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है”ह”ह

IS 1751 (1984): Fireclay cupola refrectories [MTD 15:Refractories]

tS: 1351 - 19&d

Indian Standard

SPECIFICATION FOR FIRECLAY CUPOLA REFRACTORIES

( Second Revision)

Refractories Sectional Committee, SMDC 18

Chnirmnn SEBI I. C. MODI

Members

Representing Steel Authority of India Ltd ( Rourkela Steel

Plant ), Rourkela

SHBI R. K. SAN~HI ( Altcrnatc to Shri I. C. Modi )

Snar P. S. V. ANANTEANARAYANA Engineering & Mineral Industrial Research Laboratory, Bangalore

SHSI D. N. BANERJEE Indian Iron & Steel Co Ltd, Bumpur SEEI A. K. MUKHERJEE ( Alternate )

DR G. BANERJEE Central Glass & Ceramic Research Institute ( CSIR ), Calcutta

SH~I BHARAT BHASKAR Ishwar Industries Ltd, New Delhi SHRI RAJEEV BHASKAR ( Alternnte )

DR A. K. CHA’ITERJEI The Associated Cement Companies Ltd, Bombay SHRI S. K. BISWAS ( AIternatc )

SH~I S. K. CHATTERJEE Steel Authority of India Ltd ( Durgapur Steel Plant ), Durgapur

SHRI S. K. DUTTA ( Alternate ) SERI M. H. DALUIA

SHBI K. K. PRASAD ( Alternate ) Orissa Cement Ltd, Rajgangpur

SHBI M. R. DAS Indian Refractory Makers Association, Calcutta SHSI S. K. DAS Directorate General of Supplies & Disposals

( Inspection Wing ), New Delhi SHRI R. N. SAHA ( Alternate )

D~UTY DIRECTOR ( MET )-I, Ministry of Railways RDSO, LUCKNOW

CHEMIST & METALLURCUST ( SF) CLW, CHITTARANJAN ( Alternate )

DR G. D. SIN~H Kumardhubi Fireclay & Silica Works, Calcutta SHRI D. M. GUPTA Belpahar Refractories Ltd, Belpahar

SHRI T. K. GHOSE ( Alternate )

( Continwd an poga 2 )

0 Copyright 1985

INDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.

IS t 1751 - 1984

( Continuedfrom page 1 )

Members

SHRI A. V. HINGIORANI

Representing

Steel Authority of India Ltd ( Bhilai Steel Plant ), Bhilai

Alternate) Sam S. K. JEUNJHUNWALA Orissa Ltd, Rourkela

SHRI M. M. SAHU ( Alternate) SHRI MANMOHAN SIN~H Steel Authority of India Ltd (Bokaro Steel

Plant ). Bokaro SHRI A. S. KHALKHO. ( Alternate )

SERI S. K. MOHANTY Ministry of Defence ( DGOF ) SHEI N. C. MUKHERJEE Indian Firebricks & Insulation Go Ltd, Marar

SHRI V. S. BHUTA ( Alternate ) Smtr S. K. MURHERJEE Bharat Refractories Ltd, Bokaro

SHRI H. N. TRIPATHI ( Alternate ) SHRI J. R. K. MURTEY

. . SHRI N. C. SAHA (Alternate )

SHRI R. C. NANDY SHRI A. K. GHOSH ( Alternate )

DR J. D. PANDA

Harry Refractory & Ceramic Works Pvt Ltd, Calcutta

.’ DR N. SAHOO ( Alternate ) DR T. V. PRASAD SHRI B. RA~+SACHANDRAN

SHRI T. -B. SINQH ( Alternate ) DR M. R. K. RAO

SHRI P. C. SEN (Alternate ) SHRI A. K. RAY

M. N. Dastur & Co ( P ) Ltd, Calcutta

Dalmia Institute of Scientific and Industrial Research, Rajgangpur

Engineers India Ltd, New Delhi Metallurgical & Engineering Consultants India

Ltd, Ranchi

National Metallurgical Laboratory ( CSlR ), Jamshedpur

The All India Glass Manufacturers Federation7 New Delhi

SHRI R. P. SRIVASTAVA (Alternate ) SHRI A. K. SAHA National Test House, Calcutta

SHRI D. KANIJNQO ( Alternate ) SHRI 0. P. SANDHIR Steel Authority of India Ltd ( Research & Deve;

looment Centre for Iron and Steel ), Ranchi *

,. SHRI K. C. CHATTERJEE ( Alternate )

SHRI R. SANKARAN Bharat Heavy Electricals Ltd, Tiruchirapalli SHRI C. S. R. ADHITHYAN ( Alternate )

SHRI K. C. SINHA Directorate of Production & Inspection ( Navy ), Ministry of Defence ( DGI )

SHRI A. K. GOEL (Alternate ) DR B. V. SUBBA RAO SHRI K. S. SWAMINATHAN

SHRI B. N. GHOSH ( Alternate ) SHRI R. THANJAN

Ministry of Defence ( DRDO ), Hyderabad Tata Iron & Steel Co Ltd, Jamshedpur

Directorate General of Technical Development, New Delhi

SHRI I. K. KAPUR (Alternate ) SHRI K. RAOHAVENDRAN,

Director ( Strut & Met ) Director General, IS1 ( Ex-o$icio Member )

Secretaries SHRI B. MUKHERJI

Senior Deputy Director ( Metals ), IS1 SHRI JA~MOHAN SIN~H

Deputy Director ( Metals ), IS1

2

Indian Standard

SPECIFICATION FOR FIRECLAY CUPOLA REFRACTORIES

( Second Revision )

0. FOREWORD

0.1 This Indian Standard ( Second Revision ) was adopted by the Indian Standards Institution on 6 August 1984, after the draft finalized by the Refractories Sectional Committee had been approved by the Structural and Metals Division Council.

0.2 This standard was first issued in 1961 to assist foundries in the country in selecting suitable refractories for1 ining cupola furnaces, and subsequently revised in 1968. In the present revision, requirements for both types of refractories have been modified and SI units have heen adopted.

0.3 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, express- ing the result of a test or analysis, shall be rounded off in accordance with IS : 2-1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

1, SCOPE

1.1 This standard covers the requirements for fireclay cupola refractories.

2. SUPPLY OF MATERIAL

2.1 General requirements relating to the supply of fireclay cupola refractories shall be as laid down in IS : 1387-1967t.

2.2 The refractories shall be compact, of homogeneous texture and free from cracks, voids and other flaws. They shall be burnt evenly throughout, shall have no soft corners and shall have sufficient mechanical strength.

*Rules for rounding off numerical values ( revised ). tGenera1 requirements for the supply of metallurgical materials (first revision ).

3

Is : 1751 - 1984

3. TYPES

3.1 Fireclay cupola refractories shall be of two types, namely, Type 1 and Type 2.

4. SAMPLING

4.1 Representative samples shall be drawn according to the scheme of sampling given in IS : 1528 ( Part 7 )-1974*.

5. TOLERANCE ON SIZE

5.1 Variation from specified dimensions, covering both warpage and shrinkage shall be allowed to the extent & 2 percent or f 1 mm, which- ever is more. Measurements for warpage shah be carried out in accord- ance with IS : 1528 ( Part 11 )-1974t and for dimensions in accordance with IS : 1528 ( Part 10 )-1974$.

6. CHEMICAL COMPOSITION

6.1 The alumina content of the two types of fireclay cupola refractories when determined according to the methods given in IS : 1527-1972s. or IS : 1335-197911 shall be not less than 30 percent.

7. PHYSICAL TEST REQUIREMENTS

7.1 The fireclay cupola refractories, when tested in accordance with the test methods specified, shall conform to the requirements given in Table 1.

8. MARKING

6.1 Each refractory brick or shape shall be clearly marked with the manufacturer’s name or trade-mark and the type of the material.

6.1.1 The brick or shape may also be marked with the ISI Certification Mark.

NOTE - The use of the IS1 Certification Mark is governed by the provisions of the Indian Standards Institution ( Certification Marks ) Act and the Rules and Regulations made thereunder. The ISI Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by IS1 and operated by the producer. ISI marked products are also continuously checked by IS1 for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the IS1 Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution.

Methods of sampling and physical tests for refractory materials: *Part 7 Method of sampling and criteria for comformity (fizst revision ). tPart 11 Determination of warpage (Ji7St revision ). fPart 10 Determination of size of refractory bricks ( JW revision ).

§Methods for direct determination of alumina in refractory materials (Jirst revisien ). ]lMethods for chemical analysis of high silica refractory materials (first revision ).

4

IS : 1751- 1984

ii.

(1)

i)

ii)

iii)

iv)

TABLE 1 PI-IYS ICAL TEST REQUIREMENTS

( czuuss 7.1 )

CHABACTERISTIC

(2)

Pyrometric Cone Equivalent ( Softening Point ), ASTM Code No., Min

Cold Crushing Strength, MPa, Min

Permanent Linear Change after Reheating for 2 h at 145O”C, percent, Max

Apparent porosity, percent, Max

REQUIBEXEXT TEST METHOD T------Y ( REFERENCE TO Type 1 Type 2 IS : 1528 )

(3) (4) (5)

30 31 Part l- 1980*

25 30 Part 4- 1974t

f 1’0 f 0’5 Part 6-1974$

23 20 Part 8-1974s

NOTE - 1 MPa = 10’2 kgf/cm%

Method of sampling and physical tests for refractory materials: *Part 1 Determina tion of pyrometric cone equivalent ( PCE ) or softening point

( second revision ) . *Part 4’Determination of cold crushing strength (Jirst revision ). ZPart 6 Determination of permanent change after reheating (jrst revision ). SPart 8 Determination of apparent porosity (first revision ).

INTERNATIONAL SYSTEM OF UNITS ( SI UNITS)

Baas 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

FIUX 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 Pascal

Symbol

m

kg

:

K

cd mol

Symbol

rad

sr

Symbol

N

J

W

Wb T

HZ

S V

Pa

Depnition

1 N= 1 kg.m/ss

1 J =lN.m I W==lJ/s 1 Wb = 1 V.s 1 1 = 1 Wb/ms

1 Hz 5 1 c/s (s-1) - 1 S = i A/V

1 V = 1 W/A

1 Pa =D 1 N/m: