Production method for recycling arsenic trioxide from arsenious acid sludge
A technology of arsenic trioxide and arsenous acid residue, which is applied in chemical instruments and methods, arsenic oxide/arsenic hydroxide/oxyacid arsenic, arsenic compounds, etc. and other problems, to solve the kiln body corrosion problem, the production process and process are simple and easy to operate, and it is easy to make and purchase.
Active Publication Date: 2021-10-08
SHANDONG HUMON SMELTING
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although this method realizes the harmless disposal of arsenic-containing materials, it cannot recover some valuable elements, and the disposal of vitrified bodies also requires a large amount of land
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] For better understanding and implementation, a production method for recovering arsenic trioxide from arsenous slag is described in detail below, and the specific steps include:
[0038] The arsenous acid slag produced by the copper removal acid leaching slag of an enterprise contains 21.5% arsenic, 1.02% copper, 4.18% lead, and 0.47% zinc. The material contains high arsenic and many valuable metal elements that can be recovered. Granulator granulation, evenly spread binder and 40% dilute sulfuric acid, binder preparation ratio: binder: water = 1:20, sulfuric acid (in the form of H 2 SO 4The addition amount is 250kg / t, so that the particle size is 5~10mm, the granulation amount is 1.5t / h, and it is added to the rotary drying kiln while granulating. The outlet temperature of the rotary kiln is controlled at 110°C, and the output is conveyed to the roasting rotary kiln through a scraper machine. The temperature of the front section of the roasting rotary kiln is controll...
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
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a production method for recovering arsenic trioxide from arsenious acid sludge. The production method comprises the following steps: granulating the arsenious acid sludge generated in a nonferrous smelting production process through a disc granulator, and adding dilute sulphuric acid and a binder in a granulating process; allowing the above materials to enter a rotary drying kiln for drying; enabling the dried materials to enter a rotary kiln for acidification roasting, and allowing arsenic trioxide to enter flue gas; enabling the flue gas to enter a dust settling chamber after being dedusted by a cyclone dust collector, and collecting arsenic trioxide solids; and treating tail gas and then discharging the treated tail gas. According to the method, arsenic in the arsinous acid sludge is removed, an arsenic trioxide product is recycled, and acidified and roasted sulfuric acid sludge can be returned to a smelting system to recycle valuable metals. With the method, the stockpiling amount of the arsinous acid sludge can be reduced, and the diffusion risk of arsenic is reduced; and the method can play a great role in reducing land occupation and protecting the natural environment, and has great popularization significance in the smelting industry.
Description
technical field [0001] The invention belongs to the field of solid waste disposal, and in particular relates to a production method for recovering arsenic trioxide from arsenous slag. Background technique [0002] In the non-ferrous metal smelting process, since the raw materials will contain a certain amount of arsenic, this part of arsenic will generate volatile arsenic trioxide during the smelting process, most of which will enter the dust collection and flue gas acid system with the flue gas, and will produce a large amount of arsenic Arsenic-containing smoke, arsenic-containing smoke and arsenic-containing acid. Arsenic-containing fumes usually also contain valuable metal elements. Enterprises will use acid leaching to recover valuable metals, but a large amount of arsenous acid slag will be generated; arsenic-containing fumes will be absorbed by alkaline solution to meet the emission standards, and arsenic-containing acid will be absorbed. Lime is usually used to neut...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C01G28/00
CPCC01G28/005C01P2006/80Y02P10/20
Inventor 曲胜利董准勤曲超陈涛孙海明李辉常蕴辉李雪山袁玲玲王路川左信银
Owner SHANDONG HUMON SMELTING