JPS5949292A - Forming of lignite - Google Patents

Abstract

PURPOSE:To obtain a formed lignite having high strength, by heating lignite with microwave thereby evaporating the water and volatile component from the lignite and softening the lignite, and forming the treated lignite. CONSTITUTION:When lignite is irradiated with microwave, the lignite is heated internally by the molecular vibration of the constituent molecules of the lignite corresponding to the frequency of the microwave, and the water and the volatile components are evaporated and at the same time, the lignite is softened (to the so-called steamed state). The microwave irradiation is stopped at the stage, and the lignite is molded by a molding machine to obtain molded lignite.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses electromagnetic waves to heat lignite, which has a high water content and acid content, and when X2 is dried, it can be pulverized for convenience. This relates to a lignite molding method in which lignite is softened and molded to produce briquette 111 charcoal.

Tonghan lignite absorbs 60%+iil+ moisture and turns into powder when it is dried, so it is at the bottom of the range in terms of transportation and utilization, and the range in which it can be used as a resource is extremely limited. Currently, it is limited to certain fields.

Therefore, if lignite can be used to lower this water content and can be molded and used as compacted coal, it can be used extensively as a resource without being pulverized.

However, even in the case of briquette coal obtained by molding coal raw materials, the adhesion between coal particles is inhibited by moisture, so briquettes with a maximum water content of about 10 to 12 min are used. Moreover, a method is used in which a petroleum-based or coal-based adhesive is added, kneaded at a high temperature, and then molded.

However, this method cannot be used with lignite because the binder is expensive and lignite has a high water content.

In this, the present inventors applied electromagnetic heating to lignite to lower the moisture content of the lignite and soften it, and irradiated the lignite with microwaves without using a -C binder. When this occurs, molecular vibrations corresponding to the same wave number occur in the constituent molecules of the lignite, which generates heat from within, causing the moisture content to evaporate as water vapor. As it evaporates,
The lignite itself is heated from the inside and exhibits the so-called 6-stiffness phenomenon, resulting in a soft taste of 5. At this point, if the microwave irradiation is stopped and the lignite is molded using a molding machine, it becomes strong 1; ]I (Charcoal briquettes are obtained.

1 obtained in this way (molded 11 charcoal to form C) 1!!
By using charcoal, it is easy to transport and there is no fear of pulverization, so it can be transported to a desired location, and IIF charcoal can be used as a direct resource such as fuel for boilers.

An example of this is plankhor, which is obtained in the south, but until now, most of it has been left alone due to its drying and pulverizing properties, and some of it has been found locally, causing problems such as tortoises, etc. However, if the process of the present invention is applied to briquette coal, it can be easily transported and shipped as strong briquette coal. This opens the door for it to be used as a fuel for power generation boilers, etc., and it can be used as an electric energy source.

The present invention will be explained below with reference to Examples.

Example 1 Plancoal having the following industrial analysis values and particle size distribution was irradiated with microwaves to heat the inside and molded to obtain molded coal that could be sufficiently transported and utilized.

Industrial analysis value 9.0 3.3 46.6 41.1 43.1 0.
33 5.5613.3 2.9 44.9 38.9
48.6 0.32 5.34 Particle size distribution 2.00 to 1.00 1.00 to U, 50 0.5 or less 31.5 1.0 0.3 Weigh 50 g of the above Plancor and place it in a porcelain crucible. and the output gooW magnetron (Matsushita Maki Sangyo)
[Model 21488] emitted from the microwave (frequency g9
．． 2,450 m1m 30 MF+") The coking coal reached a temperature of approximately 120°C and became "smooth" and had a soft taste. At this point, the microwave irradiation was stopped and the coking coal was placed in the crucible. It was taken out and molded at a molding pressure of 400 kg/d.

The intensity was measured and the following results were obtained.

Drop strength: 10 or more 85.7% Example 2 Example 1 was repeated to obtain the same raw coal for molding, and 20 g of raw coal for molding was supplied per mold to a twin continuous molding machine. The material was then molded under a molding pressure of 300 kg/crl.

Put the obtained products into plastic bags, 5 pieces at a time, and place them at a height of 2
It was allowed to fall naturally onto a concrete floor from a point of m. 5 experiments
After repeating the test 10 times or more, a result of 81.5% was obtained.

Representative Patent Attorney Iwao Kika

Claims (1)

[Claims] I11 island (contains moisture by irradiating and heating the microphone T-wave)
1. At the same time as evaporating the low volatile matter, the lignite is made to have a softer taste and then molded into lignite to obtain briquette charcoal! 11 is the carbonated type method.