A method for producing high-quality iron oxide red pigment from laterite nickel ore acid leaching solution

A technology of iron oxide red and laterite nickel ore is applied in the field of resources and environment, which can solve the problems of enterprise burden, long process and high cost, and achieve the effects of reducing neutralization cost, improving hue and improving crystal shape.

Active Publication Date: 2018-08-07
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method requires a long process, high cost, and requires a large amount of acid or lye to participate in the reaction, and at the same time discharges a large amount of salty wastewater, which brings a serious burden to the enterprise and a huge pressure on the environment.

Method used

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  • A method for producing high-quality iron oxide red pigment from laterite nickel ore acid leaching solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for producing high-quality iron oxide red pigment with laterite nickel ore acid leaching solution, the steps are as follows:

[0026] 1) In the reactor, 1000Kg laterite nickel ore acid leaching solution, its pH=2, Fe 2 0 3 The content is 4.1wt%, heated to 60°C by feeding steam, adding 10kg of magnesium oxide neutralizer to adjust the pH=3, putting in iron oxide seeds, keeping the temperature of the reactor at 65°C, passing through air oxidant for 100 minutes to oxidize to iron oxide Stop oxidation after the color of the pigment reaches the standard;

[0027] 2) The oxidized pickling liquid enters the filter press for filtration, and the liquid enters other processes for processing. The solid is iron oxide red filter cake, and the filter cake is beaten and washed with water once;

[0028] 3) Add 15 kg of 10 wt% sodium hydroxide solution to the washed filter cake to elute the silicon with alkali at 90° C., the silicon forms sodium silicate liquid and discharge ...

Embodiment 2

[0032] A method for producing high-quality iron oxide red pigment with laterite nickel ore acid leaching solution, the steps are as follows:

[0033] 1) In the reactor, 1000kg laterite nickel ore acid leaching solution, its pH=2.6, Fe 2 0 3 The content is 5.0wt%, heated to 90°C by feeding steam, adding 12kg of magnesium hydroxide neutralizer to adjust pH = 4, putting in iron oxide seeds, keeping the temperature of the reactor at 95°C, and passing through air oxidant for 40 minutes until oxidation Stop oxidation after the color of iron pigment reaches the standard;

[0034] 2) The oxidized pickling liquid enters the filter press for filtration, and the liquid enters other processes for processing. The solid is iron oxide red filter cake, and the filter cake is beaten and washed with water once;

[0035] 3) Add 15kg of 10wt% sodium hydroxide solution to the washed filter cake, elute the silicon with alkali at 80°C, the silicon forms sodium silicate liquid and discharge it, and...

Embodiment 3

[0039] A method for producing high-quality iron oxide red pigment from laterite nickel ore acid leaching solution

[0040] 1) In the reactor, 1000kg laterite nickel ore acid leaching solution, its pH=1.5, Fe 2 0 3 The content is 3.8wt%. Heat it to 80°C with steam, add 18kg of magnesium carbonate neutralizer to adjust the pH=3.5, put in iron oxide red seeds, keep the temperature of the reactor at 85°C, and pass in air oxidant for 60 minutes to oxidize Stop oxidation after the color of iron pigment reaches the standard;

[0041] 2) The oxidized pickling liquid enters the filter press for filtration, and the liquid enters other processes for processing. The solid is iron oxide red filter cake, and the filter cake is beaten and washed with water once;

[0042] 3) add 10 wt% to the washed filter cake into 15 kg of sodium hydroxide solution to elute the silicon with alkali at 85° C., the silicon forms sodium silicate liquid and discharge it, and the filter cake enters the calcinin...

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Abstract

The invention relates to a method for producing high-quality iron oxide red pigments from a nickel laterite ore acid leaching solution. The invention provides a process for producing high-quality iron oxide red pigments by using a magnesium compound as a neutralizing agent for the weaknesses that the original iron removal methods such as a nickel laterite ore acid leaching solution yellow sodium iron vanadium method or a goethite method and the like generate a great number of iron-containing slag, a large-area land is occupied and the environment is polluted. The method has the advantages that the investment capital is less, the product quality is reliable, no novel impurity element is introduced, magnesium sulfate can be recovered from the waste solution, the comprehensive cost is greatly decreased, and the method belongs to a clean production process.

Description

technical field [0001] The invention relates to a method for producing high-quality iron oxide red pigment from laterite nickel ore acid leaching solution, which belongs to the field of resources and environment. Background technique [0002] When producing nickel by laterite nickel wet method, acid leaching with sulfuric acid (or hydrochloric acid) is commonly used. The pickling solution contains a large amount of dissolved ferric sulfate, ferrous sulfate (or ferric chloride, ferrous chloride), and the solution also contains a large amount of magnesium sulfate. , aluminum sulfate, nickel sulfate, silicon and other components; the existing methods of iron removal in acid leaching are mainly yellow sodium iron vanadium method or goethite method, which produce a large amount of iron-containing waste residue, occupy a large area of ​​land, and waste iron resources And pollute the environment. In recent years, with the improvement of the country's requirements for cleaner produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06C01F5/40
CPCC01F5/40C01G49/06
Inventor 李梅彤张柯张响张影袁文蛟
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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