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Method for enriching vanadium and selenium in process of producing cement ingredients by using boiling furnace

A boiling furnace and enrichment technology, which is applied in chemical instruments and methods, selenium/tellurium compounds, and process efficiency improvement, etc., can solve the problems of lack of environmental protection equipment, waste of metal resources, and inability to recycle and reuse, so as to improve profit margins, The effect of avoiding pollution

Inactive Publication Date: 2013-10-02
宣恩县青龙超群矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cement in western Hunan and western Hubei is generally carbonate cement. Due to the high silicon content of stone coal, the raw ore contains 65%-70% of silicon dioxide, and the roasted slag contains more than 80% of silicon dioxide. It is used as cement ingredients. It can improve the grade of cement, so there is a great demand for this product in western Hunan and western Hubei. At present, driven by market demand and interests, there are many unorganized open-air pile burning without environmental protection equipment, SO 2 The direct discharge of such gases has caused great pollution to the environment, and a large number of forests have died in some places; what is more serious is that the content of selenium dioxide in the flue gas produced by open-air stacking is relatively high, and human and livestock will cause selenium poisoning after inhalation. Moreover, precious metals in stone coal cannot be recycled, resulting in waste of resources for metals such as vanadium and selenium

Method used

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  • Method for enriching vanadium and selenium in process of producing cement ingredients by using boiling furnace
  • Method for enriching vanadium and selenium in process of producing cement ingredients by using boiling furnace

Examples

Experimental program
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example 1

[0032] The stone coal mine in Lijiahe, Enshi area, the main component is SiO2 : 64.1%; C: 13%; S: 1.5%; Fe 2 o 3 : 3.3%; Al 2 o 3 : 7.8%; CaO0.4%; V 2 o 5 : 0.34%; Se: 0.008%; Mo: 0.02%; other trace elements 6.5%. Roasted in a boiling furnace with 8.5 tons of roasting per hour, blasting 7500m per hour 3 Air volume, generating 11000m 3 The amount of flue gas, according to the sulfur content of the ore, produces 216kg of SO per hour 2 . Add 3% CaCO purchased from quarry in stone coal pulverized process 3 After the powder was roasted at a furnace temperature of 900°C, the SO 2 Content 2200mg / Nm 3 . After being sprayed with lime water in the quartz tube tower, the sulfur content of the tail gas is measured to be 276mg / Nm 3 .

[0033] The slag outlet collected 2.57 tons of heavy slag, containing 0.18% vanadium and 0.0001% selenium. Gravity dust collection collected 3.26 tons, containing 0.38% vanadium and 0.003% selenium, and cyclone dust collection collected 0.97 ton...

example 2

[0035] The stone coal mine in Tiechangpo, Enshi area, the main component is SiO 2 : 65.29%; C: 13.3%; S: 1.7%; Fe 2 o 3 : 3.2%; Al 2 o 3 : 13.3%; CaO0.6%; V 2 o 5 : 0.47%; Se: 0.009%; Mo: 0.02%; other elements 2.65%. Roasted in a fluidized furnace with a roasting rate of 7.2 tons per hour, with a blast rate of 7300m per hour 3 Air volume, generating 10200m 3 The amount of flue gas, according to the sulfur content of the ore, produces 207kg of SO per hour 2 . Add 2.8% of quarry purchase CaCO in stone coal pulverized process 3 After the powder was roasted at a furnace temperature of 900°C, the SO 2 Content 2130mg / Nm 3 . After being sprayed with lime water in the quartz tube tower, the sulfur content of the tail gas is measured to be 262mg / Nm 3 .

[0036] The slag outlet collected 1.63 tons of heavy slag, containing 0.19% vanadium and 0.001% selenium. Gravity dust collection collected 2.53 tons, containing 0.51% vanadium and 0.0037% selenium, and cyclone dust colle...

example 3

[0038] The stone coal mine in Tunpu, Enshi area, the main component is SiO 2 : 64.67%; C: 12.8%; S: 1.9%; Fe 2 o 3 : 3.5%; Al 2 o 3 : 11.7%; CaO0.8%; V 2 o 5 : 0.43%; Se: 0.009%; Mo: 0.019%; other elements 4.24%. It is roasted in a fluidized furnace with a roasting rate of 9.3 tons per hour, and the blasting rate is 7600m per hour. 3 Air volume, generating 10900m 3 The amount of flue gas, according to the sulfur content of the ore, produces 299kg of SO per hour 2 . Add 2.9% quarry purchase CaCO in stone coal fines process 3 After the powder was roasted at a furnace temperature of 900°C, the SO 2 Content 2210mg / Nm 3 . After being sprayed with lime water in the quartz tube tower, the sulfur content of the tail gas is measured to be 292mg / Nm 3 .

[0039] The slag outlet collected 2.21 tons of heavy slag, containing 0.17% vanadium and 0.001% selenium. Gravity dust collection collected 3.06 tons, containing 0.48% of vanadium and 0.0041% of selenium, and 1.69 tons of ...

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Abstract

The invention relates to a method for enriching vanadium and selenium in the process of producing cement ingredients by using a boiling furnace. The method is characterized by comprising the following operation steps: a, adding calcium and crushing; b, roasting; c, controlling air inlet quantity; 2, enriching vanadium and selenium; and e, removing sulfur from tail gas. Compared with the prior art, the method has the following advantages: roasting is performed according to carbon in stone coal, the tail gas can be treated concentratedly, and metal such as vanadium, selenium and the like is enriched in fine ash and can serve as byproducts to be recovered , so the profit of factories is improved and environmental pollution is avoided.

Description

technical field [0001] The invention relates to a method for enriching vanadium and selenium when using a fluidized fluidized furnace to produce cement ingredients. Background technique [0002] Vanadium is an important national defense strategic material, known as "metal monosodium glutamate", widely used in metallurgy, chemical industry, aerospace, and emerging vanadium batteries and other fields. my country is relatively rich in vanadium resources, and the main vanadium-containing minerals are: vanadium-titanium magnetite and vanadium-containing stone coal. Stone coal is a kind of polymetallic carbonaceous shale. The main trace elements are compound minerals such as vanadium, selenium, aluminum, molybdenum, and iron. The stone coal reserves in Enshi area are huge, but the content of each metal has not reached Industrial smelting grade requirements. The cement in western Hunan and western Hubei is generally carbonate cement. Due to the high silicon content of stone coal,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/10C22B7/02C22B34/22C01B19/00
CPCY02P10/20
Inventor 吴昊李羚境朱友铬米泽地
Owner 宣恩县青龙超群矿业有限责任公司