ES1063091U - Mill for the grinding of minerals - Google Patents

Abstract

Mill for the crushing of minerals of the type consisting of a crushing chamber equipped with an inlet opening for minerals and an outlet opening, the interior walls of which are lined with a plurality of robust teeth against which the minerals to be crushed are projected by means of a rotor that rotates inside, characterized in that it has an adjustable screen integrated in the outlet opening of the crushing chamber to select the granulometry of the crushed fragments. (Machine-translation by Google Translate, not legally binding)

Description

Mill for crushing minerals.

Object of the invention

The present invention relates to a mill for the crushing of minerals, such as stones and aggregates in general, in order to reduce them to a size suitable for use as building material, such as gravel, gravel or for the obtaining cement, concrete and the like.

The object of the invention focuses on the provision of a means to select granulometry, is that is, the grain size of the crushed final product.

Background of the invention

The existence of mills for crushing minerals, basically intended for construction sector, composed of a chamber whose walls Interiors are lined with a plurality of sturdy teeth against which the minerals to be crushed are projected through a rotor that rotates inside. Said crushing chamber has from an inlet opening, usually at the top, to through which minerals are introduced for crushing and crushing by projection against interior walls, and by the rotation of the rotor bars that imprisons them against of the teeth of the walls.

These mills have an opening of outlet, located at the bottom of the crushing chamber, where crushed minerals fall.

Since the output of crushed minerals is performed freely by the effect of gravity through the lower opening, the particle size of the final product is very diverse, forcing a subsequent process of classification, to crush again those fragments of size excessive and not suitable for the desired application.

Another drawback of this type of mill is that do not allow crushing small mineral fragments, below of a given granulometry, since they are issued by the chamber exit opening without being crushed, due precisely to its small size. This results in quantities residuals of crushed material of excessive granulometry, not suitable for application in the construction sector.

Description of the invention

The mill for crushing minerals that the The proposed invention solves the problem described above, by having some means to select granulometry, it is that is, the grain size of the crushed final product.

To do this, and more specifically, the mill for the crushing of minerals it is of the type composed of a crushing chamber equipped with an inlet opening of the minerals and other outlet, whose interior walls are coated with a plurality of sturdy teeth against which the minerals to be crushed are projected using a rotor that rotates in inside, and has an adjustable screen integrated into the output opening of the crushing chamber to select the granulometry of the crushed fragments.

Said sieve is composed of a plurality of parallel metal bars arranged on a set of guides equipped with two grooves in which the bars are fixed.

Another possibility is that the screen is composed by a metal sheet provided with a plurality of holes of the same diameter, arranged on a fixing guide practicable.

In both cases, the guide of fixation adopts a curvilinear configuration continued with the shell of the crushing chamber liner.

In the case of using metal bars, you are they will be of truncated cone section so that the exit step between Bars are approximately parallel.

To select product granulometry final, we just have to replace the metal bars that they constitute the sieve, for others of different width, to increase or decrease the exit light of the screen. In the case of using a perforated sheet metal, we will replace it with another one provided with holes with another diameter.

Description of the drawings

To complete the description that is being performing and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization of it, is accompanied as part member of that description, a set of drawings in which with illustrative and non-limiting nature, what has been represented next:

Figure 1 shows an elevation of the object mill of the invention duly sectioned, in which the Inner crushing chamber, rotor and arrangement of the screen integrated in the exit opening.

Figure 2 shows a detail view in sieve plant composed of metal bars fixed on the guides

Figure 3 shows an elevation view of the sieve represented in the previous figure.

Figure 4 shows an elevation view of the metal bars that make up the screen.

Preferred Embodiment of the Invention

In view of the figures outlined you can observe how the mill for crushing minerals is of the type consisting of a crushing chamber 1, provided with a opening 2 for the entry of the minerals to be crushed and a exit opening 3 for their expulsion once crushed. The inside of the crushing chamber 1 is coated with a plurality of sturdy teeth 4, known as "palate" against which minerals are projected to crush using a rotor 5 that rotates inside the camera.

To select mineral granulometry crushed if you have a sieve 6 in the outlet opening 3 composed of a plurality of parallel metal bars 7.

The fixing of said metal bars 7 is performs on a set of guides 8 which adopt a curvilinear configuration continued with the envelope of the crushing chamber lining. Said guide 8 is equipped of a plurality of slots 9 in which the bars fit together metallic 7 through some lace 10 practiced in their extremes So that the defined step between the metal bars 7 consecutive be approximately parallel, it is expected that these are of conical section.

Thanks to the layout of the guides 8 we can replace the metal bars 7 with others of different widths to increase and decrease the exit light of the sieve.

Another embodiment of screen 6 consists of arrangement of a perforated sheet metal, not represented in the drawings, in the outlet opening 3, which adopts the same curvilinear configuration on guides 8. In this case, for select the granulometry of the crushed ore, we will replace the sheet perforated by another one provided with holes with another diameter.

Thus, thanks to the provision of the screen 6 in the outlet opening 3, the mill will issue the crushed minerals whose size is smaller than the light of the screen. The rest of fragments of greater size, will continue their circular path inside the crushing chamber 1 driven by the bars 11 of the rotor 5, to be again crushed in the following turns until its size is lower than the screen light 6, at which time they will leave the crushing chamber.

Screen 6 is expected to be integrated into the outlet opening 3 adopting a curvilinear configuration continued with the envelope of the chamber lining of crushing, so that fragments larger than the size of the sieve light, continue your circular path inside the crushing chamber 1, without producing retentions or accumulations unwished.

Claims (5)

1. Mill for the crushing of minerals of the type consisting of a crushing chamber equipped with an inlet opening of the minerals and an outlet, whose interior walls are covered with a plurality of sturdy teeth against which the minerals to be crushed are projected by means of a rotor that rotates in its interior, characterized in that it has an adjustable screen integrated in the outlet opening of the crushing chamber to select the granulometry of the crushed fragments. 2. Mill for the crushing of minerals, according to claim 1, characterized in that the sieve is composed of a plurality of parallel metal bars arranged on a set of guides provided with two grooves in which the bars are fixed. 3. Mill for crushing minerals, according to claim 1, characterized in that the sieve is composed of a metal sheet provided with a plurality of holes of the same diameter arranged on a practicable fixing guide. 4. Mill for crushing minerals, according to claim 2, characterized in that the metal bars are of truncated cone section. 5. Mineral crushing mill, according to claims 2 and 3, characterized in that the fixing guides have a continuous curvilinear configuration with the shell of the crushing chamber liner.