CN103071595A - Flotation method for gallium in fly ash - Google Patents

Abstract

The invention discloses a production process for flotation of gallium in fly ash. The production process comprises the following steps of: a, selecting a certain amount of fly ash of Qinghai Western Mining Industry Tanghu Power Plant into a floatation machine, wherein the gallium content in the fly ash is 25 g/T; b, adding a certain amount of flotation regulator, such as water glass, an octadecylamine flotation agent and a foaming agent such as No. 2 oil, into the floatation machine; c, performing flotation by using a roughing and scavenging floatation process under room temperature; and d, obtaining gallium concentrate with gallium grade of 40 g/T, wherein the recovery rate is 90 percent. According to the method, the problems of relatively low gallium content in the fly ash, large treatment capacity of a direct acid leaching or alkaline leaching process, large amount of required leachate, high recovery cost, high raw material consumption and serious environmental pollution existing in the conventional direct gallium leaching process of the fly ash are solved, the amount of ore to be treated can be reduced by 50 percent by using the fly ash gallium floatation process under the condition of slightly reduced recovery rate, and the leaching cost is greatly saved.

Description

The method of flotation gallium in a kind of flyash

Technical field

The present invention relates to the technique of preparing field, specifically relate to a kind of gallium in the flyash be carried out FLOTATION SEPARATION, thereby reduce the method that gallium leaches treating capacity.

Background technology

In the earth's crust, gallium is without mineral reserve independently, main with rare loose form association in other mineral reserve, such as plumbous zinc ore, tin ore, aluminium ore etc.Research is found, also is rich in gallium in the flyash of power plant, and the content of gallium does not wait at 12～230 grams/ton in the flyash, and potential economic worth is very considerable.According to statistics, China's flyash quantum of output in 2000 reaches 1.5 hundred million t, can extract gallium 1800t～34500t, is 4300 yuan/kilogram by price.Can create and produce 77.4 hundred million～1483.5 hundred million yuan.Find out that thus extracting the rare metal such as gallium in the flyash can become an important point of economic increase.

The technique that existing flyash extracts gallium mainly is to adopt with acid or alkali direct leaching process, and such as US4678647, CN101284668A, CN101838738A adopt these class methods.Because gallium content is relatively low in the flyash, directly acidleach or alkali soaking technology treating capacity are larger, and the leaching liquid measure that needs is also larger, cause cost recovery high, consumption of raw materials is large, and environmental pollution is serious, so that most of enterprise has to the resource of preciousness is abandoned as refuse.Mineral resources are non-renewable, and the mankind will realize sustainable development, must fully utilize efficiently these resources, and it is technical barriers that we are badly in need of solving that how effective, low cost reclaims these limited and valuable resources.

Bibliographical information (Wang Ning etc. are arranged, the occurrence status of gallium and comprehensive reutilization research in the flyash, mineral journal, 2007), there is a surface that is adsorbed on flyash in the part of gallium, and another kind is that conversion enters in the Al-Si vitreum in the lattice after by burning.By the occurrence status of gallium as can be known, adopt the way of enrichment bauxite to make gallium to a certain degree also obtain enrichment the aluminum contained compound enrichment, thereby reduce the treating capacity that leaches, reduce and leach cost.

Summary of the invention

The present invention is directed to from flyash that to leach treating capacity when extracting gallium large, consumption of raw materials is serious, high, the serious problem of environmental pollution of leaching cost, propose first the gallium in the flyash to be carried out floating and enriching and separate, thus a kind of method of reduction treating capacity, reduction processing cost.

The method of flotation gallium may further comprise the steps in a kind of flyash of the present invention:

A. flyash and the 1L water of getting 300 grams add in the flotation device, and gallium content is 25 grams/ton in the flyash;

B. in flotation device, add waterglass 100 grams/ton, stir 2min; Add octadecylamine floating agent 300-400 gram/ton, add 1 No. two oily 70-100 gram/tons of foaming agent after stirring 5 min, stir 3 min; Open the air-blowing device, flotation 5 min; Get the gallium concentrate;

C. at room temperature adopt one slightly to sweep technique and carry out FLOTATION SEPARATION, add octadecylamine 100 grams/ton when scanning, No. two oily 30-50 gram/tons, flotation time is 5 min;

D. will roughly select scavenger concentrate and merge, and obtain containing the gallium concentrate that the gallium grade is 37.7-45 gram/ton, the rate of recovery is 90-90.5%, and the gallium concentrate is equivalent to 50% of raw ore.

Advantage of the present invention and effect:

Floatation process of the present invention directly carries out flotation to flyash, does not need that flyash is carried out ore grinding and processes, and produce power does not expend, and technique is simple; Reagent consumption is less, and the amount of main floating agent such as octadecylamine is 400 grams/ton, and does not need ore pulp is carried out acid-base accommodation in floatation process, directly carries out flotation under the neutrallty condition and processes, and the flotation disposal cost is low; Process by flotation, the gallium content in the gallium concentrate is brought up to 45 grams/ton from 25 grams of raw ore/ton, and the rate of recovery is up to 90%, and pending ore deposit amount is reduced to 50% of raw ore, greatly reduces pending ore deposit amount.

Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:

Description of drawings:

Fig. 1 is the process chart of flotation gallium in the flyash of the present invention, and this process using one slightly sweeps technique.

The specific embodiment

Be described in further detail below in conjunction with the method and technology scheme of the drawings and specific embodiments to flotation gallium in a kind of flyash of the present invention.

As shown in Figure 1, the method for flotation gallium in a kind of flyash is characterized in that described method may further comprise the steps:

A. flyash and the 1L water of getting 300 grams add in the flotation device, and gallium content is 25 grams/ton in the flyash;

B. in flotation device, add waterglass 100 grams/ton, stir 2min; Add octadecylamine floating agent 300-400 gram/ton, add 1 No. two oily 70-100 gram/tons of foaming agent after stirring 5 min, stir 3 min; Open the air-blowing device, flotation 5 min; Get the gallium concentrate;

C. at room temperature adopt one slightly to sweep technique and carry out FLOTATION SEPARATION, add octadecylamine 100 grams/ton when scanning, No. two oily 30-50 gram/tons, flotation time is 5 min;

D. will roughly select scavenger concentrate and merge, and obtain containing the gallium concentrate that the gallium grade is 37.7-45 gram/ton, the rate of recovery is 90-90.5%, and the gallium concentrate is equivalent to 50% of raw ore.

Embodiment 1.

Get flyash 300g and insert in the flotation device, then add the water of 1L, add waterglass 100 grams/ton, modulus of water glass is 2.4, starts flotation device, stirs 2min; Adding octadecylamine uses hydrochloric acid: octadecylamine=1:3 that octadecylamine is dissolved in the water in hot water; 300 grams/ton add oil 70 grams/ton No. two behind the stirring 5min, stir 3min; Open the air-blowing device, flotation 5min.Obtain a part of gallium concentrate.Add octadecylamine 100 grams/ton when scanning, No. two oil 30 grams/tons, flotation time is 5min.To roughly select scavenger concentrate and merge, and finally obtain gallium concentrate 150 grams, the gallium grade is 45 grams/ton, and the gallium rate of recovery is 90%.

Embodiment 2.

Get flyash 300g and insert in the flotation device, then add the water of 1L, add waterglass 100 grams/ton, modulus of water glass is 2.4, starts flotation device, stirs 2min; Adding octadecylamine uses hydrochloric acid: octadecylamine=1:3 that octadecylamine is dissolved in the water in hot water; 300 grams/ton add oil 70 grams/ton No. two behind the stirring 5min, stir 3min; Open the air-blowing device, flotation 5min.Obtain a part of gallium concentrate.Add octadecylamine 100 grams/ton when scanning, No. two oil 30 grams/tons, flotation time is 5min.To roughly select scavenger concentrate and merge, and finally obtain gallium concentrate 150 grams, the gallium grade is 40 grams/ton, and the gallium rate of recovery is 90%.

Embodiment 3.

Get flyash 300g and insert in the flotation device, then add the water of 1L, add waterglass 100 grams/ton, modulus of water glass is 2.4, starts flotation device, stirs 2min; Adding octadecylamine uses hydrochloric acid: octadecylamine=1:3 that octadecylamine is dissolved in the water in hot water; 400 grams/ton add oil 100 grams/ton No. two behind the stirring 5min, stir 3min; Open the air-blowing device, flotation 5min.Obtain a part of gallium concentrate.Add octadecylamine 100 grams/ton when scanning, No. two oil 50 grams/tons, flotation time is 5min.To roughly select scavenger concentrate and merge, and finally obtain gallium concentrate 180 grams, the gallium grade is 37.7 grams/ton, and the gallium rate of recovery is 90.5%.

Claims (1)

1. the method for flotation gallium in the flyash is characterized in that described method may further comprise the steps:

A. flyash and the 1L water of getting 300 grams add in the flotation device, and gallium content is 25 grams/ton in the flyash;

B. in flotation device, add waterglass 100 grams/ton, stir 2min; Add octadecylamine floating agent 300-400 gram/ton, add 1 No. two oily 70-100 gram/tons of foaming agent after stirring 5 min, stir 3 min; Open the air-blowing device, flotation 5 min; Get the gallium concentrate;

C. at room temperature adopt one slightly to sweep technique and carry out FLOTATION SEPARATION, add octadecylamine 100 grams/ton when scanning, No. two oily 30-50 gram/tons, flotation time is 5 min;

D. will roughly select scavenger concentrate and merge, and obtain containing the gallium concentrate that the gallium grade is 37.7-45 gram/ton, the rate of recovery is 90-90.5%, and the gallium concentrate is equivalent to 50% of raw ore.