Rapid coke quality inspection method

Abstract

A rapid coke quality inspection method comprises the following steps: coke enters a factory, a using unit informs quality inspection sampling, and factory entering information is provided; presetting group batches, wherein coke entering the factory in the same day with the same product name and the same supply unit is one batch; checking sampling information; carrying out visual inspection on the carriage or the material pile surface, and continuing after no abnormity exists; sampling is performed; starting quality objection processing when abnormity is found; preparing an analysis sample according to a physical experiment standard; testing is conducted; performing qualification / disqualification judgment, and adding and deducting money to an out-of-tolerance part according to a contract; quality objection processing: when the supplier objection to the result, applying for reinspection or third-party inspection, and performing settlement according to the arbitration result; the method solves the problems of inaccurate inspection data, misleading of production and influence on normal settlement of coke and legal interests of supply and demand parties due to the fact that the existing factory coke quality control operation links are more, the operation methods of sampling and sample preparation personnel are different, and inspection deviation is easy to occur. And the controllability of the factory coke quality inspection process and the accuracy of the inspection result are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coke inspection, in particular to a coke quality rapid inspection method. BACKGROUND

[0002] Coke is an indispensable burden in blast furnace ironmaking, and its main functions are: first, as fuel, the main heat source of blast furnace ironmaking; second, as reducing agent, coke reduces iron ore in the form of C and CO; third, as burden support framework, supporting ironmaking raw materials (sintered ore, pellet ore, and natural lump ore) and playing the role of gas permeation window. The quality of coke directly affects the normal production of blast furnace ironmaking (chemical composition, particle size, and physical properties, generally the lower the ash content, the higher the strength, the more uniform the particle size, and the lower the harmful element content, the better).

[0003] Due to the large amount of coke used, 350kg-500kg of coke is needed for smelting 1 ton of molten iron, and the purchase price is expensive, with more than 2000 yuan / ton for coke of the second grade and above, and the coke cost accounts for about 20%-30% of the total cost of steel, therefore, good quality control of incoming coke is the key to ensuring stable production and determining whether the company is profitable. At present, major steel companies mainly inspect the quality of coke according to the contract, including coke composition, particle size (60mm or more, 40mm-60mm, 25mm-40mm, and 25mm or less), mechanical strength (drum strength and wear resistance index), and thermal state index, and then determine the quality of incoming coke (qualified or unqualified) according to the contract standard (contract standard and deduction clause), and deduct the unqualified coke according to the deduction clause. In addition, due to the many operation links (sampling, sample preparation, physical experiments, and abnormal situation handling, etc.) in the process of incoming coke quality control (sampling and sample preparation), and the different operation methods of sampling and sample preparation personnel, it is easy to cause inspection deviation, resulting in inaccurate inspection data, misleading production, affecting normal settlement of coke, and affecting the legal interests of both the supplier and the user. Therefore, there is an urgent need for a standardized inspection process and method that can quickly reflect the true results of coke. SUMMARY

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a coke quality rapid inspection method.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a coke quality rapid inspection method, comprising the following steps:

[0006] (1) incoming coke, the quality inspection unit is notified by the user to provide the incoming date, product name, supplier, car number, car number, and card number information;

[0007] (2) The same batch, the same product name, the same supply unit and the same day of coke entering the factory are regarded as one batch;

[0008] (3) Check the sampling information, check the car number, product name and supply unit, and then sample after no error is found;

[0009] (4) Quality visual inspection, the particle size, color, moisture, inclusion, impurity and mixed loading of the surface of the car or pile are visually inspected, and then the process is continued after no abnormality is found;

[0010] (5) Sampling: start quality dispute processing when abnormality is found;

[0011] (6) Sample preparation: prepare an analysis sample according to the physical experiment standard, and start quality dispute processing when abnormality is found;

[0012] (7) Testing: test according to the items specified in the contract standard;

[0013] (8) Judgment: make qualified / unqualified judgment according to the contract tolerance, and deduct or add the amount according to the contract for the part exceeding the tolerance;

[0014] (9) Quality dispute processing: the supplier can apply for re-inspection or third-party inspection when having objection to the result, and settle according to the arbitration result;

[0015] (10) Settlement: generate a settlement sheet.

[0016] As a further improvement of the present application: the quality abnormality in the step (4) quality visual inspection includes:

[0017] ① Particle size abnormality: honeycomb coke, furnace head coke and grape coke exceeding 5%, large block >100mm or powder <25mm exceeding 8%;

[0018] ② Moisture abnormality: moisture <6%, and the immersion condition is determined by cross-section visual inspection;

[0019] ③ Color abnormality: two or more colors appear in the same batch;

[0020] ④ Layering and mixed loading: obvious upper and lower layering or hidden loading appears in the cross-section;

[0021] ⑤ Inclusion: non-coke materials exist.

[0022] As a further improvement of the present application: the non-materials of the inspected material in the step ⑤ inclusion include straw bundles, bamboo piles, mineral powder, coal powder, wood and stones in the coke.

[0023] As a further improvement of the present application: the manual sampling in the step (5) sampling includes the following steps:

[0024] 1) Train car sampling: each car is distributed according to the top, middle and bottom in the ratio of 3:1:1, and the sampling ratio of the side door and the middle door is determined according to the card number cycle;

[0025] 2) Coke shed sampling: after randomly selecting 5 cars for unloading, sampling is performed according to the upper, middle and lower, and the total sample amount is ≥250kg;

[0026] 3) Port pile sampling: side distribution ≥100, upper: middle: lower layer sampling ratio 2:1:1, total sample amount ≥250kg.

[0027] As a further improvement of the application: the step (6) includes the following steps in sample preparation:

[0028] (1) Cross division to ≥2kg, and broken to full pass 3mm sieve by jaw crusher and roller crusher;

[0029] (2) Pile mixing three times, and extracting analysis sample ≥100g by "thirteen point" method, and the remaining ≥500g is stored sample;

[0030] (3) Analysis sample is dried in a 105℃±5℃ oven, and the material is turned over once during the drying process;

[0031] (4) Grinding sample: grinding for 20s first, and then grinding for 10s, and sieving to 0.2mm;

[0032] (5) Preparing submission sample ≥60g, and the rest is station sample;

[0033] (6) Analysis sample is sealed and barcoded or signed, and the sample preparation time is recorded.

[0034] As a further improvement of the application: the step (6) in sample preparation further includes the following steps:

[0035] Analysis sample drying operation method: set the temperature to 105℃±5℃ by pressing the drying box start button, control the baking time according to the moisture content of the material, open the door and put the analysis sample tray into the oven, press the analysis sample bar code on the bottom of the analysis sample tray, close the door, turn over the sample ≥1 time during the baking process, take out the analysis sample tray after drying, turn off the power after the drying box is used, sieve the analysis sample to 0.2mm, and pack the analysis sample according to the sieving and packing requirements.

[0036] As a further improvement of the application: the physical experiment standard in step (6) includes:

[0037] (1) Particle size screening: sample amount ≥250kg, weigh and calculate the proportion of each particle size after screening;

[0038] (2) Drum strength: 50kg (>60mm coke) is fed into the drum at 100 revolutions (4min±10s), calculate M. 40 M 10 The percentage should be recorded, and any abnormalities should be reported promptly.

[0039] As a further improvement of the present invention: the calculation of medium particle size fraction in the physical experiment of coke during sample preparation in step (6) is as follows:

[0040]

[0041] In the formula:

[0042] Si: Percentage of each particle size fraction sieved, %;

[0043] mi: Mass of each particle size sample, kg;

[0044] m: Total mass of the sample, kg;

[0045] i: Range of values ​​for each particle size.

[0046] As a further improvement of the present invention: the coke physical experiment in step (6) includes a drum strength test, which includes the following steps:

[0047] ① Clean the residual coke inside the drum;

[0048] ② Equipped with a rotary drum, the total mass of the drum is 50kg;

[0049] ③ Carefully place the drum sample into the drum and tighten the drum cover screws. Set the drum rotation to 100 revolutions and start the drum machine.

[0050] ④ After the drum stops rotating, let it stand for 1-2 minutes to allow the dust to settle.

[0051] ⑤ Open the drum cover, pour out the coke, and carefully clean the coke powder inside the drum;

[0052] ⑥ Place the coke from the drum into the sieve behind the drum for sieving. After running 15 rounds, perform manual sieving. The amount of coke entering the sieve each time should not exceed 15 kg.

[0053] ⑦ Weigh the coke of three particle sizes: +40mm, -40+10mm, and -10mm respectively. If the difference between the weight exiting the drum and the weight entering the drum exceeds ±0.3kg, the test is invalid. The loss is included in the mass of the -10mm coke. Calculate the proportion using the formulas for drum M40 and M10, and record the data.

[0054] ⑧ Promptly report any abnormalities in the drum rotation results or significant differences between batches.

[0055] As a further improvement of the present invention: the calculation formulas for the drum strength M40 and M10 of the coke physical experiment in step (6) are as follows:

[0056]

[0057] As a further improvement of the present application: the sample preparation in step (7) includes whole grain level screening, drum, Ad, Vdaf, Std, Mt, K2O, Na2O, Zn, Pb, heat value and thermal performance.

[0058] As a further improvement of the present application: the quality dispute processing procedure is: quality inspection notifies marketing department, production plant, company supervisor four parties on-site processing, taking the average value as the processing result; if the supplier still has objection, commercial arbitration can be applied, organized by the marketing department.

[0059] As a further improvement of the present application: in the determination step, the part exceeding the tolerance is settled by deducting the amount according to the contract agreed standard.

[0060] As a further improvement of the present application: the settlement is automatically generated by the system, and the financial department completes the settlement of the amount of money according to the settlement sheet.

[0061] As a further improvement of the present application: all sampling, sample preparation, testing, determination and dispute processing procedures are performed according to the steps of the method, to ensure the controllability of the testing process and the consistency of the operation method.

[0062] Compared with the prior art, the present application has the beneficial effects that: by standardizing and unifying the sampling, sample preparation and testing process of coke into the plant, the testing deviation problem caused by the multiple operation links and different methods is solved, the controllability of the testing process and the accuracy of the results are significantly improved, the human operation error rate is reduced, thereby effectively avoiding the situation that the production is misled, the settlement is affected or the legal rights and interests of the supply and demand parties are damaged due to inaccurate testing data, and the authority of the company's testing system and the credibility of the testing results in internal decision-making and external settlement are enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0063] In order to more clearly illustrate the technical solutions, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0064] Figure 1 The flowchart of the present application. DETAILED DESCRIPTION

[0065] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0066] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units need not be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0067] Steel enterprises generally through the chemical composition of the coke into the factory (such as volatile matter, ash, fixed carbon, etc.), particle size distribution (often according to ≥60mm, 40-60mm, 25-40mm, <25mm classification), mechanical strength index (such as drum strength, wear resistance index) and thermal performance and other projects for testing and determination. The common operating procedures include coke into the factory registration → grouping → visual inspection → sampling (manual or mechanical) → sample preparation (reduction, crushing, grinding, sieving, drying) → physical experiment → testing → determination → quality dispute processing and settlement. There are obvious particle size stratification, mixed loading or hidden quality differences (such as stratified loading, local impurities) in the coke batch, and the conventional sampling point and sampling amount are difficult to fully reflect the true distribution of the whole pile or the whole vehicle, resulting in deviation of the test results. Sampling (shoveling, throwing shovel, selection of side door / center door), reduction, crushing and grinding and other steps are highly dependent on the skills and experience of the operators, and non-standard or inconsistent operation will introduce systematic errors and amplify detection fluctuations. Dust loss during drumming and sieving, sample contamination (containing impurities), equipment residue, and loose weighing / sealing will cause quality measurement deviation or sample contamination, affecting the accuracy and traceability of the test. Complete testing (especially chemical, calorific value and other items) requires time, and if the test process cannot quickly and reliably reflect the true quality, it will lead to production adjustment lag, redundant cost or unreasonable settlement. Differences in different laboratories, equipment sensitivity and calibration state, determination algorithm (such as M40, M10 calculation) or understanding of contract tolerance will lead to inconsistent conclusions for the same batch at different points, inducing disputes. The current treatment method based on on-site "four-party average" or re-inspection / sending to a third party may cause new disputes or delay settlement due to the selection of participants, sample allocation and opaque arbitration procedures. Coke consumption is large and the price is high (coke cost accounts for 20%-30% of total steel cost), so the economic impact of sample misjudgment is significant; at the same time, manual sampling, loading, crushing and other processes have occupational safety and environmental (dust) problems, increasing the difficulty of execution.

[0068] In order to solve the above problems, the present application provides a method for quality inspection of purchased coke, which comprises the steps of coke into the factory, grouping, checking information, quality visual inspection, sampling, sample preparation, testing, determination, and quality dispute processing and settlement. By improving the test process and refining the sampling and sample preparation operation standards, the controllability of the coke quality inspection process and the uniformity of the sampling and sample preparation operation methods are improved, and the coke quality inspection is timely and accurate, thereby solving the problems of too many operation links in the existing coke quality inspection, inconsistent sampling and sample preparation operation methods, easy deviation of test results, inaccurate test data, misleading production, affecting normal settlement of coke and legal interests of both supply and demand sides.

[0069] The application is further described in combination with the drawings and examples, including the following steps: coke entering the factory, sampling by the quality inspection according to the information provided by the user, including the date of entering the factory, product name, supplier, car number, car number, and card number; presetting a group, the same product name, the same supplier, and the same day entering the factory as a group; checking the sampling information, checking the car number, product name, and supplier, and sampling after no error; quality visual inspection, particle size, color, moisture, inclusion, impurity content, and mixed loading visual inspection on the surface of the car or pile, and continue after no abnormality; sampling: starting quality objection processing when abnormality is found; sample preparation: preparing analysis samples according to the physical experiment standard, and starting quality objection processing when abnormality is found; testing: testing according to the items specified in the contract standard; judgment: making qualified / unqualified judgment according to the contract tolerance, and deducting or adding the amount according to the contract for the part exceeding the tolerance; quality objection processing: the supplier can apply for reinspection or third-party inspection when having objection to the result, and settling according to the arbitration result; settlement: generating a settlement sheet.

[0070] As a specific embodiment of the application, the application provides a quality inspection method for purchased coke, including the steps of coke entering the factory, grouping, checking information, quality visual inspection, sampling, sample preparation, testing, judgment, quality objection processing, and settlement, etc., improving the inspection process, and refining the sampling and sample preparation operation standards, so as to improve the controllability of the coke quality inspection process and the uniformity of the sampling and sample preparation operation methods, and ensure the timely and accurate coke quality inspection, and the specific steps are as follows:

[0071] 1. The inspection process includes the steps of coke entering the factory, grouping, checking information, quality visual inspection, sampling, sample preparation, testing, judgment, and quality objection processing and settlement, etc.

[0072] 1) coke entering the factory: after the coke enters the factory, the user is responsible for notifying the quality inspection to sample, and accurately providing the information of the date of entering the factory, product name, supplier, car number, and car number / card number, etc.

[0073] 2) grouping: the quality inspection groups according to the sampling information provided by the production plant (the date of entering the factory, product name, supplier, car number, and car number / card number, etc.), and groups a batch of the same product name, the same unit, and the same day entering the factory;

[0074] 3) checking the sampling information: the car number, product name, and supplier, etc., if the product name is found to be inconsistent with the actual situation or other information is incorrect, stop sampling immediately, and verify or correct with the production plant, and continue sampling after correction;

[0075] 4) quality visual inspection: quality visual inspection (particle size, color, moisture, inclusion / impurity content, and mixed loading, etc.) on the surface of the car or pile, and continue sampling after no abnormality is found;

[0076] 5) Sampling: manual sampling (sampling during unloading, belt sampling, stockpile sampling), mechanical sampling (head of belt sampling, middle of belt sampling), stop sampling immediately if quality abnormalities are found, organize relevant units to handle quality disputes on site, continue sampling after the treatment results are agreed upon;

[0077] 6) Sample preparation: analysis sample preparation, physical experiments (particle size screening, compressive strength, wear resistance, thermal performance), stop sample preparation immediately if quality abnormalities are found, organize relevant units to handle quality disputes on site, continue sample preparation after the treatment results are agreed upon;

[0078] 7) Testing: test according to the test items specified in the contract standards, and promptly report the test results to the relevant units (marketing department, production plant, quality inspection, and company supervisor), if the supplier has objections to the quality test results, retesting or third-party testing can be conducted, then the quality dispute arbitration process is followed to determine the settlement based on the quality dispute arbitration result;

[0079] 8) Judgment: judge according to the contract standards (qualified, unqualified), deduct the amount according to the contract plus deduction standard for the part exceeding the tolerance;

[0080] 9) Settlement: system production settlement sheet, financial department is responsible for settlement business;

[0081] 2. Quality abnormality definition:

[0082] 1) Particle size abnormality: honeycomb coke, furnace head coke, grape coke (more than 5%), large pieces of coke (more than 100mm) and powder (less than 25mm coke fines) (more than 8%);

[0083] 2) Moisture abnormality: moisture <6%, visually check the moisture penetration by knocking the coke and viewing the cross section;

[0084] 3) Color abnormality: the same batch of coke presents two or more colors, such as: gray, dark gray, black, etc.

[0085] 4) Layering, mixed loading: obvious layering, blocking, hidden loading on the same batch of coke cross section or different vehicles, surface difficult to find quality abnormality;

[0086] 5) Inclusions: non-inspected materials in the inspected materials (such as: bundles of grass, bamboo, mineral powder, coal powder, wood, stone, etc. in coke);

[0087] 3. Coke sampling operation rules:

[0088] 1) Train receiving slot manual sampling: sampling in the car, sampling amount is evenly distributed according to the number of cars, each car is sampled according to the ratio of 3:1:1 from top (top 1m below), middle, bottom (car bottom 0.2m above), 3:1:1, from top to bottom, the middle and lower parts are directly taken by shovel, the upper part is first loosened by shovel and then taken by throwing shovel, 7 cards per door sampling cycle 1 time 5 cars take the middle door 2 cars take the side door, 6 cards per door sampling cycle 1 time 4 cars take the middle door 2 cars take the side door, 5 cards per door sampling cycle 1 time 4 cars take the middle door 1 car take the side door, 4 cards per door sampling cycle 2 times 3 cars take the middle door 1 car take the side door, 3 cards per door sampling cycle 3 times 2 cars take the middle door 1 car take the side door, 2 cards per door sampling cycle 4 times 1 car take the middle door 1 car take the side door, 1 card per door sampling cycle 4 times middle door, side door sampling.

[0089] 2) Coke shed manual sampling: randomly select 5 cars after unloading, and sample at the coke shed according to the upper, middle and lower parts, total sample amount ≥250Kg.

[0090] 3) Port pile manual sampling: after unloading, sample on the side of the pile, with a ratio of 2:1:1 on the upper, middle and lower layers, with ≥100 sampling points and a total sample amount of ≥250Kg;

[0091] 4, coke sample preparation rules:

[0092] 1) First pour the sample on the sample preparation table, gradually divide it to ≥2Kg, and use cross division method to divide it 1 or more times to the required weight. Cross division method: flatten the cone-shaped sample mixed evenly with the sample shovel from the top of the pile to the bottom, forming a circular cake; draw a cross line along the center point of the circular cake, dividing it into 4 sectors; combine the opposite sectors into one part sample, and discard the other opposite sector. Use jaw crusher and roller crusher for step-by-step crushing until all materials pass through 3mm sieve;

[0093] 2) Pile mixing 3 times, the sample shovel is required to be 30cm high from the table, with a 40-60° inclination to the table, against the tip of the pile, and the material is evenly shaken with the sample shovel to form a conical shape; use the thirteen-point method to extract an analysis sample of ≥100g, the thirteen-point sampling method: mix the material evenly, flatten the sample from the top with the sample shovel, and the material thickness should be uniform; use a spoon to take 3 points in front, middle and back of the flattened sample, a total of 9 points; take 1 point at 0, 3, 6 and 9 o'clock directions of the material ring edge, a total of 4 points;

[0094] 3) The remaining is all storage sample ≥500g, which cannot be discarded;

[0095] 4) Analysis sample drying, analysis sample drying operation method: press the drying oven start button to set the temperature to 105℃±5℃, control the baking time according to the dryness of the material; open the oven door and put the analysis sample tray into the oven, press the analysis sample bar code on the bottom of the analysis sample tray; close the oven door, turn the sample ≥1 time during the baking process to reduce the sample drying time; take out the analysis sample tray after drying; turn off the power after the drying oven is used. Grind the sample for 50S, grind the sample for 50S operation method: pour 20-30g of coke powder into the mortar; after covering the mortar, open the upper cover door of the pulverizer, put the mortar into the center of the grinding tray; press the lever device tightly, close the upper cover door, press the start button to start the equipment; after grinding for 20S, press the stop switch, the grinding tray is completely stationary, open the upper cover door, take out the mortar; clean the coke powder in the mortar with a brush; check if there is residual material in the mortar, check if the mortar is intact (cylinder, inner ring, inner wall, sealing ring without missing), if not clean, repeat the above steps; after cleaning the mortar, pour 2 spoons of the original sample into the mortar, grind according to steps 2-6 for more than 10S; put the analysis sample sieve, spoon and brush used for grinding into the sample tray, pour the material in the mortar into the sieve, shake back and forth to make the material contact with the sieve surface, rub the spoon and brush with the material, finally shake the material in the tray back and forth to make the material contact with the tray surface, discard the cleaned sample; pour the analysis sample into the cleaned mortar, set the grinding time according to the grinding requirements of the relevant material. According to the analysis sample screening and bagging requirements, screen all through 0.2mm sieve. Analysis sample screening and bagging operation method: place the analysis sample sieve on the cleaned sample tray; pour the ground sample onto the sieve, gently shake the sieve, gently stir the sample with a brush to make the sample pass through the sieve naturally; prepare two or more bags of analysis sample, the screened sample must be poured back into the mortar and ground for 20S; mix the ground sample in the analysis sample tray, extract the analysis sample according to the sample weight standard by 13-point method for testing, and the remaining part is bagged for station retention;

[0096] 5) Extract ≥60g as sample for testing room, the rest as station retention sample;

[0097] 6) Prepare sample seal and send for testing. Analysis sample seal operation method: seal with analysis sample bag, if there is a barcode paper, paste the barcode paper vertically on the seal of the analysis sample bag (for bottled materials, paste between the cover and the bottle), if there is no barcode paper, the sample preparer must sign and write the sample preparation time on the seal of the analysis sample bag.

[0098] 5, coke physical experiment operation rules:

[0099] 1) Particle size screening:

[0100] ① The amount of screened sample is ≥250kg;

[0101] ② Check if the sieve plate is worn out, check if there is residual material on the sieve plate;

[0102] ③Press the start button, run 1-2 minutes, and then feed (uniform feeding, the feeding amount should not exceed 5 kg) after the equipment runs smoothly;

[0103] ④After all the materials are sieved and it is confirmed that there is no residual material on the sieve plate, press the stop button;

[0104] ⑤Use a rice basket to collect samples according to different particle sizes, weigh them separately, and record the weight data of each particle size (excluding the tare weight);

[0105] ⑥Calculate the proportions of 60 mm, 40-60 mm, 25-40 mm, and <25 mm according to the formula of the percentage of each particle size (Si)%, and record the data;

[0106] ⑦Calculation formula:

[0107]

[0108] In the formula:

[0109] Si----Percentage of each particle size sieve

[0110] mi----Mass of each particle size sample, kg;

[0111] m----Total mass of the sample, kg;

[0112] i----Range value of each particle size

[0113] 2) Drum strength:

[0114] ①Clean the remaining coke in the drum;

[0115] ②Prepare the drum (>60mm coke), and the total mass of coke entering the drum is 50 kg (accurate to 0.1 kg);

[0116] ③Carefully place the drum sample into the drum and tighten the drum cover screws. Set the drum revolution count to 100 revolutions (4 minutes ±10 seconds) and start the drum machine;

[0117] ④After the drum stops, wait for 1-2 minutes to allow the dust to settle;

[0118] ⑤Open the drum cover, pour out the coke, and carefully clean the coke powder in the drum;

[0119] ⑥Put the drum coke into the post-drum sieve for sieving. After running for 15 rounds, perform manual perforation. The amount of coke entering the sieve at each time should not exceed 15 kg;

[0120] ⑦ Respectively weighing +40mm, -40+10mm, -10mm three particle size coke weight (accurate to 0.05kg); drum weight and drum weight difference more than ± 0.3kg, this test is invalid, the loss is included in the -10mm coke quality, M40, M10 calculation formula to calculate the proportion, good data record.

[0121] ⑧ Turn the drum results are abnormal or the difference between the two batches is large (medium 8%, coke 3%) when feedback in time.

[0122] ⑨ Calculation formula:

[0123]

[0124] 6, coke inspection items: full particle size grading, drum, Ad, Vdaf, Std, Mt, K2O, Na2O, Zn, Pb, heat value, thermal performance, etc.

[0125] 7, sample: sample information is checked by the sample personnel, and signed on the sample handover form to confirm, double-locked to the laboratory, and the laboratory input personnel open the box together, supervise the laboratory input personnel to divide the sample, and sign on the laboratory handover sample to confirm, and the laboratory input personnel will reserve the sample together and send it to the sample storage room.

[0126] 8, quality objection processing flow:

[0127] 1) When the quality abnormality is found, the quality inspection is responsible for notifying the relevant units (marketing department, production plant, company supervisor), and the relevant units are on-site to jointly handle, and the average value of four units (quality inspection, marketing department, production plant, company supervisor) is taken as the treatment result. The quality objection processing adheres to the principle of majority over minority;

[0128] 2) The quality inspection is responsible for the system input of the treatment result; the marketing department is responsible for reporting the treatment result to the supplier;

[0129] 3) The personnel of the participating units represent their units for the quality objection, and sign the quality objection treatment opinion to confirm;

[0130] 4) If the supplier still objects to the treatment result, it can apply for commercial arbitration to the company, and the commercial arbitration will be organized by the marketing department.

[0131] This scheme establishes a standardized inspection process from the factory registration to the settlement closed loop, uses batch management, information checking, hierarchical multi-point sampling, standardized reduction and sample preparation, strict physical and chemical testing, and traceable means such as sealing, double transfer, and system input, to form a quality control closed loop.

[0132] Group batch and information check ensure the clear boundary of each test batch, traceable responsibility, avoid sample mismatch or batch confusion; through visual preliminary + hierarchical multi-point sampling rules (wagon top / middle / bottom, pile top / middle / bottom, port side multi-point) to improve sample representativeness, try to cover batch difference (hierarchical, mixed loading, impurities, etc.); adopt clear reduction, crushing, grinding and screening procedures (cross reduction, thirteen-point sampling, drying, full screening 3mm, full screening 0.2mm, etc.) to stabilize the reduction of the original large sample into standard analysis sample, reduce the variation caused by sample preparation; physical test (particle size distribution, drum strength, etc.) and chemical / thermal performance test are carried out simultaneously, and comprehensive quality characterization is constructed from three aspects of mechanics, particle size and chemistry; set up the treatment mechanism of abnormal stop-multiple on-site treatment-arbitration settlement to ensure that when the abnormality is found, the disputed sample can be locked in time and judged based on objective data; through seal, bar code, double handover and system input to ensure that the sample flow is traceable, and the test result can directly drive the settlement system and leave the sample for review or arbitration; link the test result with the contract tolerance, plus and minus payment clause to realize the closed loop of "test-determination-automatic settlement", reduce manual intervention and settlement dispute.

[0133] The main functions of the application are: improving sample representativeness: batch grouping and hierarchical multi-point sampling rules significantly improve the representativeness of the sample taken to the whole vehicle / whole pile, reducing sampling deviation; reducing sample preparation and detection human difference: unified reduction, crushing, grinding and screening standards, standardizing operation methods, reducing systematic errors between different operators; enhancing the accuracy and reliability of test results: multi-dimensional test coverage of physics-chemistry-thermal performance improves the discrimination ability of coke quality and reduces the probability of misjudgment; realizing controllable and traceable test process: information check, bar code seal, double handover and system input ensure that the sample and data flow are traceable and reviewable; improving emergency response and disposal efficiency: abnormal stop and on-site four-party consultation, arbitration mechanism can quickly locate the problem and form an executable treatment opinion, shorten the dispute period; reducing production and settlement losses caused by test errors: accurate test and automatic settlement according to the contract rules can avoid misleading production adjustment and unfair economic penalties; improving the authority of the company's inspection and external credibility: standardized process and rigorous objection handling improve the recognition of test results and reduce the dispute rate of suppliers; support management decision and cost control: fast and reliable test data provide basis for production adjustment, procurement evaluation and cost accounting, which is conducive to controlling coke procurement cost (great influence on profit); conducive to safety and environmental management: standardized sampling and sample preparation reduce arbitrary operation, reduce dust and occupational risk, and are conducive to on-site safety and environmental control; facilitate long-term quality management and continuous improvement: systematic recording and sample retention system provide basic data for trend analysis, supplier evaluation and optimization of sampling / testing scheme.

[0134] In summary, the person skilled in the art can make other corresponding transformation schemes according to the technical scheme and technical concept of the present application without creative mental labor after reading the present application file, and all of them belong to the protection scope of the present application.

Claims

1. A rapid method for testing the quality of coke, characterized in that, Includes the following steps: (1) When coke arrives at the plant, the user unit shall notify the quality inspection department to take samples and provide information such as the date of arrival, product name, supplier, vehicle number, number of vehicles, and number of cards. (2) Coke that is pre-selected as a batch, has the same product name, is from the same supplier, and arrives at the factory on the same day is considered as a batch. (3) Verify the sampling information, including vehicle number, product name, and supplier. Sampling can only be carried out after the information is correct. (4) Visual inspection of quality: visually inspect the surface of the car body or stockpile for particle size, color, moisture, inclusions, impurities and mixed loading. Continue if no abnormalities are found. (5) Sampling: Initiate quality objection handling when an anomaly is found; (6) Sample preparation: Prepare analytical samples according to physical experimental standards, and initiate quality objection handling when abnormalities are found; (7) Laboratory tests shall be conducted in accordance with the items specified in the contract standards; (8) Judgment: Determine whether the product is qualified or unqualified based on the contract tolerance, and deduct the amount for the excess portion according to the contract. (9) Handling of quality objections: If the supplier has objections to the results, it may apply for re-inspection or third-party inspection, and settle the settlement according to the arbitration results. (10) Settlement, generate settlement statement.

2. The rapid coke quality testing method according to claim 1, characterized in that, The quality inspection in step (4) includes quality anomalies, and the quality anomaly judgment includes: ① Abnormal particle size: honeycomb coke, furnace head coke, grape coke exceeding 5%, large pieces >100mm or powder <25mm exceeding 8%; ② Abnormal moisture content: Moisture content <6%, and the determination is made by visually inspecting the immersion of the cross-section; ③ Color abnormality: Two or more colors appear in the same batch; ④ Layered or mixed loading: The cross-section shows obvious upper and lower layers or concealed loading. ⑤ Contains impurities: Non-coke substances are present.

3. The rapid coke quality testing method according to claim 2, characterized in that, In step ⑤, the substances in the material being tested that are not the material being tested include straw bales, bamboo rafts, mineral powder, coal powder, wood, and stones in the coke.

4. The rapid coke quality testing method according to claim 1, characterized in that, Step (5) sampling includes manual sampling, which includes the following steps: 1) Sampling inside train cars: Sampling points are distributed in the top, middle and bottom of each car in a ratio of 3:1:

1. The sampling ratio between the side doors and the middle door is determined cyclically according to the number of cards. 2) Sampling at the coke shed: After unloading 5 trucks, samples were taken from the top, middle and bottom of the trucks, with a total sample size of ≥250kg. 3) Sampling of port stockpiles: ≥100 sampling points on the side, with sampling ratio of 2:1:1 for the upper:middle:lower layers, and a total sample volume of ≥250kg.

5. The rapid coke quality testing method according to claim 1, characterized in that, The sample preparation step (6) includes the following steps: (1) Reduce the cross section to ≥2kg, and crush it with a jaw crusher and a double roll crusher until it passes through a 3mm sieve; (2) The mixture was mixed three times, and ≥100g of the analytical sample was extracted using the "thirteen-point" method. The remaining ≥500g was used as the sample for future reference. (3) The analytical sample was dried in an oven at 105℃±5℃, and turned over once during the drying process; (4) Grinding the sample: first grind for 20 seconds, then grind for 10 seconds, and sieve to 0.2 mm; (5) Prepare ≥60g of sample for testing, and keep the remainder as a sample for the station; (6) Analyze the sample seal and affix a barcode or signature, and record the sample preparation time.

6. The rapid coke quality testing method according to claim 1, characterized in that, The sample preparation step (6) also includes the following steps: Analytical sample drying procedure: Press the start button of the drying oven and set the temperature to 105℃±5℃. Control the drying time according to the dryness of the material. Open the oven door and place the analytical sample tray into the oven, pressing the analytical sample barcode on the bottom of the tray. Close the oven door. During the drying process, the sample needs to be turned over at least once. Remove the analytical sample tray after drying. Turn off the power after using the drying oven. According to the requirements for sieving and bagging the analytical sample, all samples should be sieved through a 0.2mm sieve. Perform sieving and bagging of the analytical sample. Pour the ground sample into the analytical sample tray and mix well. Use the 13-point method to extract the analytical sample according to the sample weight standard and send it for testing. The remaining sample should be bagged and retained at the station.

7. The rapid coke quality testing method according to claim 6, characterized in that, The physical experimental standards for sample preparation in step (6) include: (1) Particle size sieving: Sample size ≥ 250 kg, weigh after sieving and calculate the proportion of each particle size; (2) Drum strength: 50kg (>60mm coke) is fed into the drum at 100 revolutions (4min±10s), calculate M. 40 M 10 The percentage should be recorded, and any abnormalities should be reported promptly.

8. The rapid coke quality testing method according to claim 7, characterized in that, The calculation of medium particle size fraction in the physical experiment of coke during sample preparation in step (6) is as follows: In the formula: Si: Percentage of each particle size fraction sieved, %; mi: Mass of each particle size sample, kg; m: Total mass of the sample, kg; i: Range of values ​​for each particle size.

9. A rapid coke quality testing method according to claim 8, characterized in that, The sample preparation step (6) includes a drum strength test in the physical experiment of coke, which includes the following steps: ① Clean the residual coke inside the drum; ② Equipped with a rotary drum, the total mass of the drum is 50kg; ③ Carefully place the drum sample into the drum and tighten the drum cover screws. Set the drum rotation to 100 revolutions and start the drum machine. ④ After the drum stops rotating, let it stand for 1-2 minutes to allow the dust to settle. ⑤ Open the drum cover, pour out the coke, and carefully clean the coke powder inside the drum; ⑥ Place the coke from the drum into the sieve behind the drum for sieving. After running 15 rounds, perform manual sieving. The amount of coke entering the sieve each time should not exceed 15 kg. ⑦ Weigh the coke of three particle sizes: +40mm, -40+10mm, and -10mm respectively. If the difference between the weight exiting the drum and the weight entering the drum exceeds ±0.3kg, the test is invalid. The loss is included in the mass of the -10mm coke. Calculate the proportion using the formulas for drum M40 and M10, and record the data. ⑧ Promptly report any abnormalities in the drum rotation results or significant differences between batches.

10. A rapid coke quality testing method according to claim 1, characterized in that, The analysis in step (7) of sample preparation includes full-size sieving, drum testing, Ad, Vdaf, Std, Mt, K2O, Na2O, Zn, Pb, calorific value, and thermal properties.

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