渣

Recycled aggregate instead of natural macadam and sand is used to make recycled aggregate concrete and one of indexes-the capacity of resisting the freezing and thawing repellence of recycled aggregate concrete's durability with city, garbage melting slag is discussed.

为了研究城市垃圾熔渣细骨料以及废弃混凝土粗骨料再生利用的可能性，着眼于城市垃圾熔渣再生混凝土的耐久性能，试验以100%再生粗骨料以及垃圾熔渣细骨料替代天然碎石和砂子制备再生混凝土，探讨了城市垃圾熔渣再生混凝土的耐久性能之一抵抗冻融循环的能力。

Study on Improvement of Recovery of Gold and Silver from the Copper Dross Smelting in Reverberatory Furnace;2. After that, the copper in leach liquor can be extracted with the ternary extractant mainly containing P204, and the gold and silver in leach residue can be recovered by a process of cyanidation-replacement of Z.

为避免硫酸烧渣对环境的污染，以硫酸烧渣为原料，通过添加活性还原剂，用废硫酸直接还原浸出铁并制铁黄，而后用以P2 0 4为主体的三元萃取剂萃取回收浸液中的铜，用全泥氰化和锌粉置换工艺从浸渣中提取金银，较经济有效地回收利用了烧渣中的有价金属，铁、铜和金的回收率分别达到了 93。

For titania slag the relationship between viscosity and temperature as well as conductivity and time was investigated.

研究了含钛渣的粘度、电导率与温度、渣成分、时间的关系，获得了渣中初始结晶相CaTiO3结晶过程的动力学参数，建立了CaTiO3相的结晶温度与渣碱度之间的关系式。

The results show that the viscosity of primary slag can be increased by more than two times when unburnt coal is entrapped in the slag and increasing pellet ratio is favorable to the improvement of the fluidity of primary slag and the reduction of primary slag.

结果表明，初渣中混入未燃煤粉可使初渣的黏度增大2倍以上，提高球团矿配比对改善初渣流动性和减少初渣量有利。

The slag test showed that β-Sialon bonded MgAION has good slag resistance. The slag corrosion mechanism is as:β-Sialon and MgAION dissolve in slag and crystallized out acerous Sialon and spinel with near sto-icheome-tric composition, and slag penetrated into the body of sample.

通过对β-Sialon复合MsAION材料的抗渣及抗钢水侵蚀性能的研究发现，该材料抗渣侵蚀性能较好，侵蚀机理为β-Sialon与MgAION溶解于渣中并析出针状Sialon和近化学计量的镁铝尖晶石，同时渣向材料内部渗透。

Insure the viscousity increase strain of slag surface, and it can able to avoid adhibit slags, and reduce curdle temperature, increase heat stream, and reduce carbon con-tent as possible.

针对性的确定保护渣的粘度，提高渣、金界面张力，可有效防止粘渣，另外害必须降低保护渣的凝固温度、适当的增加热流、尽量减少自由碳的配入量。

From the analysis of the content of slag, adding CaF2 to the flux would increase the content of calcium and fluorine in the slag. Adding Na3AlF6 to the flux would increase the content of sodium, alumium and fluorine in the slag.

由熔渣成分分析可知，焊药中添加CaF2会增加渣中钙与氟含量，添加Na3AlF6会增加渣中钠、铝与氟含量，添加NaF会增加渣中钠与氟含量。

The movement of the water-cooled mould relative to the ingot is essentia...

同时认为，对于抽锭式重熔过程来讲，结晶器与钢锭之间的相对移动，实际上是接触钢锭表面的渣壳内侧渣璧相对于被拉裂的与结晶器接触的渣壳外侧渣壁的剪切运动。

The process of three-step countercurrentleaching is presented, in the first leaching step Fe as leading impurity inthe matte is leached priorly, Co and Ni are enriched in the residue of thefirst step and then are leached in the second leaching step with a lowconcentration acid, the residue from the second step containing hardleaching Fe, Co and Ni are leached with a high concentration sulfuricacid in the third step, and Cu stays in the final resude, the leachate of thethird leaching step is diluted and divided into two parts as the leachantsto the first and second leaching step.

在此基础上，提出了三段逆流选择性浸出技术：即第一段用低酸优先浸出钴冰铜中杂质铁，将钴镍富集到第一段的浸出渣中，第二段再用低酸浸出渣中部分钴镍，第三段用高酸浸出第二段渣中难浸的钴镍铁，将铜留在最终的浸出渣中，第三段浸出液经稀释，分流，分别返回至第一段，第二段作低酸浸出介质。

MgO-C brick has a good erosion resistance but Al〓O〓-C brick is better. Corrosion mechanism for refractory without carbon is that FeO and oxides of molten slag take place chemical reaction with constituents of refractory and forming low fusing point compounds to be dissolved in molten slag. For those refractory containing graphite carbon is to be decarburized in advance and to form decarburizing layer and metamorphosis layer. The subsequent corrosion is decarburizing and taking chemical reaction to form low fusing point compounds and dissolved in molten slag at the same time.

铁浴中硅和钛的扩散是影响铁浴及熔渣与耐火材料作用的重要因素，耐火材料中添加的TiO〓和SiC受熔渣氧化和侵蚀，将被部分还原形成Si，Ti向铁浴中扩散，Si、Ti在铁浴中的扩散研究结果是： D〓=1.84×10〓exp（－5988.7/T） cm〓/S E〓=49766 J/mol D〓=7.76×10〓exp（－53225.5/T） cm〓/S E〓=442304 J/mol 铁浴式熔融还原熔体对粘土砖，高铝砖，镁砖的侵蚀速度很高，镁碳砖抗侵蚀能力比前几种耐火材料强，但不如铝碳砖；对不含碳耐火材料在熔体中的侵蚀是熔渣中FeO及其它氧化物与耐火材料组分的化学反应形成低熔点物熔蚀进入渣相，产生损毁。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。