Friday, 30 May 2025

Wednesday, 7 May 2025

proceesing technolgical of minerals sand production based on their phyiscal properties

By Processing technologies of mineral sand production based on their physical charactertic in the pilot plant project, cox,sbazar .

characteristics at pilot plant ,Cox's Bazar

By lftekhar uddin chowdhury,BSMEC, B,A.E.C,Cox,sBazar uddin chowdhury,BSMEC, B,A.EC. Former senior officer, B.A.E.C

Bangldeah atomic energy commission.

.Exploitation of natural resource is essential for sustainable development of the country. N natural resource is wealth and free gift of the country .we have many natural resources We are constantly remain on mineral resource. We are depend on variety of minerals for Our industries at present through out the country as well as world now world rapidly Growing population and environmental degradation arouse concern about the future Sustainability of the society, so we have been undertaken active involvement for accurate information on the significance of mineral resources . advanced modern method Of mineral processing ,operation, and marketing . mineral sand deposits along the coastal Belt of Bangladesh constitute a potential mineral resource of the country .the beach sand mineral contains rutile, which is approximately 95% titanium dioxide and is extensively Used in pigment industries , papers mill rubbers ,cosmetics and manufacture of welding Electrode fluxes manufacture of titanium metal, and aircraft frames, jet engines. Many other purposes. Ilmenite, is also a sources of titanium dioxide . it is the major deposit Of our country .but due to low grade tio2 it is not suitable for up gradation in to synthetic rutile. Ilmenite is also applied in sand blasting , x-ray shielding purpose and titanium stag ,pig iron .Zircon ,whose chemical composition is zirconium silicate, which is extensively used in ceramic industries, foundries refractory and steel mill, electronic application and Mfg of zirconium metal. ,zircon flour is particularly used in higher temperature application and is also applied in t.v plates for protection from harmful xrays garnet, is used as abrasive Mgf of emery paper and cloth. Wheel grinding stone.Kyanite as a source aluminum is used many purpose Magnetite principal source of iron is used in the manufacture of ferrite rods and radiation shielding blocks in the x-ray machine and used in black and red oxide Monazite as a source rare earth which is presences thorium is used for nuclear technology The paper deals with basic process technology of mineral sands recovering in pilot plant from single deposit assemblages including mixture of zircon, rutile garnet, Ilmenitite magnetite Monazite kynaite The process is not so easy it is a vast and complex subject particularly grain size Distribution ,vary for each individual mineral .variation its specific gravity, colors and chemical Composition and variation in magnetic and electrical properties & many other factors. The pilot plant was commissioned 1975 under the administrative control of B.A.E.C. it was Originally designed with the intention of flow sheet development for batch testing and preparing A preliminary feasibility study of mineral sand quality production and ultimately to build up of a Commercial production to exploit of those mineral resources. Basically the entire separation of heavy mineral s in the plant is divided into two categories

1) wet section, Dry section

2) dry section Wet section- this categories of separation consist vast majority of heavy mineral collected after. extraction from light sand on the basis of flotation and wet gravity separation. This gravitational separation is accomplished by wet spiral, gravity and shaking table .depending on grain size specific gravity of sand ,most of the light mineral are rejected with the help of wet slurry by the spiral mechanism . in this regards. 10-35% of heavy mineral may be available. The H.M that is output from the wet spiral is then cleaned in the attritiner in attritiner grain surface is mostly cleaned by hitting and rubbing against other to free the surface coating . the clean concentrate heavy mineral is then passed through low intensity magnetic separation to separate mainly magnetite for magnetite production .the non magnetic is then processed in shaking table the shaking action of the motor and pressure .

Posted: Sun, 07 Mar 2021 11:37:00 +0000

Plant as a regards bulk sample has been tested from cox:s bazaar fore dune sample and small quantity of sample from moheshali, and bodermokam deposit were operated on trial basis in the pilot plant in 1975. ..this operation has been suggested by M.D.L(Australian) on the Finding of these prilimary works of pilot plant .Mr Macdonald (consultant mining engineer of australians)has submitted a report in 1976 to relevant authority the pilot plant was again processed minerals for few month with followed A.MDE1 flow sheets .in the 1977 AMDEL (Australians other consultant firm) they are also submitted report in 1977. on feasibility study of the project .At last BRME has conducted by mineral deposit limited (Australians)in the years 1994-1997.but they did not submit final report as yet. Anyhow. The pilot plant studies are mainly developed flow sheets for physical separation of constituent economic minerals and to find out working economic involved therein which would in turn be in commercial plant to be set up in future .though pilot plant has so far produced 589 ton of ileminite ihnenite with grade. And 580 ton of magnetite with 98.7% grade, &50 ton of zircon , and 20 ton of garnet. & 4 ton of rutitle. Hence pilot plant studies is very essential to carried out for each and every deposit. Because the mineralogy and grain size of the minerals in the all deposit may not be same even they occur along the same stretch of coastline .the potential of economic minerals is 1,76 million ton of our country. Though is it is small deposit to compare to other countries so it is necessary to under taken works for the scope of find additional reserve. The reserve situation must be resolved. As it is prior commitment. Ore reserve estimation must be on adequate data, and accurate. Cost estimation for up date pilot plant operation , and mining now more higher than earlier. As the country has no beach sand mining experience

I have put some suggestion.1 An investigation must be determine economically viable so in order to evaluate valuable heavy minerals reserve accuracy. It should be re calculated by applying most advances modern technique technology method and modern related equipment

2.The existing deposit area should be

environmental impact analysis facilities.

3 Recovery of mineral in the pilot plant production require appropriate parameter determined ,specially rutite and zircon production

4Training facilities of manpower

5 Market survey of all plant production 6 in order to cover /focusing all activities it would be require to set up a conference/seminar with all relevant concerns. 7 Initiative should be taken for electric smelting of ilmenite for titania slag, pig iron production. The pilot plant has designed for the beach sand mining industry, overseas investment for the project to enable to full design. Small Commercial plant but there is not solved the problem. So it is to take conclusion decision after all evaluation of acceptable ensure reserve data by modern advance technology for plan As there no sufficient natural resources of our country Now all efforts should be taken to encouraged Domestic and international .