SU579014A1

SU579014A1 - Method of controlling a process of double-stage crushing in a mill

Info

Publication number: SU579014A1
Application number: SU7502144152A
Authority: SU
Inventors: Юрий Сергеевич Малинин; Владимир Зельманович Пироцкий; Александр Борисович Бреслер; Юрий Владимирович Уманский; Яков Евсеевич Гельфанд; Эсфирь Яковлевна Гутерман
Original assignee: Государственный Всесоюзный Научно-Исследовательский Институт Цементной Промышленности
Priority date: 1975-06-13
Filing date: 1975-06-13
Publication date: 1977-11-05

Description

Изобретение относитс к промышленности строительных материалов и может быть использовано в горнообогатительной, энергетической, химической отрасл х народного хоз йства, а также в цветной i: черной металлургии.The invention relates to the building materials industry and can be used in the ore-dressing, energy, chemical industries of the national economy, as well as in the nonferrous i: ferrous metallurgy.

Известен способ управлени процессом двухступенчатого мельничного помола 1.A known method for controlling the process of a two-stage mill grinding 1.

Этот способ предусматривает взаимосв занное управление мельницами грубого и тонкого помола.This method provides for the interconnected control of coarse and fine grinding mills.

Недостаток известного способа состоит в низкой эффективности управлени , обусловленной существенным запаздыванием управл ющего воздействи .The disadvantage of this method is low control efficiency, due to the significant delay of the control action.

Известен также другой способ управлени процессом двухступенчатого мельничного помпла 2.There is also another way to control the process of a two-stage mill pump 2.

Этот способ заключаетс в регулироваьгии и координации, измельчени материала в N-re bHHце грубого помола, сепарации готового продукта и донзУ1ельчени { крупки в мельнице тонкого помола, причем расход материала в мельницу грубого помола регулируют по расходу крупки в обратно пропорциональной зависимоспи.This method consists in regulating and coordinating, grinding the material in coarse grinding N-re, separating the finished product and crushing in the fine grinding mill, and the consumption of material in the coarse grinding mill is controlled by the consumption of grain in inversely proportional dependence.

Последний из указанных выше способов вл етс н.аиболее близким к изобретению.The last of the above methods is the one closest to the invention.

Недостаток известного способа св зан с невозможностью обеспечени оптимальной загрузки мельничных агрегатов, особенно мельницы тонкого помола.A disadvantage of the known method is associated with the impossibility of ensuring optimal loading of the mill aggregates, especially fine grinding mills.

Целью изобретени вл етс обеспечение повышенной производительности мельниц.The aim of the invention is to provide improved performance of the mills.

Поставленна цель достигаетс тем, что осуществл ют дополнительную подачу нензмельченного материала в мельницу тонкого помола , причем расход неизмельченного материала в мельницу грубого помола регулируют по скорости изменени расхода отсепариров,знного готового продукта до достижени ее нулевого значени , а расход неизмельченного материала в мельницу тонкого помола регулируют по расходу крупки в обраТЮ пропорциональной зависимости и корректируют по дисперсности круп ки в пр мо пропорционально. зависимости.The goal is achieved by providing additional feed of non-ground material to the fine grinding mill, and the flow of unmilled material into the coarse grinding mill is controlled by the rate of change of the separator consumption, the known finished product, to achieve its zero value, and the flow of the unground material into the fine grinding mill is adjusted according to the consumption of grains in the treatment of proportional dependence and corrected by the dispersity of the grains in direct proportion. dependencies.

При помоле цег-лента в двух однотипных трубных шаровых мельницах предложенный способ управлени осуществл етс cлeдyющи образом.When grinding ceg-tape in two of the same type of tube ball mills, the proposed control method is carried out as follows.

Claims

In the coarse-grinding mill, the main stream (bo, first quantity) of unshallowed clinker material with additives is supplied. The crushed product is separated in a centrifugal separator, and the separated grit is sent to an E fine grinding mill, to which additional feed is also supplied to the unground material ;; a. The finished product recovered in the separator, as well as crushed in a fine grinding mill, is discharged into collections of the finished product. Further process control is performed in the following sequence. The flow rate of the unmilled material main stream is changed into the coarse grinding mill and the average consumption of the finished separated product is compared for a certain period of time after the change with the average consumption of the separated product during the same period of time before the specified change of unground material consumption into the coarse grinding mill. If the consumption of the separable finished product has increased, i.e. the rate of its change is positive, then a variable consumption of the non-crushed material is again produced in the coarse grinding mill in the same direction. If the consumption of the separated finished product is reduced, i.e. the rate of its change is negative, then the consumption of unground material in the coarse grinding in the opposite direction is changed. If the average consumption of the separated finished product is not isolated, i.e. the change in the velocity is different to zero, and the change in the flow rate of the unground material into the mill does not produce coarse gumola. Then, the flow of semolina separated in the separator is measured by any known method. The flow rate of the additional flow of unground material f to a fine grinding mill is varied inversely proportional to the consumption of grain. In order to improve the performance of the fine grinding mill, the flow is additionally corrected in addition to the flow of the crushed material according to the dispersity of the grains, which can be determined, for example, indirectly by the / puma characteristics of the mill. In practical use of the proposed control method, the productivity of grinding mills in the case of grinding, for example, cement, is increased by 25-ZO Wo. Claims The method of controlling a two-stage mill grinding process consists in controlling and coordinating the grinding of a material in a coarse grinding mill, separating the finished product and grinding the grains in a fine grinding mill, characterized in that in order to provide an increased mill productivity, an unground grinding material is added. fine grinding in the mill, and the consumption of unground material in the mill coarse grinding regulate the rate of change and the separated finished product until it reaches zero, and the flow of unground material into the fine grinding mill is controlled by the consumption of grit in inverse proportion and adjusted by the dispersion of grit in directly proportional ratio. Sources of information taken into account in the examination:. Copyright certificate JV9 175379, class, B 02 from 25/00, 1963.

2. Patent of Germany No. 1168221, class, 50 from 19/30, 1960,