Effect of Physical and Chemical Properties of Gray-Brown Soils Contaminated With Waste Aluminum Plant and Tube-Rolling Mill in Sumgait on Life Activity of Earthworms

Soil invertebrates are sensitive indicators of soil moisture. The occurrence of certain species can be an indicator of humidity or dryness of the habitat. Many researchers consider mesofauna to be one of the best bioindicators, since all actively moving species react to the slightest change in the environment by varying the number and violation of the ratios of trophic groups. To determine the main trends in soil dynamics using soil invertebrate gray-brown soils, such indicators as the quantitative ratio of individual groups, changes in the structure of the dominant representatives of the trophic structure, and distribution by soil profile are of primary importance. Special priority is given to studying the humus state of gray-brown soils associated with the pollution of natural biocenoses by technogenic waste.

Study of the Bioindicative Value of Invertebrate Animals of Grey-Brown Soils Contaminated by the Waste of the Aluminum Plant and Tube-rolling Mill of Sumgait

Soil animals are a very important biological factor in soil formation and the formation of high soil fertility. The soil is abundantly inhabited by numerous representatives of different groups of animals, for which it represents not only the habitat but also the result of their combined activity. Changes in soil invertebrate complexes are important indicators of industrial pollution. A study conducted on a natural cenosis grey–brown soils under wormwood–ephemeral vegetation contaminated waste Aluminum Plant and Tube–rolling Mill of Sumgait. Our purpose is to carry out soil and zoological research (as well as samples taken for microbiological analyzes) and on basis collected material and subsequent detection of a theoretical analysis of the major dominant groups bioindicators. Soil and zoological studies will help the future identify invertebrates that are most resistant to pollution factors, which can also be used as bioindicators of technologically polluted soils.

Study on Dynamic Characteristics of Hydraulic Pressure System of MPM Tube Rolling Mill

Now MPM mill is widely used in hydraulic servo control technology in the field of seamless steel pipe production. But the hydraulic control system has the defect of complex control, bigger load power, more disturbance factors, higher response speed requirement and so on, which are unfavorable for analyzing the impact of factors of steel rolling precision. The conclusions show that: the system model is conducive to the analysis of the factors that affect the rolling accuracy, and it provides a theoretical basis for study the dynamic characteristics of the system, the optimal design and so on.