Study on Reclamation of CO2-hardened Sodium Silicate Used Sands by CaO Powder

• Autorzy: Lu Jijun , Yang Lei , Qian Jiangbing , He Wei , Wang Huafang

Identyfikatory

DOI

10.24425/afe.2022.140242

• Języki publikacji: EN

Abstrakty

EN

Aiming at the problems of wet reclamation consuming a lot of water, dry (mechanical) reclamation having wear and power consumption, this paper to find suitable reclamation reagents to reduce the influence of harmful substances in used sodium silicate sands. By comparing the reclamation effect of CaO, Ca(OH)₂ and Ba(OH)₂ reclamation powder reagents, it was concluded that CaO had the best reclamation effect. Through the single factor experiment, the influence of CaO on the reclamation effect was explored: 1. addition amount of CaO; 2. the additional amount of water; 3. reclamation time. The orthogonal results showed that the CaO reclamation effect was the best when the amount of CaO was 1.5%, the amount of sodium silicate was 4.0%, the amount of water added was 6.0%, and the reclamation time was 12.0h. In this experiment, 82.2% carbonate and 75.0 % silicate in used sands can be removed. The microscopic analysis of the reclamation sands was carried out by scanning electron microscope (SEM); The surface was relatively smooth, without large area cracks and powder accumulation. Compared with the used sands, the instant, 24h ultimate, and residual strengths of the reclaimed sands were increased by 536.5%, 458.1%, and 89.8%, respectively, which was beneficial to the reclamation of the CO₂ sodium silicate used sands.

Słowa kluczowe

EN

sodium silicate sands; reclamation; orthogonal experiment; wet reclamation; dry reclamation; hardening of the sands

PL

masa krzemianowo-sodowe; regeneracja; utwardzanie; eksperyment

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2022
• Tom: Vol. 22, iss. 3
• Strony: 99--106
• Opis fizyczny: Bibliogr. 18 poz., il., tab., wykr.

Twórcy

autor

Lu Jijun

• Wuhan Textile University, School of Mechanical Engineering and Automation, Wuhan, China

• https://orcid.org/0000-0003-1551-7152

autor

Yang Lei

• Wuhan Textile University, School of Mechanical Engineering and Automation, Wuhan, China

• https://orcid.org/0000-0003-4213-7446

autor

Qian Jiangbing

• Wuhan Textile University, School of Mechanical Engineering and Automation, Wuhan, China

• https://orcid.org/0000-0002-5376-3744

autor

He Wei

• Wuhan Textile University, School of Mechanical Engineering and Automation, Wuhan, China

• https://orcid.org/0000-0002-1642-8154

autor

Wang Huafang

• Wuhan Textile University, School of Mechanical Engineering and Automation, Wuhan, China

• https://orcid.org/0000-0001-5337-2818

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)