The Preparation of High Purity Silicon Dioxide from Boron Mud - The Solid Wastes of Boromagnesite for Producing Borax by Alkali or Soda

Ning, Zhi; Zhai, Yuling; Duan, Hua Mei

doi:10.4028/www.scientific.net/amr.233-235.1296

Cited by 5 publications

(1 citation statement)

References 5 publications

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“…There are a large quality of boron resources in the form of boromagnesite in china and its reserves rank the forth position of the world follows American, Turkey and Ruissa. Many researches for leaching MgO and B 2 O 3 from boromagnesite have been reported [1~5] , but few researches [6] for the residual slag that MgO and B 2 O 3 are removed from boromagnesite still.…”

Section: Introductionmentioning

confidence: 99%

Study on the Leaching SiO<sub>2</sub> from Boromagnesite by Using Sodium Hydroxide

Ning

Zhai

Duan

et al. 2012

AMR

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The residual rich SiO2 slag was obtained for MgO and B2O3 was leached from the boromagnesite by ammonium sulfate. The SiO2 was leached from the residual slag by sodium hydroxide. The effect of the roasting time, calcination temperature and the ratio of sodium hydroxide to the residual slag on the leaching efficiency of SiO2 in the residual slag were also studied. The reasonable technical condition as follow : the roasting time is 60 min, the calcination temperature is 550°C, the ratio of the sodium hydroxide to the residual slag is 3.0:1. The SiO2 leached rate can be stabilized about 85% under this condition.The residual rich SiO

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Section: Introductionmentioning

confidence: 99%

Study on the Leaching SiO<sub>2</sub> from Boromagnesite by Using Sodium Hydroxide

Ning

Zhai

Duan

et al. 2012

AMR

Self Cite

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Preparation of Low Carbon Silicomanganese Slag-Based Alkali-Activated Materials Using Alkali-Activated Silica Waste

Zheng,

Zhang,

Liu

et al. 2024

Buildings

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The utilization of silicomanganese slag (SiMnS) as a precursor for alkali-activated materials (AAMs) is considered as an efficient approach for sustainable and eco-friendly large-scale resource utilization. However, sodium silicate solutions account for more than 50% of the production costs and carbon emissions of AAMs. In this study, AAM activators were prepared by silica-containing waste (acid leaching residue of boron mud, BM-AR) and NaOH as raw materials, and were successfully substituted for commercial sodium silicate-NaOH activators. Results indicated that the NaOH dosage had a great effect on the concentration and modulus of the activator. With the appropriate dosage of NaOH (NaOH: BM-AR = 0.4–0.7), suitable moduli of AAM activators can be produced at a wide range of solid/liquid ratios (L/S = 3–4.5) under mild conditions (80–100 °C). The compressive strength of the SiMnS AAM specimens prepared by this activator can reach 68.58 MPa, and its hydration products were mainly hydrated calcium silicate and amorphous silica–alumina gel, indicating the successful preparation of AAM. Calculation showed that the carbon emission of the AAMs prepared in this study was 12.4% and 37.6% of that of OPC and commercial water glass/NaOH-activated AAMs, and the cost was only 67.14% and 60.78% of them. The process achieves the use of waste materials to replace commercial activators, and is expected to be extended to a variety of AAMs raw materials and silica-containing waste. This makes it a highly promising alternative method for the production of AAMs, particularly the ‘just add water’ AAMs.

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Study on the Preparation and Compressive Strength of Boron Mud-Based Basic Magnesium Sulfate Cement

Li,

Gu,

Wang

et al. 2024

Materials

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The direct discharge of boron mud poses significant environmental hazards to soil and groundwater. Despite extensive research efforts, the reprocessing of boron mud has not yielded significant advancements. Recently, the development of magnesium cement has spurred interest in the reutilization of boron mud. However, the direct treatment of boron mud remains challenging, necessitating pre-treatment in most studies to achieve substantial results. Consequently, research on the direct incorporation of untreated boron mud is scarce. This study explores the feasibility of using uncalcined boron mud as a base material in basic magnesium sulfate cement (BMSC), composed of lightly calcined magnesia and magnesium sulfate heptahydrate. The effects of varying boron mud content on the compressive strength of the BMSC system were investigated. The results indicate that the 5·1·7 phase is the primary strength phase of BMSC. When the boron mud content is 30%, the uncalcined boron mud has a minimal impact on the formation of the 5·1·7 phase. Additionally, the 28 days compressive strength of BMSC-B30 showed a slight difference compared to the control group BMSC-C, registering at 66.7 MPa. TG-DSC analysis revealed that the presence of a small amount of boron mud inhibits the micro-expansion trend of the BMSC structure. Furthermore, XRD and SEM analyses confirmed that the addition of uncalcined boron mud does not significantly alter the phase structure of the 5·1·7 phase in BMSC. This study provides a foundational basis for the long-term development of direct boron mud treatment.

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The Preparation of High Purity Silicon Dioxide from Boron Mud - The Solid Wastes of Boromagnesite for Producing Borax by Alkali or Soda

Cited by 5 publications

References 5 publications

Study on the Leaching SiO<sub>2</sub> from Boromagnesite by Using Sodium Hydroxide

Study on the Leaching SiO<sub>2</sub> from Boromagnesite by Using Sodium Hydroxide

Preparation of Low Carbon Silicomanganese Slag-Based Alkali-Activated Materials Using Alkali-Activated Silica Waste

Study on the Preparation and Compressive Strength of Boron Mud-Based Basic Magnesium Sulfate Cement

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