Apparatus for the comminution and grinding of brittle grinding stock, particularly of damp initial material
AssigneeKlockner-Humboldt-Deutz Aktiengesellschaft
InventorsHelmut Duill, Josef W. Brummer
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Abstract
For reducing the specific energy outlay in the grinding-drying of damp initial material, a circulating grinding system including a comminution machine, particularly an impact hammer, which is followed, via a sifter, by a high-pressure roll press operated in accord with the principle of product bed comminution, whereby the product admission of an impact hammer mill is connected to the feed for fresh initial material and the product discharge of a roll press is in communication with a product admission and/or with a product discharge of an impact hammer mill.
Claims17
A grinding system for the comminution and grinding of brittle grinding stock selected from the group consisting of initial material for raw cement meal, cement clinker and coal including damp initial materials comprising in combination:
- a comminution mechanism;
- supply means for supplying an initial grinding stock to said comminution mechanism;
- a comminution product discharge conduit connected to said comminution mechanism;
- a classifier connected to receive the output from said comminution discharge conduit and having a coarse material output and a fine material output;
- a high pressure roll press connected to receive output of coarse material from said classifier;
- and a crushed product discharge leading from said roll press and connected to deliver respective portions of said crushed product to said supply means and to said comminution product discharge conduit so that one portion of said crushed product from said roll press is delivered back to said classifier and a remaining portion is delivered to said comminution mechanism.
A method of comminution and grinding a brittle grinding stock selected from the group consisting of initial material for raw cement meal, cement clinker and coal including damp initial materials, comprising the steps of:
- comminuting an initial grinding stock;
- delivering the comminuted material to a classifier and receiving a coarse material output and a fine material output;
- delivering said coarse material from said classifier to a high pressure roll press;
- delivering a portion of the output of said roll press to be comminuted and the remaining portion to be classified;
- and
- delivering heated gases to the at least initial grinding stock to remove the moisture therefrom.
An apparatus for comminuting, grinding and drying damp, brittle grinding stock selected from the group consisting of initial material for raw cement meal, ore and coal comprising:
- an impact hammer mill having a closed floor, a product admission inlet and a product discharge outlet, said product admission inlet being supplied by product feed means and having hot gas injected therein, said product discharge outlet having a riser connected thereto in the form of a flow drier having a tube worm sluice, said riser leading to and being in connection with a sifter, said sifter having a discharge outlet for coarse product which is in communication with a delivery shaft of a high pressure roller press, said roller press having a discharge which leads directly to said riser.
Dependencies are inferred from the claim text.