Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for recovering bismuth from bismuth oxychloride waste

A technology of bismuth oxychloride and waste materials, applied in the field of resource recycling, can solve the problems of high equipment requirements, large equipment investment and high cost, and achieve the effects of low equipment requirements, improving purity and reducing impurities

Inactive Publication Date: 2021-06-22
FIRST RARE MATERIALS CO LTD
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has extremely high requirements on equipment, large equipment investment and high cost

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 recovering bismuth from bismuth oxychloride waste
  • Method for recovering bismuth from bismuth oxychloride waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1000kg of defective products of bismuth oxychloride pearl paste is put into the quartz calciner. 100L / min of air was introduced, then the temperature was raised to 500°C, and the temperature was kept for calcination for 12h. The air carries the volatilized, decomposed organics to the exhaust absorber. Collect the calcination residue in the quartz furnace. The content of bismuth in the calcined residue is 80%.

[0039] to 1m 3 Put 300kg of pure water and 380kg of 25wt% nitric acid into the enamel reaction kettle, start stirring, and raise the temperature to 60°C at the same time. Then the calcined residue collected is dropped into the reactor, and the weight of the loaded residue is 300kg. After the feeding is completed, continue the heat preservation reaction until the dissolution is complete.

[0040] After the material in the enamel kettle is completely dissolved, pour it into another 2m through the filter 3 Inside the enamel reaction, set aside.

[0041] to 2m...

Embodiment 2

[0047] 1000kg of defective products of bismuth oxychloride pearl paste is put into the quartz calciner. 100L / min of air was introduced, then the temperature was raised to 550°C, and the temperature was kept for 12 hours for calcination. The air carries the volatilized, decomposed organics to the exhaust absorber. Collect the calcination residue in the quartz furnace. The content of bismuth in the calcined residue is 79%.

[0048] to 1m 3 Put 300kg of pure water and 420kg of 30wt% nitric acid into the enamel reaction kettle, start stirring, and raise the temperature to 80°C at the same time. Then put the collected calcined residue into the reactor at a rate of 100-150kg / h, and the weight of the residue thrown in is 300kg. After the feeding is completed, continue the heat preservation reaction until the dissolution is complete.

[0049] After the material in the enamel kettle is completely dissolved, pour it into another 2m through the filter 3 Inside the enamel reaction, ...

Embodiment 3

[0056] 1000kg of defective products of bismuth oxychloride pearl paste is put into the quartz calciner. 100L / min of air was introduced, then the temperature was raised to 600°C, and the temperature was kept for calcination for 12h. The air carries the volatilized, decomposed organics to the exhaust absorber. Collect the calcination residue in the quartz furnace. The content of bismuth in the calcined residue is 78.5%.

[0057] to 1m 3 Put 300kg of pure water and 360kg of 35wt% nitric acid into the enamel reaction kettle, start stirring, and raise the temperature to 70°C at the same time. Then the calcined residue collected is dropped into the reactor, and the weight of the loaded residue is 300kg. After the feeding is completed, continue the heat preservation reaction until the dissolution is complete.

[0058] After the material in the enamel kettle is completely dissolved, pour it into another 2m through the filter 3 Inside the enamel reaction, set aside.

[0059] to ...

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 provides a method for recovering bismuth from bismuth oxychloride waste, and belongs to the technical field of resource recovery. The method comprises the following steps that the bismuth oxychloride waste is calcined at the high temperature and then is leached by the aid of nitric acid, and bismuth in the leachate is selectively precipitated to obtain basic bismuth nitrate, so that the bismuth is separated from other impurity metals. Bismuth oxide is generated in a certain alkaline environment after basic bismuth nitrate is dissolved in water. According to the method, chloride ions remain in the solution and are directly discharged to a sewage workshop, so that the interference of the chloride ions on the system is avoided. Meanwhile, a bismuth oxide product with relatively high purity can be obtained, and the recovery rate of bismuth is higher than 95%.

Description

technical field [0001] The invention belongs to the technical field of resource recovery and utilization, and in particular relates to a method for recovering bismuth from bismuth oxychloride waste. Background technique [0002] Bismuth is a rare element in the earth's crust, known as "green metal", and more than 50% of its products are used in the fields of medicine and chemical industry. Bismuth oxychloride is a white bismuth compound that is insoluble in water. It is a bismuth intermediate product obtained from anode slimes such as electrolytic tin, electrolytic copper, and electrolytic lead, and some bismuth concentrates in the wet recovery process of chloride. It is also a bismuth intermediate product. A new type of high-grade environmentally friendly pearlescent material, which has the characteristics of non-toxicity, low oil absorption, unique surface adhesion characteristics and smoothness. As an environmentally friendly pearlescent material, bismuth oxychloride wil...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/06C22B7/00C22B1/02
CPCC22B30/06C22B7/007C22B1/02Y02P10/20
Inventor 张佳王波
Owner FIRST RARE MATERIALS CO LTD