Application of multielement class-D dry powder extinguishing agent in extinguishment of metallic magnesium and metallic sodium fires
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A technology of dry powder fire extinguishing agent and metal magnesium, which is applied in fire rescue and fire prevention equipment to achieve the effects of fast cooling, good electrical insulation and stable chemical properties
Active Publication Date: 2014-04-30
山东环绿康新材料科技有限公司
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Embodiment 1
[0045] The used blocking agent hydrophobic silica, sodium silicate, kaolin or zeolite is commercially available, and its particle size is 10-100 μm;
[0046] The filler potassium chloride used, diatomaceous earth, talcum powder or calcium carbonate are commercially available, and its particle size is 10~100 μ m;
[0047] The catalyst starch, cellulose or pentaerythritol used are commercially available, and the particle size is 10-20 μm.
[0048] Raw material consumption
[0049] Modified sodium chloride 50kg
[0050] Hydrophobic silica 30kg
[0051] Potassium chloride 10kg
[0052] Starch 5kg
[0053] The hydrophobic silica used is chemically modified by dimethyldichlorosilane monomer, or physically modified by mixing with polymethylsiloxane;
[0054] Its preparation method steps are as follows:
[0055] ⑴Add the silica powder to the modified sodium chloride and mix evenly in the airflow with a pressure of ≥0.5MPa, and set aside;
[0056] (2) Add the remaining fillers a...
Embodiment 2
[0070] Raw material consumption
[0071] Modified sodium chloride 40kg
[0072] Sodium silicate 20kg
[0073] Diatomaceous earth 5kg
[0074] Starch 1kg
[0075] All the other are with embodiment 1.
Embodiment 3
[0077] Raw material consumption
[0078] Modified sodium chloride 50kg
[0079] Kaolin 30kg
[0080] Talc powder 10kg
[0081] Cellulose 5kg
[0082] All the other are with embodiment 1.
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Abstract
The invention relates to an application of a multielement class-D dry powder extinguishing agent in extinguishment of metallic magnesium and metallic sodium fires. According to experimental models, test procedures and test requirements on the basis of the requirements of A979-2012 'Class-D Dry Powder Extinguishing Agent', fire-extinguishing tests on the burning metallic magnesium dry scraps, metallic magnesium dry powder, oil-immersed metallic magnesium scraps and oil-immersed metallic magnesium powder or metallic sodium are carried out by using the multielement class-D dry powder extinguishing agent, wherein the fire-extinguishing success rate reaches 100%. The examination result after the spraying of the multielement class-D dry powder extinguishing agent shows that the fire-extinguishing time is less than 3 minutes, the fire-extinguishing effectiveness is less than 20Kg/m<2>, the surface temperature of the metallic magnesium and the metallic sodium after the fire extinguishing is measured to be decreased below 48 DEG C and the surface temperature of the metallic magnesium dry scraps after the fire extinguishing is decreased below 130 DEG C. After the multielement class-D dry powder extinguishing agent is sprayed for 2 hours, if reaction residues of the metallic magnesium and the metallic sodium after the metallic magnesium and the metallic sodium are burnt out, which are turned over and stirred, cannot burn again, the fire-extinguishing application is successful.
Description
technical field [0001] The invention belongs to the technical field of fire extinguishing agent application, and in particular relates to the application of a multi-component D-type dry powder fire extinguishing agent in extinguishing metallic magnesium and metallic sodium fires. Background technique [0002] Class D fires refer to metal fires, such as potassium, sodium, magnesium, titanium, zirconium, lithium, aluminum-magnesium alloy fires, etc. [0003] With the continuous development of technology, the raw materials and procedures of industrial production have made great progress compared with the past. First, it is no longer limited to the use of raw materials such as steel, wood and masonry, and special metals such as titanium, magnesium, sodium and lithium. Raw materials have also become a very important part of people's lives; secondly, in terms of production technology, the widely used computer control and automatic grinding machinery have made production achieve hi...
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