云南某残坡积红土风化钛砂矿工艺矿物学特征及生产建议

对云南某典型的残坡积红土风化钛砂矿选厂工艺及指标进行考查,然后对原矿进行了详细的工艺矿物学研究;对原矿进行了试验研究,结合生产实际,提出合理建议;为提高选厂指标,最大化的回收资源提供依据。     

重选-磁选-反浮选回收某铁尾矿中的铁、硫试验研究

研究了某尾矿的工艺矿物学性质及回收铁精矿、硫精矿的工艺流程。通过采用螺旋溜槽预富集-磨矿-弱磁选-强磁选-浮选硫-反浮选硅工艺回收铁精矿、硫精矿,获得的铁精矿TFe62．58％、回收率32．63％,硫精矿S品位37．57％。     

Effect of the cross-section shape of rotating chute on particle flow and burden distribution during the charging process of bell-less top blast furnace with two parallel hoppers

To investigate the effects of the cross-section shape of rotating chute on the burden distribution of stock surface, the motion of particles during the charging process of blast furnace using two different types of rotating chute was calculated by discrete element method. The calculation result shows that the particle velocity at the outlet of the rectangular rotating chute is smaller than that at the outlet of the semi-circular rotating chute, and the heap apex of stock surface is closer to the centre of blast furnace when the rectangular rotating chute is used. The deviation of burden total volume distribution in the circumferential direction of stock surface when the burden is charged by the rectangular rotating chute and the semi-circular rotating chute is 0.075 and 0.126, respectively. It can be concluded that the rectangular rotating chute is beneficial for the uniform circumferential burden distribution.     

Effect of Chute Rotation on Particles Movement for Bell-less Top Blast Furnace

For the bell-less top blast furnace, when particles move along the chute, the particles motion direction and the frictional force acting on them will change due to the chute rotation, which consequently influences the velocity at the tip of chute, changes the burden flow width and impact point, and finally affects the stock profile and gas flow distribution. So the influence of chute rotation needs to be considered when calculating the burden trajectory with a mathematical model. The mathematical model was established to analyze the influence of Coriolis force on particle velocity at chute tip as well as height and width of burden flow in chute, and to summarize the effect of Coriolis force on burden distribution, thereby making the calculation result more accurate.     

半自磨机给矿料小车溜槽衬板的改进研究

给料小车是φ10.37×5.19M半自磨机重要组成部分,给料小车溜槽衬板的使用寿命直接影响半自磨机的运转率,延长溜槽衬板的使用寿命是非常必要的。通过对目前使用的衬板材质、运动轨迹和和磨损程度的分析与研究,对新衬板从材质、安装方式及易磨损部位加以改进,完善热处理工艺,从而达到理想效果。     

沉积型硅钙质磷矿石重选预先富集试验研究

以沉积型硅钙质磷矿石为研究对象,分别采用摇床和溜槽进行预先富集试验,经过系统的条件试验,确定摇床的适宜工艺条件为矿浆浓度20％,床面倾角40,冲洗水量4L／min;溜槽的适宜工艺条件为矿浆浓度20％,冲洗水量3．0L／min。结果表明,溜槽选别效果较好,在原矿P2O5品位25．80％,SiO2品位15．82％最终精矿P2O5品位28．24％,SiO2品位12．75％,回收率85．19％。     

旋转螺旋溜槽在细粒难选矿石及尾矿再选中的应用

总结旋转螺旋溜槽在钨、锡、钽铌、黄金等细粒难选矿石及尾矿再选工艺中的应用,并通过与常规重选设备选矿效果的比较,阐述其选矿特点。     

减震防磨损溜槽在山东京杭水铁联运中的应用

溜槽作为煤炭运输中连接运输设备和储煤设施的重要部件，其设计的合理性直接影响到整个生产系统。尤其落差大的溜槽在使用过程中，不仅噪声大，磨损快，而且还会对下一级胶带冲击很大。实际生产中，溜槽维护成本高，严重影响煤炭运输正常作业。结合山东京杭水铁联运项目中溜槽运量大、落差高的特点，阐述了常用的防冲击、减震防磨损的方法以及在实际使用中的优缺点。并结合设计经验，提出了新的应用设计，通过计算机头落煤曲线，得出机头溜槽物料大概落煤点，设计堆煤网格，形成集料槽；在溜槽底板设置阻尼层，并用螺栓固定，起到缓冲减震降噪的作用。同时也起到了保护下一级胶带和落煤点缓冲托辊的作用。     

含Nb、W高铬铸铁溜槽衬板的研制

针对炼铁高炉布料溜槽衬板耐磨损和耐中（高）温的性能要求,对材料的化学成分、力学性能及显微组织进行了分析探讨,研制生产出含Nb、W高铬铸铁溜槽衬板,通过规范热处理,使材料硬度〉63HRC,冲击韧度aK〉24J／cm^2。与Cr20MoNi和Cr26MoNi相比,其晶粒细化,基体和共晶碳化物显微硬度明显提高,且高温组织稳定性和红硬性更好。     

高炉矿槽除尘无尘卸灰技术的实践与应用

高炉除尘灰回收处理一般经加湿机加湿搅拌后直接卸至敞篷式汽车,再外运至烧结系统作原料用。日常卸灰中,因受操作水平、加湿水、汽车运输等因素制约,难免会出现二次扬尘,而通过罐车无尘吸灰技术进行矿槽除尘灰卸灰处理,可彻底解决卸灰二次扬尘问题。