Rapid reduction process of laterite nickel ore rotary kiln
A technology of laterite nickel ore and rotary kiln, which is applied in the fields of metallurgy and material science, can solve the problems of high temperature, difficult drying and long time for reduction, so as to improve the mechanical strength of hot and cold states, reduce cracking and pulverization, and improve the The effect of production efficiency
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0036] A kind of laterite nickel ore rotary kiln rapid reduction process comprises the following steps:
[0037] (1) Take low-grade laterite nickel ore accounting for 80wt% of the total mixture (low-grade laterite nickel ore contains 18.56% iron and 1.80% nickel), and mix it with composite additives accounting for 20wt% of the total mixture to obtain a mixture. The composite additives include 15wt% water glass, 40wt% coal powder, 10wt% sodium humate and 35wt% limestone.
[0038] (2) Press the mixture into a mass to obtain a raw mass. The yield of the dough is 82.45%, the drop strength is 94%, the compressive strength of the dough is 134N / piece, and the thermal burst index is 0.50%.
[0039](3) Dry the raw dough through a shaft furnace, and then use the exhaust gas from the tail heat of the rotary kiln to preheat the dough to 950°C and then load it into the rotary kiln, and at the same time use the hot nitrogen to cool the reduction product to preheat the pulverized coal to 90...
Embodiment 2
[0043] A kind of laterite nickel ore rotary kiln rapid reduction process comprises the following steps:
[0044] (1) Take low-grade laterite nickel ore (18.56% iron and 1.80% nickel) which accounts for 85wt% of the total amount of the mixture, and mix with 15wt% composite additives to obtain a mixture. The composite additives include 15wt% water glass, 40wt% coal powder, 10wt% sodium humate and 35wt% limestone.
[0045] (2) Press the mixture into a mass to obtain a raw mass. The finished product rate of the dough is 80.35%, the drop strength is 92%, the compressive strength of the dough is 128N / piece, and the thermal burst index is 0.60%.
[0046] (3) Dry the raw agglomerate through a shaft furnace, then preheat the agglomerate to 900°C with the waste gas from the tail heat of the rotary kiln, and then load it into the rotary kiln, and preheat the coal powder to 950°C with the hot nitrogen that cools the reduction product, The coal powder is sprayed into the rotary kiln, and...
Embodiment 3
[0050] A kind of laterite nickel ore rotary kiln rapid reduction process comprises the following steps:
[0051] (1) Take the low-grade laterite nickel ore (the low-grade laterite nickel ore contains 18.56% iron and 1.80% nickel) accounting for 75wt% of the total mixture, and mix it with the composite additive accounting for 25wt% of the mixture to obtain a mixture. The composite additives include 15wt% water glass, 40wt% coal powder, 10wt% sodium humate and 35wt% limestone.
[0052] (2) Press the mixture into a mass to obtain a raw mass. The finished product rate of the dough is 84.55%, the drop strength is 96%, the compressive strength of the dough is 142N / piece, and the thermal burst index is 0.40%.
[0053] (3) Dry the raw dough through a shaft furnace, and then use the exhaust gas from the tail heat of the rotary kiln to preheat the dough to 900°C before loading it into the rotary kiln, and at the same time, use the hot nitrogen gas that cools the reduction product to pr...
PUM
Property | Measurement | Unit |
---|---|---|
density | aaaaa | aaaaa |
particle size | aaaaa | aaaaa |
particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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