芯科技，芯創(chuàng)新；氣體真空傳感器，DG120IG-9，84447064
但無論是哪種方法都具有一定的局限性，具體表現(xiàn)在：轉(zhuǎn)爐煉鋼時(shí)的回硫現(xiàn)象削弱了鐵水預(yù)脫硫的實(shí)際效果；攪拌器或噴槍會(huì)污染鐵水；鐵損較大。對(duì)于超低硫鋼生產(chǎn)，在鐵水預(yù)處理和轉(zhuǎn)爐冶煉的基礎(chǔ)上，還需要進(jìn)行鋼水二次深脫硫，方法主要有LF攪拌脫硫、RH噴粉脫硫、鋼包噴粉脫硫。二次精煉的噴粉裝置按載具與鋼水的接觸方式可簡(jiǎn)單分為兩類，一類為直接接觸型，如SL、TN、KIP、V-KIP、VOD-PRH-PB等，即噴槍插入鋼液中與液體接觸；另一種是非接觸式如RH-PTB，噴槍不與鋼液接觸。
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Balluff Photoelectric Emitter BLS 65K-1-G50-1
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一個(gè)有效節(jié)能的供熱系統(tǒng)都配有相應(yīng)的調(diào)節(jié)控制設(shè)備，如自力式流量、壓差控制閥等。隨著供熱計(jì)量收費(fèi)體制的改革，室內(nèi)供暖系統(tǒng)裝配溫控閥后熱網(wǎng)如何正確配備控制設(shè)備是非常重要的。本文論述了裝配溫控閥前后系統(tǒng)的特性變化，指出了與溫控閥正確配備的控制設(shè)備，對(duì)設(shè)計(jì)和改造有指導(dǎo)意義。隨著熱量計(jì)量收費(fèi)體制的改革，每個(gè)散熱器上都開始安裝溫控閥。所以供暖運(yùn)行中隨著用戶對(duì)溫控閥的不斷調(diào)節(jié)，熱網(wǎng)流量不斷變化。這樣熱網(wǎng)成為變流量運(yùn)行，流量調(diào)節(jié)的主動(dòng)權(quán)掌握在用戶手中，而且熱力公司將無法預(yù)知和控制流量的變化。
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