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style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">是常見的一種無機化合物，無論是重質碳酸鈣還是輕質碳酸鈣，都是塑料、橡膠、造紙等工業(yè)中使用數(shù)量最大、應用面最廣的粉體填料。但兩者的制備方法不同，由此也導致了粉體特性和應用領域的差異化。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體"><br/></span></span></p><p style="text-align: center;"><img src="/static/upload/image/20220307/1646635931187444.jpg"/></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:Calibri">1</span><span style="font-family:宋體">、生產(chǎn)工藝</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">沉淀碳酸鈣，包括輕質碳酸鈣和納米鈣，一般以石灰石為原料，經(jīng)煅燒、消化、碳化、分離、干燥、分級、包裝等工序制備。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">研磨碳酸鈣，簡稱重鈣（下文統(tǒng)稱重鈣），是用機械方法直接粉碎天然的方解石、石灰石、白堊、貝殼等制得。主要工序包括粉碎、超細粉碎、分級和表面改性。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:Calibri">2</span><span style="font-family:宋體">、礦物經(jīng)濟學比較</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">粉體制備成本：常規(guī)成本相當，處于同一競爭水平，但若附加環(huán)境管制成本和資源浪費率，輕鈣擴展成本則高于重質碳酸鈣。所以，如果條件允許，選擇重鈣更加經(jīng)濟便宜。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">環(huán)境平衡度：重鈣生產(chǎn)除噪聲外，無</span>“三廢”排放，環(huán)境易協(xié)調和管制；輕鈣生產(chǎn)排放“三廢”，特別有燃燒廢氣，環(huán)境總平衡度低。</span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">資源利用率：重鈣易于礦產(chǎn)資源綜合利用，輕鈣憑借化學加工能力，不易控制礦產(chǎn)資源合理利用率。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:Calibri">3</span><span style="font-family:宋體">、工業(yè)應用影響因子</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">味道</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">輕鈣多因氧化鈣反應不完全，殘留有石灰味道。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">食品行業(yè)做添加劑（如填充餅干），則會有嗆人的味道，而重鈣沒有。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">酸堿度</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">重鈣的</span><span style="font-family:Calibri">pH</span><span style="font-family:宋體">值為</span><span style="font-family:Calibri">8-9</span><span style="font-family:宋體">；</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">輕鈣的</span><span style="font-family:Calibri">pH</span><span style="font-family:宋體">值為</span><span style="font-family:Calibri">9-10</span><span style="font-family:宋體">；</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">粒度</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">重鈣粉體顆粒形狀不規(guī)則，有棱角，表面粗糙，粒徑較大，分布較寬。一般方解石粉體為六方晶型、大理石粉體為立方晶型，主要與產(chǎn)地有關。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">輕鈣粉體顆粒形狀規(guī)則，可視為單分散粉體，粒度分布較窄。根據(jù)晶粒形狀的不同，輕鈣可分為紡錘形、方形、菱形、球形等。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體"><br/></span></span></p><p style="text-align: center;"><img src="/static/upload/image/20220307/1646635931110825.jpg"/></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">密度</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">工業(yè)上常通過沉降體積的不同來初步判斷輕鈣、重鈣和納米碳酸鈣。沉降體積越大說明產(chǎn)品粒度越小、密度越輕、檔次越高。重鈣的沉降體積為</span><span style="font-family:Calibri">1.1</span><span style="font-family:宋體">～</span><span style="font-family:Calibri">1.4ml/g</span><span style="font-family:宋體">，輕鈣的沉降體積為</span><span style="font-family:Calibri">2.4</span><span style="font-family:宋體">～</span><span style="font-family:Calibri">2.8ml/g</span><span style="font-family:宋體">，納米碳酸鈣的沉降體積為</span><span style="font-family:Calibri">3.0</span><span style="font-family:宋體">～</span><span style="font-family:Calibri">4.0ml/g</span><span style="font-family:宋體">。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">白度</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">重鈣產(chǎn)品一般通過物理粉碎研磨制得，雜質相對較多，白度一般為</span><span style="font-family:Calibri">89%</span><span style="font-family:宋體">～</span><span style="font-family:Calibri">93%</span><span style="font-family:宋體">；輕鈣由化學合成，純度很高，百度多為</span><span style="font-family:Calibri">92%</span><span style="font-family:宋體">～</span><span style="font-family:Calibri">95%</span><span style="font-family:宋體">。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">含水量</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">重鈣水分一般為</span><span style="font-family:Calibri">0.2%</span><span style="font-family:宋體">～</span><span style="font-family:Calibri">0.3%</span><span style="font-family:宋體">，水分含量比較低同時也較為穩(wěn)定；</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">輕鈣水分一般為</span><span style="font-family:Calibri">0.3%</span><span style="font-family:宋體">～</span><span style="font-family:Calibri">0.8%</span><span style="font-family:宋體">，有時會有一定的波動不太穩(wěn)定。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">吸油值</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">重鈣由于顆粒大、表面光潔、比表面積小，因此吸油值較低，一般為</span><span style="font-family:Calibri">40-60mL/100g</span><span style="font-family:宋體">左右；</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">輕鈣顆粒微細、表面較粗糙，比表面積大，因此吸油值較高，一般為</span><span style="font-family:Calibri">60-90mL/100g</span><span style="font-family:宋體">左右。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">流動性</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">輕鈣的微觀結構為紡錘形狀，加上自身吸油值較大，可以將配方中促進流動的組分如潤滑劑、增塑劑、偶聯(lián)劑、分散劑等吸收，所以流動性不如重鈣好。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:Calibri">4</span><span style="font-family:宋體">、小結和應用分析</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">重鈣主要用于造紙、橡膠和塑料等行業(yè)，填充量一般較大，主要作為體積填料，降低產(chǎn)品的制造成本；</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">輕鈣相對應用領域較廣泛，如塑料、橡膠、涂料、膠黏劑、卷煙紙、油墨等，以體積填充為主。</span></span></p><p style="text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">從經(jīng)濟、環(huán)保等角度出發(fā)，研磨碳酸鈣替代沉淀碳酸鈣一直都是行業(yè)發(fā)展大趨勢，但在實際應用中，往往兩者為互補關系，特定領域沉淀碳酸鈣更是存在不可替代性。因此，更深入地了解兩者之間的差異，才能更針對性的在應用端實現(xiàn)研磨碳酸鈣更大范圍更大比例替代沉淀碳酸鈣。</span></span></p><p style="margin-left:15px;text-align:left"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">上?？评鹂藱C器有限公司歡迎大家來我公司考察立式磨粉機設備。我們的咨詢電話：</span><span style="font-size: 14px; font-family: Calibri; color: 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