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Approach to the management of magnesium slag via the …

This work aims to develop another approach to the management of magnesium slag (MS) via the production of Portland cement clinker. Thus, 0, 10, 20, 30, …

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Reusing Desulfurization Slag in Cement Clinker Production …

The purpose of this study was to investigate the reuse of desulfurization slag in cement clinker production and its influence on the formation of clinker phases. The …

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Preparation of high performance blended cements and reclamation …

Clinker particles finer than 10 μm is excluded by classification, then slag product, residual ground cement clinker and gypsum dehydrate are mixed homogeneously into blended cements. The two methods are labeled …

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Influence law and control mechanism of manufactured sand particles …

The particle size range of cement was generally 7–200 μm, so the probability of a single C–S–H cluster like the figure was very low. The above phenomena indicated that the manufactured sand particles could cause the hydration products (mainly C–S–H, Ca(OH) 2 and AFt) to nucleate and grow between clinker particles. The mechanism …

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Preparation and carbonation hardening of low calcium CO2 …

After carbonation, unreacted clinker particles, crystalline CaCO 3, and highly polymerized silica formed a dense microstructure, ... Calcium carbide slag (CCS) is a solid waste from the hydrolysis of calcium carbide to obtain acetylene gas, with Ca(OH) 2 as the main component. Acetylene gas can be further used to prepare polyvinyl …

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Hydration kinetics of ternary slag-limestone cements: Impact …

In a second step the slag and the clinker phases were distinguished using a k-means clustering algorithm based on the Mg, Si, Al, and Ca EDX elemental maps. An example of the segmentation of slag particles based on SEM-EDX mappings is given in Fig. 2. Download: Download high-res image (551KB) Download: Download full-size …

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Adverse Effects of Using Metallurgical Slags as …

This is due to the fact that these heavy metal compounds can form a crystalline film on the surface of clinker particles, wrapping the clinker particles and hindering hydration. For example ... On the one hand, the rapid cooling of EFS by water causes the slag particles to exhibit more micro cracks, thus, accelerating the …

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Process to utilize crushed steel slag in cement industry …

In summary, clinkers prepared with steel slag as ferric raw material have a similar or even better performance than the ordinary clinker. 0.15 mm is the maximum particle size of steel slag that can be fully involved in the clinker sintering reaction. Particles larger than 0.15 mm are considered coarse particles in this study.

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Direct use of original granular steel slag to prepare multi …

Steel slag changed the clinker mineralogical composition and resulted in the ferrite phase reaching 18.07–28.09%. Laboratory tests showed that the multi-phased …

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Optimization of gypsum and slag contents in blended cement containing slag

The slag, clinker and gypsum were ground and sieved to a particle size of under 70 μm. All the blended cements were intermixed by slag, gypsum and clinker in the laboratory. A ternary contour design method as described in Ref. [31] was applied to design the blending proportions of the slag, gypsum and clinker. The blended cement with less …

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Effect of particle size and slag content on the early …

Also, for slag-containing cements such as S20 and S35, the amounts of the clinker phases decrease with increasing particle size since slag/clinker increases. One could test the success of this method for the control cements by directly inputting the measured oxide contents in Table 2 into Bogue's equations. Values calculated as such are ...

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Nickel Slag

Granulated nickel slag is essentially an angular, black, glassy slag "sand" with most particles in the size range of − 2 mm (No. 10 sieve) to + 0.150 mm (No. 100 sieve).It is more porous, with lower specific gravity and higher absorption, than air-cooled nicked slag.

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Blast furnace slag obtained from dry granulation method …

The Ca 2+ ions and SiO 4 2− ions released and the C S H phase generated in the pores among slag particles and cement clinker particles. The SEM study indicated that the C S H phases grew in the pores and collapsed silicate network structure, interconnecting the slag particles and cement phases to form the compact structure. …

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Experimental Study on Calcination of Portland …

In order to increase the utilization rate of stainless steel slag, reduce storage needs, and mitigate environmental impacts, this study replaces a portion of limestone with varying amounts of stainless steel …

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Effect of clinker phase distribution within cement particles on

Similarly, replacement of fine clinker particles with slag decreases 12-h heat more than replacement of intermediate particles but the difference diminishes beyond about 24 h. A strong linear relation exists between the 24-h and 48-h heats of the cements and could be useful for modelling the hydration rate of Portland or blended cements.

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Use of Slags in the Production of Portland Cement Clinker

The basic clinker fusion is formed at 1327 °C. These differences in A-F formation are clear with the increase of slag concentration in raw mixes. The gehlenite …

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Utilization of steelmaking slag in cement clinker production: …

The cement industry significantly contributes to global CO 2 emissions, with a notable portion attributed to limestone calcination during cement clinker production. To …

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An Experimental Study on Separately Ground and …

The results of this study showed that the grinding time required for slag particles are higher than portland cement clinker particles for all the tested Blaine fineness values; therefore, the grind ability of the slag is observed to be lower than the grind ability of the clinker. The results indicated that the increasing the Blaine

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Investigation on industrial trial production of multi-phased clinker …

The interface area between reconstructed steel slag and clinker forms high-iron phase clinker ... Clinker particles were encapsulated with epoxy resin, ground and polished with a polishing machine, and eroded in 1% NH 4 Cl solution. After dried for 3–5 s, the sample was observed by a NIKON LV100POL microscope. The chemical bonding …

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Investigation on industrial trial production of multi-phased …

The interface area between reconstructed steel slag and clinker forms high-iron phase clinker ... Clinker particles were encapsulated with epoxy resin, ground and …

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Morphology and microstructure of autoclaved slag-clinker …

Morphology and microstructure of autoclaved slag-clinker and slag-clinker-sand mixtures were undertaken using scanning electron microscopy. The microstructure of autoclaved slag-clinker hydration products displayed nearly amorphous, fibrous and radial plates of C S H phase, large cubes of hydrogarnet-like hydrates (mainly as C 3 ASH 4) …

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Produce low-CO2 sustainable cement–slag binder

This finding suggested that AS did not reduce clinker hydration in later slag–cement binders. In most cases, the use of alkali accelerators yielded the opposite results. This phenomenon was attributed to the fact that AS promoted the production of a large amount of AFt but could not completely cover the clinker particles (Wang et al., …

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An all solid waste CO2 sequestration material consist of …

An all solid waste CO 2 sequestration material consist of multiple calcium silicate clinkers by carbide slag, copper tailing and red mud: Clinker crystal transformation and carbonation hardening properties. Author links open overlay panel ... Fig. 4 is the particle size distribution of RM-modified clinkers after grinding for 1 min. It was found ...

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Effect of the fineness of copper slag on the early hydration …

Taking copper slag to replace the same proportion cement can prolong its induction period and reduce its early hydration heat and its hydration heat rate, which is …

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Preparation of composite micro-slag based on the …

The results showed that the grinding process improves the particle morphology of the tailings slag, thereby affecting the interaction between the particles, which not only promotes the particles to receive uniform energy during the calcination process, reduces the energy consumption of clinker firing, but also stimulates the …

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Ultra-High-Performance Concrete (UHPC): A microstructural and particle

It is recommended to use a slag or clinker component with a bimodal particle size distribution when composition mineral additives can be made by incorporating slag or clinker into the concrete ...

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Reactivity and performance of dry granulation blast furnace slag …

The dry granulation slag were ground using ball milling, and then, the slag powder were mixed with clinker. Fig. 2 shows particle size distributions for cement clinker and dry granulation slag with different milling time, which were determined by using a laser diffraction particle size analyzer. The particle size distribution for dry granulation slag …