Research And Application Of Process Improvement Of Dust Removal System In A Mineral Processing Plant

With the rapid development of our national economy,while paying attention to economic growth,our country pays more and more attention to environmental protection and laborer’s health.Mineral processing in the process of crushing,screening and other operations will produce a large number of dust,industrial dust is the production environment,the main occupational disease-inducing factors,in the ore process site and surrounding directly endanger the staff’s health.This paper sums up the advantages and disadvantages of the existing dedusting technology,and makes an upgrade plan for the actual situation of the mineral processing plant concentrator.The dust infiltration characteristics,the resting angle and the dispersion degree of the mineral processing plant concentrator were measured by means of experiments.The results are as follows: The infiltration rate is 1.6 mm/min,which indicates that the dust of The mineral processing plant concentrator belongs to hydrophobic granules,the dust particle’s resting angle is 27.2°,and the dust particle fluidity of the surface Qi Dashan concentrator is better and the dust dispersion is relatively low.According to the characteristics of the dust in The mineral processing plant concentrator,the dust removal by sprinkling dust was determined in the crushing and sieving area,and the structure and performance of the spray atomizer in The mineral processing plant concentrator were studied.The CFD modeling of the spray nozzle of the sprinkler and dust reduction system is used for numerical simulation research.It is found that the incident water pressure and the nozzle diameter have a great influence on the nozzle spray effect.The larger the incident water pressure,the better the atomization effect and the larger the nozzle diameter.The better the atomization effect,in actual work,combined with the needs of the actual situation,based on the principle of minimum water consumption and the best dust reduction effect,the working conditions and nozzle design parameters are selected so that the nozzle spray dust reduction operation runs efficiently.Further experimental research results show that:(1)as the pressure increases,the flow of the nozzle decreases and the water pressure increases,and the influence of the flow on the pressure becomes smaller.(2)with the increase of air pressure,the air flow is increased linearly,and the pressure increases with the increase of gas flux.(3)When the current reaches a certain value,the average particle size of the droplet decreases with the increase of airflow.When the gas flow is a certain value,the larger the flow,the greater the average size of the fog.When the flow rate is less than 1×10-5 m~3/s,the airflow is larger than the 50×10-5 m~3/s,the average particle size of the atomized droplets will be less than 10 microns,which can meet the requirements of the dedusting design of the concentrator.In this paper,the method of installing swirl baffle,spraying system and air mist device for collecting dust is improved in venturi wet dedusting equipment.By calculating the pressure reduction value of the system,the total energy consumption of the system is Et=2 kw/1000m~3,the dust removal efficiency of the ?P=2430.65 Pa system can reach 98%.Through the research,finally we can make the beneficiation work post dust concentration ≤1mg/m~3,dust collector export concentration ≤15mg/m~3.Finally,the component estimation and overall design of the dust removal system are carried out.Through technical renovation,we improve the backward production technology,eliminate the serious pollution production equipment,reduce the dust pollution in the beneficiation production,purify the working environment and realize clean production.