SU916462A1 - Raw meal for producing hydraulic binder - Google Patents

Description

The invention relates to compositions of raw materials ^ mixtures for producing hydraulic binders, namely mixtures containing industrial waste as a lime-containing component, and can be used in the construction materials industry. ⁵

Raw mixtures are known for producing cements based on aluminosilicate and lime-containing components, in which limestone, chalk, tuff, and marble are used as the lime-containing component (1].

Binders based on these mixtures have low physical and mechanical properties and are characterized by strength of 186—

201 kg / cm ² .

Closest to the proposed one is a raw material mixture comprising clay and lime-containing components, industrial waste is used as lime-containing component - sludge from soda production in the following ratio, wt.%:

Clay component 17-22

Sludge sludge production 78-83

The sludge from soda production has a chemical composition, wt.%: CaO 39.46;

MdO 2.60; ZY ₂ 15.11; A1 ₂ O ₃ 4.62; K ₂ O 2,3;

5O ₃ 1; C1 2.57; p.p.p. 33.08; CO ₂ 24.98 [2].

A disadvantage of the known raw mix is the low strength of the binder 255—

314 kg / cm ² .

The purpose of the invention is to increase the strength of the binder.

This goal is achieved in that the raw material mixture to obtain a hydraulic binder, including clay and non-containing components, as a lime-containing component, it contains sludge sediment of chlorine production containing at least 44% CaO in the following ratio, wt.%:

Clay component 15-25

Slurry sludge of chlorine production, containing not less than 44% CaO 85 -75

Chlorine sludge is a by-product of chlorine production technology. The material (mineral) composition of the sludge is as follows ^;

'916462

CaCO3 80-85 No. C1 5-15 Md (OH) ₂ 1.5-2.5 Ca5O ₄ '0.5 N ₂ O 1,5-2 Polyacrylamide (organic composition - barking) Up to 1

Thus, the slurry sludge of chlorine production in its chemical and mineralogical nature differs from the sludge sludge _{<5 of} soda production in that it contains a significantly larger amount of CaCO ₃ (12-15%) and No. C1 (2-3%), and also this sludge additionally (compared to soda) contains polyacrylamide. _twenty

These differences create the conditions for hardening of low-basic hydrosilicates such as hydrochlorosilicates, as well as hydrochloroaluminates, the lattice of which includes polyacrylamide, which causes ^{25 an} increase in the mechanical strength of the binder from the proposed raw material mixture.

In the manufacture of raw mixtures using sludge sludge chlorine production, the chemical composition of which is presented in table. one.

Example. Raw mixtures are prepared, which are burned at 1230-1250 ° C for 3 hours.

In the table. 2 shows the composition of the raw mixes .’ and the results of their testing.

Thus, the use of a slurry sludge from chlorine production in the composition of the raw material mixture to obtain a hydraulic binder as a lime-containing component allows to increase the strength of the binder by 30%, as well as to utilize industrial wastes of chlorine production. The latter circumstance, on the one hand, expands the raw material base for the production of building materials, on the other hand, solves the environmental problem of the beneficial use of waste polluting the environment.

The annual economic effect due to the saving of conditioned raw materials is approximately 100-150 thousand rubles. in year.

Table!

- - _r - _r - - Precipitation ι ι Content, wt.% Loss at G ι ΐ ί! ’! Ρθ2θ3 C1 calcining [CaO; MdO | one . ι 5ΐΟ ₂ 1 A1 ₂ 0s Ν8 ₂ Ο + 5О ₄ ! "To ί <1_ d ι I 1 _________

one 44,4 3.29 0.68 0.38 2.42 • 0.85 0.29 .3.5 44 ' one! 44,4 4.3 0.74 0.40 2.48 0.85 0.295 5,125 44 III 44,4 5.3. 0.80 0.42 2.54 0.85 0.30 6.75 44 __________ ___________ _________ __________ _____

table 2

Mixture The content of components, wt.% The compressive strength after 28 days of water hardening, kg / e Clay component Soda sludge * production Sludge states Famous one 22 78 . 292 2 twenty 80 - 314 3 17 83 - 295 Proposed four 10 _ 90 320 5 thirty 70 315.

ϊ - Mixture

Continuation of the table. 2.

------ Content of components, wt.%. Clay component Slurry sediment soda production states Sludge states

Strength at compression of thium after 28 days of water hardening, kg / cm

6 25 - 75 440 7 twenty - 80 415 8 fifteen - 85 320 9 10 - 90 330 10 thirty - 70 320 eleven 25 - 75 450 12 twenty - 80 420 13 fifteen - 85 390 fourteen 10 - 90 340 fifteen thirty - 327 70 16 25 - .75 458 17 twenty 80 430 eighteen fifteen - 85 397 P r and m h and n and e: In mixtures 4-8 use slag about > chlorine production cage composition 1; in mixtures 9-13 - composition! < ; in mixtures 14-18 - composition 40 Clayey F o r m u l a and s about b r e component 15-25

The raw material mixture for hydraulic

Claims (1)

The raw material mixture to obtain a hydraulic binder comprising clay and lime-components, wherein ₄₅ u and I with I that, in order to increase bonding strength, it contains as izvestsoderzhashchih component slurry precipitate chlorine production, comprising at least 44% CaO next ' the ratio of components, wt.%: Slurry sludge of chlorine production containing not less than 44% CaO 85-75