Method for preparing iron oxide red by using copper nickel slag

A technology for red iron oxide and copper-nickel slag is applied in the field of mineral resource recycling, which can solve the problems of non-recycling of pickling waste liquid, high roasting temperature and complicated process, and achieve fast and effective solid-liquid separation and high product purity. , the effect of preventing environmental pollution

Inactive Publication Date: 2014-06-04
斯莱登(北京)化工科技有限公司
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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 for dissolution, precipitation, cleaning, etc., which inevitably causes harm to the environment.
[0004] The traditional preparation method of iron oxide red is to dissolve the iron sheet in sulfuric acid, adjust the pH value to be alkaline to obtain iron hydroxide precipitation, dry and roast the obtained precipitation to obtain iron oxide red, and the cost of this method is relatively high; Chinese invention patent CN1108618A "Method for producing high-content iron oxide red pigment from iron-containing industrial slag" discloses a similar preparation method of iron oxide red. The waste acid and sulfide after u...

Method used

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  • Method for preparing iron oxide red by using copper nickel slag
  • Method for preparing iron oxide red by using copper nickel slag
  • Method for preparing iron oxide red by using copper nickel slag

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Experimental program
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Effect test

Embodiment 1

[0051] Step 1: adopt the closed-circuit grinding scheme, feed the copper-nickel slag through the vibrating feeder, and send it into the mill by the belt conveyor; after reaching the particle size requirement of 70-75%-80 mesh, it is lifted by the screw conveyor and bucket The machine is lifted to the powder silo for standby; the main component content of the copper-nickel slag is shown in Table 1; the copper waste slag that has been ground in the powder silo is weighed and then added to the first-stage leaching tank, and water is added in proportion. and sulfuric acid, the amount of sulfuric acid added is 1.1 times the theoretical molar amount of iron in the copper-nickel slag, the mass percentage concentration of sulfuric acid in the pulp is maintained at 80% during leaching, and the temperature is 50°C for 30 minutes; the pulp that has been leached in the first stage Quickly pour into the second-stage stirring leaching tank, and at the same time add water in proportion to kee...

Embodiment 2

[0060] Step 1: adopt the closed-circuit grinding scheme, feed the copper-nickel slag through the vibrating feeder, and send it into the mill by the belt conveyor; after reaching the particle size requirement of 70-75%-200 mesh, it is lifted by the screw conveyor and bucket The machine is lifted to the powder silo for standby. The main component content of copper-nickel slag is shown in Table 2; weigh 100kg of the copper waste slag that has been ground in the powder silo and add it to the first-stage leaching tank, and add water and hydrochloric acid in proportion at the same time. The amount of hydrochloric acid added is The theoretical molar amount of iron in copper-nickel slag is 0.9 times, and the mass percentage concentration of hydrochloric acid in the pulp is kept at 35% during leaching, and the temperature is 70°C for 30 minutes; the pulp that has been leached in the first stage is quickly poured into the second stage for stirring At the same time, water is added in pro...

Embodiment 3

[0068] Step 1: adopt the closed-circuit grinding scheme, feed the copper-nickel slag through the vibrating feeder, and send it into the mill by the belt conveyor; after reaching the particle size requirement of 80-85%-325 mesh, it is lifted by the screw conveyor and bucket The machine is lifted to the powder silo for standby use; the main component content of the copper-nickel slag is shown in Table 3; 100 kg of copper waste slag that has been ground in the powder silo is weighed and then added to the first-stage leaching tank, and simultaneously added in proportion Water and nitric acid, the amount of nitric acid added is 1.4 times the theoretical molar amount of iron in the copper-nickel slag, the mass percentage concentration of nitric acid in the pulp is maintained at 50% during leaching, and the temperature is 70 °C for 90 minutes; the first-stage leached The ore pulp is quickly poured into the second-stage stirring leaching tank, and water is added in proportion at the sa...

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Abstract

The invention discloses a method for preparing iron oxide red by using copper nickel slag. The method comprises the steps: sequentially performing step concentration difference leaching by using copper nickel slag as a raw material, oxidizing a leaching solution, adjusting a pH value, extracting and reversely extracting and purifying, obtaining a ferric hydroxide precipitation by using an ammonia-alkali process, and calcining at a low temperature to prepare the iron oxide red. The method for preparing the iron oxide red with high purity by using the copper nickel slag has the characteristics of low cost, small energy consumption, environmental friendliness, and high recovering rate of iron in the copper nickel slag, and meets the industrialized production requirement.

Description

technical field [0001] The invention relates to a method for preparing iron oxide red from copper-nickel slag, which belongs to the technical field of mineral resources recovery and utilization. Background technique [0002] Copper-nickel slag is a kind of industrial waste after extracting copper-containing waste. The main components of copper-nickel slag are fayalite, magnetite, copper matte and nickel-cobalt. A large amount of copper-nickel slag is produced every year in my country's chemical industry and other industries, occupying a large area of ​​land and polluting the environment. In recent years, with the enhancement of people's awareness of environmental protection, various laws and regulations on waste treatment and recycling at home and abroad have been gradually implemented, and the requirements for waste treatment are also getting higher and higher. A very effective method is to concentrate copper-nickel slag, extract iron and other useful elements, make full u...

Claims

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Application Information

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IPC IPC(8): C22B7/04C01G49/06C22B3/04C22B3/26
CPCY02P10/20
Inventor 莫红兵段金城刘耀驰
Owner 斯莱登(北京)化工科技有限公司
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