Collection of ROM Samples, Field (OB n Bauxite) samples, PP drilling samples and its processing for Panchpatmali South Block Bauxite Mine, NALCO, Damanjodi

Amount

Processing of PP drilling & Developmental Drilling Bauxite Samples adopting the following sequential steps: a. Drying up of bauxite samples ( By Industrial oven or sun dry). b. Grinding/Sieving/Reduction of the dried bauxite samples to –120 mesh size (three different stages of grinding,sieving &reduction of sample ) as per instruction of the Engineer-in-charge. c. Preparation and packaging of the representative bauxite samples (two nos of 50gm/100gm each)in polythene bags with label tag and storage of the same sample in the designated racks as per the instruction of the Engineer-in-charge.

Provision of One Unskilled workers for Collection of ROM Sample adopting the following sequential steps as per instruction of the Engineer-in-charge :- a. ROM Sample will be collected in B Shift at sampling platform Provided at South Block opposite to the weigh bridge from the running tippers . b. Collection of sample on hourly / half hourly basis or as per the frequency decided by the department. The total collected sample in a shift thoroughly mixed if required. Boulder may be broken into smaller pieces, reduced the quantity using reffler and keeping it in a bag with proper tag. c. The B Shift Sample shall be carried to sample processing lab on the same day by 9PM in the vehicle provided by NALCO.

Processing of One ROM sample , Collection & Processing of Field Samples(from Ripping Dozing & Backhoe shovel) adopting the following sequential steps on daily basis with two unskilled workers . a. Collection of Field samples from South Block as per requirement including OB and Bauxite Sample and bringing it to the sample processing lab(Departmental vehicle will be provided for sample collection) b. Drying up of the Field sample ( Industrial oven or Sundry). c. Grinding/Sieving/Reduction of the dried bauxite samples to –120 mesh size (three different stages ) as per instruction of the Engineer-in-charge. d. Preparation and packaging of the representative bauxite samples with one duplicate sample for future reference. e. Processed samples are to be handed over to the Alumina Plant Lab for analysis in the same day and to maintain a record of handing over the samples to Alumina plant laboratory. f)The developmental drilling samples will be processed as per the requirement following the same procedure as mentioned above.

Juganto Bagh

M/S SUSANT KUMAR BINOD

PREM PATRA TURUK

ANANTA BAGH

M/S BRAJABANDHU SAUNTA

RAMESH CHANDRA SAUNTA

MAA KANAKA DURGA CONSTRUCTION