Gypsum powder: the development of natural anhydrite in the 1970s-1980s, shaodun, Nanjing and other large anhydrite mines established and realized one after another "reform and opening up", various factories and mines, scientific research institutions and colleges and universities of theory and Application Research of natural anhydrite pushed to a climax, which can not only find the setting of anhydrite cement, but also enhance, It can also improve the fluidity of cement paste and the density of hardened body, and has achieved good results in the preparation of sulphoaluminate cement, slag cement, oil well cement, low alkali cement and various Portland cement with fast hardening.

　　1985年，國(guó)家正式頒布了《水泥用石膏和硬石膏標(biāo)準(zhǔn)》(GB 5483 85)，硬石膏的應(yīng)用進(jìn)入了一個(gè)新階段。同時(shí)對(duì)硬石膏的水化硬化、活化機(jī)理以及硬石膏水泥的生產(chǎn)和應(yīng)用進(jìn)行了研究。20世紀(jì)90年代以來，硬石膏的活化技術(shù)有了新的進(jìn)展，硬石膏的水化硬化速度、耐水性和強(qiáng)度都有了很大的提高。現(xiàn)在除了使用硬石膏作為水泥混凝劑和生產(chǎn)各種水泥外，硬石膏還用于生產(chǎn)膨脹劑、地坪抹灰、石膏抹灰、模型抹灰、人造大理石、硬石膏砌塊、硬石膏陶瓷和各種板材等建筑材料。由于我國(guó)硬石膏儲(chǔ)量豐富，具有加工工藝簡(jiǎn)單、節(jié)約能源、也具有利用廢渣、保護(hù)環(huán)境等優(yōu)點(diǎn)，在未來必將得到迅速的發(fā)展。

　　In 1985, the state officially promulgated the standard of gypsum and anhydrite for cement (GB 548385). The application of anhydrite has entered a new stage. At the same time, the hydration hardening and activation mechanism of anhydrite and the production and application of anhydrite cement were studied. Since the 1990s, the activation technology of anhydrite has made new progress, and the hydration hardening speed, water resistance and strength of anhydrite have been greatly improved. Now in addition to using anhydrite as cement coagulant and producing various cements, anhydrite is also used to produce building materials such as expansion agent, floor plastering, gypsum plastering, model plastering, artificial marble, anhydrite block, anhydrite ceramics and various boards. Due to the abundant reserves of anhydrite in our country, it has the advantages of simple processing technology, energy saving, waste residue utilization and environmental protection, and it will be developed rapidly in the future.

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　　The above is the relevant content introduced by Jinan gypsum powder manufacturer. If you want to know more, please visit the website: http://www.netjobs.cc