日标方矩管：两种煤对置换比的影响不完全一样，无烟煤含碳高，需补偿热少是有利因素；烟煤含H2高、总热量高也是有利因素。但决定置换比高低的主要因素是灰分，所以要以灰分的高低来综合评价。1限制喷煤量的因素是哪些？答：限制喷煤量的因素主要是：炉缸热状态、煤粉燃烧速率和流体力学3个方面。。限制性因素是t理的下降，因为任何高炉炼铁过程都存在一个允许的t理，它至少应高于液体产品温度，允许的煤气温度应能保证液体渣铁的过热，高温吸热反应的进行。
日标矩形管尺寸表：
20x20x2MM (SHS) SQUARE STEEL HOLLOW SECTION (1.12 KG/M)
40x25x2MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (1.83 KG/M)
20x20x2.5MM (SHS) SQUARE STEEL HOLLOW SECTION (1.35 KG/M)
40x25x2.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (2.23 KG/M)
25x25x2MM (SHS) SQUARE STEEL HOLLOW SECTION (1.43 KG/M)
50x20x2MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (1.96 KG/M)
25x25x2.5MM (SHS) SQUARE STEEL HOLLOW SECTION (1.74 KG/M)
50x25x2.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (2.62 KG/M)
25x25x3MM (SHS) SQUARE STEEL HOLLOW SECTION (2.04 KG/M)
50x25x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (3.07 KG/M)
30x30x2MM (SHS) SQUARE STEEL HOLLOW SECTION (1.68 KG/M)
50x30x2.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (2.92 KG/M)
30x30x2.5MM (SHS) SQUARE STEEL HOLLOW SECTION (2.14 KG/M)
50x30x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (3.45 KG/M)
30x30x3MM (SHS) SQUARE STEEL HOLLOW SECTION (2.51 KG/M)
50x40x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (3.77 KG/M)
40x40x2MM (SHS) SQUARE STEEL HOLLOW SECTION (2.31 KG/M)
60x30x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (3.77 KG/M)
日标方矩型管理重表：
80x40x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (12.80 KG/M)
70x70x3MM (SHS) SQUARE STEEL HOLLOW SECTION (6.28 KG/M)
80x50x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (5.66 KG/M)
70x70x3.6MM (SHS) SQUARE STEEL HOLLOW SECTION (7.46 KG/M)
80x50x4MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (7.34 KG/M)
70x70x5MM (SHS) SQUARE STEEL HOLLOW SECTION (10.11 KG/M)
90x50x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (6.13 KG/M)
70x70x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (12.50 KG/M)
90x50x3.6MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (7.24 KG/M)
70x70x8MM (SHS) SQUARE STEEL HOLLOW SECTION (15.30 KG/M)
90x50x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (9.70 KG/M)
80x80x3MM (SHS) SQUARE STEEL HOLLOW SECTION (7.22 KG/M)
100x50x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (6.60 KG/M)
80x80x3.6MM (SHS) SQUARE STEEL HOLLOW SECTION (8.59 KG/M)
100x50x4MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (8.86 KG/M)
80x80x5MM (SHS) SQUARE STEEL HOLLOW SECTION (11.70 KG/M)
100x50x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (10.90 KG/M)
80x80x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (14.40 KG/M)
100x50x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (13.40 KG/M)
80x80x8MM (SHS) SQUARE STEEL HOLLOW SECTION (17.80 KG/M)
100x50x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (16.60 KG/M)
90x90x3.6MM (SHS) SQUARE STEEL HOLLOW SECTION (9.72 KG/M)
100x60x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (7.22 KG/M)
90x90x5MM (SHS) SQUARE STEEL HOLLOW SECTION (13.30 KG/M)
100x60x3.6MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (8.59 KG/M)
90x90x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (16.40 KG/M)
100x60x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (11.70 KG/M)
日标方矩管理论重量表：
100x60x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (14.40 KG/M)
100x100x3MM (SHS) SQUARE STEEL HOLLOW SECTION (8.69 KG/M)
100x60x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (17.80 KG/M)
100x100x4MM (SHS) SQUARE STEEL HOLLOW SECTION (12.00 KG/M)
120x60x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (8.01 KG/M)
100x100x5MM (SHS) SQUARE STEEL HOLLOW SECTION (14.80 KG/M)
120x60x3.6MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (9.72 KG/M)
100x100x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (18.40 KG/M)
120x60x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (13.30 KG/M)
100x100x8MM (SHS) SQUARE STEEL HOLLOW SECTION (22.90 KG/M)
120x60x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (16.40 KG/M)
100x100x10MM (SHS) SQUARE STEEL HOLLOW SECTION (27.90 KG/M)
120x80x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (14.80 KG/M)
120x120x5MM (SHS) SQUARE STEEL HOLLOW SECTION (18.00 KG/M)
120x80x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (18.40 KG/M)
120x120x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (22.30 KG/M)
120x80x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (22.9 KG/M)
120x120x8MM (SHS) SQUARE STEEL HOLLOW SECTION (27.90 KG/M)
120x80x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (27.9 KG/M)
120x120x10MM (SHS) SQUARE STEEL HOLLOW SECTION (34.20 KG/M)
150x75x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (16.37 KG/M)
120x120x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (41.60 KG/M)
日标型钢：
E尾矿处理密地选矿厂马家田尾矿库位于金沙江南岸山谷之中，与厂相距2km，尾矿坝等级Ⅱ级，七级地震烈度设防，属山谷型，设计总坝高21m，汇水面积18.72km2，总贮量2.2x18m3，采用坝前均匀放矿，筑坝用冲积筑坝法。8年子坝筑至第21道，该子坝标高1233m。尾矿坝占地面积3.5km2。F选矿厂主要设备G近年主要技术经济指标H选矿厂供水选矿厂每吨原矿耗水量在7.73m3左右，新水单耗.72m3，废水重复利用率达到95%左右，尾矿库回水利用率达到55%~75%。钛生产工艺及流程A原则生产工艺流程从选铁磁选尾矿中生产钛铁矿精矿和含钴硫化物精矿的原则生产流程由磁尾浓缩分级作业、粗粒级重选—电选、细粒级强磁—浮选相组合的联合流程构成，选钛生产年处理含Ti28%~9%的选铁磁选尾矿约71万吨，年产钛精矿约25万吨。选钛生产技术指标为:钛精矿Ti247%，S.2%，选钛回收率2%左右;硫钴精矿S32%，Co.25%～.3%。B现存问题及对策当前选钛生产的突出问题是钛回收率不理想，仅为2%左右，主要是细粒级，特别是-.19mm粒级钛铁矿的回收率亟待提高。
