1. The raw materials and technical requirements (1) for the production of sand-lime brick sand sand sand-lime brick Hankou Which is good, can be pit sand, river sand, aeolian sand to build sand-lime brick Hankou, can also be crushed rock artificial sand or industrial waste foundry sand used. But no matter what kind of sand used should meet the following requirements. ① sand silica content of greater than 65% ② sand clay content should be less than 15% ③ sands hydroxide, sodium oxide shall not exceed the total amount of 2.5% ④ sand should not contain gravel, roots, bark, etc. the moisture content of organic impurities .⑤ sand shall not exceed 6% by mass of quicklime lime directly affects the quality of sand-lime brick, as far as possible selection of high calcium content, digestion speed, high temperature digestion quicklime their specific requirements are as follows:.. CaO content> 60%; MgO <5%; digestion rate 60 ℃; burned lime <5%; lime <10%; chalking ash <10% in order to solve the lime hydration volume expansion during impact on sand-lime brick, usually adopt a number of measures to improve the following .① lime fineness control in general 3000cm2 / g around .② improve water-cement ratio. molding mixture of water control in general 7.5% ~ 10% .③ gypsum and other additives added. (3) Production Any drinking water may be used with natural water, it shall comply with the following indicators: PH value of not less than 4; total salt content must not exceed 5000mg / L; shall not contain fat, vegetable oil, sugar, acids and other harmful substances. Hankou Hankou sand-lime brick manufacturers _ _ sand-lime brick cement pavilion by pavilion Hongshan District of Wuhan cement operation. Hongshan District of Wuhan pavilion cement business unit (www.whltsn.com) (www.hbltsn.com) strong, credible, in Wuhan of cement and related products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead gazebo cement into the brilliant and you work for a better future!