ISO 616-1995 Coke - Determination of shatter indices《焦炭 落下强度指数测定方法》.pdf

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1、INTERNATIONAL STANDARD IS0 616 Second edition 1995-l l-01 NWH 1Imt4crnat DQC se% Coke - Determination of shatter indices Coke - Dbtermination des indices de chute Reference number IS0 616:1995(E) , IS0 616:1995(E) Foreword IS0 (the International Organization for Standardization) is a worldwide feder

2、ation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that commit

3、tee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the tec

4、hnical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 616 was prepared by Technical Committee lSO/TC 27, Solid mineral fuels, Subcommittee SC 3, Cok

5、e. This second edition cancels and replaces the first edition (IS0 616:1977), which has been technically revised. 0 IS0 1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including pho

6、tocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii 0 IS0 IS0 616:1995(E) Introduction The shatter index of coke can be determined for one test sieve or f

7、or each of a number of test sieves of different sizes of holes (e.g. 80 mm and 40 mm). The higher the shatter index, the greater the resistance of the coke to breakage into pieces which are smaller than the stated size. The mean size of the coke before and after the shatter test may also be determin

8、ed to give additional information about the strength of the coke. Ill INTERNATIONAL STANDARD 0 IS0 IS0 616:1995(E) Coke - Determination of shatter indices 1 Scope This International Standard specifies a method for determining the strength of coke by the shatter test. 2 Normative references The follo

9、wing standards contain provisions which, through reference in this text, constitute provisions of this international Standard. At the time of publi- cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are en

10、couraged to investigate the possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 579:1981, Coke - Determination of total moisture content. IS0 728: 1995, Coke (nominal top size

11、 greater than 20 mm) - Size analysis by sieving. IS0 2309:1980, Coke - Sampling. IS0 3310-2:1990, Test sieves - Technical require- ments and testing - Part 2: Test sieves of perforated metal plate. 3 Definition For the purposes of this International Standard, the following definition applies. 3.1 sh

12、atter index: Percentage of a specially pre- pared sample of coke remaining on a test sieve of stated size of openings after the sample has been subjected to a specified dropping test. 4 Principle A test portion taken from the coke above a specified size is dropped under standard conditions. The mass

13、 of coke which is then retained on a test sieve, or on each of two or more test sieves of different sizes of holes, is determined. 5 Apparatus 5.1 Shatter test apparatus bee figure I), mounted on a solid base and consisting of the following parts. 5.1.1 Base unit, comprising a steel base plate with

14、further plates fitted on all sides to prevent loss of coke during the test. The base plate shall be not less than 12 mm thick, 1 220 mm long and 970 mm wide. Each of the other plates shall be not less than 200 mm high and 10 mm thick. The back plate (see note 1) and the side plates shall be rigidly

15、fixed and the front plate shall be removable (see note 21, so as to facilitate shovelling the coke from the base unit into the box (5.1.4) after each drop. NOTES 1 For the purposes of describing the apparatus, it is viewed from the “front” when the counterweight appears to the right (as depicted in

16、figure 1). 2 For convenience, the front plate may be hinged and fit- ted with latches. 1 IS0 616:199!$E) 0 IS0 Single-sheave pulley Double-sheave pulley 7 Top plate stops - Box guide - 710 - n . . . lj stops / Front elevation Side elevation Dimensions in millimetres 460 i Guide channel - -Latch Wire

17、 ropes - r- Counterweight I Base unit b _-_-_- - 1 - ! ! Figure 1 - Example of shatter test apparatus 2 0 IS0 IS0 616:1995(E) The rigidity of the base plate shall be ensured by one of the following means, of which the first is the sim- pler. a) The base plate is supported solidly on a concrete raft,

18、 and the side and back plates and the vertical supports (5.1.2) are welded to it. b) The base plate is supported above a solid floor, on a lower framework of 75mmx 75 mm x 10 mm angle-iron to which it is welded or riveted; the side and back plates are welded or riveted to this framework and also to

19、a vertical piece of angle-iron at each of the two back cor- ners. 5.1.2 Main vertical supports, fastened to the out- side of the side plates of the base unit. If the base plate is supported on a framework of angle-iron, the vertical supports shall be riveted or welded to the angle-iron to increase r

20、igidity. The two vertical sup- ports shall be constructed ,in, on.e of the following ways. , a) b) Each support consists of a T-section 150 mm wide with a 60 mm web. The web shall be removed where it is fastened to the side plate of the base unit. Each support consists of two 75 mm x 75 mm angles se

21、t 13 mm apart. 51.3 Top plate, 150 mm to 200 mm wide and 6 mm thick, fastened. to the main vertical supports, with a single-sheave pulley mounted at the left-hand end and a double-sheave pulley at the right-hand end. 5.1.4 Box, of internal dimensions 710 mm long, 460 mm wide and 380 mm deep. The bot

22、tom of the box shall consist of two doors, hinged lengthwise and provided with a latch or other fastening capable of rapid opening. The doors shall be made of 6 mm steel plate and shall swing open rap- idly, so as not to impede the fall of the coke. The fastening shall be designed so that it can be

23、released without causing the box to move (see, for example, the arrangement shown in figure I). The sides of the box shall be made of steel plate not less than 3 mm thick. 5.1.5 Box guides, approximately 250 mm long, fit- ted to the end plates of the box, to engage with the main vertical supports. I

24、f the main vertical supports consist of T-sections, each box guide shall be double to run on either side of the web of the T-section. If the main vertical supports consist of 75 mm x 75 mm angles, each box guide shall consist of 6 mm plate which can move in the channel be- tween the two angles. 5.1.

25、6 Wire ropes and counterweight, for support- ing the box. A wire rope shall be fastened to each box guide (5.1.5) near the side support, so as to interfere as little as ,possible with the reloading of the box after each drop. ,The two wire ropes shall pass over the pulleys and a counterweight shall

26、be suspended from the other ends of the ropes. The counterweight shall consist of a fixed weight, of mass equal to that of the box, and two 12,5 kg removable slotted onto a rod which passes of the fixed weight. 5.1.7 Box stops, to restrain the box, on either side, at the top and bottom of its run. T

27、he upper stops shall be located so that the highest position to which the box can be raised is where the inside of the bottom of the box is 1 830 mm above the surface of the base plate. The lower stops shall be located to prevent.the box from travelling below. the position where the dis- tance betwe

28、en the bottom of the box and the base plate is 460 mm. weights which are through the centre If the main vertical supports consist of 75 mm x 75 mm angles,. the stops shall consist of plates filling the slot between the two angles. If the main vertical supports consist of T-sections, the lower stops

29、shall consist of plates fixed to the web of the sections. The upper stops shall be provided by means of similar plates or, alternatively, the distance pieces fixing the width of the slots between the dou- ble guides shall be extended vertically to form stops against the top plate. 5.2 Test sieves, o

30、f perforated plate, square hole, complying with IS0 3310-2 and of nominal sizes of holes 125 mm, 100 mm, 80 mm, 63 mm, 50 mm, 40 mm, 25 mm and 12,5 mm. The sieve plates shall be 600 mm square and shall be mounted in hardwood frames armoured with angle plates to reduce wear. When the wear on any hole

31、 exceeds 2 % of its nom- inal size, the hole shall be blanked off or the test sieve changed. NOTE 3 For the larger sizes of foundry coke, single-hole gauges may be used instead of test sieves. 3 IS0 616:1995(E) 0 IS0 5.3 Weighing machine, with a capacity of not less than 25 kg, capable of weighing t

32、o the nearest 10 g. 6 Sampling and size analysis Take two gross samples for physical testing in ac- cordance with IS0 2309:1980, Coke - Samp/inglr. Prepare one of these samples for the determination of moisture content in accordance with IS0 2309 and carry out the determination in accordance with IS

33、0 579. If the moisture content is higher than 5 % (m/m), dry the other sample sufficiently to reduce the moisture content to lower than 5 % (m/m). Use this second sample for the remainder of the test. Carry out a size analysis in accordance with IS0 728 on the sample using a set of test sieves (5.2)

34、 of suc- cessive nominal size of holes, the sieve with the largest size of holes being that on which not more than 5 % (m/m) of the sample remains. Place the coke by hand on the sieves of nominal size of holes down to and including 40 mm. For the smaller hole sizes, carry out sieving manually by hol

35、ding the sieve in the hands, or suspending it freely, and shaking it horizon- tally to and fro with a displacement of about 75 mm. Complete fifty such oscillations (each consisting of one movement to and fro) in a period of about 30 s. If the amount of coke remaining on the sieve is then such that i

36、t covers more than 75 % of the sieve area, divide it into two or more portions and manually shake each portion separately. Weigh each size fraction, to the nearest IO g, and place each fraction in a separate pile or container. Record the masses retained on the individual sieves as cumulative percent

37、ages. 7 Preparation of test portion Constitute a 25 kg b) a complete identification of the sample; c) the date of the test; d) the results expressed in accordance with clause 9; e) any unusual features noted during the determi- nation; f) any operation not included in this International Standard, or regarded as optional. 5