KR800000677B1 - Method of preparing for briquet - Google Patents

Abstract

A briquette having holes was manufactured by mixing powder coal of heat value 3,000 - 4,000 cal with fuel additive. The additives are composed of brown coal 15 wt. %, peat 20 wt. %, graphite 60 wt. %, and slag 5 wt. %.

Description

How to make a bullet

The present invention is based on low-carbon coal, low-carbon coal by a large amount of flammable gas generated during the combustion of the softener by blending a coarse agent by mixing a suitable ratio of lignite, peat, graphite and cast iron at a suitable ratio. It is a method of manufacturing a new coal, which promotes the combustion of fuel and enables low calorie low coal to make practical use during combustion. It develops fuel utilization of low coal, which is not useful only by its own calories, to expand energy resources and make it more economical. Its purpose is to spread it as solid fuel.

In the present invention, low coal refers to powdered coal having a low calorific value of 3000-4000cal, and the powdered coal is turned off in the middle without continuous combustion progress due to poor maintenance of combustion temperature, even if combustion proceeds by itself. There is not much heat other than the amount of heat required to maintain the temperature, and since the temperature obtained from the upper part of the actual combustion cannot be used for cooking heating at 300 ° C or lower, so far, low-carbon coal-based holes have not been practically used. .

Of course, even low-temperature coal is a combustible material, even if it contains a small amount of calorific value, if it is forcibly combusted by adding a volatile component such as bancassille oil, depending on the combustion method, it may be possible to use a small amount of calories or even at a practical temperature.

According to the actual experiment, the heat content of briquettes and the temperature generated during combustion are not proportional, and the temperature generated depends on the combustion state of unit time. Even low-grade coal was found to be capable of obtaining heat above 300 ° C, which is a practical temperature, even if combustion conditions are good.

However, unlike the free combustion condition of coal dust, since the capacity specifications related to the combustion mechanism are determined, the hole coal cannot be used without meeting the capacity specifications.

In the present invention, calorie increase due to lignite and peat added by producing lignite by blending lignite and peat coagulant with the above-described low-quality coal which has not been used in the production of the coal in the standard up to now. Rather than improving, more than 40% of flammable volatiles contained in lignite and peat actively promote continuous unit-time operation of low-quality coal like banca seed oil. Simultaneously born at the same time, which can be continuously obtained for more than a time, a new method of manufacturing a new hole bullet is developed, which is more robust and easier to be removed. The present invention will be described in detail as follows.

Based on the powdered coal of about 3000-4000cal, it is lignite 20% (weight ratio)

Peat 15% ″

Graphite 60% ″

Mixing and pulverizing at a rate of 5% of the molten iron scale to produce a 4500-4800cal of the coagulant, and then, according to the calorie content of the coal powder, the coal powder of the present invention is blended with 30% (weight ratio) of the present coagulant and powdered at 4000-3600cal. It is blended with 20% (weight ratio) of copper-based softener, and blended with 10% (weight ratio) of copper-based softener to 4,000cal or more of powdered coal.

The lignite and peat of the present invention is a kind of coal and contains 40% or more of flammable volatile components in addition to the fixed carbon, so that only 4% of the volatile component of the low-carbon coal is produced by the action of the volatile component of the lignite and peat. Not only is the briquetting action of briquettes actively promoted but also the porosity between the particles of powdered coal is increased during combustion, thereby promoting the combustion action by smooth air supply.

In addition, graphite is a carbon material, which does not burn well at room temperature, but if it is ignited forcibly, it generates stronger thermal power and has a slower burning speed. It contains 1-2% of volatile components, and it is composed of flame retardants such as lignite and peat. When it is mixed with the high-temperature combustion to prevent the thermal fusion of the coal dust also plays a role to help the air supply by maintaining a large porosity.

In addition, the molten iron scale generates free oxygen during the combustion of a material containing a large amount of iron oxides or by-products produced as a by-product upon melting of cast iron, thereby promoting combustion and condensation of the hole carbon material.

Thus, a coal was prepared by mixing a low-carbon coal of 3,500-4,000 cal and a coagulant made of a composition of lignite and peat containing a large amount of combustible volatile components having a calorific value of 4,500-4,800 cal. By promoting the combustion action by the total heat of briquettes will be available.

Test report of the present invention is as follows.

TABLE 1

In the above table, Samples A and C were added with the flame retardant of the present invention, and Sample D was not added with the flame retardant. Samples A and C had a central temperature of 500 ° C.-510 ° C. after 1 hour of ignition. On the contrary, the sample D was only 360 ° C., and thus the difference in acquisition temperature was remarkable depending on whether or not the flame retardant was added.

TABLE 2

In Table 2, 20% of the coagulant was added to 3,600 cal coal, and a central temperature of 640 ° C. was generated after 1 hour of ignition.

TABLE 3

Sample A in Table 3 added 10% of the coagulant to 4,300 cal coal, and the center temperature was 560 ℃ after 1 hour of ignition, whereas sample B was not added to the center temperature at 440 ℃ after 1 hour of ignition. There is a marked difference.

TABLE 4

Sample A in Table 4 was added to the 4,300 cal coal powder, the heat content was reduced by 200 cal, but the practical temperature was higher than 4,350 cal coal.

Sample B is a grenade without the addition of a retardant.

TABLE 5

(1) of Table 5 showed a central temperature of 630 ° C after one hour of ignition with 4,450 cal holes without added coagulant.

Table 2 (2) shows that after 1 hour of ignition with 30% of the coagulant added to 3,000 cal coal, a central temperature of 610 ° C was generated and continued for 10 hours.

Table 3 (3) shows a 3,150-cal hole without any added coagulant. After 1 hour of ignition, the central temperature of 330 ℃ is generated and it is off for 5 hours.

You can see a significant difference from the addition of the aid.

TABLE 6

Table 6 shows that 30% of the coagulant was added to 3,150 cal coal powder. After 1 hour of ignition, the center temperature was generated at 650 ℃ and lasted for 10 hours.

TABLE 7

Table 7 shows that 30% of the coagulant was added to 2,700 cal coal, and the ignition occurred for 1 hour and the center temperature of 620 ° C. was continued for 2 hours.

As can be seen from the above test report, it is difficult to obtain the practical temperature at the time of combustion only by its own calorie, and the low coal powder having no useful value is mixed with the coagulant composition containing the combustible volatile materials such as lignite and peat, thereby forcing the shot coal. It will lead to the combustion action, and it becomes a new hole coal that can use all the heat of low quality coal at practical temperature.

Claims (1)

As described in the main text, 3,000-4,000cal of coal powder is used as the main ingredient, and the coarse-grained material blended at a weight ratio of 15% lignite, 20% peat, 60% graphite, and 5% molten iron scale is mixed with the powdered coal at an appropriate mixing ratio. The manufacturing method of a hole bullet characterized by manufacturing a hole bullet.