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- W2368882636 abstract "Thermal decomposition of cubic magnesite blocks with the side length of 20 mm,30 mm,40 mm and 50 mm were investigated by TG. The results indicate that under the same conversation ratio,decomposition activation energy increases with size of block magnesite increasing. The relation between block size(L = 20-50 mm) and activation energy meets the formula: E = 4. 795 × L + 34. 070(kJ /mol).Thermal decomposition of magnesite block is controlled by different mechanism functions at different decomposing stages: At earlier stage,3D mould with n = 2 controlled by Anti-Jander's formula is the most probable mechanism function. Decomposition equation is dα /dT = 6. 111 × 1010× β- 1exp [(4. 098- 0.577 × L) × T- 1](1 +α)2 /3[(1 +α)1 /3- 1]- 1; In the middle stage,random nucleation and subsequent growth models with n = 3(Code: AE3) controlled by Avrami-Erofeev formula is the most probablemechanism function. Decomposition equation is dα /dT = 1. 422 × 109× β- 1exp[(4. 098- 0. 577 × L) ×T- 1](1-α) [-ln(1-α) ]- 2; in the later stage,random nucleation and subsequent growth models with n = 3 /2 controlled by Avrami-Erofeev formula is the most probable mechanism function. Decomposition equation is dα /dT = 2. 477 × 109× β- 1exp[(4. 098- 0. 577L) × T- 1](1- α) [- ln(1- α) ]- 2. The study provides a theoretical basis for the planning of block magnesite production MgO process." @default.
- W2368882636 created "2016-06-24" @default.
- W2368882636 creator A5088117304 @default.
- W2368882636 date "2014-01-01" @default.
- W2368882636 modified "2023-09-25" @default.
- W2368882636 title "Thermal Decomposition Mechanism and Establishment of Kinetic Equations of Block Magnesite" @default.
- W2368882636 hasPublicationYear "2014" @default.
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