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A kind of desulfurization method of acid process lithium slag powder and application of desulfurization lithium slag powder

A lithium slag powder, acid method technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of resource waste, environmental pollution, etc., to save resources, protect the environment, and reduce concrete cracking. Effect

Active Publication Date: 2020-10-27
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of desulfurization method of acid process lithium slag powder and the application of desulfurization lithium slag powder thereof, the desulfurization lithium slag powder obtained after the desulfurization process through the desulfurization method can be further applied to concrete, and is well Solve the problems of resource waste and environmental pollution caused by accumulation or landfill treatment

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  • A kind of desulfurization method of acid process lithium slag powder and application of desulfurization lithium slag powder
  • A kind of desulfurization method of acid process lithium slag powder and application of desulfurization lithium slag powder
  • A kind of desulfurization method of acid process lithium slag powder and application of desulfurization lithium slag powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1～12

[0035] According to the mass percentage, the composition of acid lithium slag powder is: SiO 2 55.8%, Al 2 o 3 25.2%, SO 3 10%, CaO7%, Fe 2 o 3 0.7%, K 2 O 0.8% and unavoidable impurities;

[0036] The acid method lithium slag powder and the fat coal powder are mixed (the mass ratio of the fat coal powder to the acid method lithium slag powder is m%, m=0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5 and 6) Put it in a muffle furnace, raise the temperature to 700°C at a rate of 10°C / min, keep it warm for 120min, and cool it down to room temperature naturally to obtain desulfurized lithium slag powder;

[0037] Test the sulfur content (sulfur trioxide content) of described desulfurization lithium slag powder, test result is as shown in table 1:

[0038] Table 1 The sulfur content and desulfurization rate of the desulfurized lithium slag powder obtained under different amounts of fat coal powder in Examples 1-12

[0039] Example m Sulfur content (%) Desulfuriza...

Embodiment 13～24

[0041] According to the mass percentage, the composition of acid lithium slag powder is: SiO 2 55.8%, Al 2 o 3 25.2%, SO 3 10%, CaO7%, Fe 2 o 3 0.7%, K 2 O 0.8% and unavoidable impurities;

[0042]The acid method lithium slag powder and the fat coal powder are mixed (the mass ratio of the fat coal powder to the acid method lithium slag powder is m%, m=0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5 and 6) Put it in a muffle furnace, raise the temperature to 800°C at a rate of 10°C / min, keep it warm for 120min, and cool it down to room temperature naturally to obtain desulfurized lithium slag powder;

[0043] Test the sulfur content (sulfur trioxide content) of described desulfurization lithium slag powder, test result is as shown in table 2:

[0044] Table 2 The sulfur content and desulfurization rate of the desulfurized lithium slag powder obtained under different amounts of fat coal powder in Examples 13-24

[0045] Example m Sulfur content (%) Desulfuriza...

Embodiment 25～36

[0047] According to the mass percentage, the composition of acid lithium slag powder is: SiO 2 55.8%, Al 2 o 3 25.2%, SO 3 10%, CaO7%, Fe 2 o 3 0.7%, K 2 O 0.8% and unavoidable impurities;

[0048] The acid method lithium slag powder and the fat coal powder are mixed (the mass ratio of the fat coal powder to the acid method lithium slag powder is m%, m=0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5 and 6) Put it in a muffle furnace, raise the temperature to 900°C at a rate of 10°C / min, keep it warm for 120min, and cool it down to room temperature naturally to obtain desulfurized lithium slag powder;

[0049] Test the sulfur content (sulfur trioxide content) of described desulfurization lithium slag powder, test result is as shown in table 3:

[0050] Table 3 The sulfur content and desulfurization rate of the desulfurized lithium slag powder obtained under different amounts of fat coal powder in Examples 25-36

[0051]

[0052]

[0053] The desulfurization rates of E...

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Abstract

The invention relates to the technical field of desulfurized lithium slag powder, in particular to a desulfurization method of acid-process lithium slag powder and application of the desulfurized lithium slag powder from the method. The desulfurization method of the acid-process lithium slag powder comprises the following steps: mixing the acid-process lithium slag powder and fat coal powder, andcarrying out heat treatment to obtain the desulfurized lithium slag powder. According to the invention, the acid-process lithium slag powder is subjected to heat treatment; firstly, the activity of the lithium slag powder is enhanced; secondly, the sulfur trioxide content in the acid-process lithium slag powder can be reduced to below the standard of a concrete admixture by mixing the acid-processlithium slag powder with fat coal powder and carrying out heat treatment, the desulfurized lithium slag powder obtained after desulfurization treatment can be successfully applied to concrete, the performance of the concrete is harmless, and meanwhile, the cement consumption can be reduced by 10%-60%. Meanwhile, the problem of accumulation of the lithium slag solid waste is solved, and the effects of protecting the environment and saving resources are achieved.

Description

technical field [0001] The invention relates to the technical field of desulfurized lithium slag powder, in particular to a desulfurization method for acid-process lithium slag powder and an application of the desulfurized lithium slag powder. Background technique [0002] Spodumene is one of the main lithium-containing minerals. Its main component is lithium aluminum silicate. Its main use is to prepare lithium salt by sulfuric acid method; and about 8 to 10 tons of acid-process lithium slag are discharged when producing one ton of lithium salt. At the same time, with the development of society, the human demand for lithium salts is increasing, the development of lithium salt industry will be more and more rapid, and the corresponding discharge of acid lithium slag will also increase day by day. [0003] At present, most of the methods to deal with lithium slag from acid process are accumulation and landfill treatment, which will lead to serious waste of resources, pollute ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/02C04B18/14
CPCC04B18/144C04B20/023Y02W30/91
Inventor 刘泽韩乐王吉祥张延博
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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