A system for recovering titanium iron in acidolysis black slag

Abstract

The utility model relates to a kind of recovery system of titanium iron in acidolysis black slag, it is characterized in that, the discharge port of beating tank lower part is connected with buffer tank by black slag pump, the discharge port of buffer tank bottom is connected with the feed inlet of magnetic separator by feeding pump, the magnetic material discharge port of magnetic separator upper part is connected with titanium iron slurry tank by titanium iron slurry pump, the discharge port of titanium iron slurry tank is connected with plate-and-frame filter by conveying pump, the filtrate outlet of plate-and-frame filter is connected with filtrate storage tank, and the liquid outlet of filtrate storage tank bottom is connected with beating tank. Simple and reasonable in design, easy to operate, magnetic separation treatment is carried out on black slag, no other chemical reagent is added, and titanium iron resource recovery is realized. Meanwhile, the filtrate of titanium iron slurry after pressure filtration after recovery is beaten and reused, the use amount of production water is reduced, and it is environment-friendly.

Description

Technical Field

[0001] This utility model belongs to the field of titanium dioxide by-product recovery technology, specifically relating to a system for recovering ferroilium from acid hydrolysis slag. Background Technology

[0002] The sulfuric acid process for titanium dioxide production primarily involves crushing titanium concentrate followed by acid hydrolysis. Since the iron content in titanium concentrate can reach over 8%, when using concentrated sulfuric acid for acid hydrolysis, a portion of the concentrate is coated with passivated ferric oxide, preventing complete dissolution in the acid. This portion of the concentrate undergoes a neutralization process, resulting in the loss of this titanium resource and waste. Calculations show that each ton of titanium dioxide produces 150 kg of acid hydrolysis slag, of which 150 kg is titanium dioxide (25%). Assuming a recovery rate of 42%, each ton of titanium dioxide can recover 150 * 25% * 42% = 15.75 kg of titanium dioxide. How to recover this portion of titanium resource is a pressing issue that needs to be addressed. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a system for recovering ferroilium from acid-hydrolyzed black slag.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a system for recovering ferroilium from acid-hydrolyzed black slag, characterized in that it includes a pulping tank, a magnetic separator, and a plate and frame filter press; the discharge port at the bottom of the pulping tank is connected to a buffer tank via a black slag pump, the discharge port at the bottom of the buffer tank is connected to the inlet of the magnetic separator via a feeding pump, the magnetic material discharge port at the top of the magnetic separator is connected to a ferroilium slurry tank via a ferroilium slurry pump, the discharge port of the ferroilium slurry tank is connected to the plate and frame filter press via a conveying pump, the filtrate outlet of the plate and frame filter press is connected to a filtrate storage tank, and the filtrate outlet at the bottom of the filtrate storage tank is connected to the pulping tank.

[0005] The waste discharge outlet at the bottom of the magnetic separator is connected to the waste storage tank via a waste pump.

[0006] The filter residue outlet of the plate and frame filter press is connected to the warehouse via a belt conveyor.

[0007] The pulping tank is equipped with a stirrer.

[0008] The magnetic separator is equipped with a valve at the feed inlet for controlling the feed speed.

[0009] The beneficial effects of this invention are: simple and reasonable design, convenient operation, magnetic separation treatment of black slag without the addition of other chemical reagents, realizing the recovery of ferrotitanium resources. Simultaneously, the filtrate from the recovered ferrotitanium slurry is pulped and reused, reducing the amount of production water used and being environmentally friendly. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the present invention; In the diagram: 1-Pulping tank, 2-Buffer tank, 3-Magnetic separator, 4-Titanium iron slurry tank, 5-Waste residue storage tank, 6-Plate and frame filter press, 7-Filtrate storage tank, 8-Belt conveyor; A-Black slag pump, B-Feeding pump, C-Waste residue pump, D-Titanium iron slurry pump, E-Transfer pump. Detailed Implementation

[0011] See Figure 1 A system for recovering ferroilium from acid-hydrolyzed black slag is characterized by comprising a pulping tank 1, a magnetic separator 3, and a plate and frame filter press 6; the discharge port at the lower part of the pulping tank 1 is connected to a buffer tank 2 via a black slag pump A, the discharge port at the bottom of the buffer tank 2 is connected to the inlet of the magnetic separator 3 via a feeding pump B, the magnetic material discharge port at the upper part of the magnetic separator 3 is connected to a ferroilium slurry tank 4 via a ferroilium slurry pump D, the discharge port of the ferroilium slurry tank 4 is connected to the plate and frame filter press 6 via a conveying pump E, the filtrate outlet of the plate and frame filter press 6 is connected to a filtrate storage tank 7, and the filtrate outlet at the bottom of the filtrate storage tank 7 is connected to the pulping tank 1.

[0012] The waste discharge outlet at the bottom of the magnetic separator 3 is connected to the waste storage tank 5 via the waste pump C.

[0013] The filter residue outlet of the plate and frame filter press 6 is connected to the warehouse via a belt conveyor 8.

[0014] The pulping tank 1 is equipped with a stirrer.

[0015] The magnetic separator 3 is equipped with a valve at its feed inlet for controlling the feed speed.

[0016] Working process: After being pulped in pulping tank 1, the acid-hydrolyzed black slag is pumped by black slag pump A to buffer tank 2, and then pumped by feed pump B to magnetic separator 3 to select a portion of the ferrotitanium slurry. The ferrotitanium slurry produced by magnetic separation is discharged by ferrotitanium slurry conveying pump D to ferrotitanium slurry tank 4, and the resulting tailings are discharged by waste slag pump C to waste slag storage tank 5. The material in ferrotitanium slurry tank 4 is conveyed by conveying pump E to plate and frame filter press 6 for pressing to remove some moisture. The filtered ferrotitanium slurry is sent to the warehouse for stacking by belt conveyor 8. The filtrate from plate and frame filter press 6 goes to filtrate storage tank 7, and finally enters pulping tank 1 for use in pulping black slag.

Claims

1. A system for recovering ferroilium from acid-hydrolyzed black slag, characterized in that: The system includes a pulping tank (1), a magnetic separator (3), and a plate and frame filter press (6). The discharge port at the bottom of the pulping tank (1) is connected to a buffer tank (2) via a black slag pump (A). The discharge port at the bottom of the buffer tank (2) is connected to the inlet of the magnetic separator (3) via a feeding pump (B). The magnetic material discharge port at the top of the magnetic separator (3) is connected to a titanium-iron slurry tank (4) via a titanium-iron slurry pump (D). The discharge port of the titanium-iron slurry tank (4) is connected to the plate and frame filter press (6) via a conveying pump (E). The filtrate outlet of the plate and frame filter press (6) is connected to a filtrate storage tank (7). The filtrate outlet at the bottom of the filtrate storage tank (7) is connected to the pulping tank (1).

2. The ferroilonia recovery system from acid-hydrolyzed black slag as described in claim 1, characterized in that: The waste discharge outlet at the bottom of the magnetic separator (3) is connected to the waste storage tank (5) via a waste pump (C).

3. The ferroilonia recovery system from acid leaching slag as described in claim 1, characterized in that: The filter residue outlet of the plate and frame filter press (6) is connected to the warehouse via a belt conveyor (8).

4. The ferroilonia recovery system from acid-hydrolyzed black slag as described in claim 1, characterized in that: The pulping tank (1) is equipped with a stirrer.

5. The ferroilonia recovery system from acid-hydrolyzed black slag as described in claim 1, characterized in that: The magnetic separator (3) is equipped with a valve at the feed inlet for controlling the feed speed.

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