention, the boron powder is mixed with the chromium source solution and then mixed with the barium salt solution.
Further, it is preferable that the solution containing no boron powder is mixed with another solution containing boron powder by dropping. That is, when the boron powder is mixed with the barium salt solution, the chromium source solution is added into the mixed solution of the boron powder and the barium salt solution in a dropwise manner; when the boron powder and the chromium source solution are mixed firstly, the barium salt solution is added into the mixed solution of the boron powder and the chromium source solution in a dropwise manner.
According to the preparation method provided by the invention, the dropping speed is 1-2 ml/min.
According to the preparation method provided by the invention, after the binder is added, the solid-liquid separation is carried out on the mixed material, and the obtained solid is dried and pressed to obtain the oxygen candleAn ignition charge, wherein the pressure of compression is controlled at 0.1-0.2T/cm 2 。
Wherein, the binder can be properly stirred and mixed for a period of time after being added, so that the binder and the materials generated by the reaction are uniformly mixed.
The pressing can be carried out by matching with the structural design in the ignition system, for example, the dried material is pressed in a groove at the top of the oxygen generating grain.
In order to test the ignition performance of the ignition powder at the temperature of minus 40 ℃, the exterior of the ignition powder after being pressed is required to be wrapped with a layer of heat insulation material, and then the ignition powder is frozen at the temperature of minus 40 ℃ for more than 24 hours.
According to the preparation method provided by the invention, the binder is one or more of kaolin, diatomite and silica.
The invention also provides an ignition powder for the solid oxygen candle, which is prepared by any one of the methods.
The invention provides an ignition powder for solid oxygen candles prepared by a chemical precipitation method, which has stronger surface free-running property, more uniform mixing, better ignition performance and stable combustion. The particles after combustion are uniform in size and distribution. Meanwhile, ignition and fire transmission can be realized in the environment of-40 ℃.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the 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.
Unless otherwise specified, the starting materials for the examples of the present invention are commercially available.
Example 1
This embodiment provides an ignition powder for oxygen candle, which has the following formulation:
the preparation method comprises the following steps:
barium chromate was prepared using barium chloride and potassium dichromate as reactants, with 1.7552g of barium chloride and 1.0561g of potassium dichromate being required by calculation.
1.7552g of barium chloride and 1.0561g of potassium dichromate are weighed respectively, dissolved in 7.58ml of water and 10ml of water respectively, and stirred uniformly until the barium chloride and the potassium dichromate are completely dissolved in the water. Then 0.12g of boron powder is weighed, the weighed boron powder and the barium chloride solution which is completely dissolved are poured into a 50ml flask, the flask filled with the barium chloride solution and the boron powder is stirred at the rotating speed of 900r/min, and then the potassium dichromate solution which is prepared in advance is dripped in at the speed of 1 ml/min. With the slow dropping of the potassium dichromate solution, the solution slowly changes from brown to brown-yellow, and a yellowish green precipitate can be observed. After the reaction is fully carried out, 0.06g of kaolin is added into the flask, the mixture is continuously stirred for 1 hour, the mixture is uniformly mixed and filtered, the mixture is dried for half an hour after being filtered, the mixture is taken out and uniformly dispersed and is dried for 1 hour again, and the mixture is dried at the temperature of 0.1T/cm 2 Is pressed in a groove at the top of a homemade oxygen-producing explosive column of 200g under the pressure of the pressure, is wrapped by a heat-insulating material, is frozen in an ultralow temperature freezing test box at the temperature of minus 40 ℃ for more than 24 hours, and is taken out.
Before ignition, the obtained ignition powder is observed, so that the fluidity is relatively good, and the color is comprehensive green.
The post-ignition results were as follows: from the ignition performance, the combustion is uniform, the particle size is uniform after the combustion, and the ignition and the fire transfer can be realized in the low-temperature environment of minus 40 ℃.
Example 2
This embodiment provides an ignition powder for oxygen candle, which has the following formulation:
the preparation method comprises the following steps:
barium chromate was prepared using barium chloride and sodium chromate as reactants, with 1.4960g of barium chloride and 1.1637g of sodium chromate being required by calculation.
1.4960g of barium chloride and 1.1637g of sodium chromate are weighed out and dissolved in 10ml of water and 14ml of water respectively, and the mixture is stirred uniformly until the barium chloride and the sodium chromate are completely dissolved in the water. And weighing 0.1g of boron powder, pouring the weighed boron powder and the completely dissolved barium chloride solution into a 50ml flask, stirring the flask filled with the barium chloride solution and the boron powder at the rotating speed of 1000r/min, stirring for 30 minutes, and then dripping the prepared sodium chromate solution at the speed of 1 ml/min. As the sodium chromate solution was slowly dropped, the solution slowly changed from brown to pale green, and formation of a yellowish green precipitate was observed. After the mixture fully reacts, 0.02g of silicon dioxide and 0.06g of diatomite are added and continuously stirred, the mixture is evenly mixed and filtered, and the mixture is dried for 1 hour and then is put at 0.2T/cm 2 Is pressed in a groove at the top of a homemade oxygen-producing explosive column of 200g under the pressure of the pressure, is wrapped by a heat-insulating material, is frozen in an ultralow temperature freezing test box at the temperature of minus 40 ℃ for more than 24 hours, and is taken out.
Before ignition, the obtained ignition powder is observed, so that the fluidity is relatively good, and the color is comprehensive green.
The post-ignition results were as follows: from the ignition performance, the combustion is uniform, the particle size is uniform after the combustion, and the ignition and the fire transmission can be realized in the low-temperature environment of minus 40 ℃.
Example 3
This embodiment provides an ignition powder for oxygen candle, which has the following formulation:
| chemical name | Number of parts |
| Barium chromate | 85 |
| Boron powder | 10 |
| Kaolin clay | 5 |
The preparation method comprises the following steps:
barium chromate was prepared using barium chloride and potassium dichromate as reactants, with 1.6395g of barium chloride and 0.9864g of potassium dichromate being required by calculation.
1.6395g of barium chloride and 0.9864g of potassium dichromate are weighed respectively, dissolved in 10ml of water and 15ml of water respectively, and stirred uniformly until the barium chloride and the potassium dichromate are completely dissolved in the water. Then 0.2g of boron powder is weighed, the weighed boron powder and the barium chloride solution which is completely dissolved are poured into a 50ml flask, the flask filled with the barium chloride solution and the boron powder is stirred at the rotating speed of 900r/min, and then the potassium dichromate solution which is prepared in advance is dripped in at the speed of 1 ml/min. With the slow dropping of the potassium dichromate solution, the solution slowly changes from brown to brown-yellow, and a yellowish green precipitate can be observed. After the reaction is fully carried out, 0.1g of kaolin is added into the flask, the mixture is continuously stirred for 1 hour, the mixture is uniformly mixed and filtered, the mixture is dried for half an hour after being filtered, the mixture is taken out and uniformly dispersed and is dried for 1 hour again, and the mixture is dried at the temperature of 0.15T/cm 2 Is pressed in a groove at the top of a homemade oxygen-producing explosive column of 200g under the pressure of the pressure, is wrapped by a heat-insulating material, is frozen in an ultralow temperature freezing test box at the temperature of minus 40 ℃ for more than 24 hours, and is taken out.
Before ignition, the obtained ignition powder is observed, so that the fluidity is relatively good, and the color is comprehensive green.
The post-ignition results were as follows: from the ignition performance, the combustion is uniform, the particle size is uniform after the combustion, and the ignition and the fire transfer can be realized in the low-temperature environment of minus 40 ℃.
Example 4
This embodiment provides an ignition powder for oxygen candle, which has the following formulation:
| chemical name | Number of parts |
| Barium chromate | 91 |
| Boron powder | 5 |
| Silicon dioxide | 1 |
| Diatomite | 3 |
The preparation method comprises the following steps:
barium chromate was prepared using barium chloride and sodium chromate as reactants, with 1.4960g of barium chloride and 1.1637g of sodium chromate being required by calculation.
1.4960g of barium chloride and 1.1637g of sodium chromate are weighed out and dissolved in 10ml of water and 14ml of water respectively, and the mixture is stirred uniformly until the barium chloride and the sodium chromate are completely dissolved in the water. And weighing 0.1g of boron powder, pouring the weighed boron powder and the completely dissolved barium chloride solution into a 50ml flask, stirring the flask filled with the barium chloride solution and the boron powder at the rotating speed of 1000r/min, stirring for 30 minutes, and then dripping the prepared sodium chromate solution at the speed of 2 ml/min. With the slow dropping of the sodium chromate solution, the solution slowly changes from brown to light green, andand a yellow-green precipitate was observed to form. After the mixture fully reacts, 0.02g of silicon dioxide and 0.06g of diatomite are added and continuously stirred, the mixture is evenly mixed and filtered, and the mixture is dried for 1 hour and then is put at 0.2T/cm 2 Is pressed in a groove at the top of a homemade oxygen-producing explosive column of 200g under the pressure of the pressure, is wrapped by a heat-insulating material, is frozen in an ultralow temperature freezing test box at the temperature of minus 40 ℃ for more than 24 hours, and is taken out.
Before ignition, the obtained ignition powder is observed, so that the fluidity is relatively good, and the color is comprehensive green.
The post-ignition results were as follows: from the ignition performance, the combustion is uniform, the particle size is uniform after the combustion, and the ignition and the fire transmission can be realized in the low-temperature environment of minus 40 ℃.
Comparative example 1
The comparative example provides an ignition powder for oxygen candle, the formula of which is the same as that of example 1, and the preparation method is as follows:
1.82g of barium chromate was mixed with 0.12g of boron powder and 0.06g of kaolin with stirring, and then it was mixed at 0.1T/cm 2 Is pressed in a groove at the top of a homemade oxygen-producing explosive column of 200g under the pressure of the pressure, is wrapped by a heat-insulating material, is frozen in an ultralow temperature freezing test box at the temperature of minus 40 ℃ for more than 24 hours, and is taken out.
Before ignition, the ignition powder is observed, the fluidity is poor, and the mixing is relatively uneven.
The post-ignition results were as follows: the combustion is uneven, the combustion speed is high and low, and the reliability is poor.
Comparative example 2
The comparative example provides an ignition powder for an oxygen candle, and the formula is as follows:
the preparation method comprises the following steps:
mixing the raw materials under stirring, and then adding the mixture at 0.1T/cm 2 Is pressed under pressure toAnd (4) molding.
As a result: the mixing is uneven, and a certain danger exists when mechanical mixing is adopted for large-scale production, the combustion is uneven, and the combustion speed is high and low.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The method for preparing the solid ignition powder for the oxygen candle by the chemical precipitation method is characterized by comprising the following steps: mixing the barium salt solution, the chromium source solution and the boron powder for reaction to generate a mixture of barium chromate and the boron powder, and adding the binder after the reaction is finished.
2. The method for preparing an ignition powder for a solid oxygen candle by a chemical precipitation method according to claim 1, wherein the mass parts of the barium chromate, the boron powder and the binder are 50-95 parts, 5-30 parts and 1-10 parts respectively.
3. The method for preparing the ignition powder for the solid oxygen candle by the chemical precipitation method as claimed in claim 2, wherein the parts by mass of the barium chromate, the boron powder and the binder are 85-95 parts, 5-10 parts and 1-5 parts respectively.
4. The method of claim 1, wherein the chromium source solution is an aqueous solution of potassium dichromate or sodium chromate, and the barium salt solution is an aqueous solution of barium chloride, and the amounts of the two are determined by the amount of barium chromate to be formed.
5. The method for preparing an ignition charge for a solid oxygen candle by chemical precipitation as claimed in claim 1, wherein the boron powder is mixed with the barium salt solution and then with the chromium source solution;
or mixing the boron powder with the chromium source solution and then mixing with the barium salt solution.
6. The method for preparing an ignition powder for a solid oxygen candle by chemical precipitation as claimed in claim 5, wherein the solution without boron powder is mixed with another solution containing boron powder by dropping during the mixing process.
7. The method for preparing an ignition powder for a solid oxygen candle by chemical precipitation as claimed in claim 6, wherein the dropping speed is 1-2 ml/min.
8. The method for preparing solid igniting powder for oxygen candle by chemical precipitation method according to any one of claims 1-7, characterized in that, after adding binder, the mixture is subjected to solid-liquid separation, the obtained solid is dried and pressed to obtain the solid igniting powder for oxygen candle, wherein the pressing pressure is controlled at 0.1-0.2T/cm 2 。
9. The method for preparing an ignition powder for a solid oxygen candle by a chemical precipitation method as claimed in claim 1, wherein the binder is one or more of kaolin, diatomite and silicon dioxide.
10. An ignition charge for a solid oxygen candle, characterized by being produced by the method of any one of claims 1 to 9.
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| CN202210612700.0A CN114890853A (en) | 2022-05-31 | 2022-05-31 | Ignition powder for preparing solid oxygen candle by chemical precipitation method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4123303A (en) * | 1969-09-19 | 1978-10-31 | Ministry of Technology in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland | Ignitable compositions |
| JPH08109092A (en) * | 1994-10-11 | 1996-04-30 | Nippon Koki Co Ltd | Igniter for fireworks |
| CN108083235A (en) * | 2017-12-29 | 2018-05-29 | 陕西斯达防爆安全科技股份有限公司 | A kind of oxygen candle starting mix and preparation method thereof |
-
2022
- 2022-05-31 CN CN202210612700.0A patent/CN114890853A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4123303A (en) * | 1969-09-19 | 1978-10-31 | Ministry of Technology in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland | Ignitable compositions |
| JPH08109092A (en) * | 1994-10-11 | 1996-04-30 | Nippon Koki Co Ltd | Igniter for fireworks |
| CN108083235A (en) * | 2017-12-29 | 2018-05-29 | 陕西斯达防爆安全科技股份有限公司 | A kind of oxygen candle starting mix and preparation method thereof |
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