Stainless steel ball independent coking test method for coking coal

Abstract

The invention relates to a stainless steel ball independent coking test method for coking coal, which comprises the following steps: step 1, manufacturing stainless steel balls with small holes on the spherical surfaces and numbers, step 2, taking various coking single coals in a coal blending tank according to specifications, step 3, filling the stainless steel balls with the single coals through the small holes on the stainless steel balls, the method comprises the following steps: 1, loading coal into a coke oven, plugging after the coal is full, and recording the number of the stainless steel ball and the name of the corresponding single coal, 4, selecting the number of a coke oven carbonization chamber, opening a coal loading hole cover and putting the stainless steel ball into the coke oven carbonization chamber after the coal loading and leveling of the carbonization chamber are completed, and 5, after the coke is mature, pushing the coke according to normal production, quenching the coke, quenching the coke by adopting a wet method, and taking out the stainless steel ball from a coke airing table. Or dry quenching is adopted, and the stainless steel balls are taken out from a dry quenching discharge belt; 6, splitting the ball surface along the stainless steel spherical surface by using a cutting machine, taking out coke, and recording the name of the single coal according to the ball number; and 7, observing the coke corresponding to the single coal and evaluating.

Description

Technical Field

[0001] The invention relates to a test method, in particular to a single coking test method of a stainless steel ball for coking coal, and belongs to the technical field of coking coal testing. Background Art

[0002] Definition of coking: The process of mixing and crushing the single-type coal for coking and then distilling the mixed coal in an air-tight manner to produce coke, coke oven gas and chemical products.

[0003] Blended coal is made of a variety of coking coals in a specified ratio. The grades of coking coal include gas coal, 1 / 3 coking coal, fat coal, coking coal and lean coal. Each grade can have multiple single coals. Affected by the coking coal market, the single coals supplied on the market are mixed and blended, the performance of the single coals fluctuates greatly between batches, and the strength of the coke produced by coking is deteriorated. It is difficult to comprehensively evaluate the performance of a single coal using conventional industrial analysis and process quality index analysis methods for coking coal; the analysis cycle is long using coal rock index analysis and experimental coke oven test methods. Therefore, a new solution is urgently needed to solve the above technical problems. Summary of the invention

[0004] The present invention is aimed at the problems existing in the prior art, and provides a method for testing the coking of coking coal with stainless steel balls alone. The technical solution mainly solves the problem of quickly and accurately judging the influence of the added coal during the deterioration of coke strength in the coking production process. The method and principle of the present invention are: stainless steel balls are loaded with various coking coals used in the current period, and are placed in the upper part of the carbonization chamber of the coke oven in normal production for coking. After quenching the coke, the stainless steel balls are taken out, cut open for observation and evaluation, and then the proportion is reasonably adjusted to ensure the stability of the coke quality.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows: a test method for single coking of stainless steel balls for coking coal, the method comprising the following steps:

[0006] Step 1: Make a stainless steel ball with small holes and numbers on the surface.

[0007] Step 2: Take each type of coking coal from the coal blending tank according to the specifications.

[0008] Step 3: Put each type of coal into the stainless steel ball through the small hole on the stainless steel ball. After the coal is full, plug it up to seal it. Record the stainless steel ball number and the corresponding single coal name.

[0009] Step 4: Select the coke oven carbonization chamber number. After the coal is loaded and leveled in the carbonization chamber, open the coal loading hole cover and put in the stainless steel ball.

[0010] Step 5: After the coke is mature, push and quench the coke according to normal production. Wet quenching is used to remove the stainless steel balls on the coke drying platform; or dry quenching is used to remove the stainless steel balls on the dry quenching discharge belt;

[0011] Step 6: Use a cutting machine to cut open the surface of the stainless steel ball, take out the coke, and record the name of each type of coal according to the ball number.

[0012] Step 7: Observe and evaluate the coke corresponding to each type of coal, including size, color, sound, staining, pore distribution and size.

[0013] As an improvement of the present invention, the diameter of the stainless steel ball in step 1 is smaller than the width and depth of the coke receiving groove of the rotary sealing valve rotor of the dry coke quenching to ensure that the stainless steel ball is discharged onto the belt in the dry coke quenching furnace.

[0014] As an improvement of the present invention, ceramic fiber wool is used to seal after the coal is filled in step 3. The purpose of using ceramic fiber wool is to prevent coal from overflowing or entering;

[0015] As an improvement of the present invention, during dry quenching in step 5, the time for taking out the stainless steel balls from the dry quenching discharge belt is calculated according to the material level of the dry quenching furnace when the red coke is loaded. The specific method is as follows: the material level when the red coke is loaded into the dry quenching furnace is x meters, one furnace of coke is loaded every 10 minutes, and the material level of the dry quenching furnace of one furnace of coke rises (increases) by y meters. Considering the segregation of the dry quenching furnace material surface, the rolling of the stainless steel balls and the deviation of the material discharge speed, the discharge time is advanced by 0.5 hours; the time for taking out the stainless steel balls from the dry quenching discharge belt is the time when the red coke of the furnace is loaded into the dry quenching furnace + x / 6y-0.5.

[0016] As an improvement of the present invention, when evaluating the coke corresponding to a single type of coal in step 7, a method of comparing the single type of coal of the same grade is adopted.

[0017] Compared with the prior art, the present invention has the following advantages: 1) The technical solution can place multiple stainless steel balls filled with a single type of coal in a carbonization chamber of a coke oven for testing, so that multiple single types of coal can be tested and evaluated for coking at the same time under the same working conditions of normal coke oven production; 2) The present invention can adopt dry quenching production or wet quenching production during the test; 3) The present invention uses about 1.3 kg of untreated coal sample, which can intuitively express the coke performance corresponding to a single type of coal; the existing analysis method only has a colloid layer index coal sample of 100g, and the other methods have coal samples of less than 5g, and the coal samples are all crushed; 4) The single type of coal in the present invention generates pressure in the stainless steel hollow ball, and the opening area of ​​the stainless steel ball used in the present invention is equivalent to the amount of coal loaded and the cross-sectional area of ​​the coal gas outlet channel of a carbonization chamber of a normal coke oven and the amount of coal loaded. 5) It takes 18 hours to use a test coke oven to test the coking of a single type of coal, and the test efficiency of the present invention is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 , Figure 2 Schematic diagram of a stainless steel hollow ball.

[0019] In the figure: 1. Character code. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present embodiment is described in detail below with reference to the accompanying drawings.

[0021] Example 1: See Figure 1 , a test method for single coking of coking coal with stainless steel balls. The coke oven in the embodiment of the present invention is a 2*55-hole top-loading coke oven with a carbonization chamber height of 6 meters, and has 4 coal loading holes. Dry quenching is adopted in normal production (wet quenching is reserved). The hourly processing capacity of the dry quenching oven is 140 tons. The dry quenching oven is loaded with one furnace of coke every 10 minutes. The material level of one furnace of coke in the dry quenching furnace rises (increases) by 0.7 meters. Considering the segregation of the dry quenching furnace material surface, the rolling of the stainless steel balls and the deviation of the material discharge speed, the discharge time is advanced by 0.5 hours.

[0022] The turnaround time of coke oven production is 20 hours. The coal blending process adopts the process of blending first and then crushing, and the 16 coal blending troughs are equipped with metering and sampling devices.

[0023] See also Figure 1 , Figure 2 A method for testing the coking of coking coal using stainless steel balls alone comprises the following steps:

[0024] Step 1: Make a stainless steel ball with a small hole on the sphere. The outer diameter of the stainless steel hollow ball is 150mm, the wall thickness is 3mm, the small hole diameter is 25mm, the weight is 0.91Kg, the volume is 1.6L, and the material is 304 stainless steel. The single hole periphery argon arc welding 1, 2...20 code, code 1 faces the single hole, the code size is 3cm, and the code weld scar height is 2mm. See the attached figure for the schematic diagram of the stainless steel hollow ball.

[0025] Step 2: Take each type of coking coal from the coal blending tank according to the specifications. During the coal blending production, use the single coal automatic sampling device to take about 3 kg of each single coal sample, record the tank number and the name of the single coal,

[0026] Step 3: Load each type of coal into the stainless steel ball through the small hole on the stainless steel ball. Shake the ball when it is loaded to the upper part of the ball. After the coal is filled and solid, plug the small hole with ceramic fiber cotton. Each stainless steel ball is loaded with about 1.3 kg of coal. Record the stainless steel ball number and the corresponding single coal name.

[0027] Step 4: Select the coke oven carbonization chamber number. After the carbonization chamber is loaded with coal and leveled, open the No. 2 and No. 3 coal loading hole covers while the high-pressure ammonia valve is open, and place multiple stainless steel balls through the No. 2 and No. 3 coal loading holes into the upper part of the coal in the carbonization chamber. Cover the coal loading hole cover, close the high-pressure ammonia valve, and seal the coal loading hole cover.

[0028] Step 5: The coke matures 20 hours after the furnace is loaded with coal, and the coke is pushed and quenched as normal.

[0029] 5-1 Wet quenching is adopted. The quenching car places the coke from the furnace on the coke drying platform for 30 minutes, and the coke scraper is started to find and take out all the stainless steel balls in the coke on the coke drying platform to cool down;

[0030] 5-2 Dry quenching is adopted. The material level of red coke when loading into the dry quenching furnace is 13 meters. The time of taking out the stainless steel balls from the dry quenching discharge belt is the time of loading the red coke of the furnace into the dry quenching furnace + 13 / 6*0.7-0.5=2.59 hours. The quenching car observes the stainless steel balls on the first dry quenching discharge belt 2.5 hours after the coke of the furnace is loaded into the dry quenching furnace. If any stainless steel balls are found, the belt is stopped and taken out until all the stainless steel hollow balls are taken out. If there are multiple balls, the interval between the first ball and the last ball is about 1 hour.

[0031] Step 6: Use a cutting machine to cut open the surface of the stainless steel ball, take out all the coke in the stainless steel ball and put it into a bag, and record the name of each type of coal according to the ball number.

[0032] Step 7: Observe the coke corresponding to a single type of coal by coal grade, and evaluate the size, color, sound, stain, pore distribution and size. The evaluation of coke corresponding to coking coal is shown in the table below.

[0033]

[0034]

[0035] The purpose of the present invention is to solve the problem of quickly and accurately judging the influence of the added coal during the deterioration of coke strength in the coking production process.

[0036] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0037] It should be noted that the above embodiments are not intended to limit the protection scope of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions all fall within the protection scope of the claims of the present invention.

Claims

1. A test method for coking coal using stainless steel balls alone, characterized in that: The method comprises the following steps: Step 1: Make a stainless steel ball with small holes and numbers on the surface. Step 2: Take each type of coking coal from the coal blending tank according to the specifications. Step 3: Put each type of coal into the stainless steel ball through the small hole on the stainless steel ball. After the coal is full, plug it up to seal it. Record the stainless steel ball number and the corresponding single coal name. Step 4: Select the coke oven carbonization chamber number. After the coal is loaded and leveled in the carbonization chamber, open the coal loading hole cover and put in the stainless steel ball. Step 5: After the coke is mature, push and quench the coke according to normal production. Use wet quenching to remove the stainless steel balls on the coke drying platform; or use dry quenching to remove the stainless steel balls on the dry quenching discharge belt. Step 6: Use a cutting machine to cut open the surface of the stainless steel ball, take out the coke, and record the name of each type of coal according to the ball number. Step 7: Observe and evaluate the coke corresponding to each type of coal, including size, color, sound, staining, pore distribution and size.

2. The method for testing the coking of coking coal using stainless steel balls alone according to claim 1, characterized in that: In step 1, the diameter of the stainless steel ball should be smaller than the width and depth of the coke receiving groove of the rotary sealing valve rotor of the dry coke quenching to ensure that the stainless steel ball is discharged onto the belt in the dry coke quenching furnace.

3. The method for testing the coking of coking coal using stainless steel balls alone according to claim 2, characterized in that: In step 3, after the coal is filled, ceramic fiber wool is used for sealing. The purpose of using ceramic fiber wool is to prevent coal from overflowing or entering.

4. The method for testing the coking of coking coal using stainless steel balls alone according to claim 3, characterized in that: During the dry quenching of coke in step 5, the time for taking out the stainless steel balls on the dry quenching coke discharge belt is calculated according to the material level of the dry quenching furnace when the red coke is loaded. The specific method is as follows: the material level when the red coke is loaded into the dry quenching furnace is x meters, one furnace of coke is loaded every 10 minutes, and the material level of the dry quenching furnace of one furnace of coke rises (increases) by y meters. Considering the segregation of the dry quenching furnace material surface, the rolling of the stainless steel balls and the deviation of the unloading speed, the discharge time is advanced by 0.5 hours; the time for taking out the stainless steel balls on the dry quenching coke discharge belt is the time when the red coke of the furnace is loaded into the dry quenching furnace + x / 6y-0.

5.

5. The method for testing the coking of coking coal using stainless steel balls alone according to claim 3 or 4, characterized in that: When evaluating the coke corresponding to a single type of coal in step 7, a comparison method is adopted for a single type of coal of the same grade.

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