The suppression characteristic and chemical reaction mechanism of calcium carbonate and sodium bicarbonate powder on sulfurous iron ore dust explosions

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-07-19 DOI:10.1016/j.powtec.2025.121438

Changshun Tian , Gang Su , Yunzhang Rao

{"title":"The suppression characteristic and chemical reaction mechanism of calcium carbonate and sodium bicarbonate powder on sulfurous iron ore dust explosions","authors":"Changshun Tian , Gang Su , Yunzhang Rao","doi":"10.1016/j.powtec.2025.121438","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigated the suppression effects and underlying mechanisms of calcium carbonate (CaCO3) and sodium bicarbonate (NaHCO3) as solid powder suppressants on sulfurous iron ore dust explosions using a self-designed comprehensive thermal analysis method. Results showed that both CaCO3 and NaHCO3 effectively suppressed sulfurous iron ore dust explosions. However, at NaHCO3 mass fractions of ≤20 %, a slight increase in explosion pressure, termed the suppressant enhanced explosion parameter (SEEP) phenomenon, was observed. CaCO3 primarily suppressed explosions through thermal insulation and heat absorption, while NaHCO3 achieved suppression through heat absorption, which generated H2O and CO2, diluting oxygen concentrations, as well as through chemical effects involving sodium atoms (Na·), sodium ions (Na+), or sodium compounds participating in the sulfurous iron ore dust explosion reactions. These findings provide a theoretical basis for selecting effective suppressants for sulfurous iron ore dust explosions.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"466 ","pages":"Article 121438"},"PeriodicalIF":4.6000,"publicationDate":"2025-07-19","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/S0032591025008332","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}

引用次数: 0

Abstract

This study investigated the suppression effects and underlying mechanisms of calcium carbonate (CaCO₃) and sodium bicarbonate (NaHCO₃) as solid powder suppressants on sulfurous iron ore dust explosions using a self-designed comprehensive thermal analysis method. Results showed that both CaCO₃ and NaHCO₃ effectively suppressed sulfurous iron ore dust explosions. However, at NaHCO₃ mass fractions of ≤20 %, a slight increase in explosion pressure, termed the suppressant enhanced explosion parameter (SEEP) phenomenon, was observed. CaCO₃ primarily suppressed explosions through thermal insulation and heat absorption, while NaHCO₃ achieved suppression through heat absorption, which generated H₂O and CO₂, diluting oxygen concentrations, as well as through chemical effects involving sodium atoms (Na·), sodium ions (Na⁺), or sodium compounds participating in the sulfurous iron ore dust explosion reactions. These findings provide a theoretical basis for selecting effective suppressants for sulfurous iron ore dust explosions.

Abstract Image

查看原文本刊更多论文

碳酸钙和碳酸氢钠粉末对含硫铁矿粉尘爆炸的抑制特性及化学反应机理

采用自行设计的综合热分析方法，研究了碳酸钙（CaCO3）和碳酸氢钠（NaHCO3）作为固体粉末抑制剂对含硫铁矿粉尘爆炸的抑制效果及其机理。结果表明，CaCO3和NaHCO3均能有效抑制含硫铁矿粉尘爆炸。然而，在NaHCO3质量分数≤20%时，爆炸压力略有增加，称为抑制剂增强爆炸参数（SEEP）现象。CaCO3主要通过保温和吸热抑制爆炸，NaHCO3主要通过吸热产生H2O和CO2，稀释氧气浓度，以及参与含硫铁矿粉尘爆炸反应的钠原子（Na·）、钠离子（Na+）或钠化合物的化学作用来抑制爆炸。这些研究结果为选择有效的硫铁矿粉尘爆炸抑制剂提供了理论依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

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.