scholarly journals The Effects of Dry and Wet Grinding Processes on The Salt Quality

2021 ◽  
Vol 328 ◽  
pp. 07011
Author(s):  
Nizar Amir ◽  
Makhfud Efendy ◽  
Rachmad Hidayat ◽  
Misri Gozan
Keyword(s):  
Salt Ponds ◽  
High Quality ◽  
Processing Industry ◽  
Solar Salt ◽  
Salt Particle ◽  
Advantages And Disadvantages ◽  
Wet Grinding ◽  
Grinding Method ◽  
Dry Grinding ◽  
Product Output

Studies were conducted on the salt quality, such as NaCl percent and whiteness achieved by dry and wet grinding methods. Crude solar salt is carefully collected from traditional solar salt ponds to ensure the uniformity of the sample. Several salt processing methods were applied in this research, such as washing, grinding, and dewatering by centrifuge hydro extractor and drying. The effect of reducing salt particle size to 0.6 and 0.25 mm was also studied. The dry grinding method is conducted before the washing stage, while the wet grinding method is applied after the washing stage. Both dry and wet grinding methods provide high-quality salt products, indicating high NaCl percent and whiteness. The dry grinding method produces higher NaCl percent and whiteness than the wet grinding method. However, the wet grinding method was better in water management and equipment durability with loss of salt losses during the washing stage. Finally, both grinding methods have advantages and disadvantages, so for developing the salt processing industry, both methods should be correctly chosen and match product output requirements.

Research and Analysis of Dry Crushed Waste Tire Processing

2011 ◽  
Vol 109 ◽  
pp. 228-231 ◽  
Author(s):  
Jia Yang ◽  
Song Ge Yang ◽  
Li Jun Qiu
Keyword(s):  
Particle Size ◽  
Powder Particle Size ◽  
Main Mode ◽  
Waste Tires ◽  
Waste Tire ◽  
Powder Production ◽  
Wet Grinding ◽  
Grinding Method ◽  
Cryogenic Grinding ◽  
Dry Grinding

For the treatment of waste tires and waste tire reuse has become an important task in today's society. Waste tire processing methods are: restructuring the use of the prototype. Energy use of waste tires as fuel will use high-temperature heating with thermal decomposition of waste tires, to promote its decomposition into oil, combustible gas, carbon. Scrap tire retreading. Powder production and other means. By mechanical means will be used after the tire tread and some other parts of the split will be obtained after crushing the powder material is powder. Currently the main mode of production has powder dry grinding, cryogenic grinding and wet grinding method. Different methods produce different particle size range of powder, powder surface morphology is also different. Dry grinding, wet grinding and cryogenic grinding of the legal system into a powder particle size in the range of 0.3 mm ~ 1.5 mm, 0.075 mm ~ 0.3 mm and 0.075 mm or less. Dry grinding method because of his production and processing simple process has been widely used in powder production process. For dry grinding process and mechanical work made for the research and analysis.

scholarly journals Experimental Study on Grinding Force of Zirconia Ceramics in Dry/Wet Grinding Environment

2018 ◽  
Vol 198 ◽  
pp. 02004
Author(s):  
Junping Zhang ◽  
Weidong Wang ◽  
Songhua Li ◽  
Han Tao
Keyword(s):  
Grinding Force ◽  
Grinding Wheel ◽  
Feed Speed ◽  
Zirconia Ceramics ◽  
Grinding Forces ◽  
Measuring Device ◽  
Linear Speed ◽  
Wet Grinding ◽  
Dry Grinding ◽  
Force Ratio

The impacts of different linear speed of grinding wheel, grinding depth and workpiece feed speed with or without grinding fluid on grinding force were studied by plane grinding machining of zirconia ceramics. The impacts of different machining environment and grinding parameter on normal and tangential grinding forceswere studied by testing the grinding force during grinding with a force measuring device. The studies showed that the normal and tangential grinding forces decrease with the increase of the linear speed of grinding wheel and increase with the improvement of grinding depth and workpiece feed speed. The grinding depth has the greatest impacts on the normal and tangential grinding forces in dry grinding environment; while in wet grinding environment, the grinding depth exerts the greatest impacts on the normal grinding force and the linear speed of grinding wheel imposes the greatest impacts on the tangential grinding force. In addition, it was found that the normal grinding force in dry grinding is minor than that in wet grinding, that the tangential grinding force in dry grinding is greater than that in wet grinding, and that the grinding force ratio in dry grinding is lower than that in wet grinding.

scholarly journals PERSONALIZED AND PROACTIVE ONLINE SERVICES AS A PLATFORM FOR CREATING A SYSTEM OF VOLUNTARY TAX COMPLIANCE

2021 ◽  
pp. 42-48
Author(s):  
Tatyana Vladimirovna Deeva
Keyword(s):  
Swot Analysis ◽  
Tax Compliance ◽  
Digital Transformation ◽  
Global Network ◽  
High Quality ◽  
Online Services ◽  
Administrative Services ◽  
Effective Work ◽  
Advantages And Disadvantages ◽  
Slow Development

Relevance. The article reveals the actual possibilities of introducing digital technologies in the field of tax regulation, the provision of administrative services to taxpayers. The author has carried out a SWOT analysis of electronic services of the tax service in the context of digital transformation, identified the opportunities and threats to the development of digital tax administration. In the context of universal digitalization, the study of the above issues is an urgent topic. Results. It has been established that digital transformation of taxation and tax procedures is a difficult and costly task for personalized online services, therefore it has the same advantages and disadvantages. Weaknesses in the implementation of online services in the field of taxation are identified: data security problems; lack of public presentation and ignorance of taxpayers; a certain part of the population lacks access to the global network, IT infrastructure and electronic services; too slow development of e-business and government; an acute shortage of regulatory framework and information in the IT sector. Conclusions. The FTS as a service department should provide inexpensive and high-quality services. In this regard, FTS specialists must quickly respond to any facts of improper provision of services, since the high quality of tax services and the maximum number of electronic services is an indicator of effective work with taxpayers.

Mechanochemical Polymorphic Transformation of Photocatalyst Material TiO2 and its Dependence on the Milling Operation

2011 ◽  
Vol 675-677 ◽  
pp. 283-286
Author(s):  
Guo Min Mi ◽  
Fumio Saito
Keyword(s):  
Phase Transformation ◽  
Titanium Dioxide ◽  
Polymorphic Transformation ◽  
Metastable Phase ◽  
Planetary Mill ◽  
Wet Grinding ◽  
Dry Grinding ◽  
Milling Operation ◽  
Lower Temperature ◽  
Tumbling Mill

Some dry and wet grinding experiments have been respectively conducted on titanium dioxide which is a noble photocatalyst material in a mortar, a tumbling mill and a planetary mill. Anatase is apt to transform to rutile via a metastable phase brookite in every kind of mills in the case of dry grinding. And it hardly takes place for phase transformation from rutile to other forms. It is shown that the kind of mill has not decisive effect on the mechanochemical polymorphic transformation of titanium dioxide, which merely influences the rate of phase transformation. On the other hand, the addition of other liquid media, such as water and acetone, is helpless for phase transformation of anatase. Only anatase can transform to metastable phase brookite by wet grinding. When ground titanium dioxide is heated, the amorphous phase is easier to transform to rutile than metastable phase brookite at lower temperature.

TRENDS IN THE USE OF PACKAGING MATERIALS AND PACKAGING METHODS FOR PRODUCTS CONTAINING LABILE BIOLOGICALLY ACTIVE SUBSTANCES

2020 ◽  
Author(s):  
Е.П. ВИКТОРОВА ◽  
А.Д. АЧМИЗ ◽  
М.В. ЛУКЬЯНЕНКО ◽  
С.О. СЕМЕНИХИН
Keyword(s):  
Biologically Active Substances ◽  
Biologically Active ◽  
Packaging Materials ◽  
High Quality ◽  
Advantages And Disadvantages ◽  
Concentrate Polymer ◽  
Oxidative Processes ◽  
Livestock Products ◽  
And Storage ◽  
Active Substances

При производстве качественной пищевой продукции особое внимание необходимо уделять ее упаковыванию и хранению. Витаминно-минеральные концентраты, используемые для приготовления пищевых продуктов и получения качественной безопасной продукции животноводства, содержат комплекс лабильных биологически активных веществ, для сохранности которых необходимо минимизировать окислительные процессы. Это обусловливает повышенные требования к упаковке таких продуктов. С целью выбора упаковочного материала и способа упаковки витаминно-минерального концентрата проведен тематический обзор публикаций отечественных и зарубежных ученых. Рассмотрены тенденции в области применения упаковочных материалов, указаны преимущества и недостатки биополимеров. На основе проведенного анализа установлено, что для упаковывания витаминно-минерального концентрата целесообразно в качестве материала упаковки использовать полимерные пленки, обладающие высокой свето- и газонепроницаемостью, позволяющей снизить скорость протекания окислительных процессов и, следовательно, сократить потери содержащихся в продукте лабильных биологически активных веществ. В качестве способа упаковки можно рекомендовать применять вакуумирование, обеспечивающее отсутствие кислорода воздуха в упаковке. When producing high-quality food products, special attention should be paid to their packaging and storage. Vitamin and mineral concentrates used for food preparation and production of high-quality safe livestock products contain a complex of labile biologically active substances, for the safety of which it is necessary to minimize oxidative processes. This leads to increased requirements for the packaging of such products. In order to select the material and method of packaging of vitamin and mineral concentrates, a thematic review of publications of domestic and foreign scientists was conducted. Trends in the use of packaging materials are considered, advantages and disadvantages of biopolymers are indicated. It was found that for packaging vitamin and mineral concentrate, polymer pellicle with high light and gas tightness, which allows reducing the rate of oxidative processes and, consequently, reducing the loss of labile biologically active substances contained in the product, should be used as a packaging material. Vacuuming, which ensures the absence of oxygen in the air in the package, can be recommended as a method of packaging.

Hot Isostatic Processing

2004 ◽  
pp. 55-60
Keyword(s):  
Aluminum Alloy ◽  
Hot Isostatic Pressing ◽  
High Quality ◽  
Advantages And Disadvantages ◽  
Radiographic Inspection ◽  
Hot Isostatic Processing ◽  
Alloy Castings ◽  
And Performance ◽  
Hip Process ◽  
Very High

Abstract Hot isostatic pressing (HIP) is a process refinement available to address internal porosity in castings. The HIP process may be used, in particular, for applications requiring very high quality and performance. This chapter discusses the principles, advantages, and disadvantages of HIP. It describes the effect of HIP on tensile properties and on the fatigue performance of aluminum alloy castings. In addition, the chapter discusses the processes involved in radiographic inspection of HIP-processed castings.

Models of Service Development and Delivery for People with Intellectual Disability

2020 ◽  
pp. 289-296
Author(s):  
Sujeet Jaydeokar ◽  
John Devapriam ◽  
Jane McCarthy ◽  
Chaya Kapugama ◽  
Sabyasachi Bhaumik
Keyword(s):  
Intellectual Disability ◽  
Service Delivery ◽  
Healthcare Services ◽  
Service Development ◽  
High Quality ◽  
Quality Healthcare ◽  
Advantages And Disadvantages ◽  
Service Delivery Models ◽  
Specialist Services ◽  
Delivery Models

It is important to ensure that people with intellectual disability (ID) have access to high quality healthcare services. There is a wide variation in the availability of services and service delivery models globally for people with ID. Reasons for these variations are examined including availability of workforce resources and the development and availability of specialist resources. Tracing the development of services across the world, the chapter goes on to review the ongoing debate on access to generalized healthcare services versus the role of specialist services. We review advantages and disadvantages of different service delivery models. While these models have evolved in response to the political, cultural, and economic environment, it is important that any development of service delivery model signs up to basic underlying principles of person-centred, right-based, and outcome-focused approach. This should be undertaken in partnership with service users and carers in the spirit of co-production and with the underlying principles of choice, inclusion, rights, and independence. Any service development should also ensure that it would meet the complex health needs of people with ID as described in the tiered model of services with an efficient use of available resources. It should be sustainable through development of skills, competencies, and capabilities of the workforce and agencies that work with people with ID. There are number of examples across countries of innovative service provisions by public, private, and voluntary sectors as described in the chapter and it is important that we learn from those models. Advocating should be an integral aspect of any service delivery; we should be constantly advocating globally for high quality healthcare based on the best available evidence for people with ID.

scholarly journals Indirect Laryngeal Surgery in the Clinical Voice Laboratory: The Renewal of a Lost Art

2000 ◽  
Vol 79 (5) ◽  
pp. 350-361 ◽  
Author(s):  
Norman D. Hogikyan ◽  
Melissa Pynnonen
Keyword(s):  
Cost Effectiveness ◽  
General Anesthesia ◽  
Recent Literature ◽  
Low Cost ◽  
Cost Effective ◽  
Topical Anesthesia ◽  
High Quality ◽  
Advantages And Disadvantages ◽  
Laryngeal Surgery ◽  
Type Of Surgery

Since the advent of precision instruments and safe techniques for direct laryngoscopic surgery under general anesthesia, indirect laryngeal surgery has become very uncommon. A review of the recent literature finds that few authors advocate indirect surgery under topical anesthesia, and many otolaryngologists dismiss this technique as being either of only historical interest or an idiosyncratic method practiced only by a handful of clinicians. The societal mandate for cost-effective healthcare and the availability of relatively low-cost, high-quality endoscopes and video equipment warrant a renewed and broader interest in this type of surgery. In this article, we review a series of 27 indirect surgical procedures performed under topical anesthesia in the clinical voice laboratory. We discuss the indications, outcomes, advantages, and disadvantages of this surgery, and we present a brief analysis of its cost-effectiveness. We conclude that indirect laryngeal surgery in the clinical voice laboratory is an effective, safe, efficient, and less costly alternative to some procedures routinely performed under general anesthesia.

scholarly journals Mechanochemical Treatment to Remove Arsenic from Copper Ore

Minerals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 349
Author(s):  
Shingo Ishihara ◽  
Kozo Shinoda ◽  
Junya Kano
Keyword(s):  
Arsenic Removal ◽  
Chemical Activation ◽  
Xrd Analysis ◽  
Mechanochemical Treatment ◽  
Copper Ore ◽  
Wet Grinding ◽  
Dry Grinding ◽  
Grinding Conditions ◽  
Diffraction Peaks ◽  
Comparison Of The Results

This study tested the removal of arsenic from copper ore concentrate via a mechanochemical treatment by planetary ball milling. The harmful components of ore, such as arsenic, are increasing year by year and decreasing the copper grade, therefore there is a strong need to improve the separation of arsenic from copper ore. The effect of grinding as a result of chemical activation caused by mechanochemical treatment was evaluated by XRD and X-ray absorption spectroscopy (XAS) measurements. From the results of the XRD analysis, several crystalline minerals were identified from the original samples. The diffraction peaks of the original samples were reduced by grinding, although grinding did not generate any new diffraction peaks. The comparison of the results of grinding in dry and wet conditions showed that the rate of disappearance of the crystalline minerals was faster in dry grinding than in wet grinding. To clarify the chemical state of arsenic in copper ore, XAS analysis was carried out. The results indicated that the arsenic compound changed from sulfide, in the original sample, to oxide after grinding. As a result of oxidation, the arsenic was easy to dissolve in a water and alkaline solution, and optimized dry and wet grinding conditions achieved up to 76% arsenic removal efficiency.

scholarly journals Two-Dimensional Materials in Large-Areas: Synthesis, Properties and Applications

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Ali Zavabeti ◽  
Azmira Jannat ◽  
Li Zhong ◽  
Azhar Ali Haidry ◽  
Zhengjun Yao ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Large Area ◽  
Large Crystal ◽  
High Quality ◽  
Future Technology ◽  
Advantages And Disadvantages ◽  
Grain Sizes ◽  
Two Dimensional Materials ◽  
Synthesis Properties ◽  
Synthetic Routes

AbstractLarge-area and high-quality two-dimensional crystals are the basis for the development of the next-generation electronic and optical devices. The synthesis of two-dimensional materials in wafer scales is the first critical step for future technology uptake by the industries; however, currently presented as a significant challenge. Substantial efforts have been devoted to producing atomically thin two-dimensional materials with large lateral dimensions, controllable and uniform thicknesses, large crystal domains and minimum defects. In this review, recent advances in synthetic routes to obtain high-quality two-dimensional crystals with lateral sizes exceeding a hundred micrometres are outlined. Applications of the achieved large-area two-dimensional crystals in electronics and optoelectronics are summarised, and advantages and disadvantages of each approach considering ease of the synthesis, defects, grain sizes and uniformity are discussed.

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