Qinghai Salt Lake Industry Co.

Golmud, China

Qinghai Salt Lake Industry Co.

Golmud, China

Time filter

Source Type

Zong L.,CAS Lanzhou Institute of Chemical Physics | Zong L.,Lanzhou University of Technology | Li L.,CAS Lanzhou Institute of Chemical Physics | Li L.,Lanzhou University of Technology | And 6 more authors.
Journal of Cluster Science | Year: 2016

Nanosized dispersive flake-like magnesium hydroxide (Mg(OH)2) had been prepared by a hydrothermal method. In the process, when the surfactant polyvinyl pyrrolidone was added, high dispersion, small particle size and large specific surface area of hexagonal crystal magnesium hydroxide was obtained by ultrasonic dispersion and temperature program. The flame retardant of Mg(OH)2 was systematically explored by scanning electron microscope (SEM), transmission electron microscopy, X-ray diffraction, BET analysis and thermo-gravimetric analysis tests. SEM showed the formation of uniform and small size magnesium hydroxide particle with hexagonal nanoscale. Under the optimized conditions, high nano-sized hexagonal Mg(OH)2 was acquired with a mean particle size of 134 nm and a specific surface area of 26.66 m2/g. According to TGA results, the sample’s decomposition temperature was 626.9 K, which was consistent with the reported literature. It is vitally prospected that the prepared hexagonal Mg(OH)2 is to be applied to the industry as a flame retardant. © 2016 Springer Science+Business Media New York


Yang C.,East China University of Science and Technology | Song X.-Fu.,East China University of Science and Technology | Huang S.-S.,Qinghai Salt Lake Industry Co. | Wang J.-F.,Qinghai Salt Lake Industry Co. | And 3 more authors.
Chinese Journal of Inorganic Chemistry | Year: 2012

Hydromagnesite mierospheres were synthesized by a sodium dodeeyl sulfate-assisted process under lower temperature (<55°C). The process was conducted via reactive crystallization of magnesium chloride with sodium carbonate solution. The effects of synthesis conditions' such as SDS amount' the reactive temperature, reactant concentration and NaCl concentration, were experimentally investigated by means of XRD, FTIR, SEM and other methods. The results showed that when the reactive temperature <55°C and the reactant concentration <0.20 mol·L -1, the presence of SDS can effectively inhibit the amorphous nanoparticles grow into MgCO 3·3H 2O, and promote the transformation to hydromagnesite by the assembling crystallization of amorphous nanoparticles. Therefore, SDS amount, reactive temperature, reactant concentration and NaCl concentration play a regulatory role on the microspheres' size and morphology of as-synthesized hydromagnesite.


Xu Y.-X.,East China University of Science and Technology | Tang B.,East China University of Science and Technology | Song X.-F.,East China University of Science and Technology | Li S.-M.,Qinghai Salt Lake Industry Co. | And 2 more authors.
Huadong Ligong Daxue Xuebao/Journal of East China University of Science and Technology | Year: 2013

The Computatinonal Fluid Dynamic(CFD) technique was used to describe the flow field in the 140 mm hydrocyclone, and the computational model was validated by Particle Image Velocity(PIV) measurement. Based on the results of simulation and experiments, the inner pressure, tangential velocity, axial velocity and radial velocity distribution within the hydrocyclone were characterized. Moreover, the transient flow field in the form of velocity vector maps of cylindrical part with different inlet velocities was obtained by PIV technology. The computational and experimental results show that the CFD simulation is deemed to be an adequate methodology for investigating the flow patterns inside the hydrocyclone and studying the separation mechanism; good qualitative agreements between computational and experimental results are achieved; the PIV measurement validates the accuracy of computational model.


Yang C.,East China University of Science and Technology | Song X.-F.,East China University of Science and Technology | Li S.-M.,Qinghai Salt Lake Industry Co. | Sun Z.,East China University of Science and Technology | And 2 more authors.
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | Year: 2013

On-line FBRM(Focused Beam Reflectance Measurement) was employed to monitor the change trends of particle chord length (CL) and counts per second (CPS). Scanning electron microscopy (SEM) and powder diffraction (XRD) were used to characterize sample morphology and crystal form. Based on these, the secondary processes of nesquehonite in electrolyte solutions were investigated. Experimental results show that: NaCl and Na2CO3 have no significant effects on the nesquehonite secondary processes. Nesquehonite particles become larger in MgCl2 solution. Theoretical calculations show that the Ostwald ripening is not obvious in the secondary processes of nesquehonite. Based on the analysis of the nesquehonite structure and the products morphology, it was found that the MgCl2 greatly promotes the aggregation of nesquehonite crystals. The morphology of nesquehonite is transferred from the rod-like to the bundle-like structure by aggregation. Under the experimental conditions, the chord length increases more than 20% and it firstly increases and then decreases with the increase of MgCl2 concentration. The aggregation occurrs among those particles with the chord length below 20 μm. The aggregation leads to the increase in particle number and size of particles with the chord length above 20 μm.


Xu Y.-X.,East China University of Science and Technology | Song X.-F.,East China University of Science and Technology | Wu Y.-Z.,Qinghai Salt Lake Industry Co. | Guo Y.-X.,Qinghai Salt Lake Industry Co. | And 3 more authors.
Huadong Ligong Daxue Xuebao/Journal of East China University of Science and Technology | Year: 2012

The computational fluid dynamic (CFD) technique was used to describe the flow fluid and the classification efficiency in the 428 mm industrial hydrocyclone. Through the model validation, the feasibility of the model was determined. And on the basis of the simulation method, effects of the vortex finder, including the vortex finder diameter, length and thickness, on the performance of the hydrocyclone were studied, focusing on the effect of air core, pressure drop, split ratio, and the classification efficiency. The results show that the different vortex finders have great effect on the performance of the hydrocyclone, especially the vortex finder diameter. The calculated optimal overflow size is, diameter of 180 mm, length of 168 mm, and thickness of 2 mm.

Loading Qinghai Salt Lake Industry Co. collaborators
Loading Qinghai Salt Lake Industry Co. collaborators