SU117259A1 - The method of obtaining local slag in a tent - Google Patents

Description

A method is proposed for obtaining local to the tent and wall: stones based on the waste of metallurgical plants — dump basic blast-furnace slags — used in the mixture as a lime component, with addition of top dust, ore fines and pyrite. Ogarkov as an acidic mineral supplement.

The fine grinding of these components, followed by preparation and keeping in wet conditions, causes the known in the slag to bind with iron oxides with the formation of low-base calcium ferrites, giving the gustatory properties

Due to the fact that the hardening of calcium ferrites proceeds slowly, it is recommended to add calcium chloride or sodium chloride additives to accelerate the hardening reaction, contributing, in addition to a better structure formation, in the early stages.

The proposed method eliminates the parking of products in an autoclave, and thus the ability to produce stones directly in rural areas without relatively large investments in the construction of steam power.

According to the proposed method, the domain main dump dump is passed crushing on the dump, to the size of pieces O-50 mm, is fed; bznker over the balm mill. In the second bunker above the mill, top gas dust or pyrite cinder is given.

The components are metered in a ratio of 1: 6 (koloshnikov. Dust — waste slag) by volume and are ground together for the fineness of ordinary Portland cement, as stipulated in GOST 970-4.

Obtained in such a way goes to the press. Molding for mass is prepared in an overpressure mixer in a 1: 1 ratio (in a treadmill - sand) by volume.

The moisture of the mass should be 9-12Vo. Calcium chloride or sodium chloride in an amount of 3–5 ° / wt of the substance is added with mixing water.

Mb 117259-2 -

Stones are molded on conventional silicate or other presses capable of creating a pressure of 80-100 kg / slg.

Molded stones harden in wet conditions. Local sludge can also be successfully applied to wrinkle masonry and plaster solutions up to grade 50 inclusively.

Physical and mechanical indicators of testing local slag cement are as follows:

Subject invention

The method of obtaining local slag in a binder; By the fact that, in order to use the waste of the metallurgical plants as the main raw material, they use basic (replaceable dump slag, which is ground in a ball mill together with pyrite cinder, flue dust, or) fines.