Assessment of Pyrometallurgical Scheme Options of Red Mud and Scale Co-processing

The analysis of various options for the use of alumina production wastes (red mud) and oiled scale using various methods of agglomeration to produce conditioned commercial iron is presented. Co-processing utilization of red mud and oiled scale allows to obtain raw materials with an iron content of more than 50%, which meets the modern requirements for charge materials for use in the blast furnace process. The calculation analysis carried out using a mathematical model of blast furnace process, allowed to determine the optimal proportion of the iron-containing material for the partial replacement of charge materials without reducing the technical and economic indicators of blast furnace smelting. Keywords: Bayer process, red mud, oiled scale, mathematical model, blast furnace process, metallurgical properties, complex utilizatio

AUTONOMIC STATUS OF PERITONEAL DIALYSIS PATIENTS AND ITS RELATION WITH INDICATORS OF LIPID METABOLISM

The research objective had been to evaluate the autonomic status in peritoneal dialysis (PD) patients and to identify its lipid metabolism interaction. Patients and methods. During the research process 40patients had been examined who received continuous ambulatory peritoneal dialysis (CAPD). The autonomic status was studied using the questionnaire (A.N. Wayne test) and sympathetic skin response (SSR) by electroneuromyograph «Neuro–MEP–4». 20 conventionally healthy individuals formed the control group matched according to age and sex. Results. Obtained questionnaire data showed clinical symptoms of autonomic dysfunction in 37 cases among 40 (92,5%) PD patients. Analysis of the correlation level of autonomic disorders with lipid metabolism showed a significant dependence with the concentration of high density lipoprotein (HDL) (p=–0,43;p=0,01), low density lipoprotein (LDL) (p=0,55; p=0,001) and atherogenic index. Also a comparative analysis of the main CSAP PD patients’ indicators and conditionally healthy individuals showed a statistically significant decrease in the amplitudes of the first and second phases of SSR. Also SSR results analysis in conjunction with the autonomic disorders clinical implications afforded the ground for the lower extremities polyneuropathy diagnosis in 18 cases among 25 (72%) patients. Moreover, the study of lipid profile showed the correlation of total cholesterol (TC) with all studied SSR parameters: A1 (r=0,64; p=0,0006), A2 (r=0,79; p<0,0001), latent period (LP) (r=–0,45; p=0,04). Conclusions. The autonomic status of CAPD patients is characterized by low level of vegetative regulation total power and the imbalance of sympathetic and parasympathetic influences in comparison with conventionally healthy individuals and it is correlated with lipid spectrum

НОВАЯ ТЕХНОЛОГИЯ СОВМЕСТНОЙ ПЕРЕРАБОТКИ ТЕХНОГЕННЫХ ОТХОДОВ

From the results of reduction smelting of agglomerated cakes from leaching mixtures of greasy mill scale (GMS) with 75 and 100 % of red mud (RM) and fired pellets made from these agglomerated cakes, the possibility of selective separation of Fe, P and Ga in pig iron, and Al2O3, TiO2, Sc2O3 – in slag suitable for cement production has been established. We found that, depending on the melt holding period (20–60 min at temperature of 1620 °C), the following elements (in %): 98 Fe, 22–66 Si, 1 S, 99 P, 11–20 Ti, 98–99 Ga pass into pig iron. The compounds (in %): 95–99 Al2O3, 55–65 SiO2, 88–90 TiO2, 98–99 Sc2O3 are concentratedin the slag. The process flow diagram of GMS and RM joint utilization has been developed.По результатам проведенных восстановительных плавок кеков от выщелачивания смесей замасленной прокатной окалины (ЗПО) с 75 и 100 % красного шлама (КШ) и обожженных окатышей, приготовленных из этих кеков, установлена возможность селективного разделения компонентов исходных материалов с концентрированием Fe, P и Ga в чугуне, а Al2O3, TiO2, Sc2О3 – в шлаке, пригодном для производства цемента. Показано, что в зависимости от продолжительности выдержки расплавов (20–60 мин при температуре 1620 °С) в чугун переходят, %: 98 Fe, 22–66 Si, 1 S, 99 P, 11–20 Ti, 98–99 Ga.В шлаке концентрируются, %: 95–99 Al2O3, 55–65 SiO2, 88–90 TiO2, 98–99 Sc2О3. Разработана технологическая схема совместной утилизации ЗПО и КШ

Imbalance in the oxidative stress system-antioxidant protection in patients with chronic pyelonephritis depending on the course of the diseas

Assessment of the imbalance in the system of oxidative stress - antioxidant protection in patients with chronic pyelonephritis depending on the course of the diseas

ИССЛЕДОВАНИЕ СВОЙСТВ ГЕРМАНИЙСОДЕРЖАЩЕГО СЫРЬЯ ПАВЛОВСКОГО БУРОУГОЛЬНОГО МЕСТОРОЖДЕНИЯ

There were investigated physical and chemical properties of germanium-contained raw materials of Pavlovsk deposit (coal, aleurolite) and secondary material (slag of stratified burning of coal) for the purpose of modern technology development in respect of germanium concentrates receiving.Исследованы физико-химические свойства германийсодержащего сырья Павловского месторождения (угля, алевролита) и вторичного материала (шлака слоевого сжигания угля) с целью разработки современной технологии получения германиевых концентратов

Investigation on the association of cardiovascular markers with severity of chronic pyelonephritis

Chronic kidney disease (CKD) is an established independent risk factor for cardiovascular disease (CVD) and is caused by chronic pyelonephritis (CP). This study aimed to investigate the effect of the association of cardiovascular markers with the course of CP on the comorbidity of CP with ischemic heart disease. The study participants included 125 patients with CP without symptoms of urinary tract obstruction who were divided into three group

Mechanisms of Development of Heart Failure in Chronic Kidney Disease

The study of scientific data over the past 5 years has shown that cardiorenal syndrome, which has a complex and multifactorial pathophysiology, is a clinical problem. Modern pharmacological methods of treatment are effective, but insufficient to satisfactorily influence or mitigate the progression of cardiorenal syndrome, therefore, the discovery of new drugs and new therapeutic strategies for cardiorenal syndrome is a high priority tas

ПРИМЕНЕНИЕ ЭЛЕКТРОПЕЧЕЙ ПОСТОЯННОГО ТОКА ДЛЯ ПЕРЕРАБОТКИ УРАЛЬСКИХ ОКИСЛЕННЫХ НИКЕЛЕВЫХ РУД

Base principles of selecting compositions of the charge and processing products depending on the initial ore composition and required ferronickel composition are developed. Main production parameters of smelting are the gas temperature under the roof of 1000– 1100 °C and rarefaction of 0,5–1,5 Pa. The processing technology of the oxidized nickel ore with the acquisition of 20 % ferronickel (according to ISO 6501:1988) using the dc ore-thermal furnace is substantiated. The advantage of this process is in the fabrication of metal with a high nickel content, an increase in recovery of valuable components into the alloy, and processing fine and dust-like materials. Разработаны базовые принципы подбора составов шихты и продуктов переработки в зависимости от состава исходной руды и требуемого состава ферроникеля. Основными технологическими параметрами плавки являются: температура газов под сводом – 1000–1100 °С, разрежение – 0,5–1,5 Па. Обоснована технология переработки окисленной никелевой руды с получением 20 %-ного ферроникеля (по ISO 6501:1988) с использованием рудно-термической печи постоянного тока. Достоинства этого процесса заключаются в получении металла с высоким содержанием никеля, повышении извлечения в сплав ценных элементов и возможности переработки тонких и пылевидных материалов.

Assessment of allergen tolerance breakdown levels in local and classical allergic rhinitis

Local allergic rhinitis, a new endotype of allergic rhinitis discerned by researchers of the Spanish Allergy School, is now in the focus of interest of international allergological community. A special feature of local allergic rhinitis, which, being similar to conventional signs of allergic rhinitis, is, however, characterized by absence of systemic atopy manifestations, e.g., an increased total serum IgE content and positive allergic skin tests. In order to assess the level of tolerance breakdown to allergens in local and classical allergic rhinitis, we have studyed concentrations of IL-4, IL-22, and IFNγ in three biological fluids, blood, nasal secretions, and skin exudate. The whole study cohort consisted of 82 patients aged 18 to 60 years with established allergic rhinitis. The diagnosis was based on counseling by allergologist/immunologist, including clinical case history and possible inheritance of atopy as well as videorhinoscopy performed by an ENT specialist. The procedure of videorhinoscopy allowed to specify allergic origin of rhinitis and exclude the patients with non-allergic forms of the disease, but it did not enable us to differentiate between the endotypes of classic and local allergic rhinitis. Subsequently, all patients have been divided into two subgroups based on the criteria of systemic atopy: (1) with a high content of serum total IgE and positive skin allergy tests (n = 41) and (2) with a significantly lower concentration of IgE and negative allergy tests (n = 41). It was concluded that the patients with classic allergic rhinitis prevailed in the 1st subgroup, whereas local rhinitis predominated in the 2nd group. The study of IL-4, IL-22 and IFNγ concentrations in the three biological fluids allowed us to presume that the 1st subgroup was characterized by increased content of IL-4 and IL-22 in blood and skin exudate in comparison with controls, and the 2nd subgroup showed a decrease in IFNγ to control values. The cytokine concentrations in nasal secretions were not representative for the subgroups studied. The result has been interpreted as the absence of tolerance breakdown to causal allergens in the patients with local allergic rhinitis at the systemic level. The obtained data could be used in development of a diagnostic biomarker system for this specific endotype of allergic rhinitis, thus avoiding potential diagnostic errors which occurred in the past, when this endotype was classified as non-allergic form of the disease, thus administering non-adequate treatment, e.g., allergen-specific immunotherapy, which could be prescribed in these cases