SU652967A1

SU652967A1 - Method of controlling the feed rate of charge into mill

Info

Publication number: SU652967A1
Application number: SU772468499A
Authority: SU
Inventors: Яков Евсеевич Гельфанд; Исидор Евгеньевич Шейнин; Василий Васильевич Шутов; Эсфирь Яковлевна Гутерман
Priority date: 1977-03-29
Filing date: 1977-03-29
Publication date: 1979-03-25

Description

Изобретение относитс к способам управлени npoueccOiM измельчени материалов в трубных и барабанных мельницах и может быть использовано в цементной, горнообогатительной , химической и других отрасл х промышленности, св занных с измельчением многокомпонентной шихты.The invention relates to methods for controlling npoueccOiM grinding materials in pipe and drum mills and can be used in cement, ore dressing, chemical, and other industries associated with grinding a multicomponent mixture.

Известен способ управлени расходом компонентов шихты, подаваемых в мельницу в функции весового расхода одного из компонентов с коррекцией по гранулометрическому составу исходных компонентов или готового продукта на выходе мельницы 1.There is a known method for controlling the flow rate of charge components supplied to the mill as a function of the weight flow of one of the components, with correction for the particle size distribution of the starting components or the finished product at the output of the mill 1.

Однако этот способ не обеспечивает полную точ}1ость управлени .However, this method does not provide a full point of control.

Известен другой способ управлени расходов компонентов шихты в мельницу, включаюш .ий изменение подачи в мельницу компонентов 2. Этот способ ближе к изобретению , однако он также не обеспечивает высокую точность управлени дозировкой компонентов, что приводит к колебани м состава готового продукта из.мельчени на выходе из мельницы. Это св зано с тем, что в известном способе не учитываютс различи во времени прохождени каждого из компонентов измельчаемой шихты черезThere is another way to control the costs of the charge components in the mill, including the change in the feed to the mill of components 2. This method is closer to the invention, but it also does not provide high accuracy in controlling the dosage of the components, which leads to variations in the composition of the finished grinding product from the mill. This is due to the fact that in the known method the differences in the transit time of each of the components of the comminuted charge are not taken into account.

мельницу, вызванное механическими свойствами компонентов и гидродинамическим (аэродинамическим) режимо.м их движени вдоль мельницы.the mill caused by the mechanical properties of the components and the hydrodynamic (aerodynamic) regime of their movement along the mill.

Цель изобретени - повышение точности поддержани заданного качества готового продукта на выходе мельницы.The purpose of the invention is to improve the accuracy of maintaining the desired quality of the finished product at the mill outlet.

Это достигаетс тем, что в способе управлени расходом компонентов шихты в мельницу , включаюпдем изменение подачи в мельницу компонентов, дополнительно измер ют врем пребывани компонентов в мельнице и определ ют компонент с максимальным временем пребывани , причем изменение подачи в мельницу начинают с компонента с максимальным временем пребывани , а изменение иодачи каждого последующего. компонента осуш,ествл ют через интервал времени, равный разности времени пребыванн первого и данного компонента шихты.This is achieved by the method of controlling the flow rate of the components of the charge to the mill, including changing the feed to the mill components, additionally measuring the residence time of the components in the mill and determining the component with the maximum residence time, and changing the feed to the mill , and the change in the value of each subsequent. the dry component is measured at a time interval equal to the time difference between the first and the given charge component.

Сушность способа заключаетс в следующем .The dryness of the method is as follows.

Claims

With a simultaneous change in the flow rate of all components at the entrance to the mill, the differences in the transit time of each component of the milled charge through the mill result in fluctuations in the content of individual components and the quality of the finished product at the exit of the mill relative to the task. Thus, the residence time of various components of the mixture in a wet autogenous grinding mill was about 4 minutes for chalk, about 2 minutes for clay, and about 1.5 minutes for water, which, while simultaneously changing the costs of components, resulted in significant deviations from the specified composition of the finished product. at the exit of the mill during the transition process. A change in the total charge consumption at which the flow rate of each component fed to the mill changes with a time shift depending on the time from components in the mill increases the accuracy of maintaining the desired quality of the finished product at the mill output. For example, in the case of wet grinding of cement raw materials when changing the flow rate of solid components (lime, marl) to stabilize the viscosity of the slurry, the flow rate of the liquid components is changed over a time interval equal to the difference in residence time of the solid and liquid components in the mill. Claims The method of controlling the consumption of charge components in a mill, including changing the feed to the mill components, characterized in that, in order to improve the accuracy of maintaining the desired quality of the finished product at the mill output, the residence time of the components in the mill is determined and the component c is determined. maximum residence time, and the change in the feed to the mill begins with the component with the maximum. the residence time, and the change in the supply of each successive component is carried out at an interval of time equal to the difference in residence time of the first and this component of the charge. Sources of information taken into account in the examination 1.G.Matveev and others. Automatic control of water supply to a ball mill. Mining Journal, 1968, No. 12.

2. The copyright certificate of JMb 400362, cl. B 02 C 25/00, 1973.