CN114088569A - Separation method of non-molten coal material in coking coal - Google Patents

Abstract

The invention belongs to the technical field of steel production, and particularly relates to a separation method of non-melting coal materials in coking coal, which comprises the following steps of 1, adopting a single coal sample, and airing the weight of the single coal sample; 2. sieving coal particles with the particle size of more than 1mm in water, airing and weighing; 3. preparing 180-mesh anthracite; 4. mixing 3 parts of anthracite and 1 part of coal sample according to the mixing proportion, and ensuring that the water content is 11%; mixing uniformly to prevent segregation; 5. loading into a test coke oven coal box in batches; 6. loading the coal box filled with the mixed sample into a test coke oven, controlling the oven temperature to be 850 ℃, and refining for 19 hours; 7. taking out the coal sample from the furnace, extinguishing and airing; 8. sieving coal particles with the particle size of more than 1 mm; 9. the non-melted particles were sorted out and weighed. The method can effectively and quickly measure the blending quantity of the non-melting coal of a certain single coal, can quantify the blending degree of the single coal with the inferior feed coal, and has important significance for improving and evaluating the quality of the feed coal.

Description

Separation method of non-fusible coal material in coking coal

Technical Field

The invention belongs to the technical field of steel production, and particularly relates to a method for separating non-molten coal in coking coal.

Background

The coke often contains non-melting particles, which directly destroy the strength of the coke after reaction. The non-melting particles are derived from a single coal, and how to quantify the quantity of the non-melting particles has important significance on distinguishing or judging the quality of the single coal. The particles mixed in the coal sample and not melted are not distinguishable by naked eyes and physical methods such as a specific gravity method.

Disclosure of Invention

In order to solve the problems, the invention provides a method for separating non-molten coal materials from coking coal, which can measure the quantity of non-molten particles and achieve the purpose of verifying the mixed coal state of single coal by material. The method can effectively and quickly measure the blending quantity of the non-melting coal of a certain single coal, can quantify the blending degree of the single coal with the inferior feed coal, and has important significance for improving and evaluating the quality of the feed coal.

The technical scheme adopted by the invention is as follows: a separation method of non-molten coal materials in coking coal comprises the following steps:

step one, adopting a single coal sample, naturally airing, and recording the weight;

step two, screening coal particles larger than or equal to 1mm in water, naturally drying and recording the weight;

step three, preparing 180-mesh (60 percent) anthracite (the quality is equal to that of steel injection anthracite);

blending 3 parts of anthracite and 1 part of coal sample by the mixing proportion, and ensuring that the water content is 10-11%; mixing uniformly to prevent segregation;

step five, loading the coal into a test coke oven coal box in batches, not allowing tamping, and keeping the coal surface flat;

step six, loading the coal box filled with the mixed sample into a test coke oven, controlling the temperature of the oven to be 800-;

seventhly, extinguishing and airing the coal sample after being discharged from the furnace and refined;

step eight, screening coal particles larger than or equal to 1 mm;

and step nine, sorting out non-molten particles and weighing.

Further, in the sixth step, the furnace temperature is 850 ℃ and the refining time is 19 hours.

The invention has the beneficial effects that: the method for separating the non-molten coal material from the coking coal is provided, the quantity of the non-molten particles can be measured, and the purpose of verifying the mixed coal state of single coal by using a real object is achieved. The method can effectively and quickly quantify and measure the blending quantity of the non-melting coal of a single coal, can quantify the blending degree of the single coal and the inferior raw material coal, and has important significance for improving and evaluating the quality of the raw material coal.

Detailed Description

A separation method of non-molten coal material in coking coal comprises the following steps:

step one, adopting a single coal sample, naturally airing, and recording the weight;

step two, screening coal particles larger than or equal to 1mm in water, naturally drying and recording the weight;

step three, preparing 180-mesh (60 percent) anthracite (the quality is equal to that of steel injection anthracite);

blending 3 parts of anthracite and 1 part of coal sample by the mixing proportion, and ensuring that the water content is 10-11%; mixing uniformly to prevent segregation;

step five, loading the coal into a test coke oven coal box in batches, not allowing tamping, and keeping the coal surface flat;

sixthly, the coal box filled with the mixed sample is placed into a test coke oven, the temperature of the oven is controlled to be 8500 ℃, and the mixture is refined for 19 hours (other operations are specified according to the test coke oven);

seventhly, extinguishing and airing the coal sample after being discharged from the furnace and refined;

step eight, screening coal particles larger than or equal to 1 mm;

and step nine, sorting out non-molten particles and weighing.

According to the coking principle, the raw material coal is subjected to high-temperature dry distillation to refine metallurgical coke. The raw coal must be softened and melted at high temperature to ensure the formation of coke. Coal that does not soften and melt is generally not used for coke making, and raw coal that does not soften and melt exists in the form of particles after refining. The method utilizes the colloidal body which absorbs the melting raw material in the anthracite coal blending coal sample with 180 meshes to prevent the non-melting particles from being contained or adhered when the anthracite coal blending coal sample is softened and melted, thereby achieving the purpose of easy separation of the anthracite coal and the non-melting particles.

Claims (2)

1. A method for separating non-molten coal materials from coking coal is characterized by comprising the following steps: the separation method comprises the following steps:

step one, adopting a single coal sample, naturally airing, and recording the weight;

step two, screening coal particles larger than or equal to 1mm in water, naturally drying and recording the weight;

step three, preparing 180-mesh anthracite;

blending 3 parts of anthracite and 1 part of coal sample by the mixing proportion, and ensuring that the water content is 10-11%; mixing uniformly to prevent segregation;

step five, loading the coal into a test coke oven coal box in batches, not allowing tamping, and keeping the coal surface flat;

step six, placing the coal box filled with the mixed sample into a test coke oven, controlling the oven temperature at 800-;

seventhly, extinguishing and airing the coal sample after being discharged from the furnace and refined;

step eight, screening coal particles larger than or equal to 1 mm;

and step nine, sorting out non-molten particles and weighing.

2. The method for separating infusible coal material from coking coal as claimed in claim 1, wherein: in the sixth step, the furnace temperature is 850 ℃ and the refining time is 19 hours.