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Применение радиолокационных систем измерения поверхности засыпи шихты для контроля и управления доменной плавкой

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В книге представлены результаты впервые выполненных исследований по освоению первой отечественной радиолокационной стационарной системы измерения профиля поверхности засыпи шихты на колошнике, установленной на доменной печи №9 «Криворожстали». Разработаны технологические требования к установке систем измерения профиля поверхности засыпи для доменных печей средних и больших объемов, оборудованных конусными и бесконусными загрузочными устройствами, а также методы расчета параметров поверхности засыпи шихты. Представлены разработанные в Институте черной металлургии им. З.И. Некрасова НАН Украины с использованием информации радиолокационной системы способы контроля, прогноза и управления доменной плавкой, реализованные на крупнейшей в Украине доменной печи. Результаты исследований, выполненных сотрудниками ИЧМ за последние десять лет, являются базой для дальнейшей разработки новых технологических способов управления доменной плавкой на основе информации, получаемой радиолокационной системой. Для ученых-металлургов и широкого круга инженерно-технических работников металлургической промышленности, аспирантов, докторантов, а также преподавателей и студентов металлургических ВУЗов.
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Article
The influence of ore/coke distribution on the descending and melting behaviors of burden was analyzed by using a three-dimensional semicircular warm model of the blast furnace under conditions set as similar as possible to the physical phenomena in the furnace. If the ore/coke in wall region is locally increased, the descending velocity increases and the gas flow velocity decreases in that region. An increase of +0.1 in the heat-flow ratio in the wall region of bosh results in a decrease of about 5°C (80°C in the value converted into that of the actual blast furnace based on the Stanton number) in the wall temperature of bosh. At the all coke operation, as the wall temperature in the lower part of the furnace tends to decrease, the ore/coke near the wall should be preferably decreased by the charging of ore closer to the furnace center. At the high-rate coal injection operation, as the melting capacity near the wall is large, the ore/coke in the wall region should be preferably increased and the ore/coke in the center region should be preferably decreased by the charging of ore farther from the furnace center.
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Article
A simulation model for the burden distribution at a blast furnace top was developed. In addition to the static deposit angle, the following factors which have strong effect on the burden distribution were considered in the model.1) Mixed layer formation in the furnace center during ore dumping2) Decrease of burden deposit angle by gas flow3) Change of burden deposit angle by the velocity distribution of burden descent in the radial directionFor the quantitative evaluation of these effects the mixed layer measurement by the use of a magnetometer during furnace fillings and the measurement of the change in deposit angle with gas flow by the use of a 1/2 scale cold model were performed. As a result, the increase in coke layer thickness in the furnace center (ΔLc) is expressed by the following experimental equation through the use of “formation energy of mixed layer” (EM). ΔLc=3.49×10-4×EM-136Among factors mentioned above, the mixed layer formation was confirmed by the model to have the most significant effect on the burden distribution.
Технология высокоэффективной энергосберегающей доменной плавки / Большаков В. И. -К.: Наук.думка
  • В И Большаков
Большаков В.И. Технология высокоэффективной энергосберегающей доменной плавки / Большаков В. И. -К.: Наук.думка, 2007. -412 с.
Средства контроля профиля поверхности засыпи шихты в доменной печи / В. И. Большаков, И. Г. Муравьева. -Металлургическая и горнорудная промышленность
  • В И Большаков
Большаков В.И. Средства контроля профиля поверхности засыпи шихты в доменной печи / В. И. Большаков, И. Г. Муравьева. -Металлургическая и горнорудная промышленность, 2002. -№ 2. -С. 91-94.
Эффективность использования радиолокационных устройств для контроля уровня и профиля засыпи в доменных печах / Большаков В. И. -Металлургическая и горнорудная промышленность
  • В И Большаков
Большаков В.И. Эффективность использования радиолокационных устройств для контроля уровня и профиля засыпи в доменных печах / Большаков В. И. -Металлургическая и горнорудная промышленность, 2012. -№ 5. -С. 9-10.