CN-122016578-A - Method for evaluating quality of quicklime powder and deducting tonnage according to detection result

CN122016578ACN 122016578 ACN122016578 ACN 122016578ACN-122016578-A

Abstract

The invention discloses a method for evaluating the quality of quicklime powder and deducting tonnage according to a detection result, belonging to the field of metallurgical quicklime powder detection. The method comprises the steps of collecting materials and butting, collecting samples, ensuring that the total quantity is the same as that of a truck and is not lower than a preset standard, performing granularity screening operation, judging whether to execute ton deduction operation based on the ratio of undersize products, performing digestion test, rapidly judging an activity index by monitoring digestion time, performing impurity detection operation, determining impurity content by washing the separated residue proportion, performing heating test, determining an activity index by monitoring time reaching a specified temperature, and performing ton deduction comprehensive calculation according to the ton deduction standard corresponding to each detection result and the multiple determined by the loading net weight of the truck. The quick quality evaluation method realizes quick evaluation of the quality of the quicklime on site, overcomes the defect of lagging assay components, realizes quantitative management of the quality of the quicklime powder through a definite detection means and a ton deduction standard, and is beneficial to guaranteeing the stability of the quality of the sinter.

Inventors

ZHANG WENZHENG
SHEN ZHIQIANG
LI ZHIYONG
Ma Laicun
LIU YANHUI
YANG JINGJING
Bo Rongliang
SHI ZHIWEI

Assignees

天津市新天钢联合特钢有限公司

Dates

Publication Date: 20260512
Application Date: 20251212

Claims (10)

1. A method for evaluating quicklime powder quality and subtracting tonnage from the test result, comprising the steps of: S1, receiving and butting, namely butting the tank truck with an ash spraying pipeline after the qualification is confirmed; s2, sample collection, namely, after the butt joint is completed, operating sampling equipment to collect a representative quicklime powder sample; S3, particle size detection, namely performing particle size screening on the sample, and determining whether impurity ton deduction treatment is performed according to the difference between the screening result and a preset particle size standard; S4, detecting digestion activity, namely performing a digestion test on the sample, determining a digestion activity index of the quicklime powder by monitoring the digestion reaction time, and determining the ton number of the digestion buckles according to the standard of ton number of the digestion activity buckles; s5, detecting impurity content, namely washing and separating a sample after a digestion test, measuring the content of insoluble residues in the sample, and determining impurity button tonnage according to an impurity content button ton standard; s6, detecting heating activity, namely performing a heating test on the sample, determining a water activity index of quicklime powder by monitoring the heating rate of reaction with water or the time of reaching a specified temperature, and determining the heating button tonnage according to the heating activity button ton standard; S7, ton deduction comprehensive calculation: And comprehensively superposing the digestion button tonnage, the impurity button tonnage and the heating button tonnage, and multiplying the button tonnage times to obtain the total tonnage to be deducted.
2. The method according to claim 1, wherein the particle size screening is specifically to take a quantitative sample from the sample, screen the quantitative sample with a round-mesh screen with a specified specification, and execute impurity ton-deducting treatment if the undersize ratio is lower than a preset threshold.
3. The method of claim 1, wherein the digestion test comprises placing a quantitative sample in a container, adding a proper amount of water, monitoring the total time from the start timing of the hydration reaction to the end state of the reaction, and stirring the sample for a specified number of times and duration during the reaction.
4. The method of claim 1, wherein the digestive activity ton criterion is based on a hierarchical comparison of digestive reaction time to a preset time interval, the longer the digestive time, the higher the determined ton of digestive buckling.
5. The method according to claim 1, wherein the step of detecting impurities comprises washing the digested sample with a screen in water, separating out a residue without dripping, weighing, and calculating the mass ratio of the residue to the total amount of the sample.
6. The method of claim 1, wherein the impurity level per ton criteria is based on a hierarchical comparison of the proportion of residue to a predetermined proportion interval, the higher the impurity proportion, the higher the determined impurity per ton.
7. The method of claim 1, wherein the temperature increase test comprises adding a measured amount of sample to a beaker containing a measured amount of warm water and measuring the time required for the sample to reach a specified target temperature after mixing with water.
8. The method of claim 1, wherein the elevated temperature active clamp tonnage is determined to be higher the longer or shorter the target temperature based on a degree of deviation of the time required to reach the specified target temperature from a preset time reference.
9. The method of claim 1, wherein the integrated superposition is performed by simply summing the clamp tonnage, the impurity clamp tonnage, and the heat clamp tonnage to obtain a base clamp tonnage.
10. The method according to claim 1, wherein the particle size detection step specifically includes determining that the particle size of the quicklime powder is not acceptable if the undersize ratio obtained after the particle size screening is lower than a preset threshold, and performing the impurity detection operation in step S5 to determine an impurity button ton according to an impurity content button ton standard.

Description

Method for evaluating quality of quicklime powder and deducting tonnage according to detection result Technical Field The invention belongs to the technical field of metallurgical quicklime powder detection, and particularly relates to a method for evaluating quicklime powder quality and deducting tonnage according to a detection result. Background In the metallurgical industry, quicklime powder is used as an important flux material in the sintering production process, and the quality of the quicklime powder is directly related to the quality stability of the final sintered ore. At present, in industrial production, quicklime powder entering a factory is usually transported by a lime tank truck and is directly injected into a quicklime powder bin through a pipeline for use. This mode of transportation and use, while advantageous in terms of logistical efficiency, presents challenges for quality control and rapid feedback of raw materials in actual production runs. However, the prior art has significant drawbacks, mainly manifested in the insufficient ability to rapidly judge the quality of quicklime powder. In particular, analysis of the assay components of the incoming quicklime powder tends to have hysteresis, which makes it difficult to quickly and accurately determine whether the quality of the quicklime powder meets the process requirements of sintering production before the quicklime powder is put into use. If a quicklime powder with substandard quality is used, a series of serious quality hazards may be caused, including but not limited to the problems of unstable quality of the sinter, reduced alkalinity of the sinter and the like. Therefore, there is an urgent need in the industry for a method for rapidly verifying the quality of quicklime powder on site so that operators can take necessary measures in time, thereby effectively guaranteeing the quality of sintered mineral products. Disclosure of Invention Aiming at the problem that the quality of quicklime powder is difficult to judge whether the quality meets the requirement or not rapidly and accurately due to lag of ingredients in quicklime powder test in the prior art before the quicklime powder is put into use, the invention provides a method for evaluating the quality of quicklime powder and deducting tonnage according to a detection result. The invention is realized by a method for evaluating the quality of quicklime powder and deducting ton according to the detection result, which is characterized by comprising the following steps: S1, receiving and butting, namely butting the tank truck with an ash spraying pipeline after the qualification is confirmed; s2, sample collection, namely, after the butt joint is completed, operating sampling equipment to collect a representative quicklime powder sample; S3, particle size detection, namely performing particle size screening on the sample, and determining whether impurity ton deduction treatment is performed according to the difference between the screening result and a preset particle size standard; S4, detecting digestion activity, namely performing a digestion test on the sample, determining a digestion activity index of the quicklime powder by monitoring the digestion reaction time, and determining the ton number of the digestion buckles according to the standard of ton number of the digestion activity buckles; s5, detecting impurity content, namely washing and separating a sample after a digestion test, measuring the content of insoluble residues in the sample, and determining impurity button tonnage according to an impurity content button ton standard; s6, detecting heating activity, namely performing a heating test on the sample, determining a water activity index of quicklime powder by monitoring the heating rate of reaction with water or the time of reaching a specified temperature, and determining the heating button tonnage according to the heating activity button ton standard; S7, ton deduction comprehensive calculation: And comprehensively superposing the digestion button tonnage, the impurity button tonnage and the heating button tonnage, and multiplying the button tonnage times to obtain the total tonnage to be deducted. In the above technical scheme, preferably, the particle size screening specifically comprises the steps of taking quantitative samples from the samples, screening by using a round-hole screen with specified specification, and executing impurity ton deduction treatment if the undersize ratio is lower than a preset threshold value. In the above technical scheme, preferably, the digestion test comprises the steps of placing a quantitative sample into a container, adding a proper amount of water, monitoring the total time from the initial timing of the hydration reaction to the reaction ending state, and stirring the sample for a designated number of times and duration in the reaction process. In the above technical solution, preferably, the digestive activity ton crite