Preparation technology for novel multi-element shield radiation protection cement and product

Abstract

The invention belongs to the special building material preparation field and the industrial solid waste comprehensive utilization field, and concretely relates to a preparation technology for a novel multi-element shield radiation protection cement and a product. The technology comprises steps: a radiation protection cement clinker, industrial solid waste, mixed materials and gypsum are subjected compounding mixing; the mixed materials are dispersed and then are subjected to on-line drying; the dried mixture is subjected to pre-grinding processing; the pre-grinding power is subjected to primary power section; sorted micro-powder is ground again, and micro-powder with a specific surface area of more than 430m<2>/kg is obtained; the micro-powder is subjected to secondary powder selection, and novel multi-element shield radiation protection cement with a specific surface area of more than 450m<2>/kg is obtained. The specific surface area of the cement powder is more than 450m<2>/kg, the content of particles with a particle size of 3-32 micrometers in the powder is more than 85%, the micro-particle content is high, the powder abundance weighted average is stable, heat of hydration is low, the early strength is high, the endurance is strong, and the novel multi-element shield radiation protection cement has characteristics of high-efficiency shielding, comprehensive protection, stable structure, low production energy consumption and the like.

Description

technical field [0001] The invention belongs to the field of preparation of special building materials and the field of comprehensive utilization of industrial solid waste, and specifically relates to a preparation process of a novel multi-element shielding radiation-proof cement and a product thereof. Background technique [0002] At present, the radiation-proof cement mainly researched and applied at home and abroad includes barium cement, strontium cement and boron-containing cement. In terms of mineral composition, barium cement and strontium cement replace calcium oxide in Portland cement with barium oxide and strontium oxide to form a hydraulic cementitious material with tribarium silicate and tristrontium silicate as the main mineral phase. Its production process has a high calcination temperature and poor thermal stability. The hydration structure will be destroyed at 100 ° C. It is only suitable for low temperature environments and cannot shield neutrons. Boron-con...

AI Technical Summary

Problems solved by technology

However, the main raw materials of the new multi-component shielding radiation-proof cement (radiation-proof cement clinker, industrial solid waste, and mixed materials) have many components, and their respective mineral properties such as abrasive hardness, Bond work index, and mechanical strength are quite different. , and the new multi-shielding radiation-proof cement has strict requirements on the particle size distribution and specific surface area of ​​cement powder. , low heat of hydration, high early strength and strong durability