SU87296A1 - Method for the production of slag Portland cement - Google Patents

Description

with. M. Roko, A. M. Kuznetsov and V. F. Krylov METHOD OF MANUFACTURE OF SLAG-PORTLAND-CEMENT

Said September 17, 1919 for Lo-104573 to the USSR State Technical Committee

Typically, the content of manganese in the slags used for the production of slag-Portland-cemenite is no more than 4.o.

The slag-Portland cement obtained on low-level slags with a high content of manganese has low strength, and therefore, to improve the quality of cement, it is necessary to increase the percentage content of North-Lac cement clinker in the mixture, which increases slag-Nortland cement.

The production of slag-n:) ptlaid-Lle ian from slags with an increased content of manganese oxide according to the proposed method requires the quality of slag-portlaid emma i; this broadens the raw material base of Placo-Hurtland-Cement; s.

A distinctive feature of the pre.:; Lagged method consists in that in the summer house, the pump of the usual cops:.: Additives (clinker, slag, gypsum) are added additives rich in alumina A Yuzvgidratnoi form in the form of aluminum slags, kaolin clays calcined at 800 wastes in the production of aluminum chloride or cholite cement. The latter is introduced without any treatment in the form of poroigka in the amount of 4-6% by weight and portlaid-lacquer cement.

Aluminum slags, introduced in the amount of 4-Sio, are the weight of slag port-portlaid-cement and represent a defect: the material with alumina content up to 90% is co-shaped (in the case of calcined vee and foto), taken from the old dumps, i.e., leached by aiMOC scopes agents. Best regards. It was-- ;. -, o - ;: Qi should be preliminarily leached with water in order to remove solids, and then dried. The slags from the old waste dumps are also dried by addition to the cement cement.

The use of these additives significantly increases the limit of promiosti z.menta. For example, cement. prepared by Koyoogorsky slags, with a hard consistency; i; in the absence of nepeuiie / ieHHbix additives, at 28 days of age has a compressive strength

№ 87296

207 ii for a stretch of 23.6 / cg / clt When adding 6% alumina cement or 6% aluminum slag, the compressive strength, respectively, is 253 and 315 kg1cm and for tensile strength 24.2 and 24.5 kg1 sl-.

11 Reg. 3 of the series.

The method of production of 1. Laco-Portland-cemeite from slags with a high content of manganese oxide, characterized in that, in addition to the usual components (clinker, slag, giis), alumina-rich additives in the form of alumina slags, kaolin clays, prokaleynyh at 800 °, waste in the production of aluminum chloride or alumina cement.