JPS61197687A - Jig and method for measuring expansion and/or contraction in dry distillation of coke - Google Patents

Abstract

PURPOSE:To measure the degree of expansion and/or contraction readily in dry distillation of coke, by inserting an insert of a casing provided with a inserting tip and a measuring tip into a stamp cake and determining the positions of the stamp cake befor and after dry distillation of coke. CONSTITUTION:An insert 2 is formed at one end of a stainless steel rod 1 and a measuring tip 1, on the other end. A coiled part 4 is formed between the insert 2 and measuring tip 1 by bending the rod spirally and a casing 6 is formed by filling a heat-resistant caster around the coiled part 4. In the production of coke by stamp-charge process, the insert projecting from the casing 6 is inserted in a stamp cake 8 and positions of the stamp cake before and after dry distillation are determined with the measuring tip 3 projecting from the casing 6 to find out the degree of expansion and/or contraction of coke in dry distillation.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is a coke production method using a stamp charge method in which compacted cakes are charged, and the expansion and/or contraction It of compacted cakes, etc., during the carbonization process. A jig for measurement, and an expansion and/or measurement using the jig.
Or it relates to a shrinkage measurement method.

[Conventional technology]

In recent years, with the increase in the size of blast furnaces and the diversification of coking coal types, there has been a demand for measures to address these issues in coke production.

In response to these demands, attempts have been made to increase the bulk density of charged coal to improve the productivity of coke ovens and the quality of produced coke, thereby making use of low-rank coal.

One method for producing coke is a stamp charge method in which the entire amount of charged coal is compacted and charged as a compacted cake.

When this method is used, the bulk density of charged coal increases greatly, and the increase rate reaches 30 to 40% compared to the conventional pulverized coal charging method.

Therefore, compared to the conventional pulverized coal charging method, the expansion force during carbonization of the formed cake is stronger, and the coke 1 novel after carbonization tends to be higher compared to the conventional pulverized coal charging method compared to the charging/coal cake level. It was seen.

Clarifying the relationship between the coal level and coke level before and after carbonization is important for designing heating ovens, determining coal cake dimensions, etc. in order to apply the stamp charge method to new or existing coke ovens.

In particular, in relation to the weight of the compacted cake and the expansion pressure during carbonization, it is necessary to specifically understand the degree of expansion and/or recovery R3 of the produced coke in the vertical and horizontal directions.

Figure 7 shows the relationship between the bulk density of charged coal and coke expansion.

In other words, the difference between the coke level at charging and the coke level after carbonization is expressed as a percentage of the initial coal level.If the coke level is high, it is due to expansion, and vice versa. If the case indicates contraction.

From this result, compared to the conventional pulverized coal method, the higher the bulk density, the higher the expansion rate.

However, although the overall expansion can be determined by the difference between the coke height immediately after charging the compacted cake and the coke level after carbonization, it is not clear where the expansion is occurring in the height direction, and the difference between the self weight and expansion pressure is unknown. If the relationship is unknown and actual furnace application is to be realized, the dimensions of the charging cake cannot be determined.

As mentioned above, although it is extremely important to measure the degree of expansion and contraction of each part in the stamp charge type coke production method, there has been no suitable jig or method for measuring the degree of expansion and/or contraction in the past. Ta.

[Problem that the invention seeks to solve]

The present invention provides a jig and method for precisely measuring the degree of expansion and/or contraction of a compacted cake in a coke manufacturing method, particularly a stamp charge type coke manufacturing method, etc. The purpose of the present invention is to analyze the shrinkage characteristics of each part of the cake and obtain data necessary to put the stamp charge method into practical use.

[Means for solving problems]

The present inventor has discovered that the expansion of a molded cake during coke carbonization and/or
In measuring the degree of shrinkage, the inventors have invented a measuring jig that serves as a mark for a compacted cake, and have also invented a method for measuring the degree of expansion using the jig of the present invention.

That is, the expansion chamber measuring jig of the present invention is as follows.

In stamp charge coke production methods, etc.
To measure the expansion during the carbonization process, one end of a stainless steel rod consisting of both pointed ends of the insertion part and the measurement end was bent into a coiled part, the area around the coiled part was filled with casters, and the box was closed. This is an expansion chamber measuring jig during coke carbonization, characterized in that the position of the tip of the stainless steel rod protruding from the box is measured, and as an embodiment, the periphery of the stainless steel coiled portion is covered with asbestos. This is a measuring jig wrapped in a heat insulating material such as

Furthermore, the second invention is to insert the tip of one insertion part of the measuring jig of the invention, that is, the stainless steel rod, into the stamp cake, and measure the height and horizontal position of each part of the stamp cake before and after carbonization of the jig. In this method, measurements are taken at the tip of the measurement end of a stainless steel rod protruding from a box, and the degree of expansion and/or contraction of each part of coke during carbonization is measured based on the difference in position.

[Effect]

1 and 2 are a side view and a front view, respectively, of a measuring jig that is an embodiment of the present invention.

As shown in the figure, an insertion portion 2 is formed at one tip of a stainless steel rod 1 that can withstand temperatures of 1000 to 1100° C. in a coke oven, and a measurement end portion 6 is formed at the other tip. During this period, the stainless steel rod 1 is bent into a spiral shape to form a coiled part 4, and the circumference of the coiled part is t-10.
Fill it with heat-resistant casters 5 that can withstand temperatures of 00 to 1100 degrees Celsius, put caster powder mixed with water in the wooden frame of the box 6, dip the coiled part of the stainless steel rod processed as described above, and let it air dry. After air drying, the wooden frame is removed to form a box 6.

In order to prevent separation due to differences in thermal conductivity and coefficient of thermal expansion between the caster 5 and the stainless steel coiled part 4, specifically to prevent cracking, an interference material 7 such as asbestos is inserted into the coiled part of the stainless steel rod as shown in FIG. It is preferable to wrap it around 4.

In this measuring tool, the reason why the insertion part 2 is made into a pointed end is to perform the action of a nail, and the pointed end of the measuring end part 6 is made as sharp as possible by processing with a grinder, etc., especially when measuring after forming the box. If so, it is necessary to sharpen it again using cloth or other material to improve measurement accuracy.

Normally, if the length of the insertion part 2 is too short, it will fall during carbonization, and if it is too long, an abnormal force will be required to insert it, which will cause the cake to collapse. 15 to 20 is preferable in terms of measurement accuracy.

What is important here is that iron rods should not bend in the high-temperature atmosphere during coke carbonization and should not leave their original shape, so stainless steel or the like, which is resistant to oxidation and heat, is preferable. By forming a box 6 with the casters 5 and covering the area to be measured with the casters 5, the position can be easily determined during measurement and workability can be improved.

The measuring jig 1 described above is optionally inserted into the front surface of the compacted cake 8 as shown in FIGS. 4 and 5, and the positions before and after carbonization are measured to measure the degree of expansion and/or contraction.

Next, examples will be described.

〔Example〕

As shown in Figures 1 to 6, the length of approximately 3 mm is approximately 200 + m.
The length of the insertion part 2 is 160cm, and the rest is bent into a spring shape to form the coiled part 4. The coiled part 4 is wrapped with asbestos 7, and the length of the measuring end 3 is 5- or so, and align it with the center of the insertion part to make it protrude. Sharpen each tip using a grinder.

On the other hand, place the coiled part 4 of the measuring tool 1 into a wooden frame of length 4 Q wm x width 401111 x depth 15 cm, which is filled with castor powder mixed with water, and dry it in fresh air. After air drying, remove the wooden frame and polish the measuring end 3 on the caster side with a cloth or the like.

The measurement jig prepared in this way was made into a compacted cake (height: 840 cm x width: 375 cm, length: 985 m) as shown in Figure 5.
Figure 6 shows the results of measuring the positions before and after carbonization by inserting marks at six positions as shown in Figure 8. In Figure 6, the numbers before carbonization (fc<) indicate the positions after carbonization.

In addition, the values in [] represent the expansion before and after carbonization as a percentage.

This result shows that the coke level after carbonization is 902I 1 ml, which is 62cm and expands to the upper part of the charged coal cake 8, which has a height of 840cm.According to this measurement method, the expansion position is only at the top. It is clear that the lower part is contracting due to its own weight.

[Effects of the Invention] According to the expansion and/or contraction degree measuring jig and measuring method according to the present invention, it is possible to determine the expansion and contraction degree of each region, which was not known in the past, and also to estimate the expansion pressure during carbonization. This is a useful invention that fully achieves the purpose of the present invention.

[Brief explanation of drawings]

Figures 1 and 2 are side and front views, respectively, of a measuring jig that is an embodiment of the present invention, Figure 3 is a side view of another embodiment, and Figure 4 is an installation of the measuring jig. FIG. 5 is an explanatory diagram showing the example. Explanatory diagram showing measurement jig installation,
FIG. 6 is an explanatory diagram showing the degree of expansion of the cake in the example,
FIG. 7 is a graph showing the relationship between the bulk density of charged coal and coke expansion. In the figure, 1 stainless steel rod, 2: insertion part, 3: measurement end, 4: coiled part, 5: caster, 6: national situation,
7: Asbestos, 8: Consolidated cake. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] (1) In the stamp charge coke manufacturing method, etc., when measuring expansion during the carbonization process, one end of a stainless steel rod consisting of both pointed ends of the insertion part and the measurement end is bent into a coiled part. A jig for measuring expansion and/or contraction during carbonization of coke, characterized in that the periphery of the stainless steel rod is filled with casters to form a box, and the position of the tip of the stainless steel rod protruding from the box is measured. . (2) The expansion and/or contraction degree measuring jig during coke carbonization according to claim 1, characterized in that the stainless steel coil-shaped object is surrounded by a heat insulating material such as asbestos. (3) When measuring expansion and/or contraction during the carbonization process in stamp-charge coke manufacturing methods, etc., one end of a stainless steel rod consisting of both pointed ends, an insertion part and a measuring end, is bent into a coiled part. , the periphery of the coiled part is wrapped with asbestos, etc., and then filled with casters to form a box, one tip of the stainless steel rod protruding from the box is inserted into the stamp cake, and the stamp is inserted into the stamp cake. A method for measuring the degree of expansion and/or contraction during coke carbonization, characterized in that the position of the cake before and after carbonization is measured with the tip of the measurement part of the stainless steel rod protruding from above the box.