查询词典 pitch coal

The influence of the temperature, reaction time and air flow on the structure and properties of coal tar pitch was studied.

考察了反应温度、空气氧化时间、空气流量对沥青性质和结构的影响。

We have successfully modified coal tar pitch with divinylbenzene in this paper.

进行了二乙烯基苯改性煤沥青的中间相转化行为研究。

The effect of technologies for processing coal tar on the quality of pitch was analyzed on the basis of comparing different technologies at home and abroad.

摘 要：通过对国内外焦油加工工艺的比较，分析了不同工艺对沥青质量的影响。

According to the source can be divided into coal tar pitch and wood tar asphalt.

根据来源可分为煤焦油沥青和木焦油沥青等。

The company specialized production enrichment plant, provides the technical process, the dressing experiment, the installment instructs the www.lzkysb.cn gentle yu 0797-5745599 chutes, the spiral chute, the glass fiber reinforced plastic spiral chute, the glass fiber reinforced plastic chute, separates by gravity the equipment, the manganese ore flotation process equipment, the copper mine flotation process equipment, the fluorspar flotation process equipment, the spiral chute which the company produces, the glass fiber reinforced plastic spiral chute, the glass fiber reinforced plastic swivel chute, the glass fiber reinforced plastic revolving spiral chute has series BLso on BL, LL, CBX characteristics is the new compound cross section, the ultra short pitch, the large diameter, the wide cross section, is suitable for the undressed ore specially dragging through the mudnonmetallic, metallic minerals thin grade - 0.2 millimeter the separation, does not need the flushing water, has the structure to be simple, does not need the power, the weight is light,The area is small, the process load is big, the separation efficiency is high, LL uses in the classification granularity 0.3-0.02 millimeter iron tin, the tungsten, the tantalum, the niobium, the coal mine, the gold ore, the monacite, the rutile, the zirconhas enough proportion bad other mineral CBX regarding the classification tantalum, the niobium, the tin, the tungsten, the gold, the titanium, hardother proportion difference is bigger than 1 mineral.

公司专业生产选矿设备，提供工艺流程，选矿实验，安装指导www.lzkysb.cn温良禹0797-5745599溜槽，螺旋溜槽，玻璃钢螺旋溜槽，玻璃钢溜槽，重选设备，锰矿浮选设备，铜矿浮选设备，萤石浮选设备，公司生产的螺旋溜槽，玻璃钢螺旋溜槽，玻璃钢旋转溜槽，玻璃钢旋转螺旋溜槽有BL，LL，CBX等系列BL的特点是新型复合断面，超短螺距，大直径，宽断面，特别适于原矿的拖泥及非金属，金属矿物细粒级-0.2毫米的分选，不需冲水，具有结构简单，无需动力，重量轻，占地面积小，处理量大，分选效率高，LL的用于选别粒度0.3-0.02毫米的铁锡，钨，钽，铌，煤矿，金矿，独居石，金红石，锆英石及具有足够比重差的其它矿物CBX对于选别钽，铌，锡，钨，金，钛，铁和其它比重差大于1的矿物。

The results show that coal tar pitch and PMB can be used to synthesize COPNA resin, the reaction mechanism of which is a positive ion-typed condensation polymerization catalyzed by acid. There exist many micro fibers with a uniform distribution in the COPNA resin. The fibers grow with increase of modification time, and then intertwist and amalgamate. Moreover, the COPNA resin possesses good thermo-stability and high coke value.

研究表明煤沥青能与PMB合成COPNA树脂，其反应机理为酸催化下的阳离子型缩聚反应；COPNA树脂的合成中出现很多微纤，随交联聚合程度的加深，微纤相互缠结并融合；COPNA树脂具有很好的耐热性和较高的炭收率。

Therefore, coal tar pitch modified with 4-MB was qualified to be an excellent carbon precursor.

因此，改性后的煤沥青有望作为优质的炭材料基体前驱体。

OBJECTIVE: To study the expressions of Nrf2 and NQO1 mRNA, Nrf2 protein by coal tar pitch extract.

目的： 研究煤焦沥青烟提取物对人肺支气管上皮细胞(BEAS-2B)Nrf2、NQO1 mRNA及Nrf2蛋白表达的影响。

The formulation,production process of epoxy coal tar pitch high build coatings and its application in corrosion protective projects have been describe

介绍了环氧煤沥青厚浆涂料的配方、工艺及其在防腐蚀工程中的应用。

The change in group component of the coal tar pitch road binder modified by tired rubber with reaction time and its modified mechanism were studied.

研究了煤沥青在供氢剂的作用下，族组成随反应时间的变化规律及其受氢改质机理。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。