日标方管：一般是选用燃烧性能好的混合煤，适当控制煤粉粒度和富氧以提高煤粉燃烧时的氧过剩系数等来提高煤粉的燃烧速率。流体力学因素。主要是随着喷煤量的增加，料柱中焦炭数量减少，透气性变差，压差△p上升，有可能影响高炉顺行。但是这种限制可以用提高炉顶压力降低实际煤气流速和改善炉料的物理性能来部分地解决。高炉下部软熔带和滴落带的三相区内的炉渣滞留甚至出现液泛是整个喷煤的决定性限制环节。1什么叫喷煤置换比？答：喷吹1kg煤粉能置换出多少焦炭的数值就叫喷煤置换比。
日标方矩管尺寸表：
150x75x6MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (19.34 KG/M)
140x140x5MM (SHS) SQUARE STEEL HOLLOW SECTION (21.10 KG/M)
150x100x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (18.70 KG/M)
140x140x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (26.30 KG/M)
150x100x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (23.30 KG/M)
140x140x8MM (SHS) SQUARE STEEL HOLLOW SECTION (32.90 KG/M)
150x100x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (29.10 KG/M)
140x140x10MM (SHS) SQUARE STEEL HOLLOW SECTION (40.40 KG/M)
150x100x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (35.70 KG/M)
140x140x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (49.50 KG/M)
150x100x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (43.60 KG/M)
150x150x5MM (SHS) SQUARE STEEL HOLLOW SECTION (22.70 KG/M)
160x80x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (18.00 KG/M)
150x150x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (28.30 KG/M)
160x80x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (22.30 KG/M)
150x150x8MM (SHS) SQUARE STEEL HOLLOW SECTION (35.40 KG/M)
160x80x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (27.90 KG/M)
150x150x10MM (SHS) SQUARE STEEL HOLLOW SECTION (43.60 KG/M)
160x80x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (34.20 KG/M)
150x150x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (53.40 KG/M)
200x100x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (22.70 KG/M)
150x150x16MM (SHS) SQUARE STEEL HOLLOW SECTION (66.40 KG/M)
200x100x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (28.30 KG/M)
180x180x5MM (SHS) SQUARE STEEL HOLLOW SECTION (27.40 KG/M)
200x100x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (35.40 KG/M)
日标矩形管参数表：
180x180x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (34.20 KG/M)
200x100x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (43.60 KG/M)
180x180x8MM (SHS) SQUARE STEEL HOLLOW SECTION (43.00 KG/M)
200x100x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (53.40 KG/M)
180x180x10MM (SHS) SQUARE STEEL HOLLOW SECTION (53.00 KG/M)
200x100x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (66.40 KG/M)
180x180x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (65.20 KG/M)
250x150x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (30.50 KG/M)
180x180x16MM (SHS) SQUARE STEEL HOLLOW SECTION (81.40 KG/M)
250x150x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (38.20 KG/M)
200x200x5MM (SHS) SQUARE STEEL HOLLOW SECTION (30.50 KG/M)
250x150x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (48.00 KG/M)
200x200x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (38.20 KG/M)
250x150x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (59.30 KG/M)
200x200x8MM (SHS) SQUARE STEEL HOLLOW SECTION (48.00 KG/M)
250x150x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (73.00 KG/M)
200x200x10MM (SHS) SQUARE STEEL HOLLOW SECTION (59.30 KG/M)
250x150x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (91.50 KG/M)
200x200x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION(73.00 KG/M)
300x200x6.3MM(RHS) RECTANGULAR STEEL HOLLOW SECTION (48.10 KG/M)
200x200x16MM (SHS) SQUARE STEEL HOLLOW SECTION (91.50 KG/M)
300x200x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (60.50 KG/M)
250x250x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (48.10 KG/M)
300x200x10MM(RHS) RECTANGULAR STEEL HOLLOW SECTION (75.00 KG/M)
250x250x8MM (SHS) SQUARE STEEL HOLLOW SECTION (60.50 KG/M)
日标管材重量表：
300x200x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (92.60 KG/M)
250x250x10MM (SHS) SQUARE STEEL HOLLOW SECTION (75.00 KG/M)
300x200x16MM(RHS) RECTANGULAR STEEL HOLLOW SECTION (117.00 KG/M)
250x250x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (92.60 KG/M)
400x200x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (73.10 KG/M)
250x250x16MM (SHS) SQUARE STEEL HOLLOW SECTION (117.00 KG/M)
400x200x10MM(RHS) RECTANGULAR STEEL HOLLOW SECTION (90.70 KG/M)
300x300x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (57.90 KG/M)
400x200x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (112.00 KG/M)
300x300x8MM (SHS) SQUARE STEEL HOLLOW SECTION (73.10 KG/M)
400x200x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (142.00 KG/M)
300x300x10MM (SHS) SQUARE STEEL HOLLOW SECTION (90.70 KG/M)
450x250x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (85.70 KG/M)
300x300x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (112.00 KG/M)
450x250x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (106.00 KG/M)
300x300x16MM (SHS) SQUARE STEEL HOLLOW SECTION (142.00 KG/M)
450x250x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (132.00 KG/M)
350x350x8MM (SHS) SQUARE STEEL HOLLOW SECTION (85.70 KG/M)
450x250x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (167.00 KG/M)
350x350x10MM (SHS) SQUARE STEEL HOLLOW SECTION (106.00 KG/M)
500x200x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (85.70 KG/M)
350x350x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (132.00 KG/M)
500x200x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (106.00 KG/M)
350x350x16MM (SHS) SQUARE STEEL HOLLOW SECTION (167.00 KG/M)
500x200x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (132.00 KG/M)
400x400x10MM (SHS) SQUARE STEEL HOLLOW SECTION (122.00 KG/M)
500x200x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (167.00 KG/M)
400x400x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (152.00 KG/M)
500x300x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (122.00 KG/M)
400x400x16MM (SHS) SQUARE STEEL HOLLOW SECTION (192.00 KG/M)
500x300x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (152.00 KG/M)
500x300x16MM (RHS) RECTANGULAR STEEL
STKR400方矩管：
为了确保喷吹烟煤的安全作业，在制粉、输粉、喷吹等系统都需有严密的气氛保护，必须有温度控制及灭火和防爆装置。而无烟煤则无需气氛保护，温度控制和防爆装置也简单一些。烟煤喷吹设施投资高。烟煤含挥发分高，着火点低，易于燃烧，易于被高炉接受，同样条件下可以扩大喷吹量。烟煤含H2量高，产生的煤气的还原能力强，有利于间接还原的发展。因烟煤一般煤质较软，可磨性比无烟煤好，磨制烟煤时制粉机出力可以提高。
