CN210546982U

CN210546982U - Causticized slag recovery processing device

Info

Publication number: CN210546982U
Application number: CN201921353247.6U
Authority: CN
Inventors: 金真
Original assignee: Baiyin Zabuye Lithium Industry Co ltd
Current assignee: Baiyin Zabuye Lithium Industry Co ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-05-19
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses a causticized slag recovery processing device, which belongs to the technical field of metallurgy and solves the problem that the causticized slag with recyclable value is directly discharged without environmental protection. The device comprises a thickener, a carbonization tank, a vacuum belt filter and a mother liquor tank, wherein the thickener is internally provided with a scraping and bending machine, the bottom of the thickener is connected with a bottom flow tank, and the bottom flow tank is connected with a feeding port of the carbonization tank; the carbonization tank is internally provided with an air inlet pipe and a stirring device, the stirring device is connected with a motor, the tail end of the air inlet pipe is connected with an aeration pipe, the other end of the air inlet pipe is connected with a carbon dioxide cylinder, a discharge hole in the outer wall of the lower part of the carbonization tank is connected with a feed inlet of the vacuum belt filter, and a vacuum liquid discharge tank of the vacuum belt filter is connected with a mother liquid tank. The utility model neutralizes the alkaline substances in the causticized slag, and the causticized slag can be reused by waste slag, thereby having good economic value; and residual lithium hydroxide can be converted into lithium carbonate, and the lithium carbonate dissolved in the mother liquor is transferred to a leaching link again, so that the water-slag double harmless treatment of the causticized slag is realized.

Description

Causticized slag recovery processing device

Technical Field

The utility model belongs to the technical field of the metallurgy, concretely relates to causticization sediment recovery processing device.

Background

Lithium concentrate of the Tibet salt lake contains 50-75% of lithium carbonate, and the balance of trona, glaserite, halite and clay minerals accounting for 3-5% of the lithium carbonate, and a small amount of sodium silicate, quartz, feldspar, tremolite and other inclusions.

The company uses the ore as a raw material to purify more than 99 percent of lithium carbonate products, adopts a lime causticization method, and has the following process flow: the lithium concentrate is ground → ore washing → causticization → separation of lithium hydroxide solution and lithium slag → evaporation concentration → impurity removal → carbon dioxide carbonization → separation and washing → lithium carbonate product.

In the prior art, the pH value of causticized slag is more than 12 after being separated by a thickener, the causticized slag is stacked in a slag yard, is transported away for self-processing and used as a raw material when required by building material processing enterprises, is a gratuitous gift, sometimes pays counter cost to the building material enterprises when the space of the slag yard is tense, and is environmentally-friendly and requires the causticized slag to be harmlessly processed. In view of the above comprehensive problems, research and development personnel provide a causticized slag recovery processing device to solve the problems proposed in the background art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a causticized slag recovery processing device to solve the problem that the causticized slag that has recycle value directly discharges and is not environmental protection.

In order to solve the above problems, the utility model discloses technical scheme does:

a causticized slag recovery processing device comprises a thickener, a carbonization tank, a vacuum belt filter and a mother liquor tank, wherein the thickener is internally provided with a scraping and bending machine, the bottom of the thickener is connected with a bottom flow tank, and the bottom flow tank is connected with a feeding port of the carbonization tank; the carbonization tank is internally provided with an air inlet pipe and a stirring device, the stirring device is connected with a motor, the tail end of the air inlet pipe is connected with an aeration pipe, the other end of the air inlet pipe is connected with a carbon dioxide cylinder, a discharge hole in the outer wall of the lower part of the carbonization tank is connected with a feed inlet of the vacuum belt filter, and a vacuum liquid discharge tank of the vacuum belt filter is connected with a mother liquid tank.

Further, a slag outlet of the vacuum belt filter is connected with a slag bin.

Furthermore, a causticized slag tank is arranged between the carbonization tank and the vacuum belt filter.

Furthermore, the mother liquor tank is connected with a heating tank.

The utility model has the advantages as follows:

(1) the utility model discloses collect the causticization end sediment in the thickener in the carbonization groove through the underflow groove, utilize intake pipe and aeration pipe to let in carbon dioxide gas to carbonization groove tank bottom, carbonize this sediment thick liquid, make its PH <12, satisfy the environmental protection requirement, send this sediment thick liquid into the vacuum belt filter again and carry out dehydration treatment, dry slag is collected to the sediment storehouse, sell to the cement factory as cement manufacture raw materials, the water that drops in the sediment thick liquid is collected in the mother liquor groove through the vacuum flowing back jar, when recycling, advance to go into the heating bath heating, return to the front end production in-process again and use as the washing water of washing ore deposit, reach sediment thick liquid water sediment separation, the two recovery of dregs of water and cyclic utilization; the arrangement of the causticized slag groove plays a role in buffering, and after the causticized slag is completely carbonized in the carbonization groove, the causticized slag is pumped in, so that the release of excessive carbon dioxide is facilitated, and the micro corrosion to the vacuum belt filter is reduced.

(2) The utility model is designed according to the characteristics of the causticized slag and the products of the enterprise, the alkaline substances in the causticized slag are neutralized, the causticized slag can be recycled, and the utility model has good economic value; and residual lithium hydroxide can be converted into lithium carbonate, and the lithium carbonate dissolved in the mother liquor is transferred to a leaching link again, so that the water-slag double harmless treatment of the causticized slag is realized.

Drawings

FIG. 1 is a schematic structural diagram of a causticized slag recovery and treatment device;

FIG. 2 is a schematic structural diagram of a carbonization tank in a causticized slag recovery processing device.

The reference numbers are as follows: 1. a carbonization tank; 11. an air inlet pipe; 12. a motor; 13. a stirring device; 14. an aeration pipe; 2. a carbon dioxide cylinder; 3. a causticizing slag tank; 4. a vacuum belt filter; 41. a vacuum liquid discharge tank; 5. a mother liquor tank; 6. a slag bin; 7. a heating tank; 8. a thickener; 81. scraping and bending machine; 9. a bottom flow groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-2, a causticized slag recovery processing device comprises a thickener 8, a carbonization tank 1, a vacuum belt filter 4 and a mother liquor tank 5, wherein a scraping and bending machine 81 is arranged in the thickener 8, the bottom of the thickener 8 is connected with a bottom flow tank 9, and the bottom flow tank 9 is connected with a feeding port of the carbonization tank 1; be equipped with intake pipe 11 and agitating unit 13 in the carbonization groove 1, agitating unit 13 is connected with motor 12, intake pipe 11 end-to-end connection has aeration pipe 14, the intake pipe 11 other end is connected with carbon dioxide gas cylinder 2, the discharge gate of the outer wall of carbonization groove 1 lower part is connected with the pan feeding mouth of vacuum belt filter 4, in order to fully release the carbon dioxide in the carbonization groove in the operation, set up causticization slag bath 3 between carbonization groove 1 and vacuum belt filter 4. The vacuum drain tank 41 of the vacuum belt filter 4 is connected to the mother liquor tank 5. The mother liquid tank 5 is connected with a heating tank 7. The slag outlet of the vacuum belt filter 4 is connected with a slag bin 6.

During operation, causticized slag is precipitated in the thickener 8, the precipitated material is gathered towards the center under the action of the bottom scraping and bending machine 81, the bottom flow pipe valve of the thickener 8 is opened at regular time, slag is discharged to enter the bottom flow groove 9 and is pumped into the carbonization tank 1, carbon dioxide gas is introduced from the carbon dioxide gas cylinder 2, and the causticized slag and the carbon dioxide are subjected to carbonization reaction to ensure that OH in the causticized slag is in carbonization reaction^-Removal of pH when<12, meeting the environmental protection requirement, sending the slag slurry into a causticization slag tank 3 for stable buffering, sending the slag slurry into a vacuum belt filter 4 for water-slag separation after excessive carbon dioxide gas is completely volatilized, collecting dry slag into a slag bin 5, selecting a machine to sell the slag slurry to a cement plant as a cement production raw material, collecting water removed from the slag slurry into a mother liquor tank 5 through a vacuum liquid discharge tank 41, pumping the water into a heating tank 7 for heating during recycling, and returning the water to the front-end production process for use as washing water for ore washing; the purposes of slag-slurry water-slag separation, water-slag double recovery and cyclic utilization are achieved.

In the pipeline for liquid conveying, a conveying pump can be arranged on a required pipeline line for realizing the conveying of the feed liquid from low to high, and the conveying pump does not need to be additionally arranged on the pipeline with the height difference and capable of automatically flowing, so that the equipment cost and the power are saved.

Claims

1. The utility model provides a causticized slag recovery processing device which characterized in that: the device comprises a thickener (8), a carbonization tank (1), a vacuum belt filter (4) and a mother liquor tank (5), wherein a scraping and bending machine (81) is arranged in the thickener (8), the bottom of the thickener (8) is connected with a bottom runner (9), and the bottom runner (9) is connected with a feeding port of the carbonization tank (1); the device is characterized in that an air inlet pipe (11) and a stirring device (13) are arranged in the carbonization tank (1), the stirring device (13) is connected with a motor (12), the end of the air inlet pipe (11) is connected with an aeration pipe (14), the other end of the air inlet pipe (11) is connected with a carbon dioxide gas bottle (2), a discharge hole in the outer wall of the lower part of the carbonization tank (1) is connected with a feed inlet of a vacuum belt filter (4), and a vacuum liquid discharge tank (41) of the vacuum belt filter (4) is connected with a mother liquid tank (5).

2. The causticized slag recovery and treatment device as recited in claim 1, wherein: the slag outlet of the vacuum belt filter (4) is connected with a slag bin (6).

3. The causticized slag recovery processing device as recited in claim 1 or 2, wherein: a causticized slag tank (3) is arranged between the carbonization tank (1) and the vacuum belt filter (4).

4. The causticized slag recovery and treatment device as recited in claim 3, wherein: the mother liquor tank (5) is connected with a heating tank (7).