Prepn process of iron red with salfated roasted dreg of sulfur containing aurin ore

A technology of sulfuration roasting and gold concentrate, applied in the direction of iron oxide, iron oxide/iron hydroxide, fibrous filler, etc., can solve the problems of rising raw material prices, air pollution, and shortage of raw materials, and increase the utilization of tailings resources efficiency, reduce environmental pollution, and improve efficiency

Inactive Publication Date: 2006-05-17
DONGHUA UNIV +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Such as patent CN1102626A, CN1177572A, generally use ferrous sulfate heptahydrate, a by-product of titanium dioxide production, pickling solution, electrolytic anode slime, sulfuric acid slag or iron concentrate, etc. as raw materials, and prepare iron red by oxidation method in the presence of iron sheet , the disadvantage of this method is that high-quality iron sheets are used as raw materials, which may easily cause a shortage of raw materials or a high price of raw materials
In addition, in the enhanced acid dissolution of sulfur-containing gold concentrate sulphated roasting slag (application number 200410067020.7), the method for improving the leaching rate of gold and silver by acid leaching slag is proposed through enhanced acid leaching; the conventional utilization process of acid leaching slag is through Gold extraction by cyanidation, the content of ferric oxide, iron ferric oxide, lead and arsenic in the cyanide slag of gold extraction is relatively high, some of which are prepared by magnetic separation to produce inferior iron red, and some are pulled by cement plants to make auxiliary materials, because of high temperature combustion Release a large amount of polluting gases such as sulfur dioxide and arsenic trioxide, polluting the atmosphere
Some are piled up near the mine, which is easy to cause spontaneous combustion and pollute the atmosphere; at the same time, the harmful cyanide ions and metal ions contained in the cyanide slag are also easy to flow into the water or soil, causing environmental pollution, so it is necessary to deal with it. Turning waste into treasure

Method used

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  • Prepn process of iron red with salfated roasted dreg of sulfur containing aurin ore

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Add 60% sulfuric acid in a reactor with a stirrer, start the stirrer to stir, add the calcined slag at one time, the weight ratio of the calcined slag and the sulfuric acid solution is 2:1, and the weight ratio of the calcined slag and the co-solvent is 1:1, The composition of co-solvent is 1% sodium edetate, 30% CuO, 20% Fe 2 o 3 , 40% SiO 2 and 9% Al 2 o 3 , Reaction at 80°C for 6 hours, the leaching rate of iron is 100%, and the leaching rate of gold and silver is over 98%. Filtrate, neutralize the filtrate with ammonia water until the pH value is 1, add flocculant ferric chloride to remove the precipitate, separate the co-solvent, and then add ammonia water at 50°C until the iron ions are completely precipitated. After filtering, the filtrate is used to recover ammonia water and alkali, and the filter residue is washed, dried and calcined at 300°C. The calcined iron red is ground to the particle size required by the iron red pigment, that is, high-quality iron ...

Embodiment 2

[0014] Add 30% sulfuric acid in the reactor with stirrer, start the mixer to stir, add calcined slag at one time, the weight ratio of calcined slag and sulfuric acid solution is 10:1, the weight ratio of calcined slag and co-solvent is 50:1, The composition of co-solvent is 25% sodium edetate, 1% CuO, 30% Fe 2 o 3 , 60% SiO 2 The reaction temperature is 100° C., the reaction time is 1 hour, the leaching rate of iron is 100%, and the leaching rate of gold and silver is over 98%. The extract was filtered, the temperature of the system was lowered to room temperature, and then filtered. The filtrate was neutralized with alkali to a pH value of 1.3, flocculant alum was added to remove the precipitate, and the co-solvent was separated, and then ammonia water was added at 90°C until the iron ions were completely precipitated. After filtration, the filtrate is used to recover ammonia water and alkali, and the filter residue is washed, dried and calcined at 680°C. The calcined iro...

Embodiment 3

[0016] Add 45% sulfuric acid in the reactor with stirrer, start the mixer to stir, add calcined slag at one time, the weight ratio of calcined slag and sulfuric acid solution is 5: 1, the weight ratio of calcined slag and co-solvent is 100: 1, The composition of co-solvent is 10% sodium edetate, 2% CuO, 15% Fe 2 o 3 , 50% SiO 2 and 5% Al 2 o 3 The reaction temperature is 60°C, the reaction time is 5 hours, the leaching rate of iron is 100%, and the leaching rate of gold and silver is over 98%. The extract was filtered, the temperature of the system was lowered to room temperature, and then filtered. The filtrate is neutralized with alkali until the pH value is 1.5, and the flocculant polyacrylamide is added to remove the precipitate, and the co-solvent is separated, and then ammonia water is added at 90°C until the iron ions are completely precipitated. After filtration, the filtrate is used to recover ammonia water and alkali, and the filter residue is washed, dried and ...

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Abstract

The preparation process of iron red with sulfated roasted dregs of sulfur containing aurin ore includes the following steps: 1. adding 30-60 % concentration sulfuric acid and roasted dregs in the weight ratio of 1 to 2-10 via stirring, adding co-solvent in 0.01-1 time the weight of roasted dregs, reacting at 60-100 deg.c for 1-6 hr, and filtering to obtain filtrate and filter residue; 2. neutralizing the filtrate with ammonia water, controlling pH 1-2, adding ammonia water at 50-90 deg.c to precipitate partial iron ion and adding flocculant; and 3. washing the obtained precipitate, drying, calcining at 300-700 deg.c and grinding to required fineness to obtain iron red. The present invention has the advantages expanded iron red preparing material range, raised tail ore resource utilization, raised post gold extracting efficiency, lowered power consumption, and lowered environmental pollution.

Description

technical field [0001] The present invention relates to a kind of industrial solid waste recycling, reduction and harmless technology, in particular to a method of using sulfur-containing gold concentrate to prepare iron red from the leaching solution after intensive acid dissolution of sulphated roasting slag. Carry out the method of comprehensive utilization iron element, reduce its environmental pollution. Background technique [0002] In the prior art, iron red is a very important chemical pigment or magnetic material used in industry. Such as patent CN1102626A, CN1177572A, generally use ferrous sulfate heptahydrate, a by-product of titanium dioxide production, pickling solution, electrolytic anode slime, sulfuric acid slag or iron concentrate, etc. as raw materials, and prepare iron red by oxidation method in the presence of iron sheet The disadvantage of this method is that high-quality iron sheets are used as raw materials, which may easily cause a shortage of raw ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06C09C1/24
Inventor 李登新寇文胜钟非文彭国敏李志金俎小凤张武学张厚杰
Owner DONGHUA UNIV
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