Sintered ore quality inspection method

Abstract

The invention discloses a sinter quality inspection method. Physical and mechanical performance inspection is mainly used for evaluating particle size distribution and wear resistance strength of sinter through size fraction screening and drum strength testing. A vibrating screen is adopted for size fraction screening, the weight of each size fraction is accurately weighed, the screening index is determined, samples of 40-25 mm, 25-16 mm and 16-10 mm in size fraction are prepared according to the preset proportion, the weight of each size fraction is accurately controlled through a static weighing method, the weight deviation of the previous size fraction is compensated in an accumulated mode, the matching accuracy is ensured, personal errors are effectively reduced, and the screening efficiency is improved. The reliability of a test result is improved; the chemical component inspection comprises the step of determining the contents of various elements in the sintered ore through cleaning, crushing, division, sample grinding and chemical component analysis. The problem that blast furnace ironmaking is affected by large deviation of inspection results due to different operation methods of personnel can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sinter quality inspection, and particularly to a sinter quality inspection method. Background Art

[0002] Sinter is the main raw material used in blast furnace ironmaking. In order to improve the quality of molten iron and ensure the stable operation of blast furnace production, the blast furnace main control needs to timely know the quality of sinter. The quality indicators of sinter mainly include two aspects: chemical composition and physical and mechanical properties. A product whose individual indicators included in both aspects meet the regulations of the metallurgical industry standard is judged as qualified, and any unqualified indicator is judged as unqualified. In terms of chemical composition, when the TFe of sinter increases by 1%, the coke ratio of the blast furnace decreases by 2% and the output increases by 3%; when the fluctuation ranges of TFe and R are small, the blast furnace output increases and the coke ratio decreases; when the sulfur content of sinter increases, the coke ratio increases. In terms of physical and mechanical properties, an increase in strength and a decrease in powder content are beneficial to improving the air permeability of the blast furnace; in terms of reducibility, the improvement of the reducibility of sinter (decrease in FeO) results in a decrease in the coke ratio of the blast furnace.

[0003] Therefore, how to do a good job in the quality inspection of sinter and provide timely and accurate data support for blast furnace production is the key to ensuring the stable and smooth operation of the company's production. With the continuous progress of technology, some enterprises have begun to use fully automatic sample preparation systems. However, due to the high investment cost of fully automatic sample preparation systems, most iron and steel enterprises still rely on manual and single mechanical equipment for sampling and sample preparation, such as belt head samplers, crushers, sample grinders, screening machines, drum machines, etc. Due to the different work responsibilities and operation methods of each person, there are often large deviations in the inspection results caused by non-standard operations, affecting blast furnace ironmaking. Summary of the Invention

[0004] In order to overcome the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a sinter quality inspection method to solve the problem that the existing large deviation in inspection results caused by different operation methods of on-site personnel affects blast furnace ironmaking.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a sinter quality inspection method, including:

[0006] Physical and Mechanical Property Inspection:

[0007] 1) Particle Size Screening:

[0008] Start the vibrating screen, feed ≤ 15 kg each time, and divide the sample into six particle size grades of sinter: +40 mm, 40 mm - 25 mm, 25 mm - 16 mm, 16 mm - 10 mm, 10 - 5 mm, and -5 mm;

[0009] After screening, weigh the weights of each particle size grade of sinter respectively;

[0010] Calculate and record the percentage of the mass of sinter in each particle size fraction in the total feed sample;

[0011] Draw a particle size distribution curve, and record the percentage of the mass of sinter less than 5 mm as the screening index;

[0012] 2) Tumbler strength:

[0013] Set the screening ratios for three particle size fractions of 40 - 25 mm, 25 - 16 mm, and 16 - 10 mm, and determine the theoretical formulated weights and the latest weight correction values for each particle size fraction;

[0014] First, prepare the 40 - 25 mm sinter. Weigh the sample in real - time statically, detect the difference between the theoretical formulated weight and the latest weight correction value, stop feeding, read the actual weighed value, and determine the weight deviation value for 40 - 25 mm;

[0015] Repeat the steps to prepare the 25 - 16 mm sinter, and compensate the latest weight correction value for 25 - 16 mm with the weight deviation value of 40 - 25 mm to obtain the weight deviation value for 25 - 16 mm;

[0016] Repeat the steps to prepare the 16 - 10 mm sinter, and compensate the latest weight correction value with the weight deviation values of 40 - 25 mm and 25 - 16 mm;

[0017] Put the samples of each particle size fraction into the tumbler, rotate at a speed of 25 ± 1 r / min for 200 - 270 revolutions, let it stand for 2 - 4 minutes in a sealed state to allow the dust to settle, then open the discharge port to release the sample, and screen the sample to 6.3 mm and 0.5 mm after discharging from the drum;

[0018] Weigh the three parts of the sample of +6.3 mm, 6.3 mm - 0.5 mm, and -0.5 mm, record them as m1, m2, and m3 respectively, and calculate the tumbler index and abrasion resistance index;

[0019] Chemical composition inspection:

[0020] Clean the sample preparation items with the original sample. The sample is crushed using a combined sample reduction and preparation machine, with the reduction being ≥500 g, and crushed step - by - step until all pass through a 1 - mm sieve;

[0021] Heap and mix three times, extract an analytical sample of ≥200 g using the 13 - point method, and discard the remaining sample;

[0022] Grind the sample with a special sintering ore mortar for 100 - 150 seconds, and sieve it according to the requirements for the analytical sample and bagging, with all passing through a 0.125 - mm sieve;

[0023] Extract an analytical sample of ≥120 g and send it to the laboratory by pneumatic conveyor, and keep one bag of ≥80 g as the retained sample;

[0024] The chemical composition detection items include TFe, P, S, SiO2, Al2O3, CaO, MgO, FeO, R, and TiO2.

[0025] As a further improvement of the present invention: it further includes:

[0026] Mechanical sampling: Sampling is carried out by an automatic sampling machine at the head of the belt. Sampling is carried out at least 5 kg every first preset time interval, and samples are received once every second preset time interval based on the set time. After reduction, a chemical analysis sample is taken. The weight ratio of the chemical analysis sample to the physical and mechanical property test sample is 1:2;

[0027] As a further improvement of the present invention: it further includes:

[0028] Manual sampling: When there are equipment failures, shutdowns or maintenance, samples are taken on the stopped belt every second preset time interval. At least six sampling points are determined, the distance between sampling points is greater than 1 m, and the sub-sample amount at each sampling point is ≥5 kg. After reduction, the weight ratio of the chemical analysis sample to the physical and mechanical property test sample is 1:2.

[0029] As a further improvement of the present invention: it further includes:

[0030] Determine the sample data where the difference between the weight m0 of the sample entering the drum and the total weight (m1 + m2 + m3) after screening by the drum is not greater than 1.0%;

[0031] Calculate the historical total weight values before the sample enters the drum and the total weight values after screening by the drum for the three particle size grades of 40 - 25 mm, 25 - 16 mm, and 16 - 10 mm in the sample data;

[0032] Use the difference between the average historical total weight and the average total weight after screening by the drum as the latest total weight correction value.

[0033] As a further improvement of the present invention: The determination of the latest weight correction value includes:

[0034] Determine the latest weight correction values for each particle size grade according to the screening ratios of the three particle size grades of 40 - 25 mm, 25 - 16 mm, and 16 - 10 mm and the latest total weight correction value respectively.

[0035] As a further improvement of the present invention: The drum index is T = m1 / m0 × 100%, and the abrasion resistance index is A = [m0 - (m1 + m2)] / m0 * 100%.

[0036] As a further improvement of the present invention: It further includes: In the chemical composition inspection process, calculate the mass percentages of TFe, CaO / SiO2, FeO, and S respectively, and determine the grades of TFe, CaO / SiO2, FeO, and S according to the set mass percentages.

[0037] As a further improvement of the present invention: it further includes: in the physical and mechanical property inspection, the grades are determined according to the drum index, screening index and abrasion resistance index respectively.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] The physical and mechanical property inspection of the present invention passes strict screening and drum strength tests to ensure that the particle size distribution and abrasion resistance of the sintered ore meet the requirements. Among them, samples of three particle size grades of 40 - 25mm, 25 - 16mm, and 16 - 10mm are prepared according to a preset ratio, and the weight of each particle size grade is precisely controlled. By cumulatively compensating for the weight deviation of the previous particle size grade, the accuracy of the ratio is ensured, effectively reducing human error and improving the reliability of the test results; the chemical composition inspection determines the content of various elements in the sintered ore through cleaning, crushing, quartering, sample grinding and chemical composition analysis. Through precise ratio and strict test procedures, the abrasion resistance of the sintered ore can be more effectively evaluated, providing reliable data support for optimizing the sintered ore ratio and improving the blast furnace smelting efficiency; at the same time, reducing human error improves the consistency of the detection results, facilitating data analysis and quality control, and can solve the problem that different operation methods of personnel lead to large deviations in inspection results, affecting blast furnace ironmaking. Description of the Drawings

[0040] Figure 1 It is a schematic diagram of a method for inspecting the quality of sintered ore according to the present invention.

[0041] Figure 2 It is a schematic diagram of quality determination of a method for inspecting the quality of sintered ore according to the present invention. Detailed Embodiments

[0042] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the specific embodiments and corresponding drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0043] To solve the technical problems in the prior art, the present invention will be further described below in conjunction with the description of the drawings and embodiments:

[0044] As Figures 1 to 2 shown, the embodiment of the present invention discloses a method for inspecting the quality of sintered ore, including:

[0045] Physical and mechanical property inspection:

[0046] 1) Particle size screening:

[0047] Start the vibrating screen, feed ≤ 15 kg each time, and divide the sample into 6 particle size grades of sintered ore: +40 mm, 40 mm - 25 mm, 25 mm - 16 mm, 16 mm - 10 mm, 10 - 5 mm, and -5 mm;

[0048] After screening, weigh the weight of sintered ore for each particle size grade respectively;

[0049] Calculate and record the percentage of the mass of sintered ore for each particle size grade in the total amount of the feed sample;

[0050] Draw a particle size distribution curve, and record the mass percentage of sintered ore less than 5 mm as the screening index;

[0051] 2) Tumbler strength:

[0052] Set the screening ratios for three particle size grades: 40 - 25 mm, 25 - 16 mm, and 16 - 10 mm, and determine the theoretical formulated weight and the latest weight correction value for each particle size grade;

[0053] First, prepare the 40 - 25 mm sintered ore. Weigh the sample in real - time statically, detect the difference between the theoretical formulated weight and the latest weight correction value, stop feeding, read the actual weighed value, and determine the weight deviation value of 40 - 25 mm;

[0054] Repeat the steps to prepare the 25 - 16 mm sintered ore, and compensate the latest weight correction value of 25 - 16 mm with the weight deviation value of 40 - 25 mm to obtain the weight deviation value of 25 - 16 mm;

[0055] Repeat the steps to prepare the 16 - 10 mm sintered ore, and compensate the latest weight correction value with the weight deviation value of 40 - 25 mm and the weight deviation value of 25 - 16 mm;

[0056] Put the samples of each particle size grade into the tumbler, rotate at a speed of 25 ± 1 r / min for 200 - 270 revolutions, let it stand for 2 - 4 minutes in a sealed state, open the discharge port to release the sample after the dust has settled, and screen to 6.3 mm and 0.5 mm particle sizes after discharging from the drum;

[0057] Weigh the three parts of the sample: +6.3 mm, 6.3 mm - 0.5 mm, and -0.5 mm, record them as m1, m2, and m3 respectively, and calculate the tumbler index and the abrasion resistance index;

[0058] Chemical composition inspection:

[0059] Clean the sample preparation items with the original sample. The sample is crushed using a combined sample reduction and preparation machine, the sample reduction is ≥ 500 g, and it is gradually crushed through a 1 - mm sieve;

[0060] Heap and mix three times, extract an analytical sample of ≥ 200 g using the 13 - point method, and discard the remaining sample;

[0061] Grind the sample with a special sintered ore mortar for 100 - 150 seconds, and screen it according to the requirements of the analysis sample and bagging, and all pass through a 0.125 mm sieve;

[0062] Extract an analysis sample of ≥120 g and send it to the laboratory by pneumatic conveyance, and keep the remaining 1 bag of ≥80 g as the retention sample;

[0063] The chemical composition detection items include TFe, P, S, SiO2, Al2O3, CaO, MgO, FeO, R, TiO2.

[0064] The present invention consists of three major parts: a sampling process, a sample preparation process, and a quality determination process. The sampling process includes mechanical sampling and manual sampling. The sample preparation process includes sample preparation for physical and mechanical properties and sample preparation for chemical composition. The determination process mainly conducts quality determination on the chemical composition and mechanical properties of the material according to the relevant regulations of the metallurgical industry standard, and timely feeds back the results to the blast furnace master control room to provide timely and accurate data support for blast furnace production.

[0065] In some embodiments, it further includes:

[0066] Mechanical sampling: Sampling is carried out by an automatic sampling machine at the head of the belt. Sampling is ≥5 kg every first preset time interval, and samples are received every second preset time interval based on the set time. The chemical analysis sample is obtained by quartering. The weight ratio of the chemical analysis sample to the physical and mechanical property test sample is 1:2.

[0067] In some embodiments, it further includes:

[0068] Manual sampling: When there is equipment failure, shutdown or maintenance, samples are taken on the stopped belt every second preset time interval. At least six sampling points are determined, the distance between sampling points is greater than 1 m, the sub-sample amount at each sampling point is ≥5 kg, and the weight ratio of the quartered chemical analysis sample to the physical and mechanical property test sample is 1:2.

[0069] In some embodiments, it further includes:

[0070] Determine the sample data where the difference between the weight m0 of the sample entering the drum and the total weight (m1 + m2 + m3) after screening by the drum is not greater than 1.0%;

[0071] Calculate the historical total weight values and the total weight values after screening by the drum of the samples in the three particle size grades of 40 - 25 mm, 25 - 16 mm, and 16 - 10 mm before entering the drum in the sample data;

[0072] Use the difference between the average historical total weight and the average total weight after screening by the drum as the latest total weight correction value.

[0073] In some embodiments, the determination of the latest weight correction value includes:

[0074] Determine the latest weight correction value for each particle size according to the screening ratios of three particle size grades of 40 - 25 mm, 25 - 16 mm, and 16 - 10 mm and the latest total weight correction value respectively.

[0075] In some embodiments, the drum index is T = m1 / m0×100%, and the abrasion resistance index is A = [m0 - (m1 + m2)] / m0*100%.

[0076] In some embodiments, it further includes: in the chemical composition inspection process, calculate the mass percentages of TFe, CaO / SiO2, FeO, and S respectively, and determine the grades of TFe, CaO / SiO2, FeO, and S according to the set mass percentages.

[0077] In some embodiments, it further includes: in the physical and mechanical properties inspection, determine the grades according to the drum index, screening index, and abrasion resistance index respectively.

[0078] Example:

[0079] Mechanical sampling operation method: Sampling is carried out by an automatic sampling machine at the head of the belt. Take 1 sub - sample (≥5 kg) every 30 minutes, and connect the samples every 3 hours based on 12:00 am. After quartering, ≥10 kg is taken as the chemical analysis sample for return to the station for preparation, and the remaining ≥20 kg is retained as the screening drum sample (physical and mechanical properties test sample).

[0080] Manual sampling operation method: When the equipment fails or is under maintenance, manual sampling is carried out. Sampling is done once every 3 hours. Sampling is to stop the belt and use a flat - headed shovel to sample on the belt. Take ≥6 points, and the sub - sample amount at each point is ≥5 kg. The interval between sampling points must be greater than 1 meter. When sampling, it is required to shovel all the materials on the entire belt cross - section. After quartering, ≥10 kg is taken as the chemical analysis sample for return to the station for preparation, and the remaining ≥20 kg is retained as the screening drum sample (physical and mechanical properties test sample).

[0081] Physical and mechanical properties sample preparation method: Do the screening drum twice a day, at 1:00 and 13:00 respectively, as follows:

[0082] 1) Particle size screening operation method (screening index):

[0083] ① Clean the equipment and the remaining materials in the sample bucket;

[0084] ② Start the vibrating screen, and feed ≤15 kg each time. Divide the sample into 6 particle size grades of sintered ore: +40 mm, 40 mm - 25 mm, 25 mm - 16 mm, 16 mm - 10 mm, 10 - 5 mm, and -5 mm;

[0085] ③ After screening, weigh the weight of the sintered ore for each particle size grade (accurate to 0.1 kg), calculate the percentage of the mass of the sintered ore for each particle size grade in the total amount, and make a record;

[0086] ④Among them, the mass percentage of sinter less than 5 mm is the screening index.

[0087] 2) Sample preparation method for drum strength (drum index, abrasion resistance index):

[0088] ①Prepare the drum (prepared by screening ratios of three particle size grades: 40 - 25 mm, 25 - 16 mm, 16 - 10 mm), and the mass into the drum is 15 ± 0.15 kg;

[0089] ②After the sample is placed in the drum, cover the discharge port cover plate, rotate at a speed of 25 ± 1 r / min for 200 revolutions, and let it stand for 2 min in a sealed state to allow the dust to settle, then open the discharge port to release the sample;

[0090] ③After taking out the drum, make particle sizes of 6.3 mm and 0.5 mm;

[0091] ④Classify the screened materials of the above particle size grades into three parts of samples: +6.3 mm, 6.3 mm - 0.5 mm, and -0.5 mm, and weigh them as m1, m2, and m3 respectively, and record the data;

[0092] ⑤Error requirement: The difference between the weight of the sample into the drum m0 and the total weight of the screening after the drum (m1 + m2 + m3) shall not be greater than 1.0%, that is, [m0 - (m1 + m2 + m3)] / m0 * 100% ≤ 1.0%. For any test sample with a difference greater than 1.0%, the test shall be redone;

[0093] ⑥Calculation formula: Drum index: T = m1 / m0 × 100%;

[0094] Abrasion resistance index: A = [m0 - (m1 + m2)] / m0 * 100%

[0095] 6. Sample preparation method for chemical composition:

[0096] 1) Check the sample preparation information: If there is no abnormality in the sample preparation information {sintering plant information (No. 1 sintering, No. 2 sintering) and time periods (0:00, 3:00, 6:00, 9:00, 12:00, 15:00, 18:00, 21:00)}, start sample preparation.

[0097] 2) Sample preparation:

[0098] ①Cleaning: Clean all the sample preparation items with the original sample (sample preparation table, sample production, sieve, equipment, and sample grinding mortar, etc.).

[0099] ②Use the "combined sample reduction and preparation machine" for crushing, and load the samples in the 2nd and 3rd drawers (the drawers for the crusher to receive samples) for sample preparation (discard the samples in the 1st drawer);

[0100] ③ After mixing evenly, gradually reduce the sample size to ≥500 g, and crush it step by step until all particles pass through a 1-mm sieve.

[0101] ④ Pile and mix three times, extract an analytical sample of ≥200 g by the 13-point method, and discard the remaining samples.

[0102] ⑤ Grind the sample in a special sintered ore mortar for 100 - 150 seconds, and sieve it according to the requirements of the analytical sample and bagging, ensuring that all particles pass through a 0.125-mm sieve.

[0103] ⑥ Extract an analytical sample of ≥120 g and send it to the laboratory by pneumatic conveyance. Keep one bag of the remaining sample with a weight of ≥80 g.

[0104] ⑦ Chemical composition detection items include: TFe, P, S, SiO2, Al2O3, CaO, MgO, FeO, R, TiO2, etc.

[0105] 7. Quality determination operation method:

[0106] 1) Determine the quality of the sintered ore according to the metallurgical industry standard (or the standard base value set within the company). The determination is divided into three grades, namely: qualified (first-class product, second-class product) and unqualified. Details are shown in the following table:

[0107] 2) The determination method uses the system automatic determination method, that is: set the relevant standard reference values (defining criteria) in the system. After the post personnel enter the test results into the system and confirm and submit them, the system automatically grades the quality of the sintered ore according to the defining criteria; then automatically calculates the qualified rate of the sintered ore quality according to the grading result (Sintered ore qualified rate calculation formula: qualified quantity / output * 100% = qualified rate).

[0108] Through the above scientific and effective sintered ore quality inspection process, guide the post personnel to take and prepare samples, standardize the operation process, unify the operation methods, and narrow the error range, so as to solve the problem that the existing operation methods of post personnel are inconsistent, resulting in large deviations in test results and affecting blast furnace ironmaking. It improves the efficiency of standardized operation, reduces operation errors, and avoids the situation that the results are deviated due to inconsistent operation methods and affects blast furnace production; it improves the accuracy of test results and provides timely and accurate data support for blast furnace production and smelting.

[0109] In summary, after reading the documents of the present invention, those of ordinary skill in the art can make various corresponding transformation schemes without creative mental labor according to the technical solutions and technical concepts of the present invention, and all of them belong to the scope protected by the present invention.

Claims

1. A method for inspecting the quality of sintered ore, characterized in that: include: Physical and mechanical properties test: 1) Particle size screening: Start the vibrating screen, feed ≤15kg each time, and divide the sample into 6 particle sizes of sintered ore: +40mm, 40mm-25mm, 25mm-16mm, 16mm-10mm, 10-5mm, -5mm; After screening, weigh the weight of sintered ore of each particle size; Calculate and record the percentage of the mass of sintered ore of each particle size in the total amount of feed sample; Draw a particle size distribution curve, and record the mass percentage of sintered ore less than 5 mm as the screening index; 2) Drum strength: Set the three particle size screening ratios of 40-25mm, 25-16mm, and 16-10mm, and determine the theoretical preparation weight and the latest weight correction value of each particle size; First, prepare 40-25mm sintered ore, weigh the sample in real time on a static scale, detect the difference between the theoretical prepared weight and the latest weight correction value, stop feeding, read the actual weighing value, and determine the weight deviation value of 40-25mm; Repeat the steps to prepare 25-16mm sintered ore, and use the weight deviation value of 40-25mm to compensate the latest weight correction value of 25-16m to obtain the weight deviation value of 25-16mm; Repeat the steps to prepare 16-10mm sintered ore, and compensate the latest weight correction value with the weight deviation value of 40-25mm and the weight deviation value of 25-16m; Put the samples of each particle size into the drum, rotate it at a speed of 25±1r / min for 200 to 270 revolutions, and let it stand for 2min to 4min in a sealed state. After the dust settles, open the discharge port to release the sample. After exiting the drum, make 6.3mm and 0.5mm particle sizes; Weigh the three parts of the sample with diameters of +6.3mm, 6.3mm-0.5mm and -0.5mm, record them as m1, m2 and m3 respectively, and calculate the drum index and anti-wear index; Chemical composition test: Wash the sample preparation items with the original sample, and crush the sample using a reduction and combined sample preparation machine, with the reduction being ≥500g, and crushing step by step to pass through a 1mm sieve; The heap was mixed three times, and the 13-point method was used to extract and analyze samples ≥ 200 g, and the remaining samples were discarded; Grind the sample with a special bowl for sintered ore for 100-150 seconds, and pass it through a 0.125mm sieve according to the requirements of sieving and bagging the analysis sample; Extract analysis sample ≥120g and send it to the laboratory by air, and keep the remaining sample in one bag ≥80g; Chemical composition testing items include TFe, P, S, SiO2, Al2O3, CaO, MgO, FeO, R, and TiO2.

2. A sintered ore quality inspection method according to claim 1, characterized in that: Also includes: Mechanical sampling: automatic sampling machine at the belt head is used for sampling, sampling ≥5kg at the first preset time interval, and one sample is taken at the second preset time interval based on the set time, and chemical analysis samples are taken by reduction, and the weight ratio of chemical analysis samples to physical and mechanical properties test samples is 1:

2.

3. A sintered ore quality inspection method according to claim 1, characterized in that: Also includes: Manual sampling: When the equipment fails, shuts down or is under maintenance, samples are taken on the stopped belt at every second preset time, and at least six sampling points are determined. The spacing between sampling points is greater than 1m, and the sub-sample size of each sampling point is ≥5kg. The weight ratio of the reduced chemical analysis sample to the physical and mechanical properties test sample is 1:

2.

4. A sintered ore quality inspection method according to claim 1, characterized in that: Also includes: Determine the sample data for which the difference between the weight of the sample entering the drum m0 and the total weight of the sample after the drum rotation (m1+m2+m3) is not greater than 1.0%; Calculate the historical total weight values ​​of the three particle size samples of 40-25mm, 25-16mm, and 16-10mm before entering the drum and the total weight values ​​of the screening after the drum rotation; The difference between the average historical total weight and the average total weight after drum screening is taken as the latest total weight correction value.

5. A sintered ore quality inspection method according to claim 4, characterized in that: Determination of the latest weight correction value includes: According to the screening ratios of the three particle sizes of 40-25mm, 25-16mm and 16-10mm and the latest total weight correction value, the latest weight correction value of each particle size is determined respectively.

6. A sintered ore quality inspection method according to claim 4, characterized in that: The drum index is T=m1 / m0×100%.

7. A sintered ore quality inspection method according to claim 6, characterized in that: The anti-wear index is A = [m0-(m1+m2)] / m0*100%.

8. A sintered ore quality inspection method according to claim 1, characterized in that: Also includes: In the chemical composition inspection process, the mass percentages of TFe, CaO / SiO2, FeO and S are calculated respectively, and the grades of TFe, CaO / SiO2, FeO and S are determined according to the set mass percentages.

9. A sintered ore quality inspection method according to claim 7, characterized in that: Also includes: In the physical and mechanical properties test, the grade is determined based on the drum index, screening index and anti-wear index.

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