SU1486179A1 - Tubular machine - Google Patents

Description

The invention relates to the technology of grinding and can be used2

but in cement, mining and other industries.

The purpose of the invention - reduction of energy and material costs by optimizing the grinding obe ¹ mov chambers coarse and fine grinding performance.

Pipe mill, contains a coarse grinding chamber with core loading, made in the form of a cylindrical shell 4, concentrically located in the fine grinding chamber on the loading side and having a diameter equal to (0.7-0.9) of the diameter of the drum 1, and a length of 1, 3 1.35 times its diameter. 1 hp and f-ly, 1 ill. ®

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The invention relates to the technology of grinding and can be used in cement, ore dressing and other industries.

The aim of the invention is to reduce the energy and material costs of grinding by optimizing the volume of coarse and fine grinding chambers in terms of productivity.

The drawing shows schematically a pipe mill, a general view; The mill contains a cylindrical drum 1 with lining 2, supporting trunnions 3 with face bottoms, a coarse grinding chamber in the form of a cylindrical lined shell 4 with slits 5 and rod loading 6, fine grinding chamber 7-9, intercamera partitions 10 and 11 and discharge grid 12.

The optimal diameter value of <1 rod chamber with the accepted 1 / D =

= 1.3 - 1.35 are found from the required grinding conditions in the mill as a single unit, equating the performance of the rod and globule-chambers chambers. To do this, pre-determine the power consumption of N chambers with rod and ball-cylinder loads and the specific consumption for grinding (i.e. the grindability of the material) during rod and ball grinding.

Depending on the material properties, i.e. grindability, and length 1 and diameter <3. drum mill optimal value of D is in the range of 0.7-0.9 of the diameter of the drum, respectively, for soft and hard material.

To reduce the diameter of the core chamber, the proposed mill is equipped with a lined cylindrical shell of 0.7-0.9 in diameter from the diameter of the drum of the mill, and the length of this shell is 1.3-1.35 ravus larger than its diameter.

Reducing the diameter of the core chamber allows you to reduce the mass of the core load by 35-36 I, to bring the center of gravity of the load closer to the axis of the mill, which provides a significant reduction in energy costs for grinding coarse grinding in the chamber ”

The mill works as follows.

The source material with a grain size of up to 30 mm enters through the loading trunnion 3 into the mill and, as it progresses, is crushed in the rod chamber 6 and chambers 7 and

8 fine grinding. After reaching the specified fineness of grinding material is removed from the mill through the discharge pin.

Part of the material in the core chamber 6, which has reached a size smaller than the size of the slits 5 of the lined shell 4, enters the cavity

9 with grinding bodies and is additionally crushed. ”Then this material passes through the slits of the partition 10, mixes with the main flow and is crushed with it to a predetermined fineness.

The invention will allow for 30-40Ζ to increase the productivity of the mill and reduce the specific energy consumption.

Claims (2)

Claim 1. A tube mill containing a cylindrical lined drum divided by inter-chamber partitions into a coarse chamber with core loading and fine grinding chambers, supporting trunnions and actuators, which, in order to reduce the energy and material costs of grinding by optimizing the volume of chambers coarse and fine grinding in performance, coarse grinding chamber is made in the form of lined cylindrical shell, the diameter of which is 0.7 0.9 drum diameter, and the length of the shell 1.3 - 1.35 times olshe its diameter, and the shell is concentrically located in the chamber of fine grinding on the loading side. 2. Mill according to claim 1, about t l and the condition that the cylindrical shell is made perforated.