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We هي شركة ذات تقنية عالية تدمج البحث والتطوير والإنتاج والتوزيع ، وتوفر كسارة ، وصنع الرمال ، ومعدات طحن ، ومحطة تكسير متنقلة ، إلخ.
We هي شركة ذات تقنية عالية تدمج البحث والتطوير والإنتاج والتوزيع ، وتوفر كسارة ، وصنع الرمال ، ومعدات طحن ، ومحطة تكسير متنقلة ، إلخ.
2024/8/30 It provides a new method for mining unrecoverable coal and deep coal resources, while serving as a feasible plan to coal clean utilization. However, it should be احصل على السعر
2024/2/1 Coal is and will be an important primary energy source in China for a long time [1], [2], [3], [4].With the progressive deepening of mining operations, the ground temperature of احصل على السعر
2024/10/28 Graphite made from coal will not only widen the graphite mineral resource, but also significantly improve the value of coal utilization. In this study, anthracite coal was heated احصل على السعر
Year. Cumulated performance data: Position December 20, 1997. Operating hours 67,006 gasifier h Lignite feed1.6 MT of dried lignite Synthesis gas2,131 output Mm3 Methanol production احصل على السعر
2023/5/1 The metallic elements in high-temperature coal tar pitch (HCTP) will affect the properties of carbon materials produced from the HCTP. The study on the metallic elements in HCTP is essential for the quality improvement of احصل على السعر
High-temperature coal tars (CAS # 65996-89-6) is defined in EC (1976) as ‘the condensation product obtained by cooling, to approximately ambient temperature, of the gas evolved in the احصل على السعر
2022/2/18 The relationship between each index and temperature at 200–300°C is opposite to that at 50–200°C, and the overall change slope is larger. Moreover, when the oxidation احصل على السعر
2021/5/15 Zhang et al. use the downer reactor to investigate the effect of residence time on the fast pyrolysis of Shenmu bituminous coal and Inner Mongolia brown coal at 610 °C. احصل على السعر
2019/3/12 In order to investigate the spontaneous combustion characteristics of weathered coal, gas generation and thermal behavior of weathered and fresh coal were analyzed. A self احصل على السعر
IEA Clean Coal Centre – High temperature steels in pulverised coal technology 7 5.4 COST 558 49 5.5 Dong Energy 50 5.6 Schaeffler 50 5.7 51 5.8 Computerised maintenance management system 52 6 Raising the steel barrier to 650°C 53 6.1 KOMET 650 54 6.1.1 Investigations of the operational behaviour of boiler materials and their welded ...احصل على السعر
2024/8/15 To investigate the extinguishing effect of low-temperature gaseous CO 2 on coal spontaneous combustion, a similar simulation experiment was designed and conducted to test its migration and cooling characteristics in high-temperature loose coal. During the injection of low-temperature gaseous CO 2, the temperature along the central axis of the release port احصل على السعر
2024/1/25 Thus, the high-temperature coal tar pitch with the PQI content of 7%–13% was the preferably raw materials to produce high-quality MCMB by thermal-polymerization method. CONFLICT OF INTEREST STATEMENT. The authors declare that there is no conflict of interest regarding the publication of this paper.احصل على السعر
1983/1/1 Under such high fluxes, coal temperatures in excess of 1800 are indicated by both measurements and calculations. These temperatures are far above the nominal 1000 maximum temperature ordinarily assumed to be sufficient for complete coal pyrolysis. The average devolatilization of 51 per cent also far exceeds the 37 per cent ASTM volatility that ...احصل على السعر
2021/5/15 High temperature coal tar has more than 10,000 kinds of compounds and more than 400 matters have already been verified. Among the 400 matters, there are 63 acidic compounds, 113 basic compounds and 174 neutral compounds [39]. The heterocyclic aromatics can be divided into three types according to the heteroatoms, which mainly oxygen-containing ...احصل على السعر
2024/6/1 The study examined the oxidative pyrolysis of raw and residual coals extracted with tetrahydrofuran, as well as the CO/CO 2 /H 2 /CH 4 emissions at high temperatures (200∼900 °C). Tetrahydrofuran was found to extract aromatic and aliphatic hydrocarbons from lower metamorphic coal, as well as hydroxyl, increasing the specific surface area of char احصل على السعر
High Temperature Winkler (HTW) Coal Gasification A Fully Developed Process For Methanol and Electricity Production W. Renzenbrink, R. Wischnewski, J. Engelhard, A. Mittelstädt, Rheinbraun AG 1 Introduction In the mid -70s, Rheinbraun embarked on the development of the H igh T emperature W inklerاحصل على السعر
2023/5/5 1. Introduction. HCTP is the residue of coal tar distillation, which is a byproduct of metallurgical coke production, accounting for about 50–60% of the total coal tar. 1 The chemical composition and structure of HCTP are very complex. It is mainly composed of more than 5000 kinds of polycyclic aromatic compounds with more than three rings and a small amount of high احصل على السعر
2023/12/1 High-temperature rapid heating technology of coal gas is a crucial issue that urgently needs to be addressed for the recycling of coal gas in the iron manufacturing. Drawing upon circulating fluidized bed principles, this study proposed a high-temperature rapid heating technology of coal gas with employing thermal carrier particles.احصل على السعر
Humic acids (HAs) are widely used as filtrate and viscosity reducers in drilling fluids. However, their practical utility is limited due to poor stability in salt resistance and high-temperature resistance. High-temperature coal pitch (CP) is a by-product from coal pyrolysis above 650 ℃. The substance's molecular structure is characterized by a dense arrangement of aromatic احصل على السعر
2022/7/24 Mesocarbon microbeads (MCMBs) are a kind of engineering and functional artificial carbon materials generally prepared by the polymerization of polycyclic aromatic hydrocarbons. The physicochemical property of the raw materials plays a key role in the quality of MCMBs. For a detailed analysis of the synergistic effects of the generation of MCMBs, a high احصل على السعر
2019/10/26 Coal and gas outburst is one of the main gas hazards in coal mines, the increases in mining depth and strength in China have changed many low gassy mines to high gassy or even gas outburst mines (Ni et al. 2019a; Xie et al. 2019a; Wang et al. 2013), and safety situation is not ideal (Liu et al. 2011; Ni et al. 2019b).At the microcosmic point, coal and gas احصل على السعر
During ammonia-coal co-firing, air-staged combustion techniques are commonly used to reduce NO x emissions, as illustrated in Fig. 1.In this scenario, a significant amount of NH 3 accumulates in the reduction zone for NO reduction, especially near the wall, where it forms an NH 3-dominated reducing atmosphere.This condition may cause high-temperature corrosion of the احصل على السعر
2024/10/28 Graphite made from coal will not only widen the graphite mineral resource, but also significantly improve the value of coal utilization. In this study, anthracite coal was heated in the temperature range of 500 to 2900 °C to study the size increase of nanometric graphite crystallites from anthracite to real graphite. The carbon content rapidly increases to 99.2% احصل على السعر
2022/7/24 Mesocarbon microbeads (MCMBs) are a kind of engineering and functional artificial carbon materials generally prepared by the polymerization of polycyclic aromatic hydrocarbons. The physicochemical property of the raw احصل على السعر
2019/10/26 Coal and gas outburst is one of the main gas hazards in coal mines, the increases in mining depth and strength in China have changed many low gassy mines to high gassy or even gas outburst mines (Ni et al. 2019a; Xie et al. 2019a; Wang et al. 2013), and safety situation is not ideal (Liu et al. 2011; Ni et al. 2019b).At the microcosmic point, coal and gas احصل على السعر
During ammonia-coal co-firing, air-staged combustion techniques are commonly used to reduce NO x emissions, as illustrated in Fig. 1.In this scenario, a significant amount of NH 3 accumulates in the reduction zone for NO reduction, especially near the wall, where it forms an NH 3-dominated reducing atmosphere.This condition may cause high-temperature corrosion of the احصل على السعر
2024/10/28 Graphite made from coal will not only widen the graphite mineral resource, but also significantly improve the value of coal utilization. In this study, anthracite coal was heated in the temperature range of 500 to 2900 °C to study the size increase of nanometric graphite crystallites from anthracite to real graphite. The carbon content rapidly increases to 99.2% احصل على السعر
2023/1/1 Coal-based needle coke uses low temperature coal tar, medium and low temperature coal tar, high temperature coal tar, coal tar pitch, etc. as raw materials [6], [7], [8]. Among them, low temperature coal tar and medium-low temperature coal tar contain aromatic components, low quinoline insoluble (QI) content, but high oxygen content [9], [10].احصل على السعر
The temperatures attained in natural combustion of coal, while high for surface geologic processes, are not particularly high compared to those in industrial combustion of coal. A typical combustion temperature in pulverized coal electrical power plants is احصل على السعر
2021/9/15 1. Introduction. High-temperature coal tar (HTCT) contains numerous value-added chemicals, such as condensed arenes (CAs) [1], [2] and heteroatom-containing aromatics (HACAs) [3], [4].However, the heavy components, such as colloid and asphaltene [5], [6], in HTCT have always hindered the high-value utilization of HTCT.Petroleum ether-extractable portion احصل على السعر
2009/2/1 The annual output of coal tar in China is 6–8 million tons in 2006, accounting for 1/3 of the coal tar annual output in the world [1]. In addition, the proportion of high-temperature coal tar is over 80%. As a substitute to petroleum, coal tar is expected to be used as liquid fuel or chemical feedstock.احصل على السعر
2022/2/18 The high-temperature thermal shock caused by the spontaneous combustion of coal incurs thermal damage on adjacent coal, which, in turn, causes changes in the mechanical properties of the coal. However, only a few studies have been conducted in this context, which has limited our understanding of the thermal damage characteristics of coal bodies ...احصل على السعر
2024/10/1 High-temperature carbonization synthesis of coal fly ash/chitosan-carbon composite electrodes for enhanced uranium electroadsorption. ... Coal fly ash (CFA), a primary solid waste generated from coal-fired power plants since the 1920s, has caused significant soil and water pollution [32].احصل على السعر
In order to investigate the pore size distribution of high-temperature coal under different cooling conditions, magnetic resonance imaging (MRI) was used to measure the porosity of coal specimens at various temperatures for each cooling method. The MRI analyzer used in this study was the MocroMR12–150V-I from Suzhou Niumai Analytical ...احصل على السعر
2022/2/15 The basic properties of high-temperature coal tar pitch were listed in Table 3. HCTP possessed a high carbon elemental content of 90.57 wt% with a high softening point of 344 °C. In addition, the H ar content of HCTP was as high as 81 wt% and the relative contents of other hydrogen types were low. In summary, HCTP was a heavy aromatic raw ...احصل على السعر
2021/6/1 High temperature pyrolysis had a high content of syngas (H 2 +CO), which can be utilized as raw material in synthetic chemical industry. There were high content of toluene in low temperature coal tar. There were more polycyclic aromatic hydrocarbons and less aliphatic chain hydrocarbons in high temperature coal tar.احصل على السعر
2015/10/1 A high-temperature coal tar (HTCT) was extracted by petroleum ether (PE) and the extract (denoted by PE-HTCT) was characterized using three mass spectrometers to obtain and compare molecular compositional information. Gas chromatography/mass spectrometry detected molecules with low molecular weight and polarity such as hydrocarbons.احصل على السعر
