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“TECHNOLOGY TO IMPROVE THE TECHNOLOGY OF GYPSUM
PRODUCTION AND ENSURE THE OPERATION OF GYPSUM MILLS
WITHOUT DETERIORATION”
D.H.Nurmatov
Assistant.
B.M.Tozhiboev
Candidate Of Technical Sciences, Assoc.
S.Sh.Raxmonov
Assistent.
S.A.Umarov
Stajor O’qituvchi.
Kokand, Uzbekistan Kokand State University
https://doi.org/10.5281/zenodo.15356731
Annotatsiya:
This article analyzes the problem of the edibility of Raymond-
type mill catocs used in the gypsum manufacturing industry. The article will look
at the reasons for eating, available solutions and promising areas. Also, the
possibilities of producing edible-resistant catoxes using domestic raw materials
are analyzed.
Keywords:
Cathock, plaster, mill, edible, alloy, surface reinforcement,
technology, abrasive, import substitution.
The most common Raymond roller mills are used in the gypsum industry-
this is a serious problem in which the roller parts of the mills are quickly eaten
up by friction work, increasing the cost of the product and reducing the
efficiency of production. At the heart of this problem lies the high friction forces
between the roller and the material to be crushed. This friction leads to
intensive eating of the roller surface, changes in its geometric dimensions and,
as a result, to a deterioration in the productivity indicators of the mill. The
scientific problem that is envisaged to be solved in this research work is defined
as follows: due to the rapid ingestion of roller parts in Raymond roller mills in
the Gypsum industry, it consists in the development of materials science and
technological solutions to increase the working productivity of the mill and
reduce maintenance costs. The essence of the problem lies in the insufficient
resistance of existing steel materials to abrasive materials such as plaster.
Ordinary Steels, despite their high hardness and mechanical properties, are
quickly eaten in conditions of long-term friction. This creates the need for
frequent repairs and replacement of spare parts. There is also a technological
aspect to the problem. Current Surface reinforcement methods are not sufficient
to significantly increase the wear resistance of the roller. While existing methods
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(such as nitration) only increase hardness in the surface layer, but the softness
of the inside of the roller causes it to deform and fail quickly. In addition,
optimization of the operating mode of the mill is also important. Current mills,
often operating in non-optimal mode, cause overloading and rapid eating of
rollers. The loading of the mill, controlling the flow rate and moisture of the
material, helps to reduce the ingestion of the rollers. Most of the existing gypsum
mills operate on outdated technologies, which leads to low product quality and
high production costs. The rapid ingestion of cathocks, one of the main
components of gypsum Mills, causes frequent maintenance of equipment,
stagnation of production, and an increase in product cost. The catocs of these
mills are replaced on average at 5-6 months. Imported catocks, on the other
hand, are 2-3 times more expensive than domestic products. This reduces the
competitiveness of local gypsum manufacturers and leads to an increase in
prices for building materials.Within the framework of the project, the following
studies are planned to be carried out to solve these problems: The essence of
surface sanding (Poverkhnostnaya zakalka): Surface sanding is the process of
hardening the surface layer of a steel object by rapidly heating it to an austenitic
state and then rapidly cooling it. This process results in a martensite structure in
the surface layer, which provides high hardness and wear resistance. The price
of prepared catocks is much cheaper than imported catocks and can easily
compete with them even in terms of quality. The service life of the newly
manufactured catocks is effectively characterized by being longer than the
operating life of the existing Catocks and by being resistant to eating. During the
project, a significant increase in the edible resistance of Catocs is achieved. As a
result of the optimized technology of thermal processing and the application of
new materials, the life of the cathocks is extended by 2-3 times. The surface
layer of the roller will have a high hardness, which will increase its wear
resistance. As a result of increased wear resistance, the shelf life of the roller
increases. Adapted to local conditions, the technology for the production of
import substitutes and competitive catocks is created. This technology creates
new opportunities in the field of gypsum production. Due to the longer
operation of the cathocks, the cost of replacing the spare parts is reduced, which
makes the cost of gypsum products cheaper. Within the framework of the
project, scientific work is carried out on the basis of this project to attract
professors and teachers to scientific research, improve their skills and develop
scientific research to at least one PhD degree. In conclusion, this project has a
significant impact not only on the achievement of technological achievements,
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but also on the socio-economic development of our republic. Phase changes
(austenite, martensite, bainite) that occur in the alloy during the thermal
treatment of cathodes are studied on a scientific basis. The effect of heating
temperature, holding time and cooling rate on structure and properties in the
alloy is analyzed. In the process of thermal processing, the diffusion processes of
elements are studied. The movement of carbon throughout the alloy, the
formation of carbides and their role in increasing hardness are analyzed. The
thermal stresses generated during thermal processing and their effect on the
strength of the alloy are studied on a scientific basis. An optimal thermal
processing mode is developed to reduce stresses. Technologies aimed at
reducing emissions are used in the production of cathocks. For example, to
ensure minimal waste generation in the process of processing, cutting and
surface reinforcement of alloy materials.
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M.Karshiev, A.A. Sattarov, M.Yu. Rakhimov, S.A. Mukhtorov D.N.
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