On-line intelligent detection device and method for particle size of sintering fuel

Abstract

The invention discloses an on-line intelligent detection device for the particle size of sintering fuel. The on-line intelligent detection device comprises three sequentially-communicating sliding ways, a powerful vibrating screen, a first weighing device and a discharging bin, an intelligent robot and a feeding station, wherein the powerful vibrating screen, the first weighing device and the discharging bin are arranged at the side parts of the sliding ways; one end of the second sliding way of the three sliding ways communicates with the first sliding way, and the other end of the second sliding way communicates with the third sliding way; a plurality of loading containers are placed on the three sliding ways, the first sliding way is divided into a first area and a second area serving as a first microwave suppression station, and the second area communicates with the second sliding way; and the second sliding way serves as a microwave drying area, a plurality of first microwave sources are arranged at the top of the second sliding way, and the third sliding way is divided into a third area serving as a microwave drying judging station, a fourth area serving as a second microwavesuppression station and a fifth area. According to the on-line intelligent detection device, the moisture content and the particle size composition of the sintering fuel can be detected in real time,quick, on line and precisely, and field sintering production is guided in real time.

Description

technical field [0001] The invention relates to a fuel particle size detection device, in particular to an on-line intelligent detection device for sintered fuel particle size and a detection method thereof, belonging to the field of solid fuel particle size detection. Background technique [0002] In the sintering production process, 80% of the heat energy consumed per ton of sinter comes from the solid fuel in the mixture, which saves energy consumption and is bound to improve the utilization rate of solid fuel. The fuel dosage, particle size composition and combustion properties directly affect the temperature and heat distribution of the sintered material layer, the thickness of the combustion zone, the gas permeability of the material layer, and the sintering atmosphere. When the type and dosage of fuel are fixed, The particle size of fuel becomes the most important factor affecting fuel combustion and heat transfer in the sintering process. [0003] Commonly used sint...

AI Technical Summary

Problems solved by technology

[0004] (1) The combustion zone becomes wider, which makes the gas permeability of the sintered material layer worse;

[0005] (2) The fuel is unevenly distributed in the material layer: near the large particle fuel, the amount of ore melting is large and rapid, while the material farther away from the fuel cannot be sintered well;

[0006] (3) In the place where there is no fuel, the air cannot be used, which reduces the sintering speed;

[0007] (4) Fuel segregation is prone to occur when distributing materials to the sintering machine trolley: large particle fuel is concentrated in the lower part of the material layer, but the lower part usually requires less fuel than the upper part, which makes the temperature difference of the sintered material layer larger, making The quality of the upper and lower parts of the sinter is different, that is, the strength of the upper sinter is poor, and the lower part of the sinter is over-melted and the FeO content is high

[0009] (1) The particle size of the fuel is too small and the combustion speed is fast. When the heat transfer performance of the sintered material is not good, the heat generated by the fuel is difficult to make the sintered material reach the melting temperature, and the sintered material is not well bonded, thereby reducing the strength of the sintered ore;

[0010] (2) The small particle size fuel hinders the airflow movement in the material layer, reduces the gas permeability of the sintered material layer, and may be taken away by the airflow

Although it can reflect the particle size composition of the fuel to a certain extent, even assuming that the particle size detection accuracy is very high, it is difficult to avoid the situation that the detection results are inconsistent with the actual results

Because first of all, this method needs to compact and flatten the fuel on a plane. Since the fuel is generally coke powder or coal powder, which is brittle, large particles are easily crushed and broken during the compaction process; secondly, Particles <3mm or even <1mm are easier to hide in the lower part of the large particles, so that the small particles in this part cannot be measured; again, after the solid fuel is compacted, the particles <1mm are closely connected to each other, which is impossible when using a computer for particle size processing. At the same time, when the porosity of the fuel used is high, the computer particle size processing will process the large particles into many small particles, so that the particle size distribution results are seriously inconsistent with the actual situation

[0013] In addition, the current method used to detect the particle size composition of fuel on site is mainly manual sampling, which is sent to the laboratory for detection and analysis, and the sieving method is used for grading. After the sieving is completed, the materials of each sieve are weighed separately. Calculate its particle size composition, wet material sieving takes a long time, and it is easy to block the screen, and the moisture distribution also has a certain impact on quality inspection

The cycle of manual sampling detection and analysis is long, the labor cost is high, and the representativeness of the samples taken instantaneously is not strong, so the detection results cannot truly reflect the particle size distribution of the fuel in the production process

With the increasing requirements of the metallurgical industry for the level of production automation and the further strengthening of the concept of intelligent manufacturing, manual sampling to detect the particle size composition of fuel can no longer meet the needs of high-yield, high-efficiency and high-automation production

Images