sulfur coal pyritic

sulfur coal pyritic

Jaw Crusher

As a classic primary crusher with stable performances, Jaw Crusher is widely used to crush metallic and non-metallic ores as well as building aggregates or to make artificial sand.

Input Size: 0-1020mm
Capacity: 45-800TPH

Materials:
Granite, marble, basalt, limestone, quartz, pebble, copper ore, iron ore

Application:
Jaw crusher is widely used in various materials processing of mining &construction industries, such as it is suit for crushing granite, marble, basalt, limestone, quartz, cobble, iron ore, copper ore, and some other mineral &rocks.

Features:
1. Simple structure, easy maintenance;
2. Stable performance, high capacity;
3. Even final particles and high crushing ratio;
4. Adopt advanced manufacturing technique and high-end materials;

Technical Specs

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Standard Test Method for Forms of Sulfur in Coal

1.1 This test method applies to the determination of sulfate sulfur and pyritic sulfur in coal and calculates organic sulfur by difference. This test method is not applicable to coke or other carbonaceous materials. Monosulfides (pyrites and FeS2 are disulfides) of iron and elements such as cadmium, lead, vanadium, and zinc can be present in coal.

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Effect of Pretreatment on Pyritic Sulphur Reduction from Coal

Effect of Pretreatment on Pyritic Sulphur Reduction from Coal A. Malik1, M.G. Dastidar2*, P.K. Roychoudhury3 1 Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University, Utsunomiya, Tochigi 321 8585, Japan 2 Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi 110 016, India

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The study of Thiobacillus ferrooxidans on desulfurization

The high sulfur coal from Shanxi total sulfur content of 2.76%, in which pyritic sulfur content of 2.58% and sulfate sulfur content of 0.08% and organic sulfur content of 0.10%. In this paper, the Thiobacillus ferrooxidans separated by National Engineering Laboratory of Biohydrometallurgy was used to remove sulfur in the coal. The desulfurization rate under different grinding grain, pulp density and inoculation .

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Coal, Kentucky Geological Survey, University of Kentucky

Understanding the forms of sulfur in a coal is important because coal preparation can reduce the inorganic (pyritic and sulfate) sulfur in coal, but not the organically bound sulfur in coal. Sulfur is distributed in several different forms and scales in coal.

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Coal and clean coal tech. -ill-sec

All types of coal cleaning are often call coal beneficiation. Coal beneficiation has centered on two areas physical and chemical. Now, there is a third area biological. Physical cleaning separates undesirable substances, such as dirt, rocks and inorganic, or "pyritic" sulfur (sulfur combined with iron), from the coal. Often this is done

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Pyritic Definition of Pyritic at Dictionary

Pyritic definition, a very common brass-yellow mineral, iron disulfide, FeS2, with a metallic luster, burned to sulfur dioxide in the manufacture of sulfuric acid: chemically similar to marcasite, but crystallizing in the isometric system.

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US3768988A Removal of pyritic sulfur from coal using

Claims (18) 2. A process for reducing the pyritic sulfur content of coal which comprises reacting the coal with an effective amount of an aqueous solution containing Fe 3 ion selected from the class consisting of FeCl3 and ferric sulfate, and removing from the coal sulfur formed by the pyrite reaction.

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STUDY OF SULFUR BEHAVIOR AND REMOVAL DURING .

mining the forms of sulfur in coal may not be reliable when applied to chars. In this project, we used naturally occurring differences in stable sulfur isotope compositions of pyritic and or- ganic sulfur in coals to monitor the mobility of these two major forms of sulfur during thermal desulfurization treatment.

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Removal of pyritic sulfur from coal TRW INC.

Dec 16, 1975· While it is possible to remove pyritic sulfur from coal by froth flotation or washing processes, the selectivity is poor; hence, a large portion of the coal is discarded along with ash and pyrite. Consequently, the solution so far has been to simply burn coal having a low sulfur content.

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Comparison of oxidation and reduction methods in the

con6c- environmentalgeologynotes december1973 •number66 'lls ge ^ comparisonofoxidationand reductionmethodsin thedeterminationof formsofsulfurincoal j.k.kuhn,l.b

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Coal and clean coal tech. -ill-sec

This allows for up to 90 percent of the pyritic sulfur to be removed. Column flotation is a cleaning method that floats finely ground coal in water. The coal has been chemically conditioned to stick to rising air bubbles. This allows nearly all inorganic matter, such as pyritic sulfur, to sink to the bottom of the flotation column.

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(PDF) The removal of pyritic sulphur from a coal by ozone

The analytical data indicate that the Mexican coals usually have a low or moderate sulfur content, l.3–2.5wt%. The pyritic sulfur accounts for 38 to 77% of the total sulfur content, depending on

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Coal research aimed at No. 1 enemy: sulfur

In work with Illinois No. 6 coal the group has found that the aggregate flotation method can remove about 84 percent of the pyritic sulfur and retain 92 percent of the coal's heating value. Among other materials the researchers are investigating are fines from the waste stream of a southern Illinois mine.

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An Evaluation of Coal Cleaning Processes and Techniques

Total sulfur and pyritic sulfur reductions were again utilized to measure the degree of success. The concentrating table, the concentrating spiral, and the compound water cyclone were the three commercially available units tested in Phase II. Phase III of the program, utilizing the coal samples supplied by CTECO,...

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1.1 Bituminous And Subbituminous Coal Combustion

from coal combustion are primarily sulfur dioxide (SO 2), with a much lower quantity of sulfur trioxide (SO 3) and gaseous sulfates. These compounds form as the organic and pyritic sulfur in the coal are oxidized during the combustion process. On average, about 95 percent of the sulfur present in bituminous coal will be emitted as gaseous SO x

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Coal Sulfur Measurements EPA

Pyritic sulfur is extracted from coal by the oxidative attack of boiling dilute nitric acid. Because varying amounts of organic sulfur are also extracted, pyritic sulfur is quantified by the determination of pyritic iron. Therefore, removal of non-pyritic iron is necessary either directly or as a blank with HC1.

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(PDF) Separation of Pyritic Sulfur from Egyptian Coal

The most common forms of sulfur in coal are organic and inorganic (pyritic) sulfur (He et al., 2012). Sulfur in coal is derived generally from the original plant materials and ambient fluids in

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Biological removal of pyritic sulfur from coal by the

than 90% of initial pyritic sulfur was removed from bituminous coal samples (containing 2.1% pyritic sulfur) using the thermophilic organism Sulfolobus acidocaldarius. Microbial desulfurization rate was improved nearly ten fold by adjusting the N/P and N/Mg ratios in the nutrient medium.

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(PDF) The removal of pyritic sulphur from a coal by ozone

PDF The removal of pyritic sulphur from a Mexican sub-bituminous coal in different solutions was investigated. The effects of type and concentration of reagents used and the presence of ozone as

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Effects of pyrite on the spontaneous combustion of coal

Sep 28, 2015· As for the impact of sulfur or pyrite on the spontaneous combustion of coal, Shao (1981) pointed that 3 % content of pyrite in coal inhibited positive effects on coal spontaneous combustion in situ where the moisture of coal is proper. Based on the experimental results, Singer et al.

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Cleaning of high pyritic sulfur fine coal via flotation

Pyritic sulfur rejection is comes first to determine the contribution of any coal cleaning process to environmentally friendly energy generation. In this study, a coal sample with considerably high pyritic and sulfate sulfur content was used.

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Chemical Removal of Pyritic Sulfur from Coal Advances in

The effect of variables, such as coal particle size, acid and iron concentration, reaction time, and temperature are discussed. The results show that near complete removal of pyritic sulfur can be obtained under mild conditions, resulting in a reduction of the total sulfur content of the coals from 40 to 80%, depending on the original pyritic sulfur content.

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10 Some Methods of Reducing Sulfur Oxides from Power

Summary. The percentage of sulfur that occurs in coal, as pyrite, varies from about 20 to 80 percent of the total sulfur. For U.S. coals with a low sulfur content most of the sulfur is in the organic form while for high sulfur content coals most of the sulfur occurs in one or more of the pyrite forms.

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Sulfur in coal and its environmental impact from Yanzhou

Sulfur is one of the hazardous elements in coal. The concentrations of sulfur are relatively high in coal. The major forms of sulfur in coal are pyritic, organic and sulfate. Pyritic and organic sulfur generally account for the bulk of sulfur in coal. Elemental sulfur also occurs in .

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Method of removing sulfur and other contaminants from the

An improved method is disclosed of removing pyritic sulfur and other contaminants from the coil in a coal-oil slurry. In such a slurry, raw pulverized coal is suspended in fuel oil.

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US3926575A Removal of pyritic sulfur from coal Google

Most of the free sulfur is volatized from the coal due to the heat drying; additional free sulfur can be removed by additional washing and heat drying and/or solvent extraction techniques. If desired, the ferrous chloride can be oxidized to ferric oxide and hydrochloric acid.

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COAL CHARACTERISTICS

Indiana Center for Coal Technology Research 12 SULFUR IN COAL Although coal is primarily a mixture of carbon (black) & hydrogen (red) atoms, sulfur atoms (yellow) are also trapped in coal, primarily in two forms. In one form, (1) the sulfur is a separate particle often linked with iron (green, pyritic sulfur) with no connection to the carbon atoms, as in

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Sulfur removal by fine coal cleaning processes ScienceDirect

Keywords. A novel design of water-only cyclone has been shown to be as efficient as mechanically more complex commercially available centrifugal gravity concentrators for pyritic sulfur removal from coal. Any crushing, separation and ultimate dewatering will significantly increase the cost of coal preparation.

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8.8. Sulfur Oxides (SOx) Emissions From Coal netl.doe.gov

Sulfur Oxides (SOx) Emissions From Coal Fossil fuels such as coal contain sulfur in two inorganic forms, pyritic sulfur (FeS 2 ) and sulfates (Na 2 SO 4, CaSO 4, FeSO 4 ), and organic forms such as sulfides, mercaptans, bisulfides, etc. Typically coal contains anywhere from 0.2 to 5 percent sulfur by dry weight.

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SULPHUR PROFILE IN COAL MSK

Apr 03, 2018· SULPHUR PROFILE IN COAL. The primary forms of sulfur in coal are pyritic sulfur (FeS 2 ), sulfate sulfur (CaSO 4. 2H 2 O, FeSO 4. 7H 2 O) and organic sulfur (mercaptan, the others, disulfide and aromatic systems containing thiophene rings).Of the two predominant forms, pyrite and organic, the former is easier to remove by physical...

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