Fireproof and insulating light composite glass magnesium board and its preparation method

Abstract

The invention discloses a fireproof and insulating light composite glass magnesium board and its preparation method. The board is prepared by the following raw materials by weight: magnesium chloride hexahydrate, a modifier, light calcined powder, calcined forsterite, forsterite or serpentine raw ore. The method comprises the steps of: 1. using magnesium chloride hexahydrate to prepare a solution, and adding a modifier so as to form a liquid mixture; 2. grinding forsterite raw ore powder and calcined ore powder, and mixing the powder with light calcined powder, then stirring them well; 3. subjecting the mixed powder into a double-shaft paddle mixer for mixing, stirring, and metering; 4. delivering the well stirred material into a template, which is automatically placed on a template processing roller platform by means of a plate-sucking machine, then conducting pouring, wrapping a reinforced glass fiber cloth, then conducting rolling, thickness setting and moulding; 4. sending the moulded plate to maintenance, and putting the product plate in a trimming machine for shaping, performing inspection, thus obtaining a qualified product. The method of the invention has simple process and convenient operation, and is conducive to implementation. The glass magnesium board provided in the invention has the advantages of high efficiency insulation, plate structure, no thermal bridge and cold bridge, excellent heat insulating performance, flame resistance and weatherability, as well as excellent flame retardancy and refractability.

Description

technical field [0001] The invention belongs to the field of non-metallic mineral processing and manufacturing new building materials and environmental protection, and more specifically relates to a fire-resistant and heat-insulating lightweight composite glass magnesium board, and also relates to a preparation method for a fire-resistant and heat-preserving lightweight composite glass-magnesium board, which can be used to solve Olivine ore and serpentine ore produce refractory materials and other products, while it is difficult to sell the remaining tailings massive particles and fine powder after calcination and crushing of minerals, at the same time, refractory and thermal insulation lightweight composite materials with excellent performance have been obtained, which has broad prospects. Background technique [0002] Magnesium oxychloride gel material is an air-condensing material, which has the energy-saving function of producing products without burning and steaming. Th...

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Problems solved by technology

However, the resources are severely altered, and the unaltered olivine (MgO≥44%, ignition loss≤3%) is only tens of millions of tons, and it is buried at a depth of hundreds of meters, and accounts for more than 90% of the olivine. Altered to varying degrees into peridotite and serpentine with MgO 8%, especially hundreds of millions of tons of altered peridotite (serpentine) in the surface layer of the mining area, MgO 10%, can not be directly used in industry, it needs to be calcined before it can be used as metallurgical refractory material, and calcined forsterite needs to be crushed and classified, resulting in 50% of 0 ~ 1mm powder, a small amount is used for refractory Materials, widely used in the production of pellets in iron and steel plants, with narrow applications

Since the calcined raw materials are massive ores with a size of 50-120 mm, part of them can only be used as low-grade calcium magnesium phosphate fertilizer raw materials, and the resource utilization rate is low.

In the process of olivine mining, about 30% of the olivine powder has no economic value and can only be discarded, which not only wastes resources, but also has an impact on the environment. Exploring greater uses of forsterite has become the biggest rational use of this resource. the way out

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