Sulfide ore acid leaching - acid leaching of high impurity containing brass concentrate

    Acid leaching at high temperature oxidation, arsenic, antimony, and other secret precipitated together with the iron metal. When the temperature as a main acid leaching of copper ore concentrate Heiyou sample component is: Cu 26.5%, Sb 13.2% , As 6.8%, Fe 2.0%, Zn 2.9%, S 19.4%, Ag 0.27%, prior Add ferrous sulfate to make Fe/(As + Sb) = 1.5/1 ( mol) . in 220 ° C With a partial pressure of oxygen of 600 kPa , the leaching rates of copper and zinc reached 95.4% and 95.0%, respectively . The slag is leached with silver chloride solution and the leaching rate reaches 95.4% [1] .
In addition to producing iron arsenate

Fe 2 ( S0 4 ) 3 + 2H 3 As0 4 ==== 2FeAs0 4 + 3H 2 S0 4

Iron ions and arsenate also form basic salts

2Fe 2 ( S0 4 ) 3 + 2H 3 As0 4 +( 2 + n ) H 2 0 ==== 2Fe 2 ( As0 4 )( S0 4 ) OH·nH 2 0 + 4H 2 S0 4

Common arsenic and beryllium copper ores include Cu 2 Sb 4 S 13 , Cu 3 AsS 4 and Cu 12 As 4 S 13 . High pressure leaching containing one (%): Cu 22.6 , Sb 0.5 , As 8.6 , Fe 18.0 , S 35.4 , Ag 61g /t , Au 844g /t concentrate. in 200 ° C Dip or 3h 220 ° C After leaching for 1 h , the oxidation rate of sulfur reached 99% , and almost all of the antimony and more than 94% of the arsenic precipitated into the slag. The leaching rate of copper is 95% to 98% because dissolved copper forms a precipitate containing Fe-Cu-As-S-0 . Increasing the leaching temperature increases the amount of unstable sulfate precipitated and consumes more lime during cyanidation. 220 ° C Leaching cyanide leaching gold when consuming lime 130kg /t , and 200 ° C Leaching slag only consumes 50kg /t . The recovery rate of gold cyanide is between 87% and 96 %. The recovery rate of silver is very low because of the formation of silver pyrite salt.

SDDF QE series pressure filters are designed in accordance with international regulation, which consist of a Filter Housing with a screw on cover plate.

 

Standard equipment

-mounting holes in the filter head

-two-piece bowl for size 660 and above

-compatibility with fire-resistant fluids HFA/HFC

-drain plug with pressure relief(size 330 and above)

 

Connection Diagram

DF QE connection


Filter Element

Shengda is sure that our filters are of reliable performance so that they can protect hydraulic parts from polluting and machines from abrasion.

 

Filter elements are available with the following pressure stability values

BN/HC:25bar

BH/HC:210bar

W/HC:30bar

V:210bar

 

Seals

-NBR(=NBR)

 

Special models and accessories

-with bypass valve

-drain plug with pressure relief

-seals in FPM, EPDM


DF QE MODE CODE



DF QE dimension


Flange-Mounted Pressure Filter

Grader Filter,High Pressure Filter,Flange-Mounted High Pressure Filter,Flange-Mounted Pressure Filter

Xinxiang Shengda Filtration Technique Co., Ltd. , https://www.filtrations.nl