CN1295178C

CN1295178C - Method and system for treating high sulfur contained tails as binding filler aggregates

Info

Publication number: CN1295178C
Application number: CNB200410023346XA
Authority: CN
Inventors: 王新民; 张钦礼; 黎全; 邓金灿; 陈嘉生; 过江
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2004-06-25
Filing date: 2004-06-25
Publication date: 2007-01-17
Anticipated expiration: 2024-06-25
Also published as: CN1712379A

Abstract

The present invention belongs to the field of mining, particularly to a processing method of using high-sulfur tailings generated from concentration plants as cemented filling aggregate and a processing apparatus thereof. The method of the present invention comprises: fly ash (accounting for 1 to 50% of the total mass of the mixed filling material) is added to a mixture of cement and high-sulfur tailings to prepare filling mortar, and the mass concentration of the filling mortar is from 50% to 80%. Since the high-sulfur tailings are processed by the added fly ash, the present invention has the advantages of simple technique and easy operation, reduces the consumption of cement and omits the complicated desulfurizing technique; the present invention enhance the long-term strength of the filling body and reduces the water seepage amount so as to reduce the pollution underground. Since the fly ash scarcely reacts in a hydration mode, the early strength of the cemented filling body of the fly ash is not high, and the later strength of the filling body is obviously enhanced; after the fly ash is added, the water seepage amount is obviously reduced so as to reduce the pollution underground.

Description

The high-sulfur tailings is as the treatment process and the treatment system of consolidated fill aggregate

Technical field:

The invention belongs to field of mining, especially the high-sulfur tailings that the dressing-works is produced is as the treatment process and the treatment unit of consolidated fill aggregate.

Background technology:

A gordian technique of cemented filling method utilizes cemented filling material to handle the dead zone exactly.Owing to contain sulphur in the tailings of many mines, even, cause in the cemented filling material consolidation process, the sulfate ion (SO that the sulphur oxidation generates up to 10-25% ₄), corrode cement and produce the vitriol of indissoluble, make the cemented fill volumetric expansion, cause that obturator destroys; Generally the sulfur method of Shi Yonging is too high because of cost, is difficult to use in to handle excessive sulphur in the tailings.

Summary of the invention:

The objective of the invention is: eliminate the destruction of sulphur excessive in the tailings of mine, improve strength of filling mass, reduce filling cost cemented fill.

The present invention adopts in cement, the high-sulfur tailings compound for achieving the above object, and additional proportion is the flyash of the 1-50% of mixed filling material total mass, preparation filling mortar, and filling slurry mass concentration is 50%-80%.

And the high-sulfur tailings is set as the treatment system of consolidated fill aggregate, it is by the storage and the delivery system of high-sulfur tailings, cement, flyash, waterworks, and mixing and stirring system and filling pipeline system form, and it is characterized in that:

1. the high-sulfur tailings in the tailings storehouse 1 unloads in conveyor 2, is transported to vibratory screening apparatus 3, funnel 4 enters agitation vat 8;

2. the cement in the cement bin 5 enters agitation vat 8 via worm conveyor 7;

3. the flyash in the flyash storehouse 10 enters same agitation vat 8 via worm conveyor 7;

1. the pulping water injects agitation vat by pond 6 through water pipe;

5. high-sulfur tailings, cement, flyash fully stir after pipeline self is delivered to and wait to fill dead zone 9.

Advantage of the present invention and positively effect fully show:

1. utilize the light porous structure and the dispersing characteristic of flyash, be the later stage vulcanization reaction resultant space that affords redress; Utilize the hydration reaction resultant of activeconstituents in the flyash that the characteristic of moderate finite deformation ability is arranged, suppress the destruction that obturator takes place because of volumetric expansion.

2. handle the high-sulfur tailings by adding flyash, technology is simple, reduces the cement consumption, under the condition that guarantees filling quality, reduces filling cost; Save complicated sulfur removal technology, easy and simple to handle.

3. because flyash has good suspension property, can suppress the sedimentation of filling aggregate in transport pipe, thereby significantly improve the transportation performance of filling slurry, the wearing and tearing that alleviate filling pipeline.

4. improved the longterm strength of obturator, bleeding quantity reduces, and pollutes thereby alleviate the down-hole.Hydration reaction takes place in the starting stage in flyash hardly, thereby flyash cemented fill early strength is not high, significantly improves the later strength of obturator; After adding flyash, bleeding quantity significantly reduces, and has alleviated the down-hole pollution.

Description of drawings:

Fig. 1: the treatment unit structural representation of high-sulfur tail consolidated fill aggregate

Numbering meaning in the accompanying drawing:

Tailings storehouse 1 rotary conveyor (or worm conveyor) 2 vibratory screening apparatuss 3 funnels 4 cement bins 5 ponds 6 worm conveyors, 7 agitation vats 8 wait to fill 9 flyash storehouses 10, dead zone

Embodiment:

Fig. 1 has described the treatment system of high-sulfur tailings as the glued aggregate of filling, by the storage and the delivery system of high-sulfur tailings, cement, flyash, and waterworks, mixing and stirring system and filling pipeline system form:

1. the high-sulfur tailings stores and delivery system

The high-sulfur tailings is stored in the tailings storehouse 1, and tailings storehouse 1 can be vertical, also can be horizontal;

Tailings in the vertical tailings storehouse 1 pulping in the sand storehouse directly enters agitation vat 8;

Tailings in the horizontal tailings storehouse 1 is put sand continuously by funnel 4, and also available scraper is put sand from the concentrated sand mouth interruption of putting that is located at the end; The high-sulfur tailings of emitting from tailings storehouse 1 is carried by conveyor 2 or worm conveyor, enters agitation vat 8 through vibratory screening apparatus 3, funnel 4 after rejecting the large granular impurity that may cause line clogging.

2. cement stores and delivery system

Cement is stored in the vertical cement storehouse 5, emits through star-like or apron feeder metering, by transfer roller 7, it is sent into agitation vat 8.

3. flyash stores and delivery system

Flyash in the flyash storage warehouse 10 is emitted through star-like or apron feeder metering, enters agitation vat 8 through transfer roller 7.

4. waterworks

The pond 6 of pulping water by being located at eminence utilizes pressure reduction gravity flow to be delivered to agitation vat 8, or for ease of the conveying of tailings, also can feed water in worm conveyor 2.

5. mixing and stirring system

High-sulfur tailings, cement, flyash in agitation vat 8 by powerful mechanical stirring, and by adjusting service discharge control paste consistency.

6. filling pipeline system

The filling slurry that stirs is transported to by flow by gravity with pipeline and waits to fill dead zone 9.

The present invention's (the high-sulfur tailings is as the treatment process and the treatment system of consolidated fill aggregate) has been applied to mining, and effect is remarkable:

Peak, Guangxi Mining Limited Company adopts in the mechanize to the horizontal stratification cemented filling method, its high-grade tin of back production, lead, zinc, antimony polymetallic deposit.Contain sulphur in its tailings up to 25%, owing to adopt treatment process and the treatment system of high-sulfur tailings of the present invention as the consolidated fill aggregate, cement, flyash, high-sulfur tailings were pressed the quality proportioning 1: 2: 6 or 1: 2: 8, slurry mass concentration 70%, after carrying out the slurrying filling, the obturator final strength obviously improves, and uniaxial compressive strength reached 3-4MPa in 3 months, it is good that obturator keeps, and disintegration phenomenon do not occur.

Claims

1. the high-sulfur tailings is characterized in that as the treatment process of glued filler aggregate: in cement and high-sulfur tailings compound, add the flyash of the 1-50% of compound total mass, and preparation filling mortar, filling mortar mass concentration is 50-80%.