Unlock instant, AI-driven research and patent intelligence for your innovation.

A process for separating antimony, lead and phosphorus from phosphate-containing lead removal slag produced by antimony smelting

A phosphate and lead slag removal technology, applied in the direction of improving process efficiency, can solve the problems of inability to separate antimony and lead, inability to separate antimony and lead, and limited use of ammonium phosphate salts, achieving low cost, good environment, The effect of high recovery rate

Active Publication Date: 2019-02-26
锡矿山闪星锑业有限责任公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that there is a lot of waste water, antimony and lead cannot be separated, and they still exist in the form of a mixture of high-lead antimony and oxygen. The ammonium phosphate obtained has limited uses. Due to environmental protection issues, ammonium phosphate is basically not used for crude antimony refining and removal. lead remover
The process is short, but cannot separate antimony and lead

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Alkaline leaching and separation of phosphate: crush the lead-removing residue and pass it through an 80-mesh sieve (the raw material de-lead residue is a phosphate-containing lead-removal residue, which is obtained by using phosphate for crude antimony refining to remove lead Lead removal residue. The mass content of some elements is Sb31.30%, Pb8.21%, P18.83%), take 2000g, add it to 8000mL water, add 800g ammonium bicarbonate, heat up to 60℃, leaching time is 80 minutes , Filtered to obtain the high-lead antimony oxygen filter residue, converted into 962.4g high-lead antimony oxygen dry product, the mass content of some elements analyzed is Sb64.12%, Pb16.78%, P2.21%, the filtrate is the mixed solution containing phosphate ( That is, a mixed salt solution containing ammonium phosphate) 7200mL, its chemical composition is Sb1.50g / L, Pb0.29g / L, P48.14g / L, pH=6.0. The obtained high lead antimony oxygen is used in the next step of hydrochloric acid leaching. In this p...

Embodiment 2

[0035] (3) Antimony trioxide is obtained by neutralizing the antimony trichloride solution: take the antimony trichloride solution obtained in step (2) of Example 1 to prepare the concentration of Sb120.00g / L, Pb0.64g / L, P4.20g / L solution, take 1000mL, at 90℃, add 360g of 80 mesh calcium carbonate powder (the ratio of calcium carbonate powder to antimony in antimony trichloride is 3.00:1), react for 60 minutes, and the end pH is 2.0, then filtered and dried to obtain 181.5g of antimony trioxide (some of the elements are Sb64.89%, Pb0.18%, P1.65% by mass) and calcium chloride solution (including washing water) 1200mL (part of the elements The mass concentration of Sb is 0.25g / L, Pb0.26g / L, P0.78g / L).

[0036] The calcium carbonate powder is a powder obtained by pulverizing natural calcium carbonate ore containing 90% by weight of calcium carbonate.

[0037] (4) Precipitation of phosphate-containing mixed solution to produce calcium phosphate: Take 1000 mL of ammonium phosphate-con...

Embodiment 3

[0042] (3) Antimony trichloride solution is neutralized to obtain antimony trioxide: take the antimony trichloride solution obtained in step (2) of Example 1 to prepare the concentration of Sb99.78g / L, Pb0.54g / L, P3.49g / L solution, take 1000mL, add 80 mesh calcium carbonate powder 245g (the ratio of calcium carbonate powder to antimony in antimony trichloride is 2.46:1) at 85℃, react for 65 minutes, the final pH is 2.1, then filter and dry to obtain 153.6g of antimony trioxide (part of the element mass content is Sb64.12%, Pb0.20%, P1.62%) and calcium chloride solution (including washing water) 1200mL (part of the element content) The mass concentration is Sb0.26g / L, Pb0.18g / L, P0.79g / L).

[0043] The calcium carbonate powder is a powder obtained by pulverizing natural calcium carbonate ore containing 92 wt% calcium carbonate.

[0044] (4) Precipitation of phosphate-containing mixed solution to produce calcium phosphate: Take 1000 mL of ammonium phosphate-containing mixed salt so...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an antimony-lead-phosphorus separating technology for phosphate-containing lead-removing slag generated in antimony smelting. The antimony-lead-phosphorus separating technology includes the steps of 1, carrying out alkaline leaching and separating phosphate; 2, carrying out high lead antimony oxide acid leaching and separating antimony and lead; 3, neutralizing antimony butter solutions and obtaining antimonous oxides; 4, settling mixed solutions containing phosphate and generating calcium phosphate; and 5, converting the calcium phosphate into phosphoric acid. According to the technology for treating the phosphate-containing lead-removing slag, the antimony, the lead and the phosphorus can be completely separated, the antimonous oxides, lead chloride and the phosphoric acid can be obtained, the process is eco-friendly, and the cost is low. The obtained phosphoric acid continuously returns to the refining step of crude antimony for removing the lead, thereby being recyclable.

Description

Technical field [0001] The invention relates to a process for separating antimony, lead and phosphorus from phosphate-containing lead-removing slag produced by smelting antimony, in particular to a wet method for effectively separating antimony and lead by adopting phosphate refining and removing lead-removing slag during antimony smelting process Phosphoric acid method. Background technique [0002] Most of the lead associated with antimony ore enters crude antimony during the antimony smelting process, and the final product refined antimony or antimony trioxide has strict requirements on the lead content. For this reason, lead removal is an indispensable process in antimony smelting by fire. In the process of pyrometallurgical smelting and refining of antimony, phosphates are often used to remove lead. In the refining process, phosphate and lead generate lead phosphate or lead metaphosphate, which becomes scum and separates from antimony liquid. This slag is called lead remov...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B3/14C22B3/12C22B3/10C22B13/00C22B30/02
CPCC22B3/10C22B3/12C22B3/14C22B7/007C22B7/008C22B7/04C22B13/045C22B30/02Y02P10/20
Inventor 刘鹊鸣单桃云廖光荣邓卫华金承永袁渊曹艳辉
Owner 锡矿山闪星锑业有限责任公司