(?)　(?)永(Yong)磁(Ci)筒(Tong)是(Shi)永(Yong)磁(Ci)除(Chu)铁(Tie)器(Qi)的(De)一(Yi)种(Zhong)，(?)主(Zhu)要(Yao)用(Yong)于(Yu)去(Qu)除(Chu)干(Gan)粉(Fen)状(Zhuang)物(Wu)料(Liao)、(?)颗(Ke)粒(Li)物(Wu)料(Liao)中(Zhong)的(De)铁(Tie)杂(Za)质(Zhi)，(?)广(Guang)泛(Fan)应(Ying)用(Yong)于(Yu)食(Shi)品(Pin)加(Jia)工(Gong)、(?)粮(Liang)食(Shi)加(Jia)工(Gong)、(?)饲(Si)料(Liao)加(Jia)工(Gong)和(He)精(Jing)细(Xi)化(Hua)工(Gong)行(Xing)业(Ye)。(?)

　(?)　(?)因(Yin)永(Yong)磁(Ci)筒(Tong)设(She)计(Ji)科(Ke)学(Xue)，(?)除(Chu)铁(Tie)效(Xiao)果(Guo)明(Ming)显(Xian)，(?)是(Shi)较(Jiao)早(Zao)应(Ying)用(Yong)的(De)永(Yong)磁(Ci)除(Chu)铁(Tie)器(Qi)。(?)永(Yong)磁(Ci)筒(Tong)外(Wai)壳(Ke)由(You)不(Bu)锈(Xiu)钢(Gang)或(Huo)碳(Tan)钢(Gang)制(Zhi)成(Cheng)，(?)磁(Ci)芯(Xin)表(Biao)面(Mian)是(Shi)不(Bu)锈(Xiu)钢(Gang)，(?)内(Nei)部(Bu)是(Shi)永(Yong)磁(Ci)铁(Tie)。(?)制(Zhi)作(Zuo)永(Yong)磁(Ci)筒(Tong)磁(Ci)芯(Xin)的(De)永(Yong)磁(Ci)铁(Tie)通(Tong)常(Chang)是(Shi)铁(Tie)氧(Yang)体(Ti)永(Yong)磁(Ci)铁(Tie)和(He)钕(Nǖ)铁(Tie)硼(Peng)永(Yong)磁(Ci)铁(Tie)，(?)根(Gen)据(Ju)使(Shi)用(Yong)要(Yao)求(Qiu)，(?)选(Xuan)择(Ze)对(Dui)应(Ying)品(Pin)种(Zhong)和(He)牌(Pai)号(Hao)的(De)永(Yong)磁(Ci)体(Ti)材(Cai)料(Liao)。(?)