Abstract
The possibility of using a soda-sulfate mixture - an alkaline waste from the production of caprolactam, as a mineralizing additive in a Portland cement raw mixture containing, as a silica-containing component, flotation tailings of the lead-concentrating plant of Almalyk MMC, has been studied. The effect of this additive on the processes of mineral formation during the synthesis of Portland cement clinker is shown. The possibility of additional recovery of residual non-ferrous metals - lead and copper - by sublimation and trapping of their chlorides has been established.
Highlights
The use of by-products and various industrial wastes in the production of building materials, in particular, cement, are devoted to the work of many researchers [1-12]
SOURCE MATERIALS Limestone is the main component of the raw mixture in the synthesis of Portland cement clinker, which contains at least 50% calcium carbonate-CaCO3 with an admixture of clay materials, dolomite, silica, iron oxide and aluminum
RESEARCH RESULTS AND DISCUSSION For research according to the generally accepted method [15], cement raw mixtures with different saturation coefficient КН = 0.86 - 0.89 and silica modulus n = 2.36 - 2.41 were calculated, and alkaline waste was added in an amount of 0.5-5, 0% of the total mass of raw mixtures
Summary
The use of by-products and various industrial wastes in the production of building materials, in particular, cement, are devoted to the work of many researchers [1-12]. It was of interest to study the possibility of using the tailings of the lead dressing plant of the Almalyk Mining and Metallurgical Combine (AGMK) in the production of Portland cement clinker as a raw material and additional recovery of residual non-ferrous metals, as well as to determine the construction and technical properties of the resulting Portland cement.
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