Composition of fill mixture

FIELD: mining.

SUBSTANCE: composition of a fill mixture comprising a ground acid domain pelletised slag, a superplasticiser SP-1, water and wastes of dressing of wet magnet separation of ferruginous quartzites, contained the following mixture as a binder - a mixture of jointly ground stale acid domain pelletised slag, current wastes of dressing of wet magnet separation and a superplasticiser SP-1, at the following ratio of components, wt %: specified slag - 49.8; specified wastes - 49.8; superplasticiser SP-1 - 0.4, and an inert filler - stale wastes of dressing of wet magnetic separation of ferruginous quartzites at the following ratio of components, wt %: binder -22.65; filler - 55.35; water - balance.

EFFECT: recycling of stale wastes of dressing and stale acid domain pelletised slag, reduced consumption of slag as a binding component, reduced water amount as mixture spread increases with preservation of required strength, increased recycling of dressing wastes to improve condition of environment in KMA region.

1 ex, 1 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, 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 [I].

The disadvantages of this structure are used as a binder scarce material - cement and slag with a high quality factor 1,51; the complexity of the composition, complicating cooking it in an industrial application, as it will require additional lines and operations to add each component; high consumption of water, requiring additional funds and equipment for drainage operations.

Known filling mixture comprising cement, ground granulated blast furnace slag, aggregate - sand and water in the following ratio of components, the AC.%: cement - 1,4-2; ground granulated blast furnace slag - 18,8-19,9; aggregate - 62,8-63; water - the rest. [2]

The disadvantages of this mixture are low strength (4.5 MPa at the age of 180 days), the use of cement and natural aggregates.

Known filling mixture comprising cement, ground granulated blast furnace slag, aggregate - crushed diabase, chopped straw and water in the following ratio, wt.%: cement - 2,9-5,07; ground granulated blast furnace slag - 15,21-16,91; aggregate - 52,24-53,22; water - the rest. [3]

The disadvantages of this mixture are also low strength (5,12 MPa at the age of 180 days) and the use of cement.

Also known composition comprising cement, ground granulated slag and water, and as aggregate technical sulfur, a modified iodine, and ash CHP in the following ratio, wt.%: cement from 4.2 to 7.0, sulfur 19,4-29,26, ash CHP-10,1-15,24, granulated slag - 26,7-39,6, iodine - 0,0038-0,0058, water - the rest [4].

The disadvantage of this mixture is the increased consumption of binders (28-46%) and low strength at high flow knitting (6,9 MPa at the age of 180 days).

Closest to the proposed invention is the composition of the filling mixture, including ground granulated blast furnace slag, inert filler and water, contains the specified acidic slag containing FR who work less than 0.071 mm not less than 90 wt.%, as the inert filler - tailings wet magnetic separation of ferruginous quartzite containing particles less than 0.071 mm not less than 90 wt.%, optional superplasticizer SP-1, in the following ratio, wt.%: specified slag - 22, these wastes is 54.5, superplasticizer SP-1 - 0,4 content of the slag, water - the rest [5].

The disadvantages of this structure are limiting the disposal of stockpiled tailings wet magnetic separation of ferruginous quartzite and stale sour granulated blast furnace slag, the average flowability of the mixture.

Objectives of the invention are: recycling of old tailings and stale sour granulated blast furnace slag, reducing consumption of slag as a binder component, reducing the amount of water when increasing the effective flowing property of the mixture and while maintaining the desired strength, increase utilization of tailings to improve the environment.

To solve this problem is proposed composition of the backfill mixture comprising acidic ground granulated blast furnace slag, superplasticizer SP-1, water and tailings wet magnetic separation of iron ore. As the binder used is a mixture of crushed together stale sour granulated blast furnace slag, a current is their tailings wet magnetic separation and superplasticizer SP-1, and as an inert aggregate is stockpiled tailings wet magnetic separation of ferruginous quartzite, in the following ratio, wt.%: astringent - 22,65; aggregate - 55,35; water - the rest. And used in the binder composition contains the following ratio of components, wt.%: specified slag - 49,8; these waste - 49,8; superplasticizer SP-1 to 0.4.

The technical result - reduction of binding, improved portability due to rheological properties, waste management hydrometallurgical production, limestone substandard and waste beneficiation of ferruginous quartzite, reduction of environmental pollution.

According to the official site: http://www.ktprom.ru/plast.htm. www.varhim.ru/news/2006/10/news15/?print=page. http://www.polvplast-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 5870005-58042865-05 and designed (use):

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.

Stale sour granulated blast furnace slag with a quality factor K=1,23, which were stored in bags for 4 years and at the expiration of the specified term has a quality factor K=1,08 (activity granulated blast furnace slag falls during storage over 1 year [6]) was ground with current waste enrichment wet magnetic separation of ferruginous quartzite and superplasticizer SP-1 to an average particle size of 30.66 per μm. The obtained binder mixed with stale waste enrichment wet magnetic with whom paratii ferruginous quartzite, selected from a tailings with an average particle size of 75,76 μm and shut water. The final mixture was mixed to a uniform consistency. The resulting mixture is prepared samples of size 70×70×70 mm, which 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 hardening within 180 days, after which determined the mechanical strength. The following results are obtained: flowing the filling mixture is 190 mm, the mechanical strength is 7.0 MPa, with a water content of 22%, the content of ground granulated slag in the total mixture to 11.28%. The content of the tailings - 85% dry matter.

The table shows the original gross composition of the mixtures and the results of testing the mechanical strength of samples prepared from these mixtures.

From the table it follows that the task of disposing of old tailings and stale sour granulated blast furnace slag, reducing consumption of slag as a binder component, reducing the amount of water when increasing the effective flowing property of the mixture while maintaining the requirement which has been created strength, increase utilization of tailings to improve the condition of the environment is achieved by using as a binder a mixture of crushed together stale sour granulated blast furnace slag, tailings wet magnetic separation of ferruginous quartzite and superplasticity SP-1, and as aggregate stockpiled waste wet magnetic separation of iron ore.

Sources of information

1. Patent 2186989 published 10.08.2002,

2. Trabuco A.L. Application hardening bookmarks in underground mining. - M.: Nedra, 1981, p.31.

3. Patent 2270921 published 27.02.2006,

4. Patent 2302531 published 10.07.2007,

5. Patent 2396435 published 10.08.2010,

6. Technical guidelines on the device base road pavement of stone materials, non-reinforced and reinforced inorganic astringent. VSN 184-75 / Ministry of transport construction of the USSR. M.: Transport, 1976. 36 S., paragraph 4.7.

The composition of the backfill mixture comprising acidic ground granulated blast furnace slag, superplasticizer SP-1, water and tailings wet magnetic separation of ferruginous quartzite, characterized in that the binder contains a mixture of crushed together stale sour granulated blast furnace slag, current tailings wet magnetic separation and superplasticizer SP-1, and as inert is apollites - stale tailings wet magnetic separation of ferruginous quartzite, in the following ratio, wt.%:

Astringent22,65
The placeholder55,35
WaterThe rest,

and used binder contains the following ratio of components, wt.%:
Specified slag49,8
These wastes49,8
Superplasticizer SP-10,4



 

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