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है”ह”ह

IS 2000-1 (1985): Methods of chemical analysis of bauxite,Part 1: Determination of loss on ignition [MTD 13: Ores andRaw Materials]

IS : 2000 ( Part 1 ) - 1985

Indian Standard METHODS OF

CHEMICAL ANALYSIS OF BAUXITE

PART 1 DETERMINATION OF LOSS ON IGNITION

( First Revision )

Methods of Chemical Analysis of Ores, Minerals and R.efractories Sectional Committee, SMDC 35

Chairman

DR L. P. PANDEY

Representing

National Metallurgical Laboratory ( CSIR ), Jamshedpur

Members

Dn V. M. CHOWUHURY ( Alternate to Dr L. P. Pandey )

SHRI G. M. APPA RAO Steel Authority of India Ltd ( Bhilai Steel Plant ), Bhilai

SHRI C. L. SXARMA ( Alternate ) SHI~I J. BANERJEE Steel .4uthority of India Ltd ( Durgapur Steel

Plant ), Durgapur SHRI A. C. MALLICK ( Alternate )

SHRl s. v. BHAQW~T Khandelwal Ferro Alloys Ltd, Khandelwal Nagar SHRI D. N. GUPTA ( Allernafe )

SHRI P. BHATTACHARYA Belpahar Refractories Ltd, Belpahar S>ic;nr P. V. RAO ( Alternate )

SHRI P. K. GH~SAL Kumardhubi Fireclay and Silica Works Ltd, Kumardhubi

SHRI L. N. BANEIIJEE ( Alternate ) SHRI N. B. GUDE Chowgule & Co Pvt Ltd, Marmugao Harbour SHRI S. S. HONAVAR Italab Pvt Ltd, Madras

SHRI M. V. DAHHOLT~~\R ( Alternate I ) SHRI J. C. DEY ( Alternule II )

DR C. S. P. IYER Chairman, SMDC 2 ( Bhabba Atomic Research Centre, Bombay )

SHRI J. R. K. MUILTIIY Harry Refractories & Ceramic Works Pvt Ltdr, Calcutta

SHRI N. C. SARA ( Alternate ) DR A. PURUSOTTAM Geological Survey of India, Calcutta SHRI M. RAE National Test House, Calcutta

SHRI A. K. DU~TA GUPTA ( Alternate )

( Continued on page 2 )

@ Copyrighr 1986

INDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyrighf Act ( XIV of 1557 ) ano reproduction in whole or in part by any means except with written permission of tht publisher shall be deemed to be an infringement of copyright under the said Act.

IS : 2000 ( Part 1) - 1985

( Continued from page 1 )

Members Representing

Dn J. RAJARAM Essen & Co, Bangalore Srmr K. RAMA KRISBN.\ ( Alternate )

Srrn~ G. RAJA Rao Ferro Alloys Corporation Ltd, Shreeramnagar SIIRI D. V. RAMAN National Mineral Development Corporation Ltd,

Hydcrabad SRRJ N. VEXATRAMAN ( Alternate )

SIIRI I(. SY>1M>\Lh RAO Mineral Exploration Corporation Ltd, Nagpur Drc B. C. SIN!iA Central Glass & Ceramic Research Institute

( CGCRI ), Calcutta SHRI S. Das GUPTA ( Alternafe )

DR Y; P. SRIVASTAVA The ‘rata Iron & Steel Co Ltd, Jamshedpur DR K. S. R. KRISHNAIAII ( Alternate )

SIII~I B. N. ?‘:icoo Department of Atomic Energy, Hyderabad Dn Cu VINICAWSWARLU Chairman, SMDC 34 ( Bhabha Atomic Research

Centre, Bombay ) SHRI K. ~~~~~~~~~~~~~~~~~

Director ( Strut & Met ) Director General, IS1 ( Ex-ogicio Member )

Secretor ies

SHKI JAGMOHAN SINGH Deputy Director ( Metals ), IS1

SRRI M. L. SHAI~MA Assistant Director ( Metals ), ISI

2

IS : 2000 ( Part 1) - 1985 .

Indian Standard METHODS OF

CHEMICAL ANALYSIS OF BAUXITE

PART 1 DETERMINATION OF LOSS ON IGNITION

( First Revision )

0. FOREWORD

0.1 This Indian Standard ( Part 1 ) ( First Revision ) was adopted by the Indian Standards Institution on 24 December 1985, after the draft finalized by the Methods of Chemical Analysis of Ores, Minerals and Refractories Sectional Committee had been approved by the Structural and Metals Division Council.

0.2 IS : 2000-1962” which covered determination of loss on ignition; total silica, non-reactive and reactive silica; alumina; ferric oxide by dichromate method, permanganate and calorimetric methods; titania by reduction ( volumetric ) and calorimetric methods; phosphorus; calcium oxide; magnesium oxide and manganous oxide was first published in 1962. While reviewing this standard the Sectional Committee felt the need for the revision of this standard. On the basis of experience gained during these years, the Committee decided to revise this standard into different parts covering determination of each element in separate part, which on publication would supersede that element given in IS : 2000- 1962*. This part covers determination on loss of ignition. The other parts are:

Part 2 Determination of silica ( as SiOa, 0.5 to 10.0 percent )

Part 3 Determination of alumina

Part 4 Determination of ferric oxide

Part 5 Determination of titania ( 0.5 to 12.0 percent )

Part 6 Determination of vanadium ( V < 0.1 percent )

Part 7 Determination of phosphorus pentoxide ( PzO, < 0.5 percent )

Part 8 Determination of manganous oxide ( MnO < 0.5 percent)

The procedures for determination of CaO and MgO in bauxite are at present under investigation and will be given in subsequent part.

*Methods of chemical analysis of bauxite.

3

IS : 2000 ( Part 1 ) - 1985

0.3 In preparation of this revision due consideration has been given to the facilities available in the country to carry out such analysis.

0.4 In reporting the results of a test or analysis made in accordance with this standard, if the final value, observed or calculated, is to be rounded off, it shall be done in accordance with IS : 2-1960*.

1. SCOPE

1.1 This standard ( Part 1 ) prescribes method for determination of loss on ignition in bauxite.

2. SAMPLING

2.1 Laboratory Sample - Use a truly representative and homogenous sample drawn in accordance with IS : 1999-1962f. Grind sufficient quantity of this sample as required for analysis in an agate mortar.

2.2 Test Sample - Grind 5 to 10 g of the laboratory sample, as given in 2.2.1 to pass 150 pm IS sieve [ see IS : 460 ( Part 1 )-1985$ 1. Dry to constant mass at 110 f 2°C and use it for the purpose of chemical analysis.

2.2.1 Prepare at least 5 times as much sample as is needed, and make sure that all the powder is included; it is not admissible to take only the powder that passes through the sieve the first time. Mix well by rolling on a sheet of glazed paper, rubber or oil-cloth.

2.2.2 Lift a corner of the sheet and draw across, low down, in such a way that the material is made to roll over and over and does not merely slide along. Roll the sample back and forth. along each diagonal for 100 times or more. Spread out the sample into squares and take a little from each square. Finally mix the sample chosen.

NOTE - Care should be taken as not to grind the sample too much in one time. Too frequent sifting through silk bolting cloth should be avoided in order to prevent contamination of the sample by abrasion and also loss of moisture due to the heat of grinding.

3. QUALITY OF REAGENTS

3.1 Unless specified otherwise, analytical grade reagents and distilled water shall be employed in the test.

*Rules for rounding off numerical values ( revised ). iMethods of sampling bauxite. $Specification for test sieves: Part 1 Wire cloth test sieves ( third revision ).

4

IS : 2000

4. DETERMINATION OF LOSS ON IGNITION

4.1 Reagent

4.1.1 Magnesium Perchlorate ( Anhydrous ) - salid.

4.2 Procedure -- \Veigh accurately 1.00 g-of sample ._

( Part 1 ) - 1985

( s_ce 2.2 j into a previously weigher1 p!atinum crucible. bleat slo\~iy first, then at a gradually increasing temperature. Finally ignite at 1 000°C for one hour. Cool in a desiccator containing preferably magnesium perchlorate and weigh. Repeat the heating till constant weight.

4.3 Calculation

Loss on ignition = c A--B x 100

where

A =- initial mass in g of the crucible with sample,

B = final mass in g of crucible with residue after ignition, and

C = mass in g of the sample taken.

5

INTERNATIONAL SYSTEM OF UNITS ( SI UNITS)

Base Units

QUANTITY

Length

Mass

Time

Electric current

Thermodynamic temperature

Luminous intensity

Amount of substance

Supplementary Units

QUANTITY

Plane angle

Solid angle

Derived Units

QUANTITY

Force

Energy

Power

Flux

Flux density

Frequency

Electric conductance

Electromotive force

Pressure, stress

UNIT

metre

kilogram

second

ampere

kelvin

candela

mole

UNIT

radian

steradian

UNIT

newton

joule

watt

weber

tesla

hertz

siemens

volt

pasca 1

SYMBOL

m

kg s

A

K

cd

mol

SYMBOL

rad

sr

SYMBOL

N

J W

Wb

T

HZ

S

V

Pa

DEFINITIOS

1 N = 1 kg.m/s*

1 J = 1 N.m

1 W = 1 J/s

1 Wb = 1 V.s

1 T = 1 Wb/m’

1 Hz = 1 c/s (s-l)

1 S = 1 A!V

1 V = 1 W/A

1 Pa-1K’m’