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Preparation method for preparing titanium slag of sulfate process titanium dioxide

A technology of sulfuric acid method and titanium slag, applied in the field of titanium dioxide production by sulfuric acid method, can solve the problems of high iron powder addition, low acid hydrolysis rate of acid-soluble titanium slag and high cost

Inactive Publication Date: 2018-12-28
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing titanium slag for sulfuric acid process titanium dioxide, which effectively solves the problems of low acidolysis rate of acid-soluble titanium slag, high iron powder addition, and high cost

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preparation example Construction

[0013] The preparation method for the titanium slag that is used to prepare sulfuric acid process titanium dioxide comprises the following steps: a, raw material preparation: (1) raw material includes titanium concentrate and reducing agent, according to titanium slag smelting to titanium concentrate quality and reducing agent quality requirements, Titanium concentrate and reducing agent should meet: titanium concentrate contains TiO 2 The mass percentage range of the titanium concentrate is 47% to 52%, the particle size of the titanium concentrate is controlled to be 200 mesh ≥ 95%, the mass percentage range of the reducing agent fixed carbon in the reducing agent is ≥ 85%, the reducing agent particle size range is 1mm ~ 3mm ≥ 90%, 3mm ~ 5mm ≤ 8% and 0 ~ 1mm ≤ 2%, the mass percentage of titanium concentrate and reducing agent moisture content ≤ 0.2%; (2) For titanium concentrate, the corresponding impurity elements or trace elements should meet the requirements of The mass pe...

Embodiment 1

[0020] First, select titanium concentrate TiO 2 47%, particle size 200 mesh is 95%, reducing agent fixed carbon is 85%, particle size is 1mm-3mm is 91.5%, titanium concentrate and reducing agent moisture is 0.05%, V 2 o 5 0.1%, Cr 2 o 3 Trace amount, 0.95% for CaO, 4.85% for MgO, SiO 2 2.8%, Al 2 o 3 1.5%; then, mix titanium concentrate and reducing agent according to a certain proportion, and put them into the electric furnace for reduction smelting. Air temperature is 2350NM 3 / h and other comprehensive judgments, the obtained titanium slag grade is 76%; then the titanium slag is cooled, the cooling temperature is 180 ℃, and the cooling time is 10h, and the black titanite content in the titanium slag is 91%, and the rutile content is 3.5% %, the low-valent titanium content is 14.6%; then, the cooled titanium slag is crushed, and the crushed particle size is controlled at 2-10mm; then, the crushed titanium slag is ball milled to obtain a titanium slag with a particle s...

Embodiment 2

[0023] First, select titanium concentrate TiO 2 49%, particle size 200 mesh is 97%, reducing agent fixed carbon is 88%, particle size is 1mm-3mm is 96%, titanium concentrate and reducing agent moisture are 0.05%, V 2 o 5 0.1%, Cr 2 o 3 Trace amount, 0.92% for CaO, 4.05% for MgO, SiO 2 1.8%, Al 2 o 3 1.2%; then, mix the titanium concentrate and reducing agent according to a certain proportion, and put them into the electric furnace for reduction smelting. Air temperature is 2500NM 3 / h and other comprehensive judgments, the titanium slag grade is 78%; then the titanium slag is cooled, the cooling temperature is 350 ° C, and the cooling time is 8 hours, and the titanium slag has a black titanium content of 93.5% and a rutile content of 4.5% %, the low-valent titanium content is 17.2%; then, the cooled titanium slag is crushed, and the crushed particle size is controlled at 2-10mm; then, the crushed titanium slag is ball milled to obtain a titanium slag with a particle siz...

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Abstract

The invention relates to the field of sulfate process titanium dioxide, in particular to a preparation method for preparing titanium slag of sulfate process titanium dioxide. According to the preparation method, the problems that sulphate titanium slag is low in acidolysis rate, the adding amount of iron powder is high and the cost is high are effectively solved. The preparation method comprises the following steps that a, raw materials are prepared, specifically, (1) the raw materials comprise titanium concentrates and reducing agents, and (2) corresponding impurity elements or trace elementsneed to meet the mass percentage range of the titanium concentrates; b, electric furnace smelting is conducted; c, the titanium slag is cooled; d, the titanium slag is crushed; e, ball-milling is conducted; f, acidolysis is conducted; and g, a titanium slag product is obtained. By optimizing the preparation technology of the titanium slag of the sulfate process titanium dioxide, firstly, the rawmaterials of the titanium concentrates and the reducing agents are screened, and secondly, the final product is obtained through the steps of electric furnace smelting, cooling, crushing, ball-millingand acidolysis. According to the preparation method, the problems that the sulphate titanium slag is low in acidolysis rate, the adding amount of the iron powder is high and the cost is high are solved successfully, and the preparation method is especially suitable for production of preparing the titanium slag of the sulfate process titanium dioxide.

Description

technical field [0001] The invention relates to the field of sulfuric acid process titanium dioxide production, in particular to a method for preparing titanium slag for preparing sulfuric acid process titanium dioxide. Background technique [0002] The raw materials of sulfuric acid titanium dioxide mainly include ilmenite and high-titanium slag. Compared with ilmenite, using titanium slag as the raw material of sulfuric acid titanium dioxide can not only increase the production capacity of unit equipment, shorten the process flow, but also fundamentally To solve the environmental protection problems caused by ferrous sulfate, a by-product of sulfuric acid titanium dioxide. [0003] With the improvement of national environmental protection requirements, the survival pressure of sulfuric acid titanium dioxide factories is increasing. At present, some titanium dioxide production enterprises are forced to stop production or choose titanium slag as production raw materials due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C22B1/00
Inventor 李凯茂王斌韩可喜
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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