SU1344747A1 - Method of producing alkali slag binder - Google Patents

Abstract

This invention relates to chemical technology in hard materials and can be used in the manufacturing of building materials. The purpose of the invention is to prevent a decrease in activity and specific surface area in a time-dependent manner. In the method of obtaining slag alkaline in the slurry as an additive, when grinding the slag, oxidizers are used from the group: KMp04, KS10v, RgCrO, K CrgOy, RNO,, ROj. four; R-Na, K; and during the heat treatment, the temperature is raised at a rate of 3-5 ° C for 1 minute, isostatic holding at this temperature for 5-25 minutes and then cooled at a rate of 0.5-2.5 ° C for 1 minute. 3 tab. (L with 4; 4: vj 4 SI

Description

This invention relates to chemical technology in a burning substance and can be used in the building materials industry.

The purpose of the invention is to prevent a decrease in activity and specific surface area in a time-dependent manner.

As initial components, granulated slags, dried up to a moisture content of 1 wt.%, Are used, in particular Zaporizhia, Tula, Chelinsky, whose chemical composition is given in Table. I, and as an additive when grinding, chemical pure oxidizers from the group RMnO, RC10R, .R2CrO ,, ,, BNO,, ROg, HjOj, where, 3.4, R-Na, K. (potassium permanganate, potassium hypochlorite, potassium chromate, sodium dichromate, sodium nitrate, hydrogen peroxide, potassium superoxide).

The method is carried out as follows.

The slag is subjected to joint grinding in a ball mill with an additive in the amount of 0.05-0, 15 wt.% To achieve a specific surface 350 in the PKS-2 instrument. After grinding, the powder is placed in an oven and heated to a speed of I min, kept at this temperature for 5-25 min. And cooled at a rate of 0.5-2.5 ° C in

1 min to ambient temperature.

After cooling, they are closed with an alkali-containing solution.

The temperature and isothermal holding time is prescribed depending on the type of oxidant.

The live test is carried out according to GOST 310.1-76- 310.4-76, but instead of the mixing water, sodium silicate solutions with a silica module of 2.0 and 2.86, sodium carbonate and caustic soda are used as the alkaline component. The density of solutions of sodium silicate and caustic soda take 1300 kg / m, and sodium carbonate 1200 kg / m

0

5 o

five

Q

5 Q

Specific examples of the method are presented in Table. 2; quality indicators - in the table. 3

During grinding, the additive is evenly distributed throughout the slag and partially binds the active components of the surface of the slag particles. Heat treatment according to the proposed mode contributes to the decomposition of oxide of the sink, which leads to an increase in the degree of binding of the active centers on the surface of the slag particles. Full binding of the active sites significantly reduces caking and prevents a decrease in the activity of a trap in time. Modification of the slag is achieved by changing the physical structure of the surface of the slag particles. The amount depending on the type of oxidant used is changed, the amount introduced during the slag grinding, as well as the temperature and duration of isothermal holding, it is possible to control the degree of binding of the active centers, ensure its minimum caking greatly prevent the loss of activity in the idle in time.

Claims (1)

Formula The method of obtaining slag alkaline into a binder, including joint grinding of slag and additives, heat treatment at 80-150 ° C with isostatic holding and mixing with a alkali-containing solution, characterized in that, in order to prevent a decrease in activity and specific surface area in the bushing, as an additive grinding slag use oxidizers from the group: RMnO, RCIO, R2Cr04,, RNOj,, ROj, K202 in an amount of 0.05-0.15 May.%, Where, 3.4; R-Na, K, and during the heat treatment the temperature rises at a rate of 3-5 ° C per minute ,. isostatic holding for 5-25 minutes and subsequent cooling at a rate of 0.5-2.5 ° C per minute. agai way 89.7 3 105 10 10.2 0.1 89.7 5 125 20 10.2 0.1 89.7 10.2 5 130 25 0.1 Table table 2 2.0 0.5 0.5 Sodium superoxide Continued table. 2 D. Zaporizhzhya Domain slag89.65 Sodium silicate () 10.2 3 Potassium permanganate 0.15 Zaporizhzhya Domain slag89,7 Sodium silicate (Mj.2) 10.2 3 Potassium permanganate or 0,1 Potassium permanganate Zaporizhzhya Domain slag89.75 Sodium silicate () 10.2 3 Potassium permanganate 0.05 Tula blast shpak89,7 Sodium silicate (M, 2) 10.2 3 Potassium permanganate 0.1 Chel Binsky domain slag89,7 Sodium silicate (Mj, 2) 1.0,2 3 Potassium permanganate iO, 1 Tula domain slag78.0 120 Sodium silicate (N.2,86) 11.9 3 Potassium permanganate .0.1 Known method Tula blast furnace slag 78.0 Thermal Sodium silicate punch (M 2.86) 11.9 Polyethylsiloxane .0,1 Zaporozhye Blast Heat Slag 89.3 howl hit Continued table. 2 ... 100 15 1.5 100 15 1.5 100 15 1.5 100 15 1.5 100 15 1.5 120 25 2.5 120 40 Sodium silicate () 10,2 Polyethylsiloxane 0.5 Zaporizhzhya blast-furnace slag89.7 Thermal Sodium Silicate () 10.2 punch Potassium permanganate Zaporizhzhya blast furnace slag 0.1 89.7 Heat Sodium Silicate (M (, 2) 10.2 blow Hydrogen peroxide Continued table. 2 Z 150 120 100 120 0.1 90 120 0.1 T vlia "}