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Two ore combined process for treatment of laterite nickel ore and pyrolusite

A technology of lateritic nickel ore and combined method, which is applied in the field of metal mineral smelting, can solve the problems of environmental pollution, dust pollution, large coal consumption, etc., and achieve the effects of saving production costs, improving production efficiency, and improving effective utilization

Active Publication Date: 2014-01-15
DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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Problems solved by technology

But it produces SO 2 1. Dust seriously pollutes the environment and consumes a lot of coal; the two-mine roasting method grinds pyrolusite and manganese sulfate separately, mixes ingredients, roasts at 500°C-600°C for 0.5-1 hour, and then leaches with clean water, separates the slag and concentrates Manganese sulfate is obtained by crystallization, which also produces SO 2 and dust, pollute the environment; the wet reduction leaching process mixes pyrolusite, sulfuric acid and a certain amount of reducing agent, and the manganese sulfate solution can be obtained by leaching with water at a certain temperature for a certain period of time. This method is the development of pyrolusite leaching. Direction, not yet applied to industrial production

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  • Two ore combined process for treatment of laterite nickel ore and pyrolusite
  • Two ore combined process for treatment of laterite nickel ore and pyrolusite
  • Two ore combined process for treatment of laterite nickel ore and pyrolusite

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Embodiment Construction

[0047] The Philippine laterite nickel ore and Gabon pyrolusite were used as raw materials, and the contents (mass fraction) of the main chemical components are shown in Table 1.

[0048] Table 1 Contents of main chemical components of Philippine laterite nickel ore and Gabon pyrolusite (%)

[0049]

[0050] 1. Preparation of ferrous oxide powder containing nickel and cobalt by fire method

[0051] The raw materials (including laterite nickel ore and reduced coal) are placed in an electric heating constant temperature blast drying oven and dried at a temperature of 105°C. Among them, laterite nickel ore requires H 2 O≤10%, the reduced coal is baked to constant weight. According to a certain ratio (laterite nickel ore: coal = 100:16), the baked raw materials are fully mixed and set aside. A small pulverizer is used to grind the mixture to a certain particle size, and the passing rate under a 100-mesh sieve is required to be ≥95%.

[0052] The ground raw materials...

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Abstract

The invention relates to a two ore combined process for treatment of laterite nickel ore and pyrolusite. The process includes the following steps: mixing laterite nickel ore with coal and roasting to obtain a ferrous oxide powder containing nickel and cobalt; leaching the ferrous oxide powder containing nickel and cobalt with concentrated sulfuric acid; after filtering, adding ammonium sulfate to the solution, controlling the concentration of H2SO4, adding pyrolusite to oxidize Fe<2+> into Fe<3+> and reduce Mn<4+> into Mn<2+>, and filtering to obtain a MnSO4-containing solution and an ammonium jarosite precipitate; adding a vulcanizing agent to the MnSO4-containing solution to produce sulfide nickel and cobalt sulfide precipitates, drying the precipitates to obtain a mixed powder of sulfide nickel and cobalt sulfide; and roasting the obtained ammonium jarosite precipitate, washing by water and drying to obtain crude iron red. The process can extract valuable metallic elements nickel, cobalt, iron and manganese from the two ores; and compared to respective treatment on the laterite nickel ore and manganese ore, the process saves production cost and improves production efficiency.

Description

technical field [0001] The invention relates to the field of metal mineral smelting, in particular to a method for recovering metal minerals from laterite nickel ore and pyrolusite. Background technique [0002] At present, among the proven onshore nickel ore data, the industrial reserves of nickel metal are 80 million tons. Nickel minerals mainly exist in two forms: nickel sulfide and laterite nickel ore, of which nickel sulfide ore accounts for about 20%, and laterite nickel ore About 75% of nickel ore and nickel silicate ore account for 5%. The development and utilization of nickel ore is mainly nickel sulfide ore and laterite nickel ore. The main nickel-producing countries are Canada, Russia, Australia, the Philippines, Cuba, and China. In nickel oxide ore, laterite nickel ore has high iron content, low silicon and magnesium content, and 1% to 2% nickel content. At present, the development and utilization of nickel oxide ore is mainly based on laterite nickel ore, which...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B47/00C22B1/02C22B3/06
Inventor 陈发明明宪权陈南雄闭伟宁张丽云何溯结许继元邓庆玲许金精许秀莲韦婷婷
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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