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Method for treating hydrochloric acid leachate of ferrotitanium materials

A hydrochloric acid leaching and leaching technology, which is applied in the field of hydrometallurgy, can solve the problem of large amount of incineration

Inactive Publication Date: 2012-02-15
沙立林 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] The purpose of the present invention is to provide a treatment method for the leachate in the ferro-titanium material leaching process, so as to solve the problem that during the hydrochloric acid leaching process of the ferro-titanium material, the incineration amount of the leached mother liquor is too much, and the incineration energy consumption accounts for 65-75% of the whole process left and right questions

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  • Method for treating hydrochloric acid leachate of ferrotitanium materials
  • Method for treating hydrochloric acid leachate of ferrotitanium materials
  • Method for treating hydrochloric acid leachate of ferrotitanium materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] Embodiment 1 directly leaches titanium concentrate hydrochloric acid and adopts direct heating (referring to image 3 )

[0128] The main chemical composition of the rock-type low-oxide titanium concentrate in Panxi area is shown in Table 7.

[0129] Table 7. Main chemical composition of Panzhihua rock-type low-oxide titanium concentrate (wt.%)

[0130] ingredients

al 2 o 3

CaO

TF

MgO

SiO 2

TiO 2

V 2 o 5

Raw ore (titanium concentrate)

0.9

0.81

33.14

2.4

3.41

47.64

0.1

[0131] The hydrochloric acid pressure direct leaching of titanium concentrate generally adopts the leaching solution with the mass concentration of hydrochloric acid of 20% and the leaching temperature of 120 to 150°C.

[0132] The direct leaching of titanium concentrate with hydrochloric acid is characterized by fast leaching speed, high leaching rate, high leaching temperature, and serious produc...

Embodiment 2

[0140] Embodiment 2 titanium concentrate hydrochloric acid direct leaching and adopts indirect heating (referring to Figure 4 )

[0141] In this example, titanium concentrate is directly leached with hydrochloric acid and indirect heating is adopted. The difference from Example 1 lies in the heating method. When indirect heating is used, the leaching solution is not diluted. Now, the mass concentration of hydrochloric acid produced and recovered by the Ruther method is consistent with the mass concentration of hydrochloric acid required by the leaching solution ⑦, so it is not necessary to increase the hydrochloric acid concentration process as in Example 1. The specific process is as Figure 4 shown.

Embodiment 3

[0142] Embodiment 3 modified titanium concentrate hydrochloric acid atmospheric pressure leaching and adopts indirect heating (referring to figure 2 )

[0143] In order to control product refinement, improve the leaching rate of iron and make the leaching process easier to control, oxidation-reduction methods are often used to modify ilmenite. Firstly, the ilmenite is oxidized to oxidize the divalent iron in the ilmenite to ferric iron, and then the ferric iron is reduced to ferrous iron. The modified ilmenite is leached at normal pressure at 90 to 110° C. and 18 to 22% hydrochloric acid mass concentration. Because the leaching temperature is low, the heating method can be maintained by preheating the leaching solution and indirect heating. The specific process is as figure 2 shown.

[0144] For ilmenite with a higher degree of oxidation, such as sand-type ilmenite, this process is preferred to treat the leaching mother liquor.

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Abstract

The invention provides a method for treating hydrochloric acid leachate of ferrotitanium materials. The method comprises the following steps of: dividing and burning leached mother liquid which is obtained by leaching the ferrotitanium materials by using hydrochloric acid leaching liquid; recovering hydrogen chloride obtained by burning for regeneration and cyclic utilization of the leaching liquid. By the method provided by the invention, the leachate is divided according to material balance of the leach elements (mainly comprising iron) of the hydrochloric acid leachate; and one part of theleachate after division is burned and the other part of the leachate is directly or indirectly absorbed by the hydrochloric acid to return to the leaching procedure, so that completely closed circuitcirculation is formed. By the method provided by the invention, the defect of overlarge energy consumption in the burning procedure after the ferrotitanium materials are leached by the conventional hydrochloric acid can be overcome and the burning quantity of the leached mother liquid can be reduced by 40 to 55 percent, so that the energy consumption of the whole process can be reduced by 35 to 45 percent. The method has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, in particular, the invention relates to a method for treating leachate when hydrochloric acid is leaching ferro-titanium materials. Background technique [0002] There have been more than 30 years of history in my country in the study of leaching ferro-titanium materials with hydrochloric acid, and a variety of leaching processes have been developed, some of which are relatively mature, such as pre-oxidation-fluidized atmospheric pressure hydrochloric acid leaching, selection Metallurgical combined pressure hydrochloric acid leaching method, direct pressure hydrochloric acid leaching method and oxidation-reduction atmospheric pressure hydrochloric acid leaching method. However, until now, these processes have not been industrialized, and one of the main reasons is that the cost of treating leachate is too high. For example, at present, the whole leachate spray incineration method (or Ruther method)...

Claims

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Application Information

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IPC IPC(8): C22B3/44C22B3/10C22B34/12
Inventor 沙立林陈树忠
Owner 沙立林
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