技术简介

本技术针对造纸白泥高含水率、高碳酸钙、重金属浸出等问题，将造纸白泥与水泥混合，进行固化成型反应脱水，可大大降低造纸白泥煅烧入窑含水率，形成低温煅烧技术。经过700-900度的煅烧，此时造纸白泥中的碳酸钙分解为氧化钙，可作为水热合成的钙质原料。将造纸白泥再生的氧化钙与粉煤灰、石英尾泥等硅质原料混合，经造粒成球、自养、蒸养后得到多孔硅酸盐滤料。

Introduction

The white sludge for paper making has high water and calcium carbonate content and is prone to leachingof heavy metal. This technology addresses such problems by mixing the white sludge with cement foisolidification, formation and dehydration, so as to significantly reduce the water content of paper-making whitesludge for burning in kiln, thus facilitating low-temperature calcination. Through calcination at 700-900°c, thecalcium carbonate in the paper-making white sludge is decomposed into calcium oxide, which may be used asthe calcium material for hydro-thermal synthesis. The calcium oxide regenerated thereby is mixed with coal ash.quartz tail sludge and other siliceous materials to produce porous silicate filter media through granulation.natural curing and steam curing.