CN103170180B

CN103170180B - Water saving process for dry emission of tailings

Info

Publication number: CN103170180B
Application number: CN201310051759.8A
Authority: CN
Inventors: 刘明; 王维全; 王敬全; 杨文清; 关翔; 王振刚; 纪永东; 任新年; 张广军; 罗宏; 张龙义; 马新财
Original assignee: Baosteel Group Xinjiang Bayi Iron and Steel Co Ltd
Current assignee: Baosteel Group Xinjiang Bayi Iron and Steel Co Ltd
Priority date: 2013-02-17
Filing date: 2013-02-17
Publication date: 2015-01-21
Anticipated expiration: 2033-02-17
Also published as: CN103170180A

Abstract

The invention provides a water saving process for dry emission of tailings. The process comprises the following steps of: concentrating the tailings and depositing the sand by an efficient cyclone, namely entering coarse particles into a ceramic filter to form dry emission and simultaneously perform overflowing, namely concentrating fine particles, and entering the bottom flow into a plate-and-frame filter press to form dry emission, wherein parameter control of the efficient cyclone is as follows: the concentration of fed materials is 25%-35%, 50% of the fed materials are 200 meshes in particle size, the concentration of deposited sand is 65%, and the yield of the deposited sand is not less than 75%; and the parameter control of the plate-and-frame filter press is as follows: the filtration area is 15-40m<2>, the filtration volume is 0.256-0.765 m<3>, the quantity of filter rooms is 19-49 pcs, and the filtration pressure is 0.5 MPa.

Description

A kind of water saving art of tails dry discharge

Technical field

The present invention relates to milltailings dry type draining technology, under the condition not using tailing dam, reach the technique effect not only economizing on water but also reduce dust pollution.

Background technology

For the use water of arid biogeographic zone, mineral processing production is water consumption rich and influential family, and the water consumption in current domestic ore dressing plant is average at 1.2m ³/ more than t, old mineral water consumption average out to 1.5m ³/ more than t, by this index calculate, the total process raw ore amount adding old factory of newly founding the factory is 2,700,000 tons/year, year water consumption will reach 4,050,000 m ³/ t; Take water saving measures, design water consumption will reduce to 0.4m ³/ t, year water consumption be only 1,080,000 m ³/ t, maintains total water consumption at present, namely processes 900,000 tons of raw ores year and calculate, annual water saving 2,970,000 m ³/ t; For ensureing that the groundwater resources of this area are utilized effectively, in order to production and the domestic water of mining industry, take corresponding water saving measures, reducing water consumption, is the only way of the survival and development.

The present invention is from the design of water saving, eliminate tailing dam, mine tailing adopts secondary concentration, filters rear dry throwing technique, dry row's process is all done by all outer last person ore deposits, wherein adopt once, secondary concentration, improve the utilization ratio of recirculated water before factory as far as possible, thus reduce new water magnitude of recruitment, the water consumption of producing concentrate is down to 0.2m ³/ t; The method is that the energy-saving and cost-reducing of arid biogeographic zone enterprise has made exemplary role, has important promotional value.

Summary of the invention

The object of the invention is to: this technique adopt twice concentrated, cross and be filtered dry throwing technology, namely dry row's process is all done in all outer last person ore deposits, reaches water saving object, decreases the pollution of dust to environment.

The object of the present invention is achieved like this: a kind of water saving art of tails dry discharge, and by Tailing thickening, through efficient cyclone sand setting, namely coarse grain enters ceramic filter disposal, forms dry row; Simultaneously by overflow, namely particulate concentrates, and underflow enters plate and frame filter press and disposes, and forms dry row;

The wherein technical parameter of efficient cyclone: input concentration 25-35%, charging 200 order granularity accounts for 50%, sand setting concentration 65%, stilling productivity >=75 %;

The wherein technical parameter of ceramic filter: 200 order granularity > 85%, pulp density

55-75%；

The wherein technical parameter of plate and frame type filter-press: filter area 15-40 m ², strained volume 0.256-0.765 m ³, filter chamber quantity 19-49pcs, filter pressure 0.5MPa.

Know-why of the present invention: the comprehensive water-saving measure taked, namely all adopts dry row's mode ore drawing at mine tailing, eliminates tailing dam, has both reached water saving object and has additionally reduced environment dust pollution; Adopt once, secondary 53 meters concentrates, through efficient cyclone group, sand setting (coarse fraction) enters that ceramic filter is dry to be thrown, and the overflow (fine fraction) of cyclone enters 45 meters of concentration basins again by the dry row of filter press (as figure); Discharge reasonable in design, water consumption reaches " zero-emission ", shows technological progress.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, invention is described further.

Accompanying drawing is this mineral processing circuit schematic diagram:

As shown in the figure: through efficient cyclone, sand setting enters ceramic filter, and form dry row (siccative of moisture≤14%, Gan Dui), overflow underflow enters plate and frame filter press, forms dry row (siccative of moisture≤18%, Gan Dui).

Detailed description of the invention

Below in conjunction with embodiment, invention is described further.

Embodiment

The water saving art 1 of tails dry discharge: by Tailing thickening, through efficient cyclone, sand setting, namely coarse grain enters ceramic filter, forms dry row;

The wherein state modulator of efficient cyclone: input concentration 25% or 30% or 35%, charging 200 order granularity accounts for 50%, sand setting concentration 65%, stilling productivity >=75 %;

The wherein state modulator of ceramic filter: 200 order granularity > 85%, pulp density

55% or 65% or 75%;

The water saving art 2 of tails dry discharge: by overflow, namely particulate concentrates, and underflow enters

Enter plate and frame filter press, form dry row;

The wherein state modulator of plate and frame type filter-press: filter area 15 m ²or 30 m ²or 40 m ², strained volume 0.256 m ³or 0.765 m ³, filter chamber quantity 19 pcs or 30 pcs or 49pcs, filter pressure 0.5MPa.

The key points for operation of this technique:

1) process of mine tailing adopts and concentrates for twice, does and throw technique after namely filtering:

The mine tailing of magnetic separation of iron ore concentrate by first and second concentrated (NT-53) by efficient cyclone group (FX250-GT-10 ° × 4) coarse grain enter ceramic filter (P80/16-C80) filter finished product tailings impoundment in outdoor; All fine tailings thickener (NT-45) of making a gift to someone concentrates, then store up after filter press (BJ (MA) 630--UX) press filtration, concentrated overflow and filtration, press filtration filtrate enter selects factory's circulating water pool reuse.

2) 45 meters of concentration basins are used for Living Water process:

(1) ore dressing two sections of φ 53 meters of concentration basin underflows enter concentrate cyclone and carry out concentrated classification, and hydrocyclone sand enters ceramic filter and carried out the row of being filtered dry, and overflow enters two sections of φ, 45 meters of concentration basins and carries out concentrating and precipitating.

(2) 4 BJ (MA) 630--UX full automatic plate frame filter press and auxiliary facility are used for process two sections of φ 45 meters of concentration basin fine fraction mine tailings underflow (concentration 30-50%), filter cake be directly incorporated into mine tailing always outer row's belt or independent automobile have bad luck, filtrate returns circulation recycling.

(3) the water after process is used for water recycling in greening and conduct, finally, increases substantially the newly-built automatization level selecting factory, ensures the accurate moisturizing of per pass operation, thus reduce new water magnitude of recruitment, and productive target is that water consumption is finally down to 0.2m ³/ t.

3) automatization level of new factory:

Central Control Room is set and controls and monitor main building region and tailing filtration regional production respectively, select PLC system to carry out Centralized Monitoring to production process, establish PLC system collection, active station to monitor each technical process respectively at places such as ore dressing main building Central Control Room, recirculation pump house, lift pump room.Detected parameters sends into PLC system after converting standard signal to, completes the control overflow such as the collection of detected parameters, display, chain and warning by PLC system.Grind grading loop and main building TV monitoring and controlling, to ore deposit fixing quantity, position in storehouse Survey control.Tailing filtration dehydration Automated condtrol, concentrate filtering means dehydration Automated condtrol, equipment opens and closes at a distance, stable ore feeding, self water feeding, can mutually change by hand control and automation.

Water consumption is finally down to 0.2m ³/ t(concentrate).

Beneficial effect of the present invention: adopt cyclone, ceramic filter, filter press, structure is simple, annual water saving 2,970,000 m ³/ t, can produce economic benefit 2,713 ten thousand yuan; Eliminate tailing dam, economize on the use of funds more than 500 ten thousand yuan.

The efficient cyclone of FX250-GT-10 ° × 4 models of this process selection, is purchased from Weihai Haiwang Hydrocyclone Co., Ltd., Beijing Huayu Engineering Co., Ltd. of Zh; The ceramic filter of P80/16-C80 model, is purchased from Anshan City Special Wear-resisting equipment Plant; The plate and frame type filter-press of BJ (MA) 630-UX model, is purchased from Fucheng County Jing Xing filter press Co., Ltd.

Claims

1. a water saving art for tails dry discharge, is characterized in that: by Tailing thickening, and through efficient cyclone sand setting, namely coarse grain enters ceramic filter disposal, forms dry row; Simultaneously by overflow, namely particulate concentrates, and underflow enters plate and frame filter press and disposes, and forms dry row;

The wherein state modulator of efficient cyclone: input concentration 25-35%, charging 200 order granularity accounts for 50%, sand setting concentration 65%, stilling productivity >=75 %;

The wherein state modulator of ceramic filter: 200 order granularity > 85%, pulp density 55-75%;

The wherein state modulator of plate and frame type filter-press: filter area 15-40 m ², strained volume 0.256-0.765 m ³, filter chamber quantity 19-49pcs, filter pressure 0.5MPa.