SU814459A1

SU814459A1 - Apparatus for abrading samples

Info

Publication number: SU814459A1
Application number: SU792778541A
Authority: SU
Inventors: Ор Викторович Щербак; Виктор Трофимович Ефремов; Леонид Николаевич Якушин; Борис Яковлевич Корешков
Original assignee: Всесоюзный Научно-Исследовательскийинститут Минерального Сырья
Priority date: 1979-06-12
Filing date: 1979-06-12
Publication date: 1981-03-23

Description

1one

Изобретение относитс к дроблению или измельчению различных материалов и может быть использовано в геологии, медицине, пищевой, химической и других отрасл х промышленности при подготовке препаратов дл спектрального , рентгеновского, химического и других видов анализа различных материалов. The invention relates to the crushing or grinding of various materials and can be used in the geology, medicine, food, chemical and other industries in the preparation of preparations for spectral, x-ray, chemical and other types of analysis of various materials.

Известны устройства дл механического истирани проб минералов, руд и горных пород, истирающие элементы которых содержат ступку и пестик, приводимые во вз-аимодействие посред ством различных приводов fl .Devices are known for mechanical abrasion of samples of minerals, ores and rocks, the abrasive elements of which contain a mortar and pestle, which are brought into action by means of various fl actuators.

Недостатком этих устройств вл етс неэффективна кинематическа схема и, следовательно, относительно низка производительность мельницы.The disadvantage of these devices is the inefficient kinematic scheme and, consequently, the relatively low productivity of the mill.

Кроме того, происходит налипание истираемого материала на рабочие поверхности (дл чего предусмотрены скребки), а также заражение проб материалом ступки -и песта.In addition, the abradable material sticks to the working surfaces (for which scrapers are provided), and the sample is contaminated with mortar and pestle material.

Известно также, устройство дл механического истирани проб, снабженное электромагнитным приводом, содержащее размольную ступку, и шар, частота колебаний которого в ступке определ етс регулируемой в широких It is also known that a device for mechanical abrasion of samples, equipped with an electromagnetic drive, containing a grinding mortar, and a ball whose oscillation frequency in a mortar is determined to be adjustable in wide

пределах частотой колебаний электромагнитного привода 2 3.limits of the oscillation frequency of the electromagnetic drive 2 3.

Недостатками этого известного устройства вл ютс сложность конструкции электромагнитного привода с регулируемой частотой колебаний,.невысока производительность и ограниченна возможность использовани дл обработки проб малой массы из-за натира в пробу материала ступки и шара. Наиболее близким по технической сущности к предлагаемому вл етс устройство дл истирани проб, содержащее цилиндрическую ступку с установленными на ней пестиком, один конец которого соединен с валом электропривода з.The disadvantages of this known device are the complexity of the design of the electromagnetic drive with an adjustable oscillation frequency, the low productivity and the limited use of a small mass for processing samples due to rubbing the material in the mortar and ball. The closest in technical essence to the present invention is a device for abrasion of samples containing a cylindrical mortar with pestles mounted on it, one end of which is connected to the shaft of the electric drive h.

Claims

However, this device is also complicated in design due to the use of two high-speed drives for the mortar and pestle and a special table for precise installation of the pestle in the mortar. Significant wear of abrasive elements occurs not only on the working base, but also on the side surfaces, a consequence. This is the contamination of the samples, especially the small mass, of the pestle and mortar, which reduces the quality of the samples being prepared. The purpose of the invention is to increase the quality of abrasion of the material and simplify the design. This goal is achieved by the fact that in a device containing a mortar with installed mortar. Mei pestle, one end of which is connected with the electric drive shaft, the internal cavity of the mortar has the shape of a truncated cone, the pestle is made with a cavity in which the drive shaft is installed, and on the side surface of the pestle there are two symmetrically located flats, and the working surface of it is made with profiled chamfers. FIG. schematically / represented is a general view of the device, in Fig. 2 a section A - A in Fig. 1, in Fig. 3 - a section. B - B in FIG. The device for abrasion of samples contains a cylindrical mortar 1, the internal cavity of which is made in the form of a truncated cone 2, the angle of inclination of the side walls of which is 5-10 °, which ensures a natural crumbling of thin material from them. In the internal cavity 2 there is a cylindrical hollow self-centering pestle 3. Mortar 1 and pestle 3 Closed with a lid 4, which is made of a transparent material, such as Plexiglas, and can serve as a holder for a mortar 1. Mortar 1 and pestle 2 are made of mineral ceramics of the type CM-332, which is complete it completely eliminates contamination of samples of materials from abrasive elements. Inside cavity 5 of the pestle -3 has a profile that corresponds to the profile of the drive shaft of the electric drive comprising it, including the electric motor 7 and the gearbox 8. On the lateral surface of the cylindrical pestle 3 there are two symmetrical flats 9 and 10 between them, and butt end 11 in diametrically opposite quarters of diameter to flats 9 and 10 remove profiling chamfers 12 and 13. Adjustable pressure device 14 is installed in gearbox housing 8 placed on electric motor 7, which is fixed by means of bracket 15 and 16. The device operates as follows. Pre-prepared for abrasion, for example, by spectral analysis, a sample of material in the amount of 250 mg and initial size less than 1 mm is poured into mortar 1 and pestle 3 is placed in it. 3 The shaft of the electric drive shaft is inserted into the internal cavity 5 of the pestle. Then the mortar 1 is fixed in the holder of the holder 4. The motor 7 is turned on, which through the gearbox 8 and the shaft stem 6 rotates the pestle 3. As it rotates, accompanied by the mixing of the material, which gradually gets into the cavities formed by the chamfers 12, 13 and the working base mortar 1, there is abrasion of the sample no more than 2.min. After this time has elapsed, the motor 7 is disconnected and the mortar 1 is unloaded. The size of the material to be abraded is less than 40-20 microns. Thus, the proposed device allows improving the quality of sample abrasion by obtaining a final product of fine grades with a high degree. wear out, completely eliminate contamination of samples with material of abrasive elements (according to numerous control analyzes, samples of even the hardest minerals, quartz, rutile - like zircon and others remain spectrally pure). In addition, the application of the invention provides for the use of several sizes of mortars and their corresponding pistils, as well as the creation of multi-position erasers operating from a single drive. The invention The device for abrasion of samples containing a cylindrical mortar with a pestle installed in it, one end of which is connected to an electric drive shaft, characterized in that, in order to improve the quality of abrasion of the material and simplify the device, the internal cavity of the mortar has the shape of a truncated cone, the pestle is made with a cavity in which the drive shaft of the drive shaft is installed, and on the side surface of the pestle two symmetrically flush flats are made, with its lower working surface made with “rofilirovan” GOVERNMENTAL chamfers. Sources of information taken into account during the examination 1. USSR author's certificate No. 107492, cl. At 02 September 19, 1956.

2. Electromagnetic mill Pulverisette-O firm Fritsch and K, Germany.

3.MIkzo - SchnellmUhle, - Firm Per (Retsch).