Cement kiln
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Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO <sub>3</sub> while producing useful gas streams Open
Cement production is currently the largest single industrial emitter of CO 2 , accounting for ∼8% (2.8 Gtons/y) of global CO 2 emissions. Deep decarbonization of cement manufacturing will require remediation of both the CO 2 emissions due …
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Alternative Clinker Technologies for Reducing Carbon Emissions in Cement Industry: A Critical Review Open
Currently, the production of one ton of ordinary Portland cement (OPC) releases considerable amounts of CO2 into the atmosphere. As the need and demand for this material grows exponentially, it has become a challenge to increase its produc…
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Global CO <sub>2</sub> uptake by cement from 1930 to 2019 Open
Because of the alkaline nature and high calcium content of cements in general, they serve as a CO2-absorbing agent through carbonation processes, resembling silicate weathering in nature. This carbon uptake capacity of cements could abate …
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Techno-economic Analysis of MEA CO2 Capture from a Cement Kiln – Impact of Steam Supply Scenario Open
This paper present the techno-economic assessment of an MEA-based CO2capture from a cement plant and the importance of the steam supply on the costs. The evaluations present the energy performances of the CO2capture process based on a ceme…
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Improvement of poor subgrade soils using cement kiln dust Open
Construction of pavements layers on subgrade with excellent to good properties reduces the thickness of the layers and consequently reduces the initial and maintenance cost of highways and vice versa. However, construction of pavements on …
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Chlorides Removal and Control through Water-washing Process on MSWI Fly Ash Open
Wet pretreatment is widely employed as the most economic method to treat municipal solid waste incineration (MSWI) fly ash. Meanwhile, much wastewater containing high concentration of chlorides generated during the wet process if the liqui…
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Industrial calcination of kaolinitic clays to make reactive pozzolans Open
This paper presents the results of an industrial trial for the production of calcined clay to be used as pozzolan in cement manufacture. For the trial, a wet-process clinker rotary kiln was modified to process on dry basis the low grade ka…
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Current state of industrial heating and opportunities for decarbonization Open
The IPCC recommends keeping the global average temperature increase well below 2 °C, if not below 1.5 °C, by 2100 to avoid the worst effects of climate change. This requires achieving carbon neutrality shortly after 2050. In the United Sta…
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Process integration study of tail-end Ca-Looping process for CO 2 capture in cement plants Open
In this work, the integration of Calcium looping (CaL) process into a cement plant for post-combustion CO2capture is assessed via process simulations. In the proposed scheme, the carbonator of the CaL process is used as an end-of-pipe unit…
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Clay soil stabilization using cement kiln dust Open
This research investigated the suitability of cement kiln dust (CKD) on the stabilization of clayey soil extracted along a failed road section of Sango, Ota. Since CKD does not need any further processing or treatment, it is cheap as it is…
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Influence of Moisture Contents on the Fast Pyrolysis of Trommel Fines in a Bubbling Fluidized Bed Reactor Open
In this study, the effect of moisture contents [2.69 wt% (bone-dry), 5 wt% and 10 wt%] on product yields and process conversion efficiency during fast pyrolysis of a pre-treated trommel fines feedstock was investigated at 500 °C. Experimen…
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Hydration of cement by-pass dust Open
Cement kiln dusts (CKD) generated during the production of Portland cement clinker differ markedly in composition and, hence, in properties. These dusts are commonly used as an addition to cement. In this article the way in which the selec…
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Effect of curing time on strength development in black cotton soil – Quarry fines composite stabilized with cement kiln dust (CKD) Open
Combined treatment techniques have been adopted by many pavement designers and site engineers to improve the strength and stability of subgrades or foundation soils of expansive sites. In this regard, research was conducted to investigate …
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Study of a full scale oxy-fuel cement rotary kiln Open
Oxy-fuel combustion has been shown to be an attractive technology to be implemented in cement production with CO2 capture from a process point of view. Due to the market situations and future perspectives it is necessary that the technolog…
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Recycling of Cement Kiln Dust as a Raw Material for Cement Open
Cement kiln dust (CKD) is a major by-product of cement manufacturing and has the potential to be recycled as a raw material if the high concentrations of chlorine and potassium are removed. This study tested four leaching solutions (distil…
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Cement Kiln Dust (CKD): Potential Beneficial Applications and Eco-Sustainable Solutions Open
Over many decades, cement has been the primary component in construction projects and is considered one of the essential industries worldwide. At the same time, it overconsumes natural resources and can negatively impact the environment th…
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Assessment of heavy metals released into the air from the cement kilns co-burning waste: Case of Oujda cement manufacturing (Northeast Morocco) Open
The metallic contents released into the air from cement kilns of Oujda cement plant have been investigated. Heavy metal (HM) concentrations of kiln gas emissions were evaluated and compared to Moroccan standards. The analyzes revealed the …
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The influence of volcanic ash (VA) on the mechanical properties and freeze-thaw durability of lime kiln dust (LKD)-stabilized kaolin clayey soil Open
Improving soft clay soil's mechanical properties and durability has been the subject of intense research. In this context, traditional stabilizers such as cement and lime have been introduced as the most widely used materials. However, the…
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Co-processing of Industrial Waste in Cement Kiln – A Robust System for Material and Energy Recovery Open
Waste management is a serious issue around the world. It is most prominent in the developing countries. Non–hazardous industrial waste is another aspect at 100 million tons/year with coal ash accounting for 70 million ton/year in India. It…
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Microstructure and chemical characterizations with soft computing models to evaluate the influence of calcium oxide and silicon dioxide in the fly ash and cement kiln dust on the compressive strength of cement mortar Open
Environmental issues are raised from the global warming due to raised Carbon Dioxide (CO2) emissions of factories worldwide. Cement manufacturing is highly energy- and emissions-intensive because of the extreme heat required to produce it.…
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Optimization of bio-cement production from cement kiln dust using microalgae Open
The main aim of this study was to maximize bio-cement (CaCO3) production through a waste feedstock of cement kiln dust (CKD) as a source of calcium by deployment of microalgae sp. Chlorella kessleri. The effect of process parameters such a…
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One-dimensional model of entrained-flow carbonator for CO2 capture in cement kilns by Calcium looping process Open
In this work, a 1D model of an entrained-flow carbonator of a Calcium looping process for cement plants is presented and the results of a sensitivity analysis on the main governing process parameters is discussed. Several design and operat…
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Production of belite calcium sulfoaluminate cement using sulfur as a fuel and as a source of clinker sulfur trioxide: pilot kiln trial Open
A pilot-scale trial was undertaken in a 7·4 m kiln to demonstrate the production of belite calcium sulfoaluminate cement clinker using sulfur as a raw feed. The sulfur was introduced in its elemental form as fuel to the burner, thus partia…
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Experimental study on properties of natural soils treated with cement kiln dust Open
Soil improvement by the addition of chemical or cementitious additives is emerged as a remarkable solution to provide a suitable ground for infrastructure construction. Previous studies have used several additives together with the cement …
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Utilization of by-pass cement kiln dust and air-cooled blast-furnace steel slag in the production of some “green” cement products Open
By-pass cement kiln dust (CKD) is a fine-grained alkaline particulate material similar in appearance to Portland cement collected in the air-pollution control devices (such as cyclones, bag house or electrostatic precipitators) during the …
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Development of high performance concrete using industrial waste materials and nano-silica Open
There is a concerted effort worldwide to use environment-friendly binders in the establishment of civil infrastructure. The use of such materials, as a partial or total replacement of Portland cement, leads to technical, economic and envir…
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Overview of municipal solid wastes-derived refuse-derived fuels for cement co-processing Open
The global municipal solid waste (MSW) generation rate is 2.01 billion metric tonnes annually with an average of 0.74 kg waste/person/day. Approximately 92 % of the MSW originates from organics composition (e.g., food waste; plastic; paper…
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Development and Testing of Low-Energy-Intensive Technology of Receiving Sulphate-Resistant and Road Portlandcement Open
The article presents the results of obtaining clinkers of sulfate resistant and road cement in the process of production tests. The use of man-made waste (lead slag, coal mining waste) as a clay component and additive is analyzed. X-ray, c…
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Parametric Studies of Cement Production Processes Open
The cement industry is one of the most intensive energy consumers in the industrial sectors. The energy consumption represents 40% to 60% of production cost. Additionally, the cement industry contributes around 5% to 8% of all man-made CO …
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Opportunities and challenges of using SRF as an alternative fuel in the cement industry Open
Over two billion tonnes of municipal solid wastes (MSW) are generated annually from households, industrial facilities, and commercial sites. The non-hazardous fraction of MSW is used to produce solid recovered fuels (SRF), which have an ec…