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·The objective of the project entitled "Utilization of Lightweight Materials Made from Coal Gasification Slags" was to demonstrate the technical and economic viability of manufacturing low unit weight products from coal gasification slags which can be used as substitutes for conventional lightweight and ultra lightweight aggregates
·The slag produced during the plasma gasification can be used as a construction material if required Coal gasification process has recently been preferred over conventional combustion practices to be a popular practice due to the reduced environmental impact and increased process efficiency for hydrogen production Searching the
·The coal and the carbide slag samples were crushed by a jaw crusher and grounded by a ball mill These samples were selected with a particle size of mm and dried at 105 °C in a constant temperature oven for 4 h To explore the calcium containing active components in the coal gasification process XRD was used to observe the
·In order to improve the comprehensive utilization of the waste slag and wastewater produced by the coal chemical industry the cementitious material was prepared with coal gasification slag as raw material and high salt wastewater water glass and lime as composite activator The activated effects of lime content sodium silicate modulus sodium silicate
Our company s main products are coal chemical ash slag treatment system ash slag secondary dehydration device system Company Profile Qingdao Zdz Electric Power Environmental Protection Equipment Co Ltd located in Guangdong Road Beiguan
6 ·Helps the economic competitiveness of coal in general and integrated gasification combined cycle IGCC processes in particular The interest in using slag is largely driven by the avoided landfill cost 1 Avoided landfill costs can be significantly different for utilities with and without captive landfills
·The intrinsic mechanism and impact process of how coal gasification coarse slag CGCS amends the physicochemical properties of a specific soil based on its properties are not yet clear The study explored the properties of CGCS that can be used for soil amendment by evaluating the properties of topsoil and CGCS Different CGCS additions 0% 5% 10% 15%
·With the rapid development of coal chemical industries the production of solid waste gasification slag is increasing year by year How to efficiently utilize gasification slag has become an urgent problem to be solved In this paper residual carbon RC obtained from coal gasification fine slag was activated by KOH wet method under different temperatures The
·The coal gasification slag is modified and prepared as coal mine filling material to meet the relevant technical requirements which can realize the recycling of coal mine → coal chemical industry → coal mine In this paper in order to explore the evolution law of the mechanical properties and pore structure characteristics of the modified
·Coal gasification coarse slag CGCS is a byproduct of the biochemical reaction of coal under high temperatures and high pressure to produce alcohols ethers and other crude syngas [8] The emission load of coal gasification slag CGS in China exceeded 70 million tons in 2021 and the utilization rate was less than 50%
·Coal gasification technology has become an important part in China s energy strategy However a great amount of slag has been generated due to this technology which requires urgent development of resource utilization technology to consume and reuse the slag largely Considering that different mineral phases of coal ash content will change with the
·Gasification slag GS is rich in SiO2 Al2O3 and Fe2O3 and has excellent particle size gradation which has the potential to be employed as an aggregate in the field of controlled low strength material CLSM Nevertheless the large scale application of GS as the fine aggregate for the preparation of CLSM has been scarcely investigated In the present
·It was beneficial and necessary to obtain the characteristic of the coal gasification in molten slag to enhance the waste heat recovery efficiency and gasification reaction In the present work a simplified physical model based on the experimental installation was established to investigate the characteristic of the coal gasification in molten
·Coal gasification fine slag CGFS which is the by product of entrained flow coal gasification has superior properties such as a large surface area a broad pore size distribution and a high content of carbon This material has the potential to amend poor soils This study was carried out to investigate the use of CGFS as a soil amendment for alkaline sandy lands
1 ·Slag and Ash As discussed in the Background solid waste from conventional pulverized coal fired power plants is a significant environmental issue due to the large quantities produced chiefly of coal fly ash and the potential for leaching of toxic substances heavy metals such as lead and arsenic into the soil and groundwater at disposal sites and accidental releases
·Coal gasification fine slag CGFS is a by product of coal gasification with large output high carbon content and high calorific value Guo et al 2020a Coal gasification crude slag is similar in composition to boiler bottom slag which can be used as mixed raw material of road bridge and other building materials
·When copper slag is used as the heat carrier the adsorption effect of CaO on CO 2 is most pronounced at temperatures of 600 °C and 700 °C with CO 2 proportion reduced to 8% and H 2 proportion reaching 65% Additionally CaO exhibits a significant promotion effect on carbon conversion rate and gasification efficiency at temperatures above 800 °C with the
·Foam concrete possesses low density and excellent thermal insulation properties and has been widely used in construction industry Considering the recycling and reusing of coal gasification slag CGS a solid waste product in the coal chemical industry CGS was used as the supplementary cementations material to prepare foam concrete CGS FC in
·Coal gasification slag is primarily composed of SiO 2 Al 2 O 3 CaO Fe 2 O 3 and residual carbon and its main mineral phase consists of amorphous aluminosilicate mixed with quartz crystal phase minerals [10] [11] The chemical composition characteristics and special mineral phase composition of rich silicon aluminum and carbon resources determine the high
·Coal one of China s most abundant natural resources plays a crucial role in providing substantial energy and promoting economic growth However the disposal and storage of large quantities of coal based solid waste CBSW such as coal gangue CG fly ash FA and coal gasification slag CGS generated during coal production and utilization processes pose
·Coal gasification fine slag CGFS is a large solid waste in the field of coal chemical industry and its land occupation and environmental pollution caused by stockpiling and landfill make its comprehensive utilization imminent The composition and structure of CGFS is the basis of its resource utilization particle size classification and
·Underground coal gasification UCG is a promising option for the recovery of low rank and inaccessible coal resources Detailed mineralogical information is essential to understand underground reaction conditions far from the surface and optimize the operation parameters during the UCG process It is also significant in identifying the environmental
·The adsorption of Sb V and As V onto iron loaded gasification slag composite material Fe GFS as well as the possible mechanisms was investigated Batch experiments showed that in a single system Fe GFS sorbed As V to a greater extent than Sb V with the maximum adsorption capacity pH of mg/g mmol/g while that of Sb V was
·SEM particle size analysis and contaminant content of coarse coal gasification slag CCGS produced by Shenhua Xinjiang Chemical Co Ltd were measured respectively and the physicochemical properties of the soil after improvement using gasification slag were investigated in this paper The results showed that the slag was porous the particle
