本文選題：含鐵酸洗廢液　切入點：打印機墨粉　出處：《中國海洋大學》2015年碩士論文

【摘要】：鋼鐵酸洗液的資源化處理是企業(yè)的一大難題。本文針對含鐵酸洗廢液的特點,采用空氣氧化法研究了制備打印機墨粉用磁粉(Fe_3O_4)的工藝條件。通過綜合處理使之變廢為寶。以FeCl_2、FeSO_4和含鐵酸洗液三種不同原料制備出四氧化三鐵磁性顆粒,采用掃描電鏡、透射電子顯微鏡和粒度分析儀、X射線衍射表征了其形貌和結構。發(fā)現(xiàn),以含鐵酸洗液為原料制備的產(chǎn)品矯頑力低；以FeSO_4為原料制備的Fe_3O_4的形貌和分散性好。探討了影響產(chǎn)品磁性能的因素。研究了原料加入順序、反應溫度、反應pH、堿的種類、反應終點判斷、表面活性劑、N_2、摻雜等因素對產(chǎn)品磁性能的影響；氧化劑種類對產(chǎn)品形貌的影響。研究結果表明：反應pH=7.0、反應溫度為85-90℃、以將7.5 mol/L的NaOH溶液加入到Fe~(2+)溶液中的順序添加反應物為最佳反應條件,在此條件下,當Fe~(3+)/Fe~(2+)=1.99時,結束氧化反應能夠得到純度高、形貌接近球形、磁性數(shù)據(jù)好的Fe_3O_4磁粉微粒：采用N_2保護,有利于提高產(chǎn)品品質；氨水為沉淀劑制備出的Fe_3O_4力高、飽磁低,不如NaOH溶液制備的Fe_3O_4的磁性好；分散劑添加過多會導致顆粒變��；添加Zn可降低產(chǎn)品的矯頑力,添加mol/mol為4%Mn時,可使產(chǎn)品矯頑力降低且抗老化性提高；添加P會使產(chǎn)品品質下降；采用液體氧化劑氧化時產(chǎn)品的粒徑變小。根據(jù)實驗結果,進行了噸級實驗放大,修改完善了部分參數(shù),放大實驗證明本文提出的以鋼鐵酸洗廢液為原料制備打印機墨粉用Fe_3O_4磁粉的工藝可行,不僅使含鐵酸洗液得到了無害化處理,而且得到的產(chǎn)品完全滿足打印機墨粉的各項指標要求。
[Abstract]:The resource treatment of iron and steel acid lotion is a difficult problem for enterprises.According to the characteristics of ferric acid pickling waste liquid, the technological conditions of preparing Fe3O _ 4 for printer toner powder were studied by air oxidation method.To turn waste into treasure by comprehensive treatment.Fe _ 2O _ 3 magnetic particles were prepared from FeCl _ 2 + FeSOD _ 4 and ferric acid washing solution. The morphology and structure of the particles were characterized by scanning electron microscope, transmission electron microscope and particle size analyzer by X-ray diffraction.It was found that the product prepared from ferric acid lotion had low coercivity, and Fe_3O_4 prepared with FeSO_4 as raw material had good morphology and dispersibility.The factors influencing the magnetic properties of the products are discussed.The effects of addition order of raw materials, reaction temperature, pH of reaction, type of alkali, determination of reaction end point, surfactant N _ 2 and doping on the magnetic properties of the product and the influence of oxidant type on the morphology of the product were studied.The results showed that the optimum reaction conditions were as follows: reaction pH = 7.0, reaction temperature 85-90 鈩，

本文編號：1727761