Yesterday, on Oct 2rd, 2018, we were pleased to meet our partners from Belgium and Ghana. We started our cooperation back in February 2018 and we may call it a success, since we have supplied our partners with more than 3 thousand tons of product. During the meeting we discussed the prospects for further cooperation and expanding our presence on the African market. Currently, Energosteel grinding balls are used in four countries of North Africa: Ghana, Burkina Faso, Benin, and Togo. Many thanks to our partners for the visit. We hope that in 2019 the number of mines and countries that use our grinding media will at the very least double!
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More photos at photo gallery EBA Global Outlook 2018 event, organized by the European Business Association was held on 18th of September. During the meeting, speakers and members of the business association discussed forecasts and prospects for business development in Ukraine for the next six months. Representatives of Energosteel company, as members of EBA, have listened opinions from the leading experts of different segment of economic, as well as have asked several burning questions concerning production to the high-ranking representatives of the business elite of Ukraine.
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There are several methods for volumetric hardness measurement of grinding balls. The method for hardenability determining, namely, the method of end hardening with a hardness measurement interval from 1.5mm to 3mm (GOST 5657-69) takes as the basis of all methods. Hardenability – the steel ability of tempering at a certain depth from the surface to the center. We will consider the 4 most common methods for the volumetric hardness measurement of grinding balls in this article: 1. The method of volumetric hardness determination proposed in DSTU 3499-97 / DSTU 8538: 2015. This method consists of hardness measurement at all radius parts of grinding balls, averaging the values and determining the hardness by the formula: VH= 0,289 Тsurf+ 0,436 Т0,25 + 0,203Т0,5 + 0,063Т0,75 + 0,009 Тc Where: VH – volumetric hardness of grinding balls; Тsurf – surface hardness of grinding balls; Т0,25 – hardness at 0,25 of the radius depth; Т0,5 – hardness at 0,5 of the radius depth; Т0,75 – hardness at 0,75 of the radius depth; Тc – hardness at center of grinding ball; The hardness measurement scheme 2. The second method of volumetric hardness measurement used in Bulgaria. Measurement and calculation takes place by zones (4 zones correspond to radius parts as at DSTU 3499-97 […]
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More photos at photo gallery Energosteel Company has well known with Poland market since November 2008. We have supplied more than 10 000 tones of grinding balls at this market since that time. However, we didn’t fully understand the work specifics with customers, despite the long cooperation history with these market’s enterprises. That’s why, as well as, having a big desire to expand our presence in Polish market, Energosteel Company delegation visited a key grinding balls consumers in July 2018. Our delegation has visited the mining and metallurgical complex enterprises, the construction industry enterprises, as well as several grinding balls distributors. All meetings had a constructive nature. We had seen a big interest by customers in cooperation with grinding balls manufacturer. That’s why we, as partner, need to introduce shipment innovations for this country. We are not afraid the difficulties and focused on a result. We hope the quantity of our customers will increase soon.
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We mentioned repeatedly that Energosteel Company conducts constant marketing monitoring of grinding balls market. Lately there was an increase in instances of procurement of grinding balls of unknown origin that do not have necessary quality certificates. There were also occurrences when supplied product does have support documentation but it is falsified. As a rule, the balls in question are of very poor quality. Using those balls leads to the following consequences: occurrence of breakage of grinding media, uneven wear; raising of grinding media consumption rate; additional purchasing of grind media; decline in quality of grinding, reduction of grinding mill productivity; choking off the grates installed inside the grinding mill, by scrap from the broken ball; metal particles insertion into of the end product of grinding operation; damage to the technical equipment (pipes, pumps, sumps etc.); increased energy consumption for milling 1 ton of materials; ball mill downtime increase for emergency repair work etc. The situation at hand could happen even with a ball bought from a manufacturer (or its official distributor) and has all necessary quality certificates. But in the case when you are working directly with grinding media manufacturer (or its official distributor) you always can submit a claim […]
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Горно-обогатительный комбинат или сокращенно ГОК Современный горно-обогатительный комбинат представляет собой предприятие с замкнутым циклом добычи и переработки полезных ископаемых в твердом состоянии. Размещение в едином комплексе производственных структур, занимающихся извлечением рудного материала, последующей работой по созданию фракции нужных габаритов и обогащением стало необходимым из-за интенсивной разработки наиболее перспективных залежей с максимальным процентом полезных минералов. ГОК давно стал оптимальным инструментом для решения задач переработки ископаемых с целью повысить в них процентное содержание необходимых элементов. Обогатительный комбинат – главные подразделения В состав ГОКа входят несколько основных структур. 1.Участок добычи руды Процесс вскрытия пластов, содержащих полезные ископаемые или подземные выработки обеспечивают всю технологическую цепочку необходимым сырьем. 2.Транспортный цех Важнейшая артерия вывоза руды с места добычи на фабрики. ГОКи используют все виды транспорта в зависимости от специфики конкретного технологического процесса. Данная структура способствует снабжению участков измельчения, своевременно поставляя на них необходимые комплектующие и расходные материалы, в том числе и мелющие тела, для бесперебойной работы. 3.Фабрики обогащения и окомкования Здесь происходит первичная переработка и процесс получения обогащенного концентрата. Для достижения максимальной эффективности, важнейшим звеном являются участки шаровых мельниц, в которых при помощи помольных шаров материал измельчается до необходимой фракции. Многие горно-обогатительные комбинаты имеют в своей структуре фабрики окомкования. Здесь происходит ряд операций для образования окатышей […]
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Разрушение зерен исходной руды и их дальнейшее измельчение – главная задача, которая решается при помощи специального оборудования. Каждый ГОК имеет участок измельчения, где происходит окончательный помол руды в шаровых мельницах после предварительного дробления. Мелющие шары “превращают” поступившее сырье в промпродукт (концентрат) с оптимальными параметрами для дальнейшего обогащения. Барабанные модификации мельниц Такие агрегаты широко распространены на предприятиях горнорудного комплекса. Применяемые в них помольные тела позволяют добиться размера частиц меньше десятых долей миллиметра. При этом стоит отметить значительную энергоемкость барабанных конструкций. Горно-обогатительный комбинат отличается четко отлаженной структурой по разделению всех составляющих технологического процесса. Мельницы представляют в этой цепочке очень важное звено. В общих чертах принцип работы подобного оборудования выглядит так: полый барабан начинает вращаться методом передачи ему вращения через промежуточный вал от двигателя; в приемную часть поступает исходный материал; находящиеся внутри цилиндра мелющие тела в результате перемещения и падения с высоты разрушают частицы руды или другого компонента; находящиеся на патрубке выгрузки спирали отбирают измельченный до требуемых размеров материал, который поступает на дальнейшие узлы технологической цепи. Особенности барабанных мельниц Все ГОКи оборудованы двумя видами агрегатов в зависимости от конструкции опорного устройства: С опирающимися на подшипники скольжения пустотелыми цапфами. Правильная шабровка бобита, залитого на вкладыше, обеспечивает длительный и безаварийный срок службы. С опорой барабана […]
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It is generally accepted the harder grinding balls are better grinding balls. This is true in most cases, as a rule. However, sometimes there are situations when it’s necessary to use softer grinding balls for the material grinding (for example, grinding balls with surface hardness 48-50HRC). This depends on the material grinding hardness, the armor condition and armor quality, in most cases. It is worth paying attention to one nuance: the existing regulatory documents for grinding balls (GOST 7524-2015 and DSTU 8538-2015) during ordering and buying such grinding balls. These documents regulate only the lower limit hardness range for each hardness group, i.e. grinding balls should have hardness not less than a certain value (this value is own for each hardness group). Here you can see the current standards for steel grinding balls. The hardness range upper limit is not controlled. Therefore, during buying grinding balls with the second hardness group or with surface hardness at least 49HRC, you can get the grinding balls with surface hardness higher than that expected (for example, 65HRC). You will not be able to raise a claim to supplier after receiving such grinding balls because manufacturer didn’t violate the requirements of DSTU and GOST […]
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Why do we need standards? If there are no standards for the products production then will be chaos in the country, because each enterprise of every industry will produce products not guided by the quality and consumers requirements. The general interstate standards GOSTs operated earlier in Ukraine (firsts of them approved in 1940-th). Ukraine became its independent in 1991 and there was a need in own state standards – DSTU (“State Standards of Ukraine”). The above mentioned standard entitles to control the products quality on the country territory and in case of non-compliance – strictly punish. Ukraine has began to develop DSTU for products and requirements, norms and rules, terms, concepts and designations, technology and production, standards for the interconnection and joining various science and culture fields since 1993. The DSTU establishment provided by specially created standardization committees (Technical Committees (TC)). Technical Committees consist of researchers (including candidates of technical sciences, doctors, academicians, professors, etc.), departments and ministries, standardization members, organizations competent in a certain industry and having a scientific and technical potential. The national standards of Ukraine creating principle described in DSTU 1.2:2003 “National standardization. Rules for the national regulations development” DSTU development and introduction provided according to the […]
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The fineness grinding (the grinding quality) depends on the ratio the grinding media surface area (S) to grinding media volume (V). The greater this ratio value means the greater fineness grinding, i.e. more qualitatively grinding. The following table summarizes all physical and geometrical data of the most commonly used grinding media. Grinding media size, mm Grinding media mass, kg Surface area, sq.mm Volume, cmm The ratio of surface area to volume Grinding media quantity in one cubic meter The 100mm steel grinding ball 4,620 31 400 522 025 0,060 1 532 The 90mm steel grinding ball 3,410 25 434 380 556 0,067 2 102 The 80mm steel grinding ball 2,350 20 096 267 277 0,075 2 993 The 70mm steel grinding ball 1,600 15 386 179 055 0,086 4 468 The 60mm steel grinding ball 0,980 11 304 112 757 0,100 7 095 The 50mm steel grinding ball 0,580 7 850 65 253 0,120 12 260 The 40mm steel grinding ball 0,294 5 024 33 410 0,150 23 945 The 30mm steel grinding ball 0,128 2 826 14 095 0,201 56 759 The 25mm steel grinding ball 0,064 1 963 8 157 0,241 98 080 The 20mm steel grinding ball […]
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Two types of grinding media: the steel grinding balls and cast-iron cylpebs used as a grinding media, in most cases, at the middle of the last century. The grinding balls with large diameters have used for coarse grinding, and the cylpebs have used for fine grinding. This situation has been caused by the limited technological possibilities of grinding media (grinding balls) production. The 40mm steel grinding balls has been the smallest produced size. These grinding balls use has been not sufficient to achieve the required grinding fineness with fine grinding. Purchase the grinding balls with smaller diameters has been impossible in abroad. In connection with this, the 27x32mm, 28x28mm and 35x35mm cast iron cylpebs have become widespread. Their production doesn’t require any innovations in the casting industry, both in sand molds and in chill molds. Main defect such grinding media: a very high level of specific consumption, uneven abrasion (cylpebs wear to triangle), gates presence. However, nobody paid attention to this in the planned economy. In addition to high specific consumption and uneven abrasion, cylpebs didn’t guarantee the necessary grinding fineness. Already at that time, the grinding balls with small diameters to obtain fine grinding had widely used abroad. The […]
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The Interdepartmental Commission on International Trade (ICIT) has considered the appeal of РJSC “ArcelorMittal Kryvyi Rih” to conduct a special investigation into the import the rebar and wire rod into Ukraine from the Russian Federation. Upon review of this treatment, ICIT adopted to impose a final anti-dumping duty in the amount of 15.21% on 6-40 mm rebar (inclusive) and the 5.5-14 mm wire rod (inclusive), imported from the Russian Federation on 28th December 2017. These products can be classified in accordance with the Ukrainian Classification of Goods for Foreign Economic Activities (UCGFEA) on codes: 7213 10 00 00, 7213 91 10 00, 7213 91 20 00, 7213 91 41 00, 7213 91 49 00, 7213 91 70 00, 7213 91 90 00, 7213 99 10 00, 7213 99 90 00, 7214 20 00 00, 7214 99 10 00, 7214 99 39 00, 7214 99 50 00, 7214 99 79 00, 7214 99 95 00, 7227 20 00 00, 7227 90 10 00, 7227 90 50 00, 7227 90 95 00, 7228 20 91 00, 7228 20 99 00, 7228 30 20 00, 7228 30 69 00, 7228 30 89 00. However, these codes have a fairly wide application and in […]
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The Energosteel Company mastered the new diameter of grinding balls in June 2018. An experimental batch the 110 mm grinding balls has produced for the first time and it has launched into production from the first billet with a minimum stand settings. This batch has showed a high hardness values, the 56-62 HRC surface hardness of , and the 45,3-48,7HRC volumetric hardness and corresponds to the 4 hardness group (according to DSTU 3499-97) and the 5th hardness group (according to the new state standard for steel grinding balls DSTU 8538 : 2015). Grinding balls have been successfully tested for the impact resistance. 110 grinding balls have been selected from a batch for the experiment. Each selected ball sustained the total impact energy of 168437 J without destruction.
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Energosteel Company continues to expand new sales markets. Thus, the steel grinding balls by Energosteel production were delivered to one of the West Africa countries in the first quarter of 2018 for the first time. As is known, the West Africa countries have a huge natural resources reserves and mining industry is one of the main branches at region.West Africa countries produce gold, manganese, bauxite, diamonds; and also – kaolin (white clay), siliceous sand and mica. A rather complicated task has faced for our production department – to produce the 25-125mm steel grinding balls with hardness not less than 50 HRC in the center of the balls. None of grinding media producer at the CIS countries has taken to implement this kind of balls, because the requirements for grinding balls are higher at several times than requirements for grinding balls the 3rd or 4th hardness group according to DSTU 8538:2015 and GOST 7524-2015. Also, certain difficulties caused the delivery conditions of grinding balls, namely – a large volume shipment by sea containers. The equipment of our plant and the developed technologies for grinding media production have made possible to produce grinding balls with a quality completely corresponding to the consumer […]
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ENERGOSTEEL Company representative has been invited as participant of business breakfast organized by the Prozorro team, as the main manufacturer and supplier of ball-rolling products in Ukraine and beyond its borders. The general director of “Prozorro” Vasily Zadvorny, Deputy Director of the Public Procurement Regulation Department of the Economic Development Ministry Natalia Shimko and other representatives of public authority, industry and trade as main users of the electronic trading platform have been participation in the business breakfast. Issues related to the process of participation in tenders, as well as issues involving participation in public procurement and ways to resolve them discussed on the meeting. The meeting participants discussed about 30 blocks of the procurement process with electronic platform “Prozorro” using, сonsidered the problems faced by suppliers and buyers during government procurement (documents for participation in tenders, unscrupulous competitors identification and ways to protect against them), and most “loud” and large tenders conducted at the “Prozorro” platform. The main “highlight” of the meeting was discussion the draft law “On Amendments to the Law of Ukraine “On public procurement ” and some other legislative acts of Ukraine”” (hereinafter – the “Draft”). The project was registered in the Verkhovna Rada at 13.04.2018 and […]
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As we informed you earlier, the steel grinding balls produced by Energosteel Company can be used as grinding media in ball mills, regardless of the armor plates material (steel or rubber). Technical specialists of Energosteel Company constantly contact with customers, in order to obtain feedback on the grinding balls quality, information about our customers’ plans for changing the grinding process parameters. We have found out, one our partner, who has been cooperating with us for more than five years and use 30-40 mm steel grinding balls the fourth hardness group, decided to change the steel armor plate for rubber armor plate in the beginning of 2018. The client has changed armor plate type. He has previously used the armor plates with lifters and he has changed it to the “wave” armor plates type. This armor plate type will ensure the transition from a mixed motion mode of grinding balls to a cascade motion mode. We have provided all information confirms the rubber armor plates use doesn’t affect to the Energosteel steel grinding balls work quality in any way. Energosteel Company specialists have announced benefits the client will receive during use this armor plate type: reduction of the grinding media specific […]
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We have noted in an earlier published article, one of our client has decided to change the grinding balls diameter use by them own initiative. The 90mm grinding balls by Energosteel production have used for material grinding at client’s enterprise. The reason for diameter change was client’s desire try to increase the mill’s productivity by grinding balls mass increasing in the mill and maintaining the previous volume the mill filling (recall, one cubic meter of the 90 mm grinding balls weighs less than one cubic meter of the 80mm grinding balls). The customer’s specialists have consulted with the technical support department of Energosteel Company about conditions for such tests providing before them beginning. The specialists decided the best way for the tests conduction is test providing “from scratch”, i.e. make a complete steel grinding balls unloading from the mill and fill it with a trial lot. New 60mm and 80mm grinding balls (30 tons of each diameter), as well as the 50-80mm grinding balls unloaded from the mill (35 tons) have used as a loaded grinding mixture. The grinding balls with a diameter less than 50 mm are waste and have not loaded into mill, because grinding balls operate in […]
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More photos at photo gallery We will inform our readers about an industrial experiment of comparison the specific consumption 40 mm steel grinding balls the fourth and fifth hardness groups (DSTU 8538-2015) in this publication. The test has provided by the substitution method. I.e. the mill with grinding balls the fourth hardness group will be load by the grinding balls the fifth hardness group. Customer has used the 40 mm steel grinding balls the fourth hardness group produced by Energosteel Company in material grinding for several years. The mill with grinding media has the 62-63 tons grinding media loading rate. The loading will be providing by 1 ton of grinding media per day, according to the technical negotiations results. A replacement period has been calculated by taking into account the loading rate, the grinding balls quantity in the mill and the hardness difference of compared grinding media. A replacement period will be three months. Industrial test began the 01.12.2017. The mill stopped in mid-March. Instrumental measurement the mill filling degree by grinding media has conducted. Samples have taken for determination the grinding balls average diameter in the mill. The mill operation technological parameters have analyzed for the given period. Approximately […]
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