Filling mixture compound

FIELD: mining.

SUBSTANCE: filling mixture compound includes ground granulated acid blast-furnace slag containing particles, %: less than 1 mcm - 4.3; less than 3 mcm - 12.6; less than 5 mcm - 17.2; as inert filler are processing wastes of wet magnetic separation of ferruginous quartzites, which contain particles, %: less than 1 mcm - 3.4; less than 3 mcm - 12.6; less than 5 mcm -17.2, water and in addition - composition of lime-gypsum byproduct of vanadium production and SP-1 superplasticising agent at the following component ratio, wt %: the above slag 16.1, the above composition 4.8, the above wastes 57.7, SP-1 superplasticising agent 0.0805 and water is the rest.

EFFECT: avoiding expensive cement, use of slag of lower grade, increasing the strength, enlarging and increasing volumes of utilised technogenic wastes for sufficient improvement of ecological environment of the region.

4 tbl

 

The invention relates to the mining industry and can be used in the development of mineral deposits with the mined-out space.

Known filling mixture comprising cement, ground granulated blast furnace slag, aggregate, and water in the following ratio, wt.%: cement - 2; ground granulated blast furnace slag - 18,4; aggregate - 61,38; water - other [1].

The disadvantages of this mixture are low ductility due to insufficient content of the fine fraction, and low strength of 3.0 MPa at 90 days of constructed array through the use of a filler with a tensile strength below the normative strength of the bookmark.

The closest present invention is a compound of backfill mixture comprising cement, ground granulated blast furnace slag, inert filler and water. As the inert filler the composition contains amorphous precipitation neutralization of sulfuric acid with limestone, pre-treated with an aqueous solution of sulphate of iron (III) Fe(OH)SO4, in the following ratio, wt.%: cement 4,0-6,8; ground granulated blast furnace slag of 9.7 to 16.5; amorphous precipitation neutralization of sulfuric acid with limestone 31,7 of 40.8; hydroconsult iron (III) 1,2-2,0; water the rest [2].

The disadvantages of this structure are the use as a binder scarce material - cement and slag with a higher quality factor 1,51, table 1, low strength for the high rate of binding (up 23%) and limiting waste vanadium production.

The task of the invention is the elimination of expensive cement and the use of slag lower grades, increase strength, enhance and increase recycling industrial wastes to improve the ecological environment of the region.

To solve this problem is proposed composition of the filling mixture, including ground granulated blast furnace slag, inert filler and water. Moreover, the binder specified acidic slag containing particles: less than 1 µm and 4.3%; less than 3 μm for 12.6%; less than 5 μm - 17.2%, and as inert filler - tailings wet magnetic separation of ferruginous quartzite containing particles: less than 1 µm and 3.4%; less than 3 μm for 12.6%; less than 5 μm is 17.2%. Optionally, the composition contains a composition of lime-gypsum is a by - product vanadium production, and superplasticizer SP-1, in the following ratio, wt.%:

Specified slag16,1
This track4,8
These wastes57,7
Superplasticizer SP-10,0805
WaterRest

The technical result is an increase in strength of the filling mixture, recycling mining production, vanadium production and waste beneficiation of ferruginous quartzite, reduction of water consumption, reduction of environmental pollution.

Lime-gypsum composition is a by - product vanadium production, THE 5744-002-1246473-2004 containing V2O5- 3%, MnO - 22,5% in the chemical composition shown in table 1).

According to the official site: http://www.ktprom.ru/plast.htm, www.yarhim.ru/news/2006/10/news15/?print=page, http://www.polyplast-un.ru/rus/sp-1/, superplasticizer SP-1 is a synthetic organic substance on the basis of a product of condensation of naphthalenesulfonate and formaldehyde with a specific ratio of fractions of different average molecular weight, polynaphthalenesulfonate or methylenbis (naphthalenesulfonate) of sodium. Classification GOST 24211 refers to plastifitsirujushchej-water-reducing mind - superplasticizers. Chemical composition: methylenbis (naphthalenesulfonate) sodium or polynaphthalenesulfonate. Superplasticizer SP-1 produced according to TU 5870-005-58042865-0 and designed (used):

- to increase the workability and formemost concrete mixes without compromising strength and performance durability of concrete (at constant water-cement ratio);

for a substantial improvement of physico-mechanical properties and the structural properties of concrete (while reducing water consumption and constant workability);

- to improve the workability of concrete mixtures and improve the physico-mechanical and structural properties of concrete (while reducing the water / cement ratio and increasing the workability);

- to reduce cement consumption without reducing the workability of concrete mixture, physico-mechanical and structural properties of concrete by reducing the water content in concrete mix).

Example

Granulated blast acidic slag (slag), ground to the content of particles less than 1 μm and 4.3%; less than 3 μm for 12.6%; less than 5 μm and 17.2% (granulometric composition shown in table 2), mixed waste enrichment wet magnetic separation of ferruginous quartzite containing particles: less than 1 µm and 3.4%; less than 3 μm for 12.6%; less than 5 μm and 17.2% (granulometric composition shown in table 2), and lime-plaster composition containing 100% fraction less than 43 microns, and shut water, which had previously added superplasticizer SP-1, the final mixture was mixed to a uniform consistency. The resulting mixture is prepared samples of size 70×70×70 mm, the Samples were kept in a climatic chamber for 2-3 days before reaching the Stripping strength of the samples. In the chamber was maintained temperature 20±20°C and relative humidity of 90-95%, i.e. conditions similar to the conditions of curing of the array in the mine. After demoulding, the specimens were again placed in the climatic chamber for further curing for 90 days, after which determined the mechanical strength using a hydraulic press. The following results are obtained: mechanical strength - 7,15 MPa at the age of 90 days when the binder content of 16.1% (slag).

The prototype, when the binder content 23,12% (cement of 6.73% and slag 16,39%), mechanical strength is 4.35 MPa at the age of 90 days.

Hydraulic properties of blast furnace slag evaluated according to GOST 3476-74 the quality factor K, which is determined by the formula:

when the content of magnesium oxide to 10%

when the content of magnesium oxide is more than 10%:

For grades 1 K=1,65; 2 varieties K=1,45; 3 varieties of 1.2.

In table 3 shows the chemical composition of the granulated blast furnace slag, and in table 4 - source gross composition of the mixtures and the results of testing the mechanical strength of samples prepared from these Mesa.

Table 1
The chemical composition of lime-plaster composition, calculated on the anhydrous state, wt.%
CaOMnOCaSO4MgOV2O5Al2O3FeTiO2SiO2
23,522,542,92,53,00,31,50,83,0

Table 2
Granulometric composition of components
componentsThe distribution of particle fractions, wt.%
0-1 µm1-3 microns3-5 microns5-10 microns10-43 is km 43-7171-100Σ
ground
blast furnace slag4,308,304,6012,2540,8922,716,95100
Tailings wet magnetic
separation of ferruginous quartzite3,409,204,6012,4245,9021,992,49100

The chemical composition of blast furnace slag
The quality factor KCaO, %SiO2, %Al2O3, %MgO, %MnO, %Other %
The placeholder1,5128,936,517,610,90,7of 5.40
Declare1,2340,442,7of 5.46,70,0264,78

From table 2 it follows that the task of increasing the mechanical strength backfill mixes, reduction of binding is achieved by adding plasticizer SP-1 and the composition of the lime-gypsum (by-product vanadium production).

The use of the proposed technical solution completely eliminates the consumption for filling operations expensive cement is, as well as ensures high durability at replacement of slag on the more low-grade and expand and increase the volume of recyclable industrial waste to a significant improvement of the ecological environment of the region.

Sources of information

1. Lukowski, Emeniem, Kuip. The use of blast furnace slag dump for the preparation of binding of filling mixture. Mining magazine, 1979, No. 1, p.39.

2. RF patent №2186989 published 10.08.2002,

The composition of the filling mixture, including ground granulated blast furnace slag, inert filler and water, characterized in that it contains the specified acidic slag containing particles, %: less than 1 µm and 4.3; less than 3 μm - 12,6; less than 5 μm - 17,2, as inert filler - tailings wet magnetic separation of ferruginous quartzite containing particles, %: less than 1 µm and 3.4; less than 3 μm - 12,6; less than 5 μm and 17.2, and additionally composition of lime-gypsum is a by - product vanadium production and superplasticizer SP-1, in the following ratio, wt.%:

Specified slag16,1
This track4,8
These wastes57,7
The soup is a plasticizer SP-1 0,0805
WaterRest



 

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