01 Solid fimls (preparation)

95104437 Proximate analysis of New Zealand snd Australian 95104447 coals by thermogravlmetry

ZG45Sl2Mn2MoVRE steel used In cast cutter picks for coal cutters

Beamish, B. B. N.Z. J. GeoL Geophys., 1994, 37, (4). 387-392. Describes a technique which has been developed at the University of Auckland for ple weights o P

roximate analysis of coals by therm0 ravimetry using sam- #e ~20 mg. Samples from three New aland coalfields and

the Bowen Basin of Queensland, Australia, have been analyzed. Coals tested ran e in rank from subbituminous to semianthracite, and have ash contents rom 3.1 lo 21.4% on a dry basis. Results obtained using the ! technique are within acceptable precision limits of the standard procedure.

Lin, X. er al., JLcie Gongcheng Cailioq 1994.18, (4), 44-46. (In Chinese) Describes the design of a low-alloy high strength cast-steel ZG45Si2Mn2MoVRE.

Preparation

95104438 Selective electrochemical oxldatlon of coal In aqueous alkaline electrolyte Soonho, A. et al., J. Electrochem. Sot., 1995. 142, (3), 782-787. The selective electrochemical oxidation of coal at room temperature in an alkaline slu

7 at 1.0 V showed little or no oxygen production. Electrode

activities an selectivities toward coal oxidation and oxygen evolution were determined by monitoring and analyzing anodic and cathodic gas products. The activities of Pt and various NI (electrode) surfaces were compared.

Slberlan sapropellc coal: A unique type of worka-

95104448 Adaptive control system for the process of drying of coal concentrate Ulyshin, V. A. and Zotov, V. A. Russian)

Koks Khim., 1994, (10). 32-34. (In

95104449 The agglomeration of brown coal Naundorf, W. German)

Braunkohle BergbuutecA, 1994, 46, (12), U-28. (In

Describes the granulation of lignite with mixers and pelletization with extrusion-type roll presses as an alternative lo brown coal briquetting. Hard pellets and granules with favourable properties were produced by pretreat- ment and agglomeration of the raw lignite and a subsequent drying.

&&ev, S. J. GemmoL, 1995, 24. (5). 349-353. Discusses the composition and workable properteis of sapropelic coal from Eastern Siberia and referred lo as ‘jet’. In the 193Os, for about ten years, a jet industry existed in the USSR aimed at the production of consumer and industrial goods from Siberian sapropelic coal. Interest in certain types of jet for the manufacture of artifacts has now reawakened.

95104440 Study of petrographic structure of coal compo- nents and their p)irldlnie extrictlon products Machnikowska. H. and Jasienko. S. Karbo-Enernochern-EkoL 1994.39. (6), 131-132. (in Polish) . Describes an .mvestigatlon into the structure of vitrinite and exinite from &i-! gas-wkmg and coking coals and their pyridine extraction products.

Itmutes have more aromatic and pyridine soluble matter than exinites.

95104441 Study on chemical stablllty of organic sulfur In coal and Its structure Hu, X. D. et al, Fuel Sci Technol. Inr., 1995. 13, (2), !61-177. The tiona f

aper describes the ItIes for two high-su P

rcsencc and reactions of organic sulphur func-

of China. phur coals from the Yanzhou and Donglin mines

~fl~;OU;O Automatic productlon line for honeycomb brlquets

Shari,, Z. (Assigned to) Yidu Iron Works, Faming Zhuanli Shenqing Gongkai Shuomingshu CN.l,082,593, Feb. 1994. The automatic production line consists of a control system, feeders, mixers, conveyers, presses, unloading gates and feeding and conveying belts. A controller is used in the central console to control the line.

95104451 Beneflclatlon of coal-heavy oil coprocesslng resl- due bv Oil-DhaSe aaalomeratlon Majid,x ei aL, FucL-Jul. 1995, 74, (7)! 1036-1041. Surface characterization techni ues (scanmng electron microscopy, and X- ray photoelectron spectroscopy were used to examine toluene-insoluble 1 s&s from coproc&ng of &I and heavy oil in order to evaluate their physical separation potential. Washability studies, using float-sink tests, were also carried out to provide an empirical estimate of the ash separation attainable. On the basis of the results, agglomeration tesb were performed io an attempt to optimize the beneficiahon of the organic matter in the residue pitch. Ash rejection in these. tests ranged from 30 to 40%. Analysis of the ash from the a@omeration and reject fractions suggested that most of the irons was retamed in the agglomerates.

95104442 Sub-models. 2. Coal characterlzatlon Van Engelen, A. B. and Van der Honing, G. Coal ScL TechnoL, 1995,22, 277-290. A series of 14 coals are characterized regarding char and volatiles. An analysis model describing conversion of porous particles was used to inter- pret results of char combustion experiments in a small scale fluidized bed reactor.

95104452 Cake unlformlty In pressure flltratlon of coal slurry Sung, D. J. ef aL, Filtr. Se ., 1994, 31, (8). 819-824. Describes a novel approach or producing a uniform structure filter cake in P pressure filtration.

95104453 Chemical coal desulfurlzatlon research In Turkey Yaman, S. et aL, Fuel Sci TechnoL Int, 1995, 13, (1). 4958. The paDcr discusses chemical desulphurization of lignitea.

95/04443 Sulfide formatlon In reglon of recent peat accumu- latlon In the Rlon In peat bogs of t ):

lntermontane trough. 2. Dlstrlbutlon of pyrlte e Kolkhlda Ilttoral-contlnental belt

Tiiofeev, P. P. et aL, LitoL Polezn. Mop., 1994, (2). 3-16. (In Russian) The content, mode of occurrence. and distribution were studied of Fe in peat deposits localized in bottom clays contrast-facies sediments of the Riony intermontane basin, Russia.

_ _ 95104454 Chemical desulfurlzatlon of coal Gao, Z. et aL, Huanjing Huaxue, 1994, 13, (a), 486-491. (In Chinese) The pyro P

aper describes the effects of FeXSO,), solution, NaOH solution, and ysis on desulphurization of three types of Chinese coals, i.e. Yanzhou,

Donglin and Nantong.

95lQ4444 Temperature-coallflcatlon aspects on gas dlstrlbu- tlon In the deposlt of the Upper Slleslan Coal Basln Tarnowski, J. and Zawierucha, M. Polish)

PrzegL Gem., 1994.50. (7), 17-24. (In

Reports that the study of 480 drill cores has led to a conclusion that maxi- mum number of occurrences of methane gas was related to the range of temperatures from 35 to 45’C and volatilti wntents from 30 to 35s(dry ash-free basis). Depth zones corresponding to these wnditions overlapped in more than 90% of cases.

95104455 Coal pulverlsers - Performance and safety Scott, D. IE4CRJ79, IEA Coal Research, Gemini House, lo-18 Putney Hill, London SW15 6A.4, UOO.00, June 1995. The qort includes an assessment of the safety implications which may arise from the different propensities of different coals to self ignite and to form explosive mixtures.

95104456 Current actlvltles of clean coal technology of Japan Okamoto, H. Sekitan Riyo Ggutsu Kaigi Koenshy 1994. 1-6. (In Jauanesej Abiscus&on is given on coal cleaning in Japan, including technologies and operation. 95104445 Trace elements In fossll dopplerlte

Admakin, L. A DokL Akad Nauk, 1994.337, (3). 352-354. (In Russian) Discusses the pressure of trace el&ment.~in do~ph&te coal niatter, espe: cially in gelocollinite, which is a primary indicator of their association with 95104457 Develo mental status of BHEL’s hl h tern erature the organic matter of coal. $ B Ii high pressure (HT; $clrculatlng bed granular f lter (C OF)

f;r ~“1” R. 3. .s

., Hear Recovery Sysr. CHP., 1995, 15. (2).

Varlatlon of methane ??voluUon from coal walls of a

Roszkowski, J. d aL, Gornictwo, 1994, 18. (3), 187-193. (In Polish) Reports on experimental results which confirm the validity of the assump-

The pa a

& discusses granular bed filtration which is one of the processes under

lion that at the particular moment in time, the rate of methane evolution from coal drift walls is inversely proportional to the square root of the time elapsed since wall exposure.

evelopment for separation of fine dust at relatively high tcmpera- lures and pressures, for application in coal based combined cycle power lants.

P Bharat Heavy Electncals Ltd, Hyderabad, India have installed a test

acility to evaluate the performance of a circulating bed granular filter. Gives details of the test facility and some of the important test results on the performance of the filter and the online granule circulation system.

324 Fuel snd Energy Abstracts September 1995