Runzhi Li , Yinghui Zhang , Mengting Cao , Xu Chen , Xiao Liu , Kaiyue Jia , Mingshuai Liu , Dechen Wang , Xiao Wang , Caihua Shi
{"title":"气固两相复合体系对铝尘爆炸的惰性作用研究","authors":"Runzhi Li , Yinghui Zhang , Mengting Cao , Xu Chen , Xiao Liu , Kaiyue Jia , Mingshuai Liu , Dechen Wang , Xiao Wang , Caihua Shi","doi":"10.1016/j.powtec.2025.121250","DOIUrl":null,"url":null,"abstract":"<div><div>The occurrence of aluminum dust explosion accidents, seriously damages the security of people's lives and property, restricting the healthy and sustainable development of related industries. To prevent the occurrence of aluminum dust explosion accidents, this study investigates the effects of three solid inert agents (Al<sub>2</sub>O<sub>3</sub>, NaH<sub>2</sub>PO<sub>4</sub>, Mg(OH)<sub>2</sub>), two gas inert agents (CO<sub>2</sub>, N<sub>2</sub>), and gas-solid two-phase inert agents on the explosion characteristics of aluminum dust and reveals the inert mechanism. The results demonstrated that the Minimum Significant Inert Concentration of Al<sub>2</sub>O<sub>3</sub>, NaH<sub>2</sub>PO<sub>4</sub>, and Mg(OH)<sub>2</sub> for aluminum dust explosion were 170 %, 150 %, and 90 %, respectively, and the Minimum Complete Inert Concentration for aluminum dust explosion were 300 %, 290 %, and 350 %, respectively. When the inert concentration is lower than 150 %, the inert effect is Mg(OH)<sub>2</sub>, NaH<sub>2</sub>PO<sub>4</sub>, and Al<sub>2</sub>O<sub>3</sub> in descending order. When the inert concentration is higher than 150 %, the inert effect was NaH<sub>2</sub>PO<sub>4</sub>, Al<sub>2</sub>O<sub>3</sub>, and Mg(OH)<sub>2</sub> in descending order. For the same gradient of inert volume fraction, the decrease in the explosion pressure of aluminum dust is greater under CO<sub>2</sub> than under N<sub>2</sub>. However, the inert effect is achieved by consuming large quantities of highly concentrated gas inert agents. The addition of gas-solid two-phase inert agents has a synergistic inert effect on the explosion pressure and pressure rise rate, which reduces the amount of solid inert agent and gas inert agent added. The inert mechanism of inert substances in the explosion of aluminum dust is dominated by physical inert. The study results will have important theoretical guidance for dust explosion protection.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"464 ","pages":"Article 121250"},"PeriodicalIF":4.6000,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study on the inert effect of gas-solid two-phase composite system on aluminum dust explosion\",\"authors\":\"Runzhi Li , Yinghui Zhang , Mengting Cao , Xu Chen , Xiao Liu , Kaiyue Jia , Mingshuai Liu , Dechen Wang , Xiao Wang , Caihua Shi\",\"doi\":\"10.1016/j.powtec.2025.121250\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The occurrence of aluminum dust explosion accidents, seriously damages the security of people's lives and property, restricting the healthy and sustainable development of related industries. To prevent the occurrence of aluminum dust explosion accidents, this study investigates the effects of three solid inert agents (Al<sub>2</sub>O<sub>3</sub>, NaH<sub>2</sub>PO<sub>4</sub>, Mg(OH)<sub>2</sub>), two gas inert agents (CO<sub>2</sub>, N<sub>2</sub>), and gas-solid two-phase inert agents on the explosion characteristics of aluminum dust and reveals the inert mechanism. The results demonstrated that the Minimum Significant Inert Concentration of Al<sub>2</sub>O<sub>3</sub>, NaH<sub>2</sub>PO<sub>4</sub>, and Mg(OH)<sub>2</sub> for aluminum dust explosion were 170 %, 150 %, and 90 %, respectively, and the Minimum Complete Inert Concentration for aluminum dust explosion were 300 %, 290 %, and 350 %, respectively. When the inert concentration is lower than 150 %, the inert effect is Mg(OH)<sub>2</sub>, NaH<sub>2</sub>PO<sub>4</sub>, and Al<sub>2</sub>O<sub>3</sub> in descending order. When the inert concentration is higher than 150 %, the inert effect was NaH<sub>2</sub>PO<sub>4</sub>, Al<sub>2</sub>O<sub>3</sub>, and Mg(OH)<sub>2</sub> in descending order. For the same gradient of inert volume fraction, the decrease in the explosion pressure of aluminum dust is greater under CO<sub>2</sub> than under N<sub>2</sub>. However, the inert effect is achieved by consuming large quantities of highly concentrated gas inert agents. The addition of gas-solid two-phase inert agents has a synergistic inert effect on the explosion pressure and pressure rise rate, which reduces the amount of solid inert agent and gas inert agent added. The inert mechanism of inert substances in the explosion of aluminum dust is dominated by physical inert. The study results will have important theoretical guidance for dust explosion protection.</div></div>\",\"PeriodicalId\":407,\"journal\":{\"name\":\"Powder Technology\",\"volume\":\"464 \",\"pages\":\"Article 121250\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2025-06-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Powder Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S003259102500645X\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S003259102500645X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Study on the inert effect of gas-solid two-phase composite system on aluminum dust explosion
The occurrence of aluminum dust explosion accidents, seriously damages the security of people's lives and property, restricting the healthy and sustainable development of related industries. To prevent the occurrence of aluminum dust explosion accidents, this study investigates the effects of three solid inert agents (Al2O3, NaH2PO4, Mg(OH)2), two gas inert agents (CO2, N2), and gas-solid two-phase inert agents on the explosion characteristics of aluminum dust and reveals the inert mechanism. The results demonstrated that the Minimum Significant Inert Concentration of Al2O3, NaH2PO4, and Mg(OH)2 for aluminum dust explosion were 170 %, 150 %, and 90 %, respectively, and the Minimum Complete Inert Concentration for aluminum dust explosion were 300 %, 290 %, and 350 %, respectively. When the inert concentration is lower than 150 %, the inert effect is Mg(OH)2, NaH2PO4, and Al2O3 in descending order. When the inert concentration is higher than 150 %, the inert effect was NaH2PO4, Al2O3, and Mg(OH)2 in descending order. For the same gradient of inert volume fraction, the decrease in the explosion pressure of aluminum dust is greater under CO2 than under N2. However, the inert effect is achieved by consuming large quantities of highly concentrated gas inert agents. The addition of gas-solid two-phase inert agents has a synergistic inert effect on the explosion pressure and pressure rise rate, which reduces the amount of solid inert agent and gas inert agent added. The inert mechanism of inert substances in the explosion of aluminum dust is dominated by physical inert. The study results will have important theoretical guidance for dust explosion protection.
期刊介绍:
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.