Method for roasting vanadium-containing raw materials to prepare vanadium-containing clinker

A vanadium clinker and raw material technology, applied in furnaces, furnace types, rotary drum furnaces, etc., can solve the problems of uneven heating of vanadium-containing clinker, low vanadium leaching rate, easy adhesion and heating, etc., and achieve low pellet production , Improve the conversion rate of vanadium, and facilitate the effect of leaching

Inactive Publication Date: 2018-10-26
PANZHIHUA HENGHONG IRON PELLETS CO LTD
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the uneven heating of the vanadium-containing clinker prepared by direct roasting, which is easy to stick to the rotary kiln to make it unevenly heated, and the rate of vanadium transfer leaching is low

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  • Method for roasting vanadium-containing raw materials to prepare vanadium-containing clinker

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Embodiment 1

[0040] Raw materials: The typical main chemical components of the vanadium-containing raw materials (vanadium slag, stone coal, vanadium-containing dust, soda ash) selected in this embodiment are shown in Table 1.

[0041] Table 1 Typical ingredients of raw materials / (%wt)

[0042]

[0043] Soda ash is normally purchased from the market, industrial grade, Na 2 CO 3 The weight percentage is ≥98%.

[0044] The raw material vanadium slag, stone coal, vanadium-containing dust and soda ash are respectively loaded into corresponding high-level silos. The main raw material vanadium slag shall not be less than 60 tons, stone coal and vanadium-containing dust shall not be less than 10 tons, and soda ash shall not be less than 20 tons. According to the capacity of the mixer (the mixer in this embodiment adds 3 tons of materials each time) and the ratio of the feed (vanadium slag: stone coal: vanadium-containing dust: soda ash = (55~70): (8~12): (5) ~15): (12-22), this embodiment prefers vanad...

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Abstract

The invention relates to a method for roasting vanadium-containing raw materials to prepare vanadium-containing clinker. The method comprises the following steps: a. uniformly mixing vanadium slag, stone coal and caustic soda in a certain percentage by weight to prepare the raw materials; b. pressing the raw materials prepared in the step a under the pressure intensity of 15-20MPa to prepare pellets; c. charging the prepared pellets into a drying kiln and drying; d. preheating the dried pellets through a preheating rotary kiln, and then roasting the pellets through a roasting rotary kiln; ande. rapidly cooling the roasted pellets to prepare the vanadium-containing pellet clinker. According to the method disclosed by the invention, the pellets are prepared from the mixed materials, and thestone coal is added into the pellets, so that a series of problems of material entrainment due to powder bonding is effectively solved; and meanwhile, the problems of material bonding due to a too high heat release amount in a roasting process for the vanadium slag, and insufficient heat due to independent roasting for the stone coal, are also greatly solved. Carbon in the stone coal plays a lubrication role; and meanwhile, a two-stage roasting manner is adopted, so that the conversion rate for the vanadium-containing raw materials is increased.

Description

Technical field [0001] The invention relates to a method for preparing vanadium-containing clinker by roasting vanadium-containing raw materials, and belongs to the technical field of chemical vanadium extraction. Background technique [0002] Vanadium is an important strategic material. With its excellent alloy performance and catalytic effect, it is widely used in metallurgical defense cutting-edge technology and other fields. The vanadium resources in my country are mainly vanadium-titanium magnetite and vanadium-bearing coal. [0003] The Panxi area is rich in vanadium-titanium magnetite resources, the reserves are among the best, and the proven reserves have reached more than 10 billion tons. Vanadium-titanium magnetite is a multi-element symbiotic ore, mainly used as raw materials for iron, vanadium and titanium. V is currently extracted from vanadium-titanium magnetite 2 O 5 There are two main processes: 1. Directly use concentrate with sodium salt for sodium oxidation roa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/216C22B1/248C22B1/245C22B34/22
CPCC22B1/216C22B1/2406C22B1/245C22B1/248C22B34/22
Inventor 秦志波刘立新
Owner PANZHIHUA HENGHONG IRON PELLETS CO LTD
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