Low-grade titanium concentrate pretreatment system

Abstract

The utility model discloses a low -quality titanium concentrate pretreatment system, it includes the mixing tank, the second stage ore pulp tank, the belt filter, the mixing belt conveying titanium concentrate to the mixing tank, and the sulphuric acid storage tank is communicated with the mixing tank through the sulphuric acid pump, the outlet of mixing tank is communicated with the second stage ore pulp tank through the mixing pump, and the outlet of second stage ore pulp tank is communicated with the feeding end of belt filter through the ore pulp pump, and the titanium concentrate discharge port of belt filter is placed in the feeding end of transfer belt unit, and the filtrate outlet of belt filter is communicated with the filtrate tank. Advantage: utilize dilute sulphuric acid can react with the phosphorus in titanium concentrate and enter the solution, and titanium does not participate in the reaction, utilize the pretreatment technology of the utility model to remove the phosphorus in titanium ore, reach the purpose of reducing the impurity, improve the grade. After the edulcoration, chengde titanium ore can improve the use proportion in the production process of rutile type titanium dioxide, and the production raw material cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of raw material processing technology for titanium dioxide production, and in particular to a pretreatment system for low-quality titanium concentrate. Background Technology

[0002] Titanium concentrate is the main raw material for producing titanium dioxide. There are many types of titanium concentrate, and the grade and impurity content vary depending on the region. The industry generally recognizes the Panzhihua region as having the highest quality titanium concentrate, while the utilization of titanium concentrate from the Chengde region is very limited. Industry data shows that the utilization rate of Chengde ore is only about 10%.

[0003] After conducting a thorough investigation of titanium mines in Chengde, understanding their distribution and quantity, and analyzing their basic properties, it was concluded that: the quantity of titanium mines in Chengde is considerable, but most have high impurity content and low grade. The average phosphorus pentoxide content of the titanium concentrate is around 0.1%-1.0%, which is considered low-quality titanium concentrate. The phosphorus content of the directly purchased Chengde mines is too high, and the high phosphorus content of the titanium concentrate has a significant impact on the calcination quality and cannot meet the production process requirements of rutile titanium dioxide.

[0004] To reduce impurities in Chengde ore while increasing the grade of low-quality titanium concentrate in Chengde, and ultimately to increase the utilization rate of Chengde ore and maximize resource utilization, this plan is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a pretreatment system for low-quality titanium concentrate that helps reduce impurity content and improve grade.

[0006] This utility model is implemented by the following technical solution: a low-quality titanium concentrate pretreatment system, comprising a slurry mixing belt, a sulfuric acid storage tank, a sulfuric acid pump, a slurry mixing tank, a slurry mixing pump, a secondary slurry tank, a slurry pump, a belt filter, a transfer belt assembly, and a filtrate tank; the slurry mixing belt transports titanium concentrate to the slurry mixing tank, and the sulfuric acid storage tank is connected to the slurry mixing tank via the sulfuric acid pump; the outlet of the slurry mixing tank is connected to the secondary slurry tank via the slurry mixing pump, and the outlet of the secondary slurry tank is connected to the feed end of the belt filter via the slurry pump; the titanium concentrate outlet of the belt filter is located at the feed end of the transfer belt assembly, and the filtrate outlet of the belt filter is connected to the filtrate tank.

[0007] Furthermore, the transfer belt conveyor unit includes a No. 1 transfer belt and a No. 2 transfer belt connected in sequence.

[0008] Furthermore, it also includes a sulfuric acid tank and a tank pump; the sulfuric acid tank is connected to the sulfuric acid storage tank through the tank pump.

[0009] Furthermore, it also includes a filtrate pump, the inlet of which is connected to the outlet of the filtrate tank, and the outlet of which is connected to the slurry preparation tank and the re-slurry tank.

[0010] Furthermore, steam coils are installed in the slurry conditioning tank and the secondary slurry tank.

[0011] The advantages of this invention are: dilute sulfuric acid can react with phosphorus in titanium concentrate and enter the solution, while titanium does not participate in the reaction; the pretreatment technology of this invention removes phosphorus from titanium ore, thereby reducing impurities and improving grade.

[0012] After impurity removal, the efficiency of Chengde titanium ore has been improved, and the industrial structure of titanium ore raw materials for titanium dioxide production has been optimized. The impurity-removed Chengde titanium ore can be used in a larger proportion in the production process of rutile titanium dioxide, thus reducing raw material costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a system flowchart of the present invention. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1 As shown, this embodiment provides a low-quality titanium concentrate pretreatment system, which includes a slurry mixing belt, a sulfuric acid storage tank, a sulfuric acid pump, a slurry mixing tank, a slurry mixing pump, a secondary slurry tank, a slurry pump, a belt filter, a transfer belt assembly, and a filtrate tank. The titanium concentrate entering the plant is transported to the phosphate concentrate stockpile for storage. During the production process, the stockpiled titanium concentrate is transferred to the slurry mixing belt by a forklift, and the slurry mixing belt transports the titanium concentrate to the slurry mixing tank.

[0017] It also includes a sulfuric acid tank and a tank pump; the sulfuric acid tank is connected to a sulfuric acid storage tank via the tank pump, and the sulfuric acid storage tank is connected to a slurry mixing tank via the sulfuric acid pump; 93% sulfuric acid is unloaded into the sulfuric acid tank using an acid tank truck, and then transported to the sulfuric acid storage tank for storage via the tank pump. According to the process requirements and the amount of sulfuric acid needed for the pretreatment of titanium concentrate, the sulfuric acid is pumped into the slurry mixing tank, and water is added to the slurry mixing tank to initially dilute the sulfuric acid, thereby achieving premixing of titanium concentrate and sulfuric acid. The dilute sulfuric acid can react with the phosphorus in the titanium concentrate and enter the solution, while titanium cannot react. In this way, the phosphorus in the titanium concentrate can be removed using dilute sulfuric acid.

[0018] The outlet of the slurry mixing tank is connected to the secondary slurry tank via a slurry mixing pump. Both the mixing tank and the secondary slurry tank are equipped with agitators to ensure thorough mixing of the titanium concentrate and sulfuric acid. Steam coils are also installed in both tanks. To ensure the dephosphorization rate, hot steam is introduced into the steam coils to control the temperature within both tanks between 80°C and 85°C. During actual operation, temperature transmitters in both tanks monitor the material temperature in real time and provide feedback to the controller. The controller then adjusts the steam flow rate to ensure the temperature meets process requirements. In the secondary slurry tank, according to process requirements, the slurry reacts continuously for two hours at a sulfuric acid concentration of 10% and a temperature of 80°C to ensure complete reaction.

[0019] The outlet of the second-stage slurry tank is connected to the feed end of the belt filter via a slurry pump; the titanium concentrate outlet of the belt filter is located at the feeding end of the transfer belt conveyor, and the filtrate outlet of the belt filter is connected to the filtrate tank; the titanium concentrate mixed in the second-stage slurry tank is pumped to the belt filter for solid-liquid separation, and the titanium concentrate mixed with sulfuric acid is filtered and washed using the belt filter; after two stages of washing, the moisture content of the titanium concentrate filter cake is reduced to about 10%.

[0020] It also includes a filtrate pump, the inlet of which is connected to the outlet of the filtrate tank, and the outlet of which is connected to the slurry conditioning tank and the re-slurry tank. The conveyor belt unit includes conveyor belt #1 and conveyor belt #2 connected in sequence. Part of the filtrate after being filtered by the belt filter is returned to the slurry conditioning tank for recycling, and the remaining filtrate and wash water are sent to the gypsum re-slurry tank of the phosphoric acid plant. The filtered titanium concentrate is then transported to the pretreatment warehouse (gypsum warehouse) for storage via conveyor belt #1 and conveyor belt #2.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-grade titanium concentrate pre-treatment system, characterised in that, It includes a slurry mixing belt, sulfuric acid storage tank, sulfuric acid pump, slurry mixing tank, slurry mixing pump, secondary slurry tank, slurry pump, belt filter, transfer belt assembly, and filtrate tank; The titanium concentrate is transported to the mixing tank by a conveyor belt, and the sulfuric acid storage tank is connected to the mixing tank by a sulfuric acid pump. The outlet of the slurry mixing tank is connected to the second-stage slurry tank via a slurry mixing pump, and the outlet of the second-stage slurry tank is connected to the feed end of the belt filter via a slurry pump. The titanium concentrate outlet of the belt filter is located at the feeding end of the conveyor belt unit, and the filtrate outlet of the belt filter is connected to the filtrate tank.

2. The low-quality titanium concentrate pretreatment system according to claim 1, characterized in that, The conveyor belt unit consists of conveyor belt #1 and conveyor belt #2 connected in sequence.

3. The low-quality titanium concentrate pretreatment system according to claim 1, characterized in that, It also includes sulfuric acid tanks and tank pumps; the sulfuric acid tanks are connected to the sulfuric acid storage tanks via the tank pumps.

4. The low-quality titanium concentrate pretreatment system according to claim 1, characterized in that, It also includes a filtrate pump, the inlet of which is connected to the outlet of the filtrate tank, and the outlet of which is connected to the slurry preparation tank and the re-slurry tank.

5. The low-quality titanium concentrate pretreatment system according to any one of claims 1 to 4, characterized in that, Steam coils are installed in the slurry preparation tank and the second-stage slurry tank.

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