CN102826705B

CN102826705B - Treatment method for tail slurry of blast furnace dust

Info

Publication number: CN102826705B
Application number: CN201210355996.9A
Authority: CN
Inventors: 莫明姣; 潘智斌; 张庆忠; 龙顺红; 卢山; 周永新; 刘舜; 郑文辉
Original assignee: LIUZHOU HUANYUANLI ENVIRONMENT RESOURCE TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: Guangxi Liuzhou environmental Limited by Share Ltd
Priority date: 2012-09-24
Filing date: 2012-09-24
Publication date: 2014-07-09
Anticipated expiration: 2032-09-24
Also published as: CN102826705A

Abstract

The invention discloses a treatment method for tail slurry of blast furnace dust, and relates to the field of metallurgical technologies. The method comprises the following steps of: pumping the tail slurry into a grit-water splitter so as to separate out coarse slags and low mud sewage, and collecting the coarse slags; feeding the low mud sewage into a mud-water separator, and dripping a flocculant into the mud-water separator, so that scattered fine particles form metal-containing flocculates; adsorbing and separating out the flocculates by using a magnetic disc of the mud-water separator, separating out water, gathering the flocculates so as to form fine slags, and collecting the fine slags; and feeding the separated water into a reservoir for standby. Compared with the prior art, 25-30 tons of tail mud products can be treated per hour, and the treatment method can be operated just by a person, thereby reducing the labor intensity of workers; and the method is high in separation efficiency and good in separation effect, the separated clean water can be recycled, and an effect of wastewater zero-discharging can be achieved.

Description

The treatment process of blast furnace dedusting ash tail slurry

Technical field

The present invention relates to control technology for gold field, the processing method that especially a kind of tail slurry producing for the exhaust gas dust treating processes that contains iron powder and coke that iron-making production is produced is processed again.

Background technology

At present, be all generally by the blast furnace dedusting ash pulping that adds water to the treatment process of blast furnace dedusting ash, allow slurry separate after first, second flotation and obtain high-grade coke powder; And the more slurry of iron content out in the first step, second stage flotation machine is pumped into first and second grade of spiral chute again, after gravity preparation, magnetic separation, isolate respectively high-grade iron powder; Blast furnace dedusting ash tail slurry tail mud product of gained after press filtration last after above multipass sort is also the raw material that high-quality external combustion is baked bricks.The treatment process of common blast furnace dedusting ash tail slurry is to dry sale after being manually squeezed into cake with pressing machine.This treatment process to blast furnace dedusting ash tail slurry has following deficiency: the water 1, going out after the extruding of blast furnace dedusting ash tail slurry pressing machine still contains a certain amount of carbon and iron and other impurity, more muddy; 2, need many people to operate, workman's labour intensity is large.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind for the treatment of process of blast furnace dedusting ash tail slurry, and this method can solve the not good and large problem of labour intensity of prior art treatment effect.

The technical scheme that technical solution problem of the present invention adopts is: the processing of this blast furnace dedusting ash tail slurry

Method comprises the following steps:

A, tail slurry is pumped into sand water separator, isolate thick slag and low dirt water, collect thick slag;

B, low dirt water is sent into separator for mud and water, to the throw out that splashes into flocculation agent in separator for mud and water and make formation such as the particulate that disperses contain metal, separator for mud and water disk fractionation by adsorption goes out described throw out, separation water outlet, throw out set forms thin slag, collects this thin slag;

C, that the water of separating enters water reservoir is for subsequent use.

In the technical scheme of the treatment process of above-mentioned blast furnace dedusting ash tail slurry, technical scheme can also be more specifically: the flocculation agent splashing in B step is 0.008% of low dirt water weight.

Further, the ratio of the box height of described sand water separator and width is 2:1.

Owing to having adopted technique scheme, compared with prior art, the beneficial effect having is in the present invention:

1, adopt mechanize mode to separate tail slurry, its separation efficiency is high, good separating effect, and isolated clear water can be recycled, and reaches wastewater zero discharge; 2, the tail mud product 25-30 ton of processing per hour, only needs 1 people to operate, and has alleviated workman's labour intensity.

Accompanying drawing explanation

Fig. 1 is the structural representation of the sand water separator of the embodiment of the present invention.

Fig. 2 is the left view of Fig. 1.

Embodiment

The treatment process of this blast furnace dedusting ash tail slurry, comprises the following steps: first tail slurry is pumped into sand water separator, isolate thick slag and low dirt water, collect thick slag; The box height H of sand water separator and the ratio of width W are preferably 2:1, as shown in Figure 1 and Figure 2; Low dirt water is sent into mud water segregator again, the throw out that makes the formation such as the particulate that disperses contain metal to 0.008% the flocculation agent that splashes into low dirt water weight in separator for mud and water, separator for mud and water disk fractionation by adsorption goes out described throw out, separate water outlet, throw out set forms thin slag, collects this thin slag; The thick slag of collecting and thin slag are tail mud product.It is for subsequent use that the water of separating enters water reservoir.

The treatment process tail mud product 25-30 ton of processing per hour of this blast furnace dedusting ash tail slurry, only needs 1 people to operate, and has alleviated workman's labour intensity; Separation efficiency is high, good separating effect, and isolated clear water can be recycled, and reaches wastewater zero discharge.

Claims

1. a treatment process for blast furnace dedusting ash tail slurry, is characterized in that comprising the following steps:

B, low dirt water is sent into separator for mud and water, make the particulate disperseing form the throw out that contains metal to splashing into flocculation agent in separator for mud and water, separator for mud and water disk fractionation by adsorption goes out described throw out, separation water outlet, throw out set forms thin slag, collects this thin slag;

C, that the water of separating enters water reservoir is for subsequent use.

2. the treatment process of blast furnace dedusting ash tail slurry according to claim 1, is characterized in that: the flocculation agent splashing in B step is 0.008% of low dirt water weight.

3. the treatment process of blast furnace dedusting ash tail slurry according to claim 1 and 2, is characterized in that: the ratio of the box height of described sand water separator and width is 2:1.