首页|极寒地区室内矿石转运产尘密封净化性能研究

极寒地区室内矿石转运产尘密封净化性能研究

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极寒地区选矿车间密闭性强,室内矿石转运环节产尘聚集度高,威胁作业人员职业健康和电器设备运行安全.以我国东北某金属矿磨浮车间矿石转运过程为例,在研究矿石粉尘理化特性的基础上,提出了新型导料槽密闭抽尘与气液卷吸除尘器除尘协同的粉尘控制方案,研究了导料槽密闭抽尘系统对转运扬尘的封闭性能,探讨了气液卷吸除尘器对收集的含尘气流的净化能力.结果表明:钼矿石转运点外逸粉尘粒径集中分布于 0.2～3.0 μm,且具有较强的亲水性,游离二氧化硅含量高达 48.6%,属于矽尘范畴;导料槽密闭抽尘系统在过料口风幕隔离和导流作用下,有效抑制了转运点粉尘外逸,转运点附近全尘和呼尘浓度较使用前分别下降了 61.1%和 50.0%;气液卷吸除尘器在剪切液幕和卷吸气泡 2 种流型下具有较好的除尘效果,对转运点钼矿石粉尘的除尘效率可达 92.8%～96.3%.研究成果和现场实施经验可为我国北方极寒地区封闭车间粉尘治理提供有益借鉴.
Study on Sealing and Purification Performance of Indoor Ore Transfer Dust in Extremely Cold Area
The air tightness of the mineral processing workshop in extremely cold areas and the high degree of dust accu-mulation in the indoor ore transfer link threaten the occupational health of operators and the operation safety of electrical equip-ment.This paper takes the ore transfer process of a metal ore grinding workshop in northeast China as an example.Based on the study of the physical and chemical properties of ore dust,a new type of dust control scheme between the closed dust removal of the guide trough and the dust removal of the gas-liquid coil suction dust collector is proposed.The closed performance of the closed dust removal system of the guide trough on the transfer of dust,and the purification ability of the gas-liquid coil suction dust collector on the collected dust-containing air flow is discussed.The results show that the particle size of the dust escaping from the molybdenum ore transfer point is concentrated and distributed between 0.2~3.0 μm,and it has a strong hydrophilici-ty,and the content of free silica is as high as 48.6%,which belongs to the category of silicon dust;the closed dust extraction system of the guide trough effectively inhibits the escape of dust from the transfer point under the isolation and diversion of the air curtain at the feed port,and the concentration of dust and exhaled dust near the transfer point decreased by 61.1%and 50.0%respectively compared with before use;the gas-liquid roll suction dust collector has good dust removal under the two flow types of shear liquid curtain and roll suction bubble.The effect is that the dust removal efficiency of molybdenum ore dust at the transfer point can reach 92.8%~96.3%.The study results and on-site implementation experience can provide useful ref-erence for dust control in closed workshops in extremely cold area of Northern China.

extremely cold areamineral processing planttransfer dustclosed dust extraction of material guide groovegas-liquid roll suction and dust removal

朱国燕、卜步龙、张龙、姚溪蕊、魏涛、李小川

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伊春鹿鸣矿业有限公司,黑龙江 伊春 152500

中国矿业大学化工学院,江苏 徐州 221116

中国安全生产科学研究院,北京 110012

极寒地区 选矿厂 转运产尘 导料槽密闭抽尘 气液卷吸除尘

国家自然科学基金项目江苏省重点研发计划项目中铁资源重点研究项目

52003292BE2019641LMGS-09G001L2

2024

10.19614/j.cnki.jsks.202407029

金属矿山
中钢集团马鞍山矿山研究院 中国金属学会

金属矿山

CSTPCD北大核心
影响因子：0.935
ISSN：1001-1250
年,卷(期)：2024.(7)