The operational efficiency of a coke plant depends on three vital aspects: first, the produced coke should meet the quality standards required for the use of modern blast furnaces; second, the environmental consideration; and third, the cost of the coke.
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Coal additives have a function to improve the calorific value of coal and improve combustion efficiency. Some pulverized coal samples were prepared based on ASTM D2013/D2013M18, then mixed with coal additives until homogeneous. The lab instruments are the bomb calorimeter and the proximate analysis.
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Many coal blending theories have been proposed for producing coke of a specific targeted quality by blending various kinds of coals. For example, Jo (1965) considered that coal consists of two components, a fibrous component and a caking component, and that increasing the strength of fibrous component (coal rank) and the addition of a suitable amount of caking component (caking property) are ...
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Adding additive to the coal is an option and has grabbed the attention of many researchers for developing an additive. These additives for coal can effectively improve the combustion performance of the coal. This review paper contributes information about the impact of additives on coal combustion properties, coal calorific value, binder for ...
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YES the boiling point of gasoline can be raised (or lowered) by an additive depending on what it is as can the autoignition temperature which will increase "knock" using the right additive for the fuel you just bought and put in your tank is the trick and it is always going to be hit and miss depending on what refinery produced the ...
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Introducing additives to concrete manufacturing processes could reduce the sizeable carbon footprint of the material without altering its bulk mechanical properties, ... While the energy required for this heating process could eventually be substituted with electricity generated from renewable solar or wind sources, the other half of the ...
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It obtained that the antioxidant additives increase the BTE and HC, CO Smoke emissions, and decreases EGT and NOx emission. However, BHA has shown a better performance than BHT in all emission and performance parameters. The reduction of EGT is due to the presence of antioxidant additives which hinder fuel conversion slightly.
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As volatile matter is driven from the coal matrix with increasing rank, the relative carbon percentage tends to increase. Both volatile matter and fixed carbon are used to define coal rank in highvolatile, mediumvolatile bituminous, and higherrank coals in the classification system (ASTM method D38812; American Society for Testing and ...
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Figure 1. Grease manufacturing is an art that continues to evolve as enduser needs develop and the market refines its requirements. Courtesy of STLE. In addition, Evan Zabawski, senior technical advisor at TestOil, headquartered in Strongsville, Ohio, noted that rheology is the science of deformation and flow of materials.
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Pitch as a matrix precursor usually requires a modification of the raw pitch to have a high coke yield while maintaining good fluidity. Several methods have been used to modify petroleum or coaltar pitch (CTP): the treatment of pitch with sulfur as an additive [1], [7], mild oxidation by air blowing [8], [9], [10], and nitrogen blowing [11].
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operating costs and, at the same time, increase productivity. One way to achieve this is through the injection of pulverised coal directly into the BF. Pulverised coal injection (PCI) provides important economic and operational benefits. These include: lower consumption of expensive coking coals. Replacing
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The two castings produced with 2% binder showed more pearlite in the surface layer, indicating surface carburization. Experiments were conducted to compare red and black iron oxide to six other materials and engineered sand additives (Fig. 2) at two different levels. RIO: Red iron oxide or hematite (Fe2O3) with a fine powder.
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Hence, the CE of the coal increases. However, the influence of O2 enrichment on CE is limited. It has been shown through calculation that the CE increases by around % for a HV coal ( % VM) and % for a LV coal (14 % VM) when O2 enrichment of the hot air blast is raised from 0 % to 6 % by volume.
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Coal dust, or anthracite, is fast becoming a common additive in the green sand moulding process. It is a carbonaceous additive that under foundry conditions combusts and oxidises. Historically, the leading additive in green sand casting, as a carbonaceous material, was highly volatile bituminous coal, often referred to as sea coal.
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Compared with no additive condition, NO removal efficiencies with Na 2 CO 3, KCl and NaCl are increased by, and percentage points at 950 °C respectively, and Na 2 CO 3 additive even results in an increase of NO reduction by up to percentage points at 850 °C, which suggests that the catalytic ability of the three additives ...
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Purpose of Review This review presents an overview of highperformance ultrafiltration (UF) membranes, including fouling resistant, micellarenhanced, tight, adsorptive, and catalytic UF. The review discusses recent advances in the development of these membranes, focusing on their preparation method, performances, and applications. Then, the review concludes with a discussion of the challenges ...
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For the rest of additives, which act reducing fluidity, it should be also taken into account that coalbased carbon s can also be prepared from lowfluidity coals (<20 ddpm) [13,21].
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Additives that can help: Friction Modifiers PCMO: 5565% frictional losses in II ... VM Concentrate 40,000 Molasses 8,000 Maple syrup 3,000 Motor oil (SAE 8 SAE 40 grades) 25 350 ... • Viscosity Modifiers increase viscosity proportionally to the volume that
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The recent changes in anthropogenic clean coal technologies limiting fine particles and NO X emissions have led to a dramatic increase in nucleation mode PN between 5 nm and 15 nm.
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Densification and pyrolysis are two methods to upgrade biomass. To avoid ash fusion problems, NH4H2PO4 and Ca(H2PO4)2 were chosen as additives to mix with maize straw to produce biochar briquettes. Potassium transformation mechanisms between additives and biomass in pyrolysis were investigated by XRD, XRF, SEMEDS, and simulation. Results show that additives accelerate the production of ...
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Cylindershaped fuel pellets that were 3 mm in diameter and 3 mm in height, with a mass of 20 mg, were produced by compressing dry coal processing waste under the pressure of 5 MPa. The first group of pellets from coal dust with a particle size less than 140 µm did not contain any additives. The pellets of the second group of fuel compositions contained an oilimpregnated porous polymer ...
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High VM content of coal is a reason for the accelerated temperature increase inside boiler. Slagging and fouling potential of the ashes of these 3 pattern coal are obtained with different indexes.
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Ignition temperature of coal and other dust is not affected by particle size. A big difference is made by the way coal dust comes in contact with a heat source. Thus, layered powder of coal can ignite at a much lower temperature (160°C approx.), whereas a cloud of coal dust will need 450650°C to ignite. Table shows some relevant data [5].
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Biofuels are playing an increasingly important role since they are an attractive alternative to fossil fuels, access to which has been limited. Moreover, they can help the European Union countries meet their climate and energy objectives. There is a growing interest in the production of biofuels from the organic fraction of municipal solid wastes as secondgeneration biofuels. Such a solution ...
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This patent describes a process for treatment of brown coal which comprises subjecting the coal to shearing forces to produce a plastic mass which is capable of conversion by subsequent compaction and drying into a fuel of increase density and enhanced calorific value, characterised in that the water content of the coal is more than 54% and the ...
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To prepare the raw material for pelletization, some additives such as binder, limestone, coke/anthracite coal is used to form high grade iron pellets, which enhance the needed physical and chemical properties of pellet to process further. Binder plays the vital role to hold fines together and this can be agglomerated into pellet with high strength.
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The researchers believe that the use of saltbased additives for increasing the efficiency of coalburning could help improve fuel efficiency in energy production, minimize energy use for ...
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Effect of coal nature on the gasification process. Mustafa Ozer, ... Badie Morsi, in Integrated Gasification Combined Cycle (IGCC) Technologies, 2017. Ash fusion temperature (melting temperature). AFT is an indicator of the ash melting behavior in the gasification process (Li, 2010).For the gasification of lowrank coals, such as lignite and brown coal, in fixed and fluidized beds ...
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Pure copper is defined as having a minimum copper content of % [ 1 ]. While pure copper is used extensively for electrical components, such as cables and contacts, alloys like brass or bronze are used for thermal energy transfer applications, such as radiators and heat exchangers [ 2 ]. While the laserbased additive manufacturing of ...
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Petroleum coke, which is a potential replacement for coking coals in the production of metallurgical coke, has received the name of a petroleum coking additive in Russia and the CIS countries.
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يرغب أحد موردي المواد من بلجيكا في إنتاج مسحوق الحجر الجيري لملابسه...
الهند غنية بالموارد المعدنية المختلفة وهي سوق مهم لمعالجة المعادن
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