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Method and plant for drying and comminution of moist, mineral raw materials

A mineral raw material and drying technology, which is applied in clinker production, lighting and heating equipment, furnaces, etc., to achieve excellent combustion characteristics, reduce specific energy consumption, and reduce energy consumption

Active Publication Date: 2014-11-26
F L SMIDTH & CO AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Of course, the disadvantage of this method is the incidental requirement that all raw materials be slurried in a significant amount of water, which must then be removed, for example by filtration or evaporation

Method used

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  • Method and plant for drying and comminution of moist, mineral raw materials

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Embodiment Construction

[0012] The apparatus shown comprises: two homogenization bins 1 and 2 for wet limestone, chalk, marl, clay and similar materials excavated from the quarry, for feeding raw materials from said bins 1 and 2 To the batching plants 3 and 4 of the belt conveyor 5 which conveys the raw material to the drying crusher unit 6 . The device comprises an analyzer 7 for analyzing the composition of the raw material and for calibrating the dosing devices 3 and 4 in order to predetermine the correct chemical composition of the raw material. The shown dry-crusher unit 6 comprises a dry-crusher 8 which receives hot discharge gas from a subsequent kiln system 20 via a pipe 9 and a discharge duct 10 which removes the crushed material in suspended form. From the dry crusher 8 to the separator 11. In the separator 11 the material is separated into a coarse fraction and a fine fraction, the coarse fraction is returned via the duct 12 to the duct 9 and from there to the dry crusher for further Dry...

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Abstract

Provided is a method for drying and comminution of moist, mineral raw materials, including at least one of chalk, marl or clay. The moist, mineral raw material is dried and comminuted in a drier crusher while simultaneously supplying hot gases from a kiln system to form a dried material. The dried material in suspended form is directed to a first separator in which the dried material is separated into a coarse fraction and into a fine fraction. The fine fraction is directed to a separation cyclone and then to the kiln system. The coarse fraction is directed to a dosage means. The dosage means directs a first portion of the coarse material to the drier crusher and a second portion of the coarse material to a separate grinding unit where any hard material components, including at least one of flint, sand or marble, are subjected to grinding to form a ground material. At least a portion of the ground material from the separate grinding unit is supplied to the drier crusher. Also provided is an apparatus for conducting the method.

Description

technical field [0001] The present invention relates to a method of drying and pulverizing moist mineral raw materials such as chalk, marl and clay, by which said raw materials are dried and pulverized in a dry crusher while supplying hot gas, and the material is subsequently removed in suspension from The drier crusher is sent to a separator where the feedstock is separated into a coarse fraction and a fine fraction, the coarse fraction being returned to the drier crusher For further drying and comminution, the fine fraction is sent to the next stage of the process and in the process any hard material components such as flint, sand and marble are ground in a separate grinding unit. The invention also relates to a device for carrying out the method. Background technique [0002] The lack of methods and apparatus of the foregoing type is well known within the cement manufacturing industry. In practice, in the methods used in many cement installations around the world, the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/40
CPCC04B7/40F27B7/2033Y02P40/121
Inventor 索伦·亨德伯尔
Owner F L SMIDTH & CO AS
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