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Method for recovering nickel and vanadium from waste FCC (fluid catalytic cracking) catalyst through reduction smelting

A catalyst, nickel-vanadium technology, applied in the field of harmless treatment of spent FCC catalysts, can solve the problems of difficult to achieve low-cost effective recycling, difficult iron solution treatment, high Si leaching rate, etc., to achieve low production costs and small environmental impact , The effect of strong regional adaptability

Inactive Publication Date: 2017-03-08
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The mixed acid leaching method has problems such as large acid consumption, high leaching rate of Al and Si, and difficulty in handling the obtained solution containing nickel, vanadium and iron.
[0008] In summary, the spent FCC catalyst contains nickel with a mass percentage of generally 0.3-6%, but part of the nickel in the spent FCC catalyst has been embedded in the molecular sieve lattice, and it is difficult to achieve low cost by using the above-mentioned methods in the prior art. , Pollution-free and effective recycling

Method used

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  • Method for recovering nickel and vanadium from waste FCC (fluid catalytic cracking) catalyst through reduction smelting

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Embodiment 1

[0048] A method for recovering nickel and vanadium by reduction smelting from waste FCC catalysts, using waste FCC catalysts discharged from a petroleum cracking plant in Shandong as raw material, the main elemental components of the waste FCC catalysts are shown in Table 1 below:

[0049] Table 1:

[0050] element Ni V Al 2 o 3

SiO 2

Fe Sb Ca content / % 1.30 0.27 46.00 51.00 0.46 0.36 0.23

[0051] The method comprises: taking 100g of the spent FCC catalyst, adding 6g of iron oxide concentrate with a mass fraction of 65% iron, 5g of anthracite, 20g of calcium oxide, and 5g of quartz sand, and mixing evenly to obtain a mixed material to be smelted. Put the mixed material to be smelted into a corundum crucible, cover the crucible lid, put the crucible containing the mixed material to be smelted into a high-temperature heating furnace, turn on the heating system, raise the melting temperature to 1550°C, and keep it warm for 60 minu...

Embodiment 2

[0054] A method for recovering nickel and vanadium by reducing smelting from waste FCC catalysts, using waste FCC catalysts discharged from a certain petroleum cracking plant in Hebei as raw material, the main elemental components of the waste FCC catalysts are shown in Table 2 below:

[0055] Table 2:

[0056] element Ni V al 2 o 3

SiO 2

Fe Sb Ca content / % 3.80 0.46 45.10 50.20 0.57 0.21 0.26

[0057] The method comprises: taking 100g of the spent FCC catalyst, adding 8g of iron filings, 3g of coke powder, 30g of limestone, and 8g of quartz sand, and mixing them uniformly to obtain a mixed material to be smelted. Put the mixed material to be smelted into a corundum crucible, cover the crucible lid, put the crucible containing the mixed material to be smelted into a high-temperature heating furnace, turn on the heating system, raise the melting temperature to 1575°C, keep it warm for 60 minutes, and then Cool naturally to norma...

Embodiment 3

[0060] A method for recovering nickel and vanadium by reduction smelting from waste FCC catalysts, using waste FCC catalysts discharged from a certain petroleum cracking plant in Gansu as raw material, the main elemental components of the waste FCC catalysts are shown in Table 3 below:

[0061] table 3:

[0062] element Ni V Al 2 o 3

SiO 2

Fe Sb Ca content / % 0.76 0.16 45.47 51.05 0.43 0.18 0.23

[0063]The method comprises: taking 100g of the spent FCC catalyst, adding 5g of magnetite with a mass fraction of 70% iron, 3g of charcoal, 25g of limestone, and 10g of quartz sand, and mixing evenly to obtain a mixed material to be smelted. Put the mixed material to be smelted into a corundum crucible, cover the crucible lid, put the crucible containing the mixed material to be smelted into a high-temperature heating furnace, turn on the heating system, raise the melting temperature to 1525 ° C, keep it for 90 minutes, and then Cool n...

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Abstract

The invention discloses a method for recovering nickel and vanadium from a waste FCC (fluid catalytic cracking) catalyst through reduction smelting. The method comprises steps as follows: a reducing agent, a collecting agent and a fluxing agent are added to the waste FCC catalyst, all components are mixed uniformly, and a mixed material to be smelted is obtained; the mixed material to be smelted is subjected to the reduction smelting by a smelting furnace at the smelting temperature of 1,500-1,700 DEG C for 15-30 min, and nickel-vanadium iron melt, slag melt and flue gas are obtained; the nickel-vanadium iron melt is subjected to casting by a pig casting machine to form nickel-vanadium ingot iron; the slag melt is subjected to water quenching cooling to form slag; the flue gas is purified by a flue gas purification system to be tail gas up to the standard, and then the tail gas is discharged. The method can greatly increase the recovery rate of nickel and vanadium, adopts a simple process and is low in production cost and high in geographical adaptability, and produced wastewater, waste gas and slag are non-toxic and have little influence on the environment.

Description

technical field [0001] The invention relates to the technical field of harmless treatment of waste FCC (Fluid Catalytic Cracking, fluidized catalytic cracking) catalysts in the petrochemical industry, in particular to a method for recovering nickel and vanadium from waste FCC catalysts by reduction smelting. Background technique [0002] FCC catalyst is the most used catalyst in petroleum refining process, and its main component is zeolite molecular sieve. During the catalytic cracking process of crude oil containing metals, the metal compounds in the crude oil will be completely decomposed and accumulated on the FCC catalyst; with the continuous recycling of the FCC catalyst, the metals deposited on the FCC catalyst will gradually increase, which will affect the oil quality. Therefore, it is necessary to regularly and quantitatively discharge the FCC catalyst with excess metal deposits (that is, spent FCC catalyst) and replenish fresh FCC catalyst. These waste FCC catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/02C22B34/22
CPCC22B7/001C22B23/02C22B34/225Y02P10/20
Inventor 王云阮书锋常耀超李云徐晓辉王为振黄海辉
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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