Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF7 Cites 8 Cited by
  • 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 use in this method are discharged into the external environment, causing serious environmental pollution. Pollution
In the Chinese Invention Patent Publication No. CN1434078, ferric salt is used as raw material, soluble alkali is added, and nano-iron oxide red is produced through processes such as stirring and heating. The production process must go through a washing process, and the obtained pickling waste liquid has no recycling value. , easy to cause secondary pollution after direct discharge; in the Chinese invention patent publication number CN87103373, iron red and ammonium sulfate are produced from sulfuric acid pickling waste liquid. Iron red, high roasting temperature, long time and high energy consumption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com