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Method for preparing iron oxide red from jarosite slag

A technology of jarosite slag and iron red, which is applied in the field of hydrometallurgical comprehensive recovery, can solve the problems of high energy consumption of jarosite slag, long-term stacking of jarosite slag to pollute the environment, and high load requirements of metallurgical equipment, so as to improve the The effect of leaching rate

Active Publication Date: 2016-03-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of large energy consumption for the traditional treatment of jarosite slag, high load requirements for metallurgical equipment, long-term stacking of jarosite slag to pollute the environment, inadequate recycling of valuable metals and iron resources, etc., to provide a A kind of process flow is simple, realizes the method for efficient recovery of iron from jarosite slag to the greatest extent

Method used

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  • Method for preparing iron oxide red from jarosite slag
  • Method for preparing iron oxide red from jarosite slag
  • Method for preparing iron oxide red from jarosite slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Taking the hydrometallurgical jarosite slag from a Chifeng smelter in Inner Mongolia as the raw material, its elemental composition is shown in Table 1.

[0031] Table 1 The main elements of raw materials

[0032] element

Fe

Zn

Pb

Cu

Cd

Ag

Content w / %

25.9

3.6

1.7

0.22

0.097

518.5

element

S

Mn

Si acid

As

Na

K

Content w / %

10.1

0.92

1.3

0.77

0.61

0.23

[0033] Note: The unit of silver content is g / t

[0034] (1) Weigh 400g of jarosite slag, according to volume / mass ratio (mL / g) 2:1, the amount of sulfuric acid is 1.5 times of the theoretical amount, react at a temperature of 60 ° C for 2h, and filter to obtain the hot acid leaching filtrate and heat acid leaching residue;

[0035] (2) The hot acid leaching solution is replaced by iron powder to remove copper, and sulfide to remove lead, cadmium, arsenic, H 2 O 2 Oxidation to obtain a pur...

Embodiment 2

[0041] Taking the hydrometallurgical jarosite slag from a Chifeng smelter in Inner Mongolia as the raw material, its elemental composition is shown in Table 1.

[0042] (1) Weigh 400g of jarosite slag in, by volume / mass ratio (mL / g) 4:1, the amount of sulfuric acid is 1.0 times of the theoretical amount, react 4h at a temperature of 80 ° C, filter the hot acid leaching filtrate and hot acid leaching residue;

[0043] (2) The hot acid leaching solution is replaced by iron powder to remove copper, and sulfide to remove lead, cadmium, arsenic, H 2 O 2 Oxidation to obtain a purification solution, which contains 103.0g / L of iron;

[0044] (3) the purifying solution is adjusted to pH 1.5 in the milk of lime, adding 1.5 times of urea of ​​the theoretical amount, and the reaction time is 2h under the condition of temperature 180 ℃, and the product iron red is obtained;

[0045] (4) under the condition that the hot acid leaching residue is liquid-solid ratio (mL / g) 10:1, the thioure...

Embodiment 3

[0049] Taking the hydrometallurgical jarosite slag from a Chifeng smelter in Inner Mongolia as the raw material, its elemental composition is shown in Table 1.

[0050] (1) Weigh 400g jarosite slag in, by volume / mass ratio (mL / g) 6:1, the amount of sulfuric acid is 1.8 times of the theoretical amount, react 1h at a temperature of 100 ° C, filter to obtain hot acid leaching filtrate and hot acid leaching residue;

[0051] (2) The hot acid leaching solution is replaced by iron powder to remove copper, and sulfide to remove lead, cadmium, arsenic, H 2 O 2 Oxidation to obtain a purified solution, the purified solution contains 118.6g / L of iron;

[0052] (3) the purifying solution is adjusted to pH 0.5 in the milk of lime, adding 2 times of urea of ​​the theoretical amount, and the reaction time is 3h under the condition of temperature 220 ℃ to obtain the product iron red;

[0053] (4) reacting the hot acid leaching residue at a liquid-solid ratio (mL / g) of 12:1, a thiourea conc...

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Abstract

The invention discloses a method for preparing iron oxide red from jarosite slag. The method includes the steps of leaching of jarosite slag through hot acid, impurity removing of leaching liquid and direct preparing of iron oxide red through a hydrothermal method. In the process of leaching of jarosite slag through hot acid, leaching is conducted for 1-4 hours at the temperature of 60-100 DEG C, and hot acid leaching liquid is obtained; in the process of impurity removing of leaching liquid, copper is removed through iron powder replacement, lead, cadmium and arsenic are removed through vulcanization, H<2>O<2> is oxidized, and purified liquid is obtained; in the process of direct preparing of iron oxide red through the hydrothermal method, an additive is added to the purified liquid, a reaction is conducted for 0.5-3 hours at the temperature of 120-150 DEG C, and a product of the iron oxide red is obtained. In the iron oxide red preparation process, the iron precipitation rate is higher than 93%, and the purity of the iron oxide red is higher than 97%. The method is simple in technological process, and efficient recovery of iron from the jarosite slag is achieved to the maximum degree.

Description

technical field [0001] The invention belongs to the field of comprehensive recovery of hydrometallurgy, in particular to a method for preparing iron red from jarosite slag. Background technique [0002] The potassium iron vanadium method is a widely used iron precipitation method in the zinc hydrometallurgy process. The process is simple. The iron vanadium is a crystal, which is easy to concentrate, filter and wash. Due to the small amount of iron in the jarosite slag, on the one hand it is difficult to meet the requirements of the ironmaking industry; on the other hand, the content of impurity elements Zn, Cu, Cd, Pb, Sn, As, Sb, etc. precious metals such as Au and Ag. If the huge amount of pyrite waste residues are not treated and used effectively, it will not only occupy land resources, waste mineral resources, but also cause great pollution to the environment due to the slow dissolution of harmful components. The comprehensive utilization of jarosite slag is generally ...

Claims

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Application Information

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IPC IPC(8): C01G49/06C22B11/00C22B7/04
CPCC01G49/06C22B11/044Y02P10/20
Inventor 何静杨建平杨声海王夏阳郭路路夏新兵陈永明
Owner CENT SOUTH UNIV
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