Clean production method in atmospheric pressure leaching of limonite type laterite-nickel ore with hydrochloric acid

The invention relates to a clean production method in atmospheric pressure leaching of limonite type laterite-nickel ore with hydrochloric acid. The clean production method comprises the following steps: 1) mixing the limonite type laterite-nickel ore with hydrochloric acid for performing atmospheric pressuring leaching reaction; 2) performing calcination reaction to the pickle liquor obtained from the step 1); 3) dedusting the hydrogen chloride gas obtained from the step 2) to enter an absorption tower for producing hydrochloric acid, and collecting iron oxide powder; 4) washing and filtering the iron oxide powder, obtained from the step 3) with clean water; 5) performing liquid oxidizing reaction to solid filter cakes obtained from the step 4) to prepare corresponding chromium products, wherein the fine iron powder is obtained by slag phase; and 6) preparing the acid filtrate obtained from the step 4) into Ni and Co products. Through the clean production method, the separation of iron from nickel, cobalt and chrome in the atmospheric pressure leachate of the limonite type laterite-nickel ore can be realized, and the problem that the atmospheric pressure leachate of the limonite type laterite-nickel ore is difficultly treated can be effectively solved.