Blast furnace in iron and steel company of CGM grout should adopt high strength grouting material

CGM grout material high strength grouting material steel blast furnace with grouting material to some parts of the blast furnace engineering kinds high pressure grouting method grouting material filling all kinds of cracks, so as to guarantee the normal temperature and pressure. Grouting with CGM grout material also varies by using parts. For example, blast furnace bottom plate and THC S10 carbon material gaps between using SSR - Type 2 c glue filling; Blast furnace bottom steel sheet and plate under the gaps between the sand layer, the gaps between the blast furnace shell and the cooling stave with cement slurry filling; The gaps between the hot blast stove chimney Guan Village plate and steel tube with lightweight insulating cement slurry to fill in. Past these slurry is prepared according to the requirement of the specifications or drawings and construction, and not some modification of the experiment was carried out. This time in taigang 1350 m2 of blast furnace construction, in improving the quality and shorten the construction period, under the general requirements of the CGM high-strength grouting material and water reducing and antifreeze requirements are put forward. Of cooling stave grouting material for this purpose, we water reducing and antifreezing test, antifreeze for flue pipe Ci slurry test. Now finish the project according to the experimental results of plasma task, ideal results have been achieved. In order to summarize and exchange experience, and now we will test and application results summarized as follows, for your reference. Project summary and test the necessity of taigang 1350 m2, a total of three kinds of blast furnace cooling type, secondary bottom for cooling and water cooling tube furnace for cooling stave and the beam cooling water tank. Of cooling stave, a total of 13, 457, 20. 662m。 Each cooling stave are bolted on the furnace 売. Of pass in and out of cooling stave pipe by corrugated compensator is connected to the furnace shell. In order to reduce the cooling stave with や shell of the temperature stress caused by temperature difference between its connection way has fixed point, such as floating point and sliding point three ( See book, 'the installation of blast furnace cooling wall is in figure 6 and the steel structure and furnace equipment installation process in the blast furnace system' is in figure 16) , regardless of connection between the cooling stave and the furnace 売 30 mm gap must be CGM grout material settle the charge. In order to ensure the quality of the carbon brick masonry and protect carbon bricks from the water, through negotiation between both parties, decided to take a cooling stave section 1 ~ 4 first after grouting masonry; 5 ~ 13 block masonry before grouting. 1 ~ 4 but with cold wall of work has been completed in September 1990, and the 513th with cooling wall because of construction period delay, grouting construction along until early 1991. Where the taiyuan area the coldest time, generally the lowest temperature of - year 18 ~ - 20 c, historical extreme minimum temperature of 25. 5C。 In such low temperatures grouting, if do not take reliable measures, seto paste cold expansion will break the connection between the cooling wall and shell. Not the furnace shell burst, will feel the cooling stave bilge bad, consequence is very serious. To ensure the safety of the engineering quality and equipment, as well as make a predetermined time limit for a project smooth implementation, must be technically the quantitative absolute anti-freezing measures can be taken. Second, for 1 ~ 4 with cooling stave section construction although there is no anti-freezing problem, but this - Section of the furnace bottom use it is decided to a generation of blast furnace of the key parts of the furnace life. Especially composite thin bottom structure is used in the blast furnace as a result, thermal effect of high や life of furnace bottom week there will be a decisive role. , of course, this is mainly by carbon dao is the inside of the cooling stave and its implementation. But there are also some experience has shown that the material of cooling wall of the lateral filler material and dense degree of furnace bottom use effect also has certain influence. So, according to the requirements of party a under the condition of material constant, try to improve the compactness of grouting. To this end, we conducted water reducing admixture beautiful seam an agent, with lower water in the grouting material to improve its compactness of the test.