Search for Optimal Ways to Neutralize Hydrolytic Lignin for Briquetting

Abstract

There were made experiments on neutralize samples of hydrolytic lignin, taken from different depths of the Ziminsky hydrolysis plant dumps. There was detected heterogeneity of the composition and pH level of the stored waste at different depths and in different places within the dumps. There was defined that the extraction of hydrolytic lignin from the dumps for subsequent briquetting must be carried out with a depth of at least 1 m. As neutralizing agent used raw materials of local producers: lime, dolomite floor, waste marble chips. There was showed that to neutralize hydrolytic lignin, it is more economical to use lime. Neutralization should carried out at a moisture content of the raw material of sat least 50% within 1 hour after thorough mixing. Neutralization can be considered carried out if the pH value in the sample taken lies in the range 6,7–7,3.