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Mobile crushers can also be called mobile crushing plants, mobile crushers, etc. It is an inevitable product of high-tech crushing technology in the new era, and its main features are that it can be operated mobilely, can walk freely, and is more convenient for transitions, ensuring that the equipment While the production is safe, the work process is more reliable.
·This study summarized industrial by product gypsum into eight types flue gas desulphurization gypsum FGDG phosphogypsum PG titanium gypsum TG salt gypsum SG fluorgypsum FG nitro gypsum NG citric acid gypsum CAG and borogypsum BG Subsequently the chemical physical properties and annual productivity associated with
·Plaster or gypsum CaSO4·2H2O is obtained from a suspension of β calcium hemihydrate CaSO4·1/2H2O The effect of two additives known to retard setting namely citric and malic acids on the
The crystallization of Calcium sulfate dihydrate produced by the reaction between pure Ca OH 2 suspension and H2SO4 solution was investigated at different pH values temperatures and citric acid concentrations Crystal size distributions filtration rates and zeta potentials of gypsum were determined as a function of citric acid concentrations at pH and 65°C The influence of
·Measurements of the induction period for gypsum nucleation when citric acid is added in solution as an additive to retard calcium sulfate nucleation are reported in the present paper The supersaturation ratio was varied in the interval 4−5; the concentration of citric acid was varied from to g/L; and finally different temperature levels were explored in the
·To solve this problem the morphological modification of α HH gypsum by modifiers such as glutaric acid GA tricarballylic acid TA and citric acid CA was systematically studied Five concentrations of mM were considered for each modifier with mM as
·The citric acid CA is an organic acid with a global market value of USD billion Due to its non toxic and biodegradable nature it is widely used in the food industry and various other industries such as pharmaceutical biomedical textile and leather industries
·Citric acid can be used to retard the ettringite forming reaction between Al rich phases and gypsum As reported in [3] citric acid added at wt% to the mortar prolonged the initial setting time along with the presence of addition in [2] the concentration of citric acid solution was wt% in order to obtain an initial setting time of around 1 h
·For gypsum formed in the presence of citric acid Prisciandaro et al 2005 showed that the increase in induction time was due to a dramatic change in interfacial tension compared to an additive
·An aspect ratio AR close to 1 is essential to improve the quality and performance of α HH gypsum To solve this problem the morphological modification of α HH gypsum by modifiers such as glutaric acid GA tricarballylic acid TA and citric acid CA was systematically studied
·Poly l aspartic acid citric acid green copolymers were developed using thermal polymerization of aspartic acid ASP and citric acid CA followed by direct bulk melt condensation technique Antibacterial properties of copolymer of aspartic acid based were investigated as a function of citric acid content This study is focused on the microorganism
·Therefore in recent decades the preparation of CSW from the industrial by product phosphogypsum [3 4] residue of citric acid [5] waste calcium chloride [6] flue gas desulfurization FGD gypsum[7 8] has attracted great scientific interests because this reasonable utilization can save the natural gypsum resource and simultaneously
·It was found that under the conditions of a citric acid mass fraction of 10% at a 80 °C leaching temperature a leaching duration of 80 90 min and a liquid solid ratio of 8 the whiteness of
The specimens were cured for 90 days in a laboratory environment 23±3 ºC y 55±10% HR Before carrying out the tests the specimens were kept in an oven at a temperature of 40 ºC until the mass was constant The slightly different behavior of gypsum with added citric acid from the gypsum without additive could be due to the effect of
The simulations show that only in an alkaline environment is the crystal morphology of gypsum changed by retardation agents The simulations provide a detailed description of retardation for example the specific mechanisms by which tartaric and citric acid retard setting of gypsum and how they differ At high pH meso D and L tartaric
·It was found that the effect of citric acid on gypsum morphology was suppressed in the presence of Cr 3 ions The change of morphology is related to the complex formation between Cr 3 ions and citric acid at high ion concentrations Citing Literature Volume 33 Issue 5 Special Issue Industrial Crystallization May 2010
·By using Citribel s citric acid food manufacturers can cater to environmentally conscious consumers and contribute to a cleaner environment By embracing Citribel s citric acid the food industry gains access to a versatile ingredient that meets the highest quality standards and addresses the evolving needs of consumers
Ettringite based binder from ladle slag and gypsum The effect of citric acid on fresh and hardened state properties H Nguyen P Kinnunen K Gijbels V Carvelli H Sreenivasan AM Kantola Cement and Concrete Research 123 105800 2019
·Flue gas desulphurization FGD gypsum is a highly prevalent industrial by product worldwide which can be an excellent alternative to natural gypsum due to its high content of CaSO4·2H2O The preparation of α calcium sulfate hemihydrate is a high value pathway for the efficient use of FGD gypsum Here a dynamic method or an improved autoclaved
·Magnesium oxysulfate MOS mainly composed of magnesium oxide and magnesium sulfate is a kind of gas hardening cementing material with low energy consumption and CO2 emissions In order to develop environment friendly cement based materials MOS needs to be studied systematically The paper mainly investigates the influence of citric acid a
·The role of citric acid a retarder additive used to prolong the workability and setting time of gypsum binders was studied at concentrations of 0 125 250 500 1000 1500 and 3000 ppm with a constant water/binder hydration process setting was studied by the knife method conductivity measurements and attenuated total reflectance infrared
·Plaster or gypsum CaSO4·2H2O is obtained from a suspension of β calcium hemihydrate CaSO4·1/2H2O The effect of two additives known to retard setting namely citric and malic acids on the electrical conductivity and on the acoustic emission AE has been studied This work presents the correlation obtained between these two techniques and their
·An isolate of Penicillium bilaii previously reported to solubilize mineral phosphates and enhance plant uptake of phosphate was studied and the major acidic metabolites produced by P bilaii in a sucrose nitrate liquid medium were found to be oxalic acid and citric acid An isolate of Penicillium bilaii previously reported to solubilize mineral phosphates and enhance
·Citrate ion possesses the right structure to be strongly bound on specific crystal faces of gypsum which results in an increase in the induction time of precipitation and changes the
·The retarding effects of citric acid on building gypsum were the most significant With the improvement of living standards people s requirements for living environment are getting higher and higher To this end many scholars have done a lot of research including sterilization and humidity control [1] temperature adjustment [2
·This investigation provides insights into the effects of citric acid on both the fresh and hardened state properties of the binder produced from the hydration between ladle slag and gypsum LSG
·Citric acid is used in food pharmaceuticals beverages and agriculture and is a promising value added chemical which can be produced from biomass Dhillon et al 2011; Werpy et al 2004 Most of citric acid production is used as flavor enhancer in food and beverages 70% and the rest is used in buffers as an antioxidant and complexing metals
