橡胶改性HDPE在尾矿矿浆中耐磨蚀性的研究

A STUDY ON EROSION PROTECTION OF A RUBBER MODIFIED HIGH DENSITY POLYETHYLENE TO TAILINGS SLURRY FROM MINE

用自制的旋臂式磨蚀仪，研究了采用ｃｉｓ－１，４聚丁二烯橡胶改性的高密度聚乙烯（ＨＤＰＥ／ｃｉｓ－ＢＲ）在攀枝花尾矿矿浆中的耐磨蚀性。结果表明，在冲击速率（ｖ）为１．５～３．５ｍ／ｓ范围内，该材料的磨蚀速率（ω＿（ＨＤＰＥ／ｃｉｓ－ＢＲ））随ｖ的５．９次方递增。在浆体浓度（Ｃ＿ｗ）≤２０％时，ω＿（ＨＤＰＥ／ｃｉｓ－ＲＲ）随Ｃ＿ｗ线性增加，在Ｃ＿ｗ＞２０％时，增幅减小。ω＿（ＨＤＰＥ／ｃｉｓ－ＢＲ）在冲击角度７５°时达到最大值。在实验范围内，ω＿（ＨＤＰＥ／ｃｉｓ－ＢＲ）为未改性高密度聚乙烯腐蚀速率的６０％～９０％，为４５钢磨蚀速率的０．５％～１７．０％。

The impact erosion resistance to tailiilgs slurry from Panzhihua iron mine of a cis-1,4 polybutadiene modified high density polyethylene(HDPE/cis-BR)was studied through an erosive set up with six whirling arms. The experimental results show that the erosive rate(ω_(HDPE/cis-BR)) of the material increases with impact velocity(v)to the 5.9 th power in the v range of 1.5￣3.5m/s. W_(HDPE/cis-BR) increases with concentration of slurry(C_w) proportionally when Cw≤20%and less rapidly when C_w>20%, ω_(HDPE/cis-BR)reaches its maxium value at 75°impact angle.The ratios ofω_(HDPE/cis-BR) to erosive rates of unmodified HDPE and steel 45￣# are 60%￣92% and 0.5%￣17.0%respectively,varying with erosive conditions.