Mines and Minerals Reporter :: January' 2006 Issue

View of December' 2006 -
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Adsorption of Copper and Cadmium on Calcined Aluminium Hydroxide Prepared from Waste Aluminium Dross
Barsha Dash, B.C.Tripathy and I.N.Bhattacharya
Regional Research Laboratory(CSIR), Bhubaneswar, Orissa, India

ABSTRACT
The present study focused on the use of calcined aluminium hydroxide prepared from aluminium dross for adsorption of Cu(II) and Cd(II) species. Aluminium dross is generally a waste material and need proper treatment before its disposal. At RRL Bhubaneswar a process was developed to treat such material for producing aluminium hydroxide. The study showed that the calcined aluminium hydroxide products are very good adsorbent for Cu(II) and Cd(II) adsorption. Almost 100% adsorption of Cd(II) was noticed when the solution was treated at room temperature but the adsorption reduced when treated at elevated temperatures. Cu(II) adsorption was found to be around 65% at room temperature but it increased to 98% when the temperature of the solution was raised to 45ºC.

Assessment Of Soil Pollution Index And Soil Infiltration Rates In Some Non-Fire And Fire Areas Of Jharia Coalfield
Dr. D.P. Tripathy, Asst. Professor, Dept. of Mining Engineering, N.I.T., Rourkela
Dr. Gurdeep Singh, Professor and Head, Centre of Mining Environment, I.S.M., Dhanbad
Prof. D.C. Panigrahi, Professor , Dept. of Mining Engineering, I.S.M., Dhanbad

ABSTRACT
Jharia coalfield is a major source of prime coking coal in India. This coalfield has witnessed unparalleled fire problems since 1916 affecting seams IV to XVII. At present there are as many as 65 active mine fires spread over 17.32 sq. km area affecting the micro and macro environment adversely. The impacts of mine fires have been noticed on all segments of environment viz. air, water and land. This paper discusses the variations in trace elements concentration in top soil and soil infiltration rates in some fire affected coal mines vis-à-vis areas not affected by it. Soil pollution index was also calculated for each of the study areas taking into consideration the critical soil concentration of different trace elements.

China Clay Mining And Processing In Orissa
Ranjita Swain, U. S. Nandigrami and R. Bhima Rao
Suvochem Ind. Pvt. Ltd., Jagatpur, Cuttack
Regional Research Laboratory, Bhubaneswar

ABSTRACT
China clay is an important raw material found throughout the state of Orissa, specially concentrated in Khurda, Koraput, Mayurbhanja and Sundergarh districts. Centralized washing plant in Joshipur area of Mayurbhanj districts processes around 1, 50,000 tonnes of crude clay (which can yield around 45-50,000 tonnes of washed clay and 1, 00,000 tonnes of silica sand) with hydrocyclone technique and calcinations facilities. However the mining practice is unorganized throughout state. Most of the mine owners are selectively mining the high grade china clay and leaving about 90% of crude clay in the mine as reject. Hence there are many opportunities to recover high grade clay from different types of clay deposits as well as from mine rejects of Orissa. This paper deals with the types of ores, specifications, resources, production, alternative materials for kaolin based industries, processing and economics.

Outlook for Coal in the Tenth Five Year Plan period (2002-07)
By Our News Bureau

ABSTRACT
Coal Demand: Working Group on Coal & Lignite for formulation of Tenth Five Year Plan, constituted by Planning Commission has assessed country’s raw coal demand in 2006-07, the terminal year of the 10th Plan at 453.29 million tonnes (including of middlings). While the Planning Commission assessed the All India Coal demand at 460.50 MT. (5.24 mt middlings). To meet this demand, Working Group on Coal & Lignite for formulation of Tenth Five Year Plan has indicated an indigenous coal production of 399.73 million tonnes (CIL=350.00 m.t. SCCL=36.13 m.t. and Others=13.60 m.t. including Meghalaya Coal) but later on finalised an indigenous coal production of 405.00 million tonnes (CIL=350.00 m.t. SCCL=36.13 m.t. and Others=18.87 m.t. including Meghalaya Coal) for the same period. However, during the Mid Term Appraisal, All India coal demand has been revised to 473.18 MT and indigenous coal production has been assessed at 431.50 MT by the Planning Commission.
The demand for the terminal year of the Xth Five Year lan, as projected by the Working Group originally assessed and revised during Mid Term Appraisal (MTA) by the Planning Commission is shown in the table.

What is Clean Coal Technology?
Dr. D.P. Tripathy, Asst. Professor, Dept. of Mining Engineering, N.I.T., Rourkela
Dr. Gurdeep Singh, Professor and Head, Centre of Mining Environment, I.S.M., Dhanbad
Prof. D.C. Panigrahi, Professor , Dept. of Mining Engineering, I.S.M., Dhanbad

ABSTRACT
The term “Clean Coal Technology” (CCT) describes a new generation of processes for the production of electricity and fuels from coal. CCTs are designed to increase the energy efficiency and to reduce the environmental effects of coal use. CCTs reduce air emissions, waste products and other pollutants compared to older coal-based systems, and increase the amount of energy gained from each ton of coal used.