Method for smelting bismuth-molybdenum or bismuth-tungsten concentrates

A smelting method and tungsten concentrate technology, applied in the smelting field of bismuth molybdenum or bismuth tungsten concentrate, can solve the problems of long process and high environmental pressure, and achieve the effects of reducing energy consumption, cleaning and efficient recovery, and avoiding difficult treatment.

Inactive Publication Date: 2013-09-18
HUNAN SHIZHUYUAN NON FERROUS METAL
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  • Abstract
  • Description
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Problems solved by technology

This method has problems such as long process and high environmental pressure.

Method used

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  • Method for smelting bismuth-molybdenum or bismuth-tungsten concentrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The composition of molybdenum bismuth concentrate provided is: Bi 21.02%, Mo 5.33%, Fe 13.24%, SiO 2 14.56%, Cu 0.77%, S 27.2%.

[0048] Get above-mentioned molybdenum bismuth concentrate powder 100g, and 70g ZnO, 300g Na 2 CO 3 and 8g of pulverized coal were evenly mixed, and smelted at 870°C for 120 min. After the reaction, 18.5 g of crude bismuth was obtained by cooling and separation, and the grade of bismuth was 97.24% through chemical analysis. Add 600ml of tap water to the cooled smelting slag, shear and stir to make slurry, the slurry temperature is 60°C, and the slurry time is 60min. Afterwards, the slurry was separated from the liquid to the solid to obtain slurry slag and lye containing 71.3% ZnS, respectively. The pH of the lye is adjusted to about 8 with concentrated hydrochloric acid, and then placed in an autoclave for hydrothermal precipitation. The hydrothermal temperature is 330°C, the pressure is 20MPa, and the time is 180min. After the reaction...

Embodiment 2

[0050] The composition of bismuth tungsten concentrate provided is: Bi 16.45%, WO 3 3.17%, Fe 20.19%, SiO 2 6.21%, Cu 0.14%, S 21.5%.

[0051] Get above-mentioned tungsten-bismuth concentrate powder 100g, and 90g ZnO, 500g Na 2 CO 3 and 12g of pulverized coal were evenly mixed, and smelted at 950°C for 90 min. After the reaction was finished, 15.27 g of crude bismuth was obtained by cooling and separation, with a crude bismuth grade of 96.11%. Add 1000ml of tap water to the cooled smelting slag, shear and stir to make slurry, the slurry temperature is 75°C, and the slurry time is 90min. Afterwards, the slurry was filtered to obtain pulped slag and lye containing 73.17% ZnS, and the lye was adjusted to a pH of about 9 with acetic acid. The pH-adjusted solution was placed in an autoclave for hydrothermal precipitation at a temperature of 360 °C, a pressure of 22 MPa, and a time of 240 min. After the reaction is over, the solution is cooled and filtered to separate to obt...

Embodiment 3

[0053] The chemical composition of the bismuth molybdenum concentrate provided is (%): Bi 25.29, Mo 3.11, Fe 19.4, S 26.1, Cu 0.2, Pb 0.49, SiO 2 6.13.

[0054] Weigh 1000g of molybdenum-bismuth concentrate, 100g of coke, 850g of copper oxide soot containing 71% Cu and 4000g of sodium carbonate and mix them evenly. Smelting at 750°C for 2 hours yielded 249g of crude bismuth containing 98.2% Bi; after cooling, 4000mL of tap water was added to slurry at a temperature of 90°C for 2 hours, and then the slurry was filtered to obtain 61.4% CuS Slurry residue and lye. The pH of the lye is adjusted to about 9 with 50% concentrated nitric acid. The pH-adjusted solution was placed in an autoclave for hydrothermal precipitation at a temperature of 350° C., a pressure of 21 MPa, and a time of 400 minutes. After the reaction, the solution was cooled, filtered and separated to obtain molybdenum oxide hydrate powder (MoO 3 ·xH 2 O) 42.8g.

[0055] In the present invention, the bismuth...

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Abstract

The invention provides a method for smelting bismuth-molybdenum or bismuth-tungsten concentrates. The method comprises the following steps of: firstly carrying out low-temperature sulfur fixation smelting on the bismuth-molybdenum or bismuth-tungsten concentrates, and reducing bismuth sulfide and the like in the bismuth-molybdenum or bismuth-tungsten concentrates to metal bismuth; pulping the obtained smelting slag with water; and then putting alkaline liquor obtained through liquid-solid separation of slurry into an autoclave after regulating the pH value of the alkaline liquor to undergo hydrothermal reaction to obtain molybdenum oxide or tungsten oxide. The method has the beneficial effects that problems in existing bismuth-molybdenum or bismuth-tungsten concentrate smelting processes such as heavy pollution of low-concentration SO2 and heavy metal powder, high energy consumption and low efficiency and problems in the processes for extracting molybdenum or tungsten from smelting slag such as long flow, high energy consumption, low recovery rate of molybdenum or tungsten and the like are solved; and the method has the prominent advantages of small environment stress, strong raw material adaptability, simple flow and high recovery rate of metals.

Description

technical field [0001] The invention relates to the field of metallurgy and chemical industry, in particular to a smelting method for bismuth molybdenum or bismuth tungsten concentrate. Background technique [0002] my country is rich in bismuth resources, with a total reserve of 500,000-600,000 tons, concentrated in Hunan, Guangdong, Jiangxi, and Yunnan provinces. Among them, the reserves of bismuth in non-ferrous metal mines in Hunan account for 74% of the country's total, and are characterized by high grade and easy mining. It is the most important bismuth raw material base in my country. The Hunan Tungsten-Sn-Molybdenum-Bismuth Polymetallic Deposit is known as the World Mineral Museum, with a proven ore resource of 360 million tons and 143 types of minerals, including 746,000 tons of tungsten, 315,000 tons of bismuth, 468,000 tons of tin, Molybdenum is 130,000 tons, and the associated fluorite mineral reserves are 71.44 million tons. Among them, molybdenum and bismuth ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/34C22B34/36C22B30/06C22B3/46
CPCY02P10/20
Inventor 杨建广伏彩萍李永华
Owner HUNAN SHIZHUYUAN NON FERROUS METAL
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