Polysilicon Process [Daily Question] 1/9/2012
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This post was last edited by yizhuxuan on 2012-2-1 08:10. Today’s 【Daily Question】 on polysilicon production: 1. The modified Siemens process is widely used in current polysilicon production; what is the required particle size of the raw silicon powder for this process? (C) A. 40 mesh to 120 mesh; the total amount of silicon powder that is below 40 mesh or above 120 mesh shall not exceed 20%. B. 60 mesh to 100 mesh; the total amount of silicon powder that is below 40 mesh or above 120 mesh shall not exceed 20%. C. 40 mesh to 120 mesh; the total amount of silicon powder that is below 40 mesh or above 120 mesh shall not exceed 10%. D. 60 mesh to 100 mesh; the total amount of silicon powder that is below 40 mesh or above 120 mesh shall not exceed 10%. Notes: 1. —↑↓Polysilicon version♫Activity schedule♫Moderator’s quick guide↓↑— 2. Please be sure to hide your replies! Hide method address. If no reply is set, it will be deleted ； 3. Participation earns 2 wealth points as a reward; correct answers grant 5 wealth points, and those who provide a brief analysis may receive an additional 1-2 wealth points at the discretion of the organizers ； Each reply allows only one rating; moderators are requested to cancel any invalid ratings ； 4. Do not edit after replying; editing after replying will only earn you 2 wealth points as a reward ； 5. The purpose of this activity is to boost everyone’s enthusiasm for participation and to learn together about the knowledge related to the polysilicon segment ； 6. Encourage rating: Rating other sea friends does not consume one’s own funds, but rather the funds allocated by the system on a regular basis. For users who receive positive ratings, a gratitude award will be presented on a monthly basis in this edition; please stay tuned ； 7. Members who have any objections to the questions can contact me via private message to discuss them. 8. Summary post of daily questions for the polysilicon section in November; Summary post of daily questions for the polysilicon section in December. The answer is C
D I choose D. I’m not sure if it’s correct!
1. The modified Siemens process is widely used in polysilicon production at present, and this process requires the particle size of the raw silicon powder to be (B). A. 40 mesh to 120 mesh; the total proportion of silicon powder with a particle size of less than 40 mesh or greater than 120 mesh is no more than 20%. B. 60 mesh to 100 mesh; the total proportion of silicon powder with a particle size of less than 40 mesh or greater than 120 mesh is no more than 20%. C. 40 mesh to 120 mesh; the total proportion of silicon powder with a particle size of less than 40 mesh or greater than 120 mesh is no more than 10%. D. 60 mesh to 100 mesh; the total proportion of silicon powder with a particle size of less than 40 mesh or greater than 120 mesh is no more than 10%
C. The particle size range is from 40 mesh to 120 mesh; the total proportion of silicon powder with a particle size of less than 40 mesh or greater than 120 mesh shall not exceed 10%
C. The particle size range is from 40 mesh to 120 mesh; the total proportion of silicon powder with a particle size of less than 40 mesh or greater than 120 mesh should not exceed 10%. This requirement may vary depending on the specific furnace
Reply 1# yizhuxuan C
D replies to 1# yizhuxuan
C. The particle size range is from 40 mesh to 120 mesh; the total proportion of silicon powder with a particle size of less than 40 mesh or greater than 120 mesh shall not exceed 10%