三是要針對(duì)原燃料質(zhì)量變化，及時(shí)調(diào)整高爐操作方針。大多數(shù)企業(yè)生產(chǎn)都追求高產(chǎn)，尤其是在爐料質(zhì)量惡化的情況下還在追求高產(chǎn)，這是不明智的。提倡尊重?zé)掕F學(xué)基本原理，用生產(chǎn)條件論的觀點(diǎn)去指導(dǎo)生產(chǎn)。若追求高爐各項(xiàng)指標(biāo)都好，則必須具備良好的生產(chǎn)條件。一旦遭遇焦炭質(zhì)量惡化的情況，一定要及時(shí)調(diào)整高爐操作方針，特別是調(diào)整煤氣流分布，保持好合理爐型。一些企業(yè)采取降低煤比、提高焦比、提高爐料透氣性、促進(jìn)高爐順行的方法，無(wú)疑是正確的。
執(zhí)行器IC20-30Q3T芯科技，芯創(chuàng)新；88026934
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0192207111 Y-steel bearing UCP 214
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BALLUFF BMOA66RM-X63-1 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BIS-C-310-05 (Surplus New not in factory packaging)
BALLUFF C49BPE00PY050M CONNECTOR *NEW IN ORIGINAL PACKAGE*
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BALLUFF BTL5-A11-M0305-B-SU147-S32 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BES-Q08ZE-POC20B-BV06 (Surplus New In factory packaging)
BALLUFF BNS-519-101-1-WS-067 (Used, Cleaned, Tested 2 year warranty)
FREE 2 YR WARRANTY FREE US SHIPPING ON ORDERS OVER $25
BALLUFF BNS-519-101-1-WS-067 (Used, Cleaned, Tested 2 year warranty)
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BALLUFF BNS-519-101-1-WS-066 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BLE-S5-1-FS-15 (Surplus New In factory packaging)
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Balluff BES-516-325-BO-C Proximity Switch BES-516-325-B0-C - New No Box
BALLUFF BES-516-207-BO-E-03 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BES-516-207-BO-E-03 (Used, Cleaned, Tested 2 year warranty)
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燃?xì)鈮毫﹂_(kāi)關(guān)，DG40VC1-5WG/B，75454579
燃?xì)鈮毫﹂_(kāi)關(guān)，DG17VC1-6W/B，75455241
燃?xì)鈮毫﹂_(kāi)關(guān)，DG40VC1-6W/B，75455243
燃?xì)鈮毫﹂_(kāi)關(guān)，DG110VC1-6W/B，75455245
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燃?xì)鈮毫﹂_(kāi)關(guān)，DG17VC1-6WG/B，75455247
燃?xì)鈮毫﹂_(kāi)關(guān)，DG40VC1-6WG/B，75455249
燃?xì)鈮毫﹂_(kāi)關(guān)，DG110VC1-6WG/B，75455251
燃?xì)鈮毫﹂_(kāi)關(guān)，DG300VC1-6WG/B，75455252
燃?xì)鈮毫﹂_(kāi)關(guān)，DG40VC9-6W/B，75456344
燃?xì)鈮毫﹂_(kāi)關(guān)，DG17VC9-6W/B，75456403
燃?xì)鈮毫﹂_(kāi)關(guān)，DG60VC9-6W/B，75456404
燃?xì)鈮毫﹂_(kāi)關(guān)，DG150VC9-6W/B，75456405
燃?xì)鈮毫﹂_(kāi)關(guān)，DG300VC9-6W/B，75456406
燃?xì)鈮毫﹂_(kāi)關(guān)，DG40VC9-6WG/B，75457583
燃?xì)鈮毫﹂_(kāi)關(guān)，DG500VC1-6W/B，75457730
燃?xì)鈮毫﹂_(kāi)關(guān)，DG500VC1-6WG/B，75458957
燃?xì)鈮毫﹂_(kāi)關(guān)，DG17VC8D-6S32，84448004
在溫控閥調(diào)節(jié)后，這兩類(lèi)系統(tǒng)對(duì)總流量的影響是不相同的。圖1表示了系統(tǒng)的控制原理。圖中N用戶(hù)熱入口的控制閥可以為自力式流量控制閥，也可以為自力式壓差控制閥或平衡閥，溫控閥表示對(duì)應(yīng)熱用戶(hù)內(nèi)部的全部或部分溫控閥，未劃出散熱器。室內(nèi)系統(tǒng)可以是上述兩類(lèi)系統(tǒng)中的任何一種。有共用立管且戶(hù)內(nèi)為雙管的系統(tǒng)隨著室內(nèi)負(fù)荷的變化，溫控閥將隨之而自動(dòng)變化。這樣通過(guò)散熱器的流量也隨之變化，這就意味著熱網(wǎng)的流量隨時(shí)都在變化。1熱入口控制閥為自力式流量控制閥自力式流量控制閥的功能是在工況發(fā)生變化時(shí)盡量保持該管路的流量不變。裝溫控閥后管路流量在不斷變化，顯然與自力式流量控制閥的作用相矛盾。如果在裝溫控閥的管路上再裝自力式流量控制閥，對(duì)溫控閥的調(diào)節(jié)作用有害而無(wú)一利。如圖1，當(dāng)室內(nèi)負(fù)荷減少時(shí)，溫控閥自動(dòng)關(guān)小，則相應(yīng)管路流量應(yīng)減少；但如果該管路有自力式流量控制閥，則自力式流量控制閥感知流量減少后會(huì)自動(dòng)開(kāi)大，從而使管路流量增加達(dá)到其保持管路流量不變的目的。
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