Supercharge Your Innovation With Domain-Expert AI Agents!

Directly heating and decomposing plate heat exchanging technology for alumina laterite washing

A plate heat exchange and alumina technology, which is applied in the preparation of alkali metal aluminate/alumina/aluminum hydroxide, etc., can solve the problem that the steam pipe network scheme cannot be realized, the leakage of condensed water flash tank, and the pressure fluctuation in the tank is large. and other problems, to achieve the effect of prolonging the chemical cleaning cycle, reducing the evaporation load and saving energy.

Inactive Publication Date: 2004-06-30
GUIZHOU BRANCH CHINA ALUMINUM IND
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is mainly to solve the problem of new steam condensed water secondary steam belt material due to the leakage of the heating tube bundle of the dissolution autoclave and the integration of this part of steam into the whole plant 6 × 10 5 During pa steam pipe network, the condensate flash tank vibrates seriously, and the pressure fluctuation in the tank causes the dissolution unit to trip and stop, so that the originally designed dissolution new steam condensate secondary steam is merged into the whole plant 6×10 5 The problem that the scheme of pa steam pipe network cannot be realized

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
  • Directly heating and decomposing plate heat exchanging technology for alumina laterite washing
  • Directly heating and decomposing plate heat exchanging technology for alumina laterite washing
  • Directly heating and decomposing plate heat exchanging technology for alumina laterite washing

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0057] Dissolution of new steam condensed water secondary steam: temperature 165°C, pressure 6×10 5 pa, flow rate 25t / h

[0058] Among them, 15t / h is sent for evaporation, and 10t / h is sent for sedimentation and washing

[0059] Red mud washing and settling tank temperature: 100°C for one wash

[0060] Second wash 98℃

[0061] Three washes at 90°C

[0062] Plate heat exchange: Semen temperature: Plate inlet 108°C Level III outlet 75°C Plate outlet 62°C

[0063] Mother liquor temperature: Plate inlet: 55°C

[0064] Plate outlet: 95°C

example 2

[0066] Dissolution of new steam condensed water secondary steam: temperature 145°C pressure 3×10 5 pa flow 20t / h

[0067] Red mud washing and settling tank temperature: 95°C for one wash

[0068] Second wash at 95°C

[0069] Three washes at 85°C

[0070] Plate heat exchange: semen temperature: plate inlet 105°C, stage III outlet 65°C, plate outlet 58°C

[0071] Mother liquor temperature: Plate inlet: 50°C

[0072] Plate outlet: 92°C

[0073] The implementation of the present invention not only makes full use of the secondary steam of alumina dissolution, saves energy, but also finds a new process for red mud sedimentation washing and decomposition plate heat exchange, and simultaneously simplifies the process flow of these processes, improves operating conditions, and technology The index is optimized, so that the temperature of the evaporation stock solution is raised from 80°C to 92°C, reaching th...

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

A technological process uses the newly digested steam and the secondary water condensing steam in heating red mud washing system and as evaporation heat source in the mode of leading secondary steam to red mud settling and washing system. In the process scheme, the whole concentrate liquid is used to exchange heat with mother liquor and water. The present invention utilizes fully the secondary steam after alumina digestion to raise the temperature of original liquor to be evaporated from 80 deg.c to 92 deg.c and results in obvious energy saving effect so as to reach the present highest international level.

Description

Technical field: [0001] The invention relates to a process of extracting metal compounds from ores or concentrates by wet method, especially in inorganic alkali solution, washing alumina red mud, directly heating and decomposing plate heat exchange technology. Background technique: [0002] There are two main methods of alumina production: Bayer method and sintering method. Among them, the Bayer method uses bauxite, caustic soda and lime as the main raw materials. The bauxite and mother liquor are ground into qualified raw ore pulp through the raw material mill and sent to the dissolution. Under the action of high temperature, high pressure and high alkali concentration, the alumina in the ore Into the solution, its insoluble matter is red mud. After the stripping pulp is separated, the red mud is washed and filtered to recover the attached alkali and then discharged; the solution is purified to obtain semen. After the semen is cooled down, crystal seeds are added to decom...

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): C01F7/06
Inventor 甘国耀刘保伟胡玉波刘孟端陈广展
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com