Method for preparing natural hydraulic lime by using limestone and quartz powder

A technology of quartz powder and limestone, applied in the field of preparing natural hydraulic lime

Active Publication Date: 2015-06-24
新疆荣高鸿骏新材料技术有限公司
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  • Method for preparing natural hydraulic lime by using limestone and quartz powder
  • Method for preparing natural hydraulic lime by using limestone and quartz powder
  • Method for preparing natural hydraulic lime by using limestone and quartz powder

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Embodiment Construction

[0011] Limestone is used as the main raw material, and high-purity quartz powder with a purity of more than 98% is added to adjust the molar ratio of calcium oxide and silicon oxide, that is, CaO / SiO 2 =2.14—4.48, the content of alumina does not exceed 4.5% of the total mass of raw materials, so as to control the content of hydraulic products in the product; limestone and quartz powder with adjusted components are mixed and ground by a ball mill for 6 hours to 10 hours; 180 mesh sieve The amount is not more than 3% of the total mass of the sieved material; the mixed raw material is added to 8% of the mixed raw material mass of water, then fully mixed and stirred, sealed and stored for about 6-7 hours and then pressed into a cylinder, and then It is dried; the dried cylinder is placed in a furnace for calcination, the calcination temperature is 1100°C-1200°C, and the time is 3 hours; the calcined material is quenched to room temperature in the air; the free For calcium oxide co...

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Abstract

The invention relates to a method for preparing natural hydraulic lime by using limestone and quartz powder, and belongs to a building material. The method is implemented by taking limestone as a main raw material through the steps of adding high-purity quartz powder to adjust the ratio of calcium oxide and silicon oxide, controlling the content of alumina, carrying out mixed material co-grinding for 6-10 hours by using a ball mill, adding water with a mass accounting for 8% of the mass of a mixed raw material, fully stirring, putting the obtained object into a sealing bag to place for 6-7 hours, pressing the obtained object into a cylinder, drying the cylinder by using a drying oven, putting the cylinder into a muffle furnace to calcinate for 3 hours at a temperature of 1100-1200 DEG C, cooling the calcinated material to room temperature in the air by air cooling, determining the free calcium oxide content of the calcinated product, adding a certain amount of water for slaking into the calcinated product, and after the slaking process is completed, obtaining desirable natural hydraulic lime.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a method for preparing natural hydraulic lime by using limestone and quartz powder. Background technique [0002] Natural hydraulic lime (Natural Hydraulic Limes, NHL) is slaked lime obtained by burning and digesting clayey limestone with varying clay content or siliceous limestone with varying silica content, or by mixing calcium silicate, The lime is obtained from the substances calcium aluminate and calcium hydroxide. They are characterized by hardening on contact with water and then gradually carbonating in air to achieve final hardness. They are mainly used as cementitious materials to make bonding, plastering or jointing mortars for construction [0003] Natural hydraulic lime has the advantages of lime and cement, low shrinkage, salt resistance, moderate compressive and flexural strength, and the hardening of natural hydraulic lime is divided into two processes, namely,...

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Application Information

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IPC IPC(8): C04B2/02
Inventor 兰明章马海锋崔素萍王子明毛倩瑾王亚丽
Owner 新疆荣高鸿骏新材料技术有限公司
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