共查询到20条相似文献,搜索用时 272 毫秒
1.
2.
我公司是新疆天业(集团)有限公司响应国家循环经济理念,于2005年投资筹建的1 000t/d水泥熟料生产线。该项目作为集团公司国家循环经济的重要链环项目,以天业化工有限公司20万t聚氯乙烯配套的生产线所产生的电石渣100%替代石灰石作钙质原料,年可消化和利用各类工业废弃物45万t(电石渣、粉煤灰、石灰粉末、硫酸渣、炉渣、铜渣、柠檬酸渣、脱硫石膏和电石炉收尘灰等)。我公司利用该生产线采用100%电石渣成功地煅烧出合格的高抗硫酸盐硅酸盐水泥熟料,熟料经过新疆自治区建材质检站的检测,各项指标均符合GB748-2005《抗硫酸盐硅酸盐水泥》标准要求,打破了利用电石渣生产水泥品种单一的格局,向多元化生产迈进了一大步。 相似文献
3.
4.
(1)生产工艺。采用湿磨工艺粉磨黄砂、粉煤灰、炉渣、石灰渣、硫酸渣5种原料(其中后4种均为工业废渣)制成料浆,再与电石渣浆(水分高达60%~70%,0.08mm筛余为18%,其中80%颗粒在0~45μm之间)按体积配比配制成生料浆。然后,将生料浆经机械压滤脱水至25%~29%后,利用窑尾废气进行烘干破碎后入干法中空窑煅烧成水泥熟料。最后再掺入适量粉煤灰、电石灰、柠檬酸渣粉磨制成水泥(强度达49.6MPa)。其中熟料率值及硅酸盐矿物含量控制为:KH=0.90~0.95,SM=1.95~2.30,IM=1.1~1.4.w(C3S+C2S)〉75%:生产用原料(其中7种为工业废渣)的化学成分见表1。 相似文献
5.
油页岩低温干馏制取页岩油,其干馏产生的干馏渣和硅铝质原料(煤矸石)的化学成分相近并含有一定发热量。基于此,某新型干法生产线利用干馏渣替代部分硅铝质原料(烧煤矸石、黏土)用于水泥生料配料生产水泥熟料,介绍了其生产操作调整措施。实践证明,干馏渣替代部分硅铝质原料生产水泥是切实可行的,不仅能改善生料易烧性且价格低廉,降低了熟料煤耗和生产成本,具有广阔的市场应用前景。 相似文献
6.
经过多次生产调整,我厂用铅锌渣代替铁矿石和萤石配料的生料化学成分及率值见表4。 掺有铅锌渣的生料试烧时表现为生料的易烧性较好且熟料烧结好、热耗低、窑内烟气上升有力,结窑现象减少;水泥初终凝时间则略有提前;熟料和水泥强度高,且后期强度增长大;熟料产、质量也有所提高。掺铅锌渣前后熟料性能和水泥性能对比分别见表5、表6。 由表5、表6可看出: (l)用铅锌渣配料生产的熟料及水泥强度高,尤其是后期强度增长较大; (2)铅锌渣配料的水泥凝结时间均有提前,其中初凝提前约 0. sh,终凝提前约 50min; (3)… 相似文献
7.
为降低生产成本,提高企业经济效益,西昌航天水泥有限责任公司对磷渣配料生产水泥熟料进行了试生产,试生产中磷渣的掺入量定为6.0%,熟料三率值定为:KH=0.92±0.02,SM=2.7±0.1,IM=1.6±0.1。试生产成功后实施了全面生产,生产中配料方案和熟料三率值基本不变,磷渣掺入量通过摸索定为5.0%。结果表明,在生料中掺入一定比例的磷渣,可以降低生产成本,提高熟料质量,获得较好的经济效益和社会效益。 相似文献
8.
9.
随着新型干法水泥生产技术快速发展和“双碳”政策背景下行业对于替代原料和各类校正材料的广泛应用,很多水泥企业在校正原料选择上进行了探索实践。2021年山东鲁碧公司4 800 t/d熟料生产线采用的是石灰石、砂岩、煤矸石、硫酸渣与钢渣五组份,主要化学成分见表1。由于铁质校正材料供应短缺和运输成本升高等条件限制,为做好原材料保供工作,公司新进一批铁矿尾渣待用,为了检验铁矿尾渣配料的易烧性及其对熟料质量的影响,对此铁矿尾渣进行了试验。 相似文献
10.
11.
天山股份塔里木分公司为保质保量、按期满足库尔勒机场扩建工程对低碱抗硫型道路水泥的需求,打破以前在湿法窑上生产这种水泥熟料的常规,利用干法窑的技术优势生产该特种水泥熟料,获得了优质高产的效果。 相似文献
12.
13.
14.
Göril Möschner Barbara Lothenbach Ruben Kretzschmar 《Cement and Concrete Research》2009,39(4):275-282
Citric acid can be used to retard the hydration of cement. Experiments were carried out to investigate the influence of citric acid on the composition of solid and liquid phases during cement hydration. Analyses of the solid phases showed that dissolution of alite and aluminate slowed down while analyses of the pore solution showed that citric acid was removed almost completely from the pore solution within the first hours of hydration. The complexation of the ions by citrate was weak, which could also be confirmed by thermodynamic calculations. Only 2% of the dissolved Ca and 0.001% of the dissolved K formed complexes with citrate during the first hours. Thus, citric acid retards cement hydration not by complex formation, but by slowing down the dissolution of the clinker grains. Thermodynamic calculations did not indicate precipitation of a crystalline citrate species. Thus, it is suggested that citrate sorbed onto the clinker surface and formed a protective layer around the clinker grains retarding their dissolution. 相似文献
15.
Calcium siliconsulfate and anhydrite were subjected to extraction by salicylic acid in methanol. Only calcium silicosulfate was affected, leaving a residue which was identified as “soluble anhydrite.” The fraction of residue produced was close to that expected for stoichiometric precipitation of sulfate as CaSO4. It is suggested that soluble anhydrite found in cement clinker residues after salicylic acid extraction may form in a similar manner from sulfate ions dissolved in belite or alite. 相似文献
16.
17.
Recep Boncukcuo?lu M.Tolga Y?lmazM.Muhtar Kocakerim Vahdettin Tosuno?lu 《Cement and Concrete Research》2002,32(3):471-475
Boron ores are used in the production of various boron compounds such as boric acid, borax and boron oxide. Boric acid is produced by reacting colemanite(2CaO·3B2O3·5H2O) with sulphuric acid and a large quantity of borogypsum is formed during this production. This waste causes various environmental problems when discharged directly to the environment. Portland cement is the most important material in the building industry. This material is produced by adding about 3-5% gypsum (CaSO4·2H2O) to clinker as a set retarder. The aim of this study was to stabilize borogypsum, and to produce cements by adding borogypsum instead of natural gypsum to clinker. Concrete using cement produced with borogypsum was tested to find the mechanical properties and the test values were compared with those of concrete from cement with natural gypsum. Compressive strength of concrete from cement produced with borogypsum was found to be higher than that of natural gypsum. Also, the setting time of cement with borogypsum was longer than that of the Portland cement. 相似文献
18.
19.
采用磷渣、粉煤灰、铜渣三种工业废渣分别代替天然硅质原料与石灰石配料,在湿法窑上进行了生产优质熟料的工业性生产实验,结果表明:(1)采用工业废渣配料对提高湿法生产料浆的流动度,降低料浆水分,改善生料易磨性和易烧性,降低烧成温度,促进C3S的形成等有极大的帮助。(2)所烧成的熟料具有后期强度增进率大f-CaO含量低,安定性合格率高,水化热低和磨损量及干缩率小的特点。 相似文献