علی اکبر رحمانی
استادیار گروه معدن، دانشگاه بین‌المللی امام خمینی، قزوین
[ 1 ] - حذف یون مس از پساب با استفاده از نانوجاذب بنتونیت مگنتیت سنتزشده
هدف اصلی این پژوهش جذب یون‌های فلزی مس از پساب با استفاده از نانوجاذب بنتونیت مگنتیت سنتزشده (20 تا 30 نانومتر) بود. ابتدا نانوجاذب به روش هم‌رسوبی تولید و با روش‌های SEM، XRD و طیف‌سنجی مادون قرمز تبدیل فوریه (FT-IR) آنالیز و ارزیابی شد، سپس به‌عنوان جاذب در تصفیه پساب مورد استفاده قرار گرفت. آزمایش‌ها توسط نرم‌افزار DOE طراحی و ارزیابی شد. مهم‌ترین مشخصه‌هایی که بررسی شدند شامل مقدار جاذب، زم...
[ 2 ] - Simulation and Genetic Algorithms for Optimizing Comminution Circuit at Gol-e-Gohar Iron Plant (RESEARCH NOTE)
simulation optimization is a scientific tool that is widely used to design and optimize comminution circuits in mineral processing plants. In this research, first of all, in order to determine the suitable d80 for cicuit hydrocyclone underflow, the requiremed parameters of simulator (residence time distribution, breakage function, selection function and Plitt’s model calibration) were determin...
[ 3 ] - EFFECT OF TIME-DEPENDENT TRANSPIRATION ON AXISYMMETRIC STAGNATION-POINT FLOW AND HEATTRANSFER OF A VISCOUS FLUID ON A MOVING CIRCULAR CYLINDER
Effect of time dependent normal transpiration on the problem of unsteady viscous flow and heat transfer in the vicinity of an axisymmetric stagnation point of an infinite circular cylinder moving simultaneously with time-depended angular and axial velocities and with time-dependent wall temperature or wall heat flux are investigated. The impinging free stream is steady with a strain rate . A re...
[ 4 ] - Selective Flocculation for Coal De Mineralization
Selective flocculation has long been suggested as a method for the treatment of ultra-fine particles typical of which are those produced in a de-sliming process ahead of flotation. In this paper the results of the coal de-mineralization, using synthetic polyacrylamide polymers, are presented. A prescreening test on the suitability of the polymers using Run-Of-Mine (R.O.M.) coal and artificial m...
[ 5 ] - Effect of Surfactant on Spherical Oil Agglomeration of Coal (RESEARCH NOTE)
In this paper, the results of the Spherical Oil Agglomeration of Abstract .45 micrometer superpits low grade co al pa rticles (Bagworth Colliery, U.K.) within a su spension are prese nte d.Demineralized agglomerates were recovered directly by sieving on a 106 micrometer sieve. Verygood reductions in the ash content of the feed coal samples were achieved. In order to reducethe high levels of the...
[ 6 ] - Spherical Oil Agglomeration (SOA)/ Colloidal Gas Aphrons (CGA) Flotation
The main aim of this experimental work was to develop a separation process using micro- bubbles less than 100 µm in diameter. Micro-agglomerates were produced using 10kg crude oil/tone feed coal treated compared to 250 kg/tone feed coal treated for conventional spherical oil agglomeration. These micro-agglomerates were separated from the unagglomerated minerals by micro-bubble flotation. Colloi...
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