DE572957C - Stick mill for grinding and mixing plastic, pulpy, sticky as well as resinous, oily u. Like. Masses and mixtures - Google Patents

Description

GERMAN EMPIRE

ISSUED ON MARCH 25, 1933

REICH PATENT OFFICE

PATENT LETTERING

JVi 572957 CLASS 80 a GROUP 2os

Elsbeth Zarniko née Witting in Hildesheim

Patented in the German Empire on January 5, 1927

The grinding and mixing of dry or moist substances with so much liquid added that a flowing mixture is created, such as. B. thin sludge in the wet processing of cement raw material is known and z. B. carried out in tube or drum ^{mills with grinding balls or 1} rod filling. Drum mills for performing the above work are also known, in which one or more rollers are arranged in a drum, which, however, are inevitably mounted in scenes or cages and set in rotation.

The invention aims to process masses with very special properties, namely those with particularly high cement strength and sinterability with perfect of uniform composition and with any moisture content. The product obtained according to the invention consists of highly refined clay, kaolin, silica or a sticky plastic one Pressing, ramming or molding compound. This goal is achieved by doing the if necessary pre-shredded raw material in tube or drum mills equipped with rods as grinding media is ground, the outlet openings on their circumference. or have slots through which the goods are ready for use knocked out or pushed out. It is known per se, also for processing plastic or viscous mass rod mills. However, this is not the case when using the usual rod mills possible to obtain perfectly uniform masses with the above properties received, but only if for a pressing of the goods through in the drum shell attached slots or openings is taken care of.

The rod mills designed in this way deliver something that goes beyond the previous one Fineness of the masses given, which gives them a much higher putty strength and Achieve sinterability. For example, subtleties below the 10,000-mesh sieve reached.

The grinding rods lying casually in the drum guide as they fall multiple effects by using one and the same grinding rods over the full length of the drum grind and mix the product and at the same time knock or roll the finished product out of openings in the drum shell. Such standards in z. B. several meters in length have a much greater energy and compared to other grinding media these can all alone be the case with the increase in the fineness of the grinding in plastic masses Overcome variable grinding properties. Because z. B. balls wrap themselves in the grist and lose their grinding effect, so that their grinding energy is too small to remove the plastic material from the circumferential slots of the drum knock out. If the exit slits are too large, because the balls fall out of the mill with the grist.

The grinding effect of the rods can be increased by suitable shaping the armor plates, over the openings of which the grinding rods roll across when they are smooth are, or those who, with their wave crests, lift the bars higher to put them into the Wave troughs roll or drop, in which the outlet slits for example are located. This grinding rod effect has also ■ ο proven itself in practical operation.

Depending on the grinding material to be reprocessed, it may be useful to use Support of the grinding vein mixing process the grist under pressure, e.g. B. by a screw press or a plunger and the like to feed the mill.

If you want to mix the grist in the mill with a liquid or dry it add liquid to the Verao grind abandoned grist, so it can be expedient be to give up the liquid with the raw material of the mill or this shortly before the Entering the drum feed.

The size and number of outlet openings or slots through which the finished product is rolled out of the grinding rods or is pressed out depends on the grist to be processed. By attachment the same can be regulated by slides on the outlet slots, see above that the discharge quantity as well as the grinding pressure are adjustable. By arranging scrapers outside the drum shell can the pushed out plastic material from the outer periphery of the drum dumbbell be stripped from which it is fed to further processing.

The outlet slots themselves can drum anywhere in the scope of the grinding . be arranged, but it is appropriate to the opposite of the inlet to the To be placed at the end of the drum or grinding chamber, as the material to be ground has to travel through the entire length of the drum before it comes out of the mill. .

In Figs. 1 to 3, for example, some schematic representations of the described Drawn drum mill.

Fig. Ι shows a longitudinal section through a Drum mill, with the inlet at one end of the drum and in the drum shell the, exit slots or openings. angeoridnötisimd.

Fig. 2 shows a cross section of the drum mill through the outlet slots, and

Fig. 3 shows a single-chamber drum mill in longitudinal section, in which at one end of the drum the material is abandoned and exits through slots at the other end of the drum.

The material to be processed is fed to the grinding drum α through the inlet spigot e. The drum itself is closed off by the two end walls b and c , the end wall b being provided with an inlet opening and the end plate c being designed as a base plate for the grinding rods.

The grinding rods d, lying freely in the drum, perform the grinding and mixing work over the full length of the drum, while they knock the finished product out of slots or openings f in the drum shell.

Claims (1)

Claim: Rod mill for grinding and mixing plastic, pulpy, sticky as well as resinous, oily and similar masses and mixtures, characterized in that outlet openings on the drum circumference of the rod mill or slots are provided through which the ready-to-use material is knocked out by the grinding rods or is pushed out. 1 sheet of drawings