20春学期《现代冶金学》在线平时作业1

adminhan

由于结晶器四壁冷却不均匀，形成<span class="GramE">的坯壳厚度</span>不均匀，引起收缩不均匀，这一系列的不均匀导致了铸坯的（<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">）</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">鼓肚变形</span>
B:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">圆铸坯变形</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
C:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">菱形变形</span>

在低镍锍吹炼生产上为了使渣含镍降低，镍锍含铁吹到不低于（<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">）便<span class="GramE">放渣并</span>接收新的一批镍锍，如此反复进行，直到炉内具有足够数量的富镍锍时，进行筛炉操作，获得含镍</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">45</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">％～</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">50</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">％的高镍锍。</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><o:p></o:p></span>
A:15%<span style="mso-spacerun: yes">&nbsp; </span>
B:<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">20%<span style="mso-spacerun: yes">&nbsp;</span></span>
C:<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">25%<span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
D:<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">30%<o:p></o:p></span>

英国人（<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">）提出了</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">&ldquo;</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">负滑脱</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">&rdquo;</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">概念，这有改善润滑、减轻粘结的优点，更便于实现高速浇铸。</span><span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span>
A:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">皮尔逊</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;</span></span>
B:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">亚<span class="GramE">瑟</span></span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;</span></span>
C:<span class="GramE"><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">容汉斯</span></span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
D:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">哈里德</span>

<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">200</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">&times;</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">200~450</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">&times;</span><st1:chmetcnv style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x" tabindex="" w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="450" unitname="mm"><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">450mm</span></st1:chmetcnv>^{<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">2</span>}<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">的铸坯断面属于（</span><span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">）</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">小方坯</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span>
B:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">大方坯</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
C:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">矩形<span class="GramE">坯</span></span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;</span></span>
D:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: PT-BR">板坯</span>

在铸坯的断面上分布有细微的孔隙，这些孔隙称为疏松。分散分布于整个断面的孔隙称为（<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">）</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></span>
A:<span class="GramE"><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">枝晶疏松</span></span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
B:&nbsp;<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">一般疏松</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
C:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">中心疏松</span>

<span style="mso-bidi-font-weight: bold">喷吹钢包中驱动金属流动的外力主要是（</span><span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"> </span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">）力。</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">气泡浮力</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
B:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">粘性力</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span>
C:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">重力</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
D:&nbsp;<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">惯性力</span>

铸坯在二冷区传热的方式有（<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">）</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">辐射</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span>
B:&nbsp;<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">对流</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;</span></span>
C:&nbsp;<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">传导</span>
D:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">水的蒸发</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
E:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">水的加热</span>

硫化镍精矿闪速造<span class="GramE">锍</span>熔炼过程控制，包括那几个方面（<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">）。</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">合理的料比</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp; </span></span>
B:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">镍锍温度的控制</span><span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"> </span>
C:氧化气氛的控制<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp; </span><o:p></o:p></span>
D:<span class="GramE">渣型</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">Fe/SiO₂</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">的控制</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;</span></span>
E:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">熔炼时间的控制</span>
F:镍锍品位的控制

下列属于减少铸坯鼓肚应采取措施的有（<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">）</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">降低连铸机的高度</span>
B:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">二冷区采用小<span class="GramE">辊距密</span>排列</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;</span></span>
C:<span class="GramE"><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">支撑辊要严格</span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">对中</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
D:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">减小二冷区冷却强度</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span>
E:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">防止支撑辊的变形，板坯的支撑<span class="GramE">辊</span>最好选用多节辊。</span>

工业铝酸钠溶液中的<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US">Na₂O</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，以（</span><span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）形态存在。</span><span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US"><o:p></o:p></span>
A:<span style="mso-bidi-font-weight: bold" lang="EN-US">Na₂SiO₄ </span>
B:<span style="mso-spacerun: yes">&nbsp;</span><span class="SpellE"><span lang="EN-US">NaOH</span></span><span style="mso-bidi-font-weight: bold" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span></span>
C:<span style="mso-bidi-font-weight: bold; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US">Al(OH)₃&nbsp;</span><span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span><span style="mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;</span></span></span>
D:<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US">Na₂SO₄</span>
E:<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US">Na₂CO₃</span>
F:<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US">NaAlO_{2<span style="mso-bidi-font-weight: bold"> </span>}<span style="mso-bidi-font-weight: bold"><o:p></o:p></span></span>

<span style="mso-bidi-font-weight: bold">拜耳法生产氧化铝工艺中</span>影响铝土矿溶出过程的主要因素<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US"><o:p></o:p></span>
A:溶出温度
B:循环母液碱浓度和<span class="GramE">苛</span>性比
C:<p>矿石粒度</p>
D:搅拌强度
E:石灰添加量<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span><o:p></o:p></span>

<span style="mso-bidi-font-weight: bold">有利于铁水预处理脱硅的因素有（</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">）</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">低温</span>
B:&nbsp;<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">高温</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;</span></span>
C:&nbsp;<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">较低的</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">SiO₂</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">活度</span>
D:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">较高的</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">SiO₂</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">活度</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;</span></span>
E:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">较低的</span><span class="SpellE"><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">FeO</span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">活度</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;</span></span>
F:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">较高的</span><span class="SpellE"><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">FeO</span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">活度</span>

钢种的高温脆性曲线来考虑上，下列属于高温区（从液相线以下<st1:chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="50" unitname="℃" w:st="on"><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">50</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">℃</span></st1:chmetcnv><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">到</span><st1:chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="1300" unitname="℃" w:st="on"><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">1300</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">℃</span></st1:chmetcnv><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">）特性的是（</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">）</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">处于<span class="GramE">奥氏体相区</span></span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
B:<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">钢的延伸率在</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">0.2%~0.4%<span style="mso-spacerun: yes">&nbsp;</span></span>
C:&nbsp;<span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">强度为</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">1~3MPa<span style="mso-spacerun: yes">&nbsp; </span></span>

<span style="mso-bidi-font-weight: bold">烧结法生产氧化铝的工序包括：</span>
A:生料浆的制备
B:熟料烧结
C:料溶出
D:铝酸钠溶液脱硅
E:分解制备氧化铝

<span style="mso-bidi-font-weight: bold">气体吹氩搅拌精炼法中，顶吹<span class="GramE">氩</span>搅拌效果比<span class="GramE">底吹氩</span>好。</span><span style="mso-bidi-font-weight: bold; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span>
A:错误
B:正确

保护渣在结晶器钢液面上<span class="GramE">形成液渣层</span>，由于结晶器振动，<span class="GramE">液渣从</span>弯月面渗漏<span class="GramE">到坯壳与</span>铜板之间气隙处，形成<span class="GramE">均匀渣</span>膜，既起润滑作用，又改善传热。
A:错误
B:正确

世界上<span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">95</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'">％以上的氧化铝是用高岭石生产的。</span>
A:错误
B:正确

磷<span style="mso-bidi-font-weight: bold">对钢的性能会造成不良影响，钢中磷含量高，会使钢的热加工性能变坏，即造成钢的</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">&ldquo;</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">热脆</span><span lang="EN-US" style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">&rdquo;</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">性。</span>
A:错误
B:正确

有色金属的电化学冶金工艺可分为可溶性阳极电解与<span class="GramE">不</span>可溶性阳极电解。<span style="mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold"> </span>
A:错误
B:正确

负滑脱时间是指结晶器向下振动，速度超过拉速的那一段时间。
A:错误
B:正确